DHCP Commands on Cisco IOS XR Software
This chapter describes the Cisco IOS XR software commands used to configure and monitor the Dynamic Host Configuration Protocol (DHCP).
allow-hint
To allow the server to delegate a valid client-suggested prefix in the solicit and request messages, use the allow-hint command in Dynamic Host Configuration Protocol (DHCP) IPv6 interface server configuration mode. To disable the delegation of a valid client-suggested prefix, use the no form of the command.
allow-hint
no allow-hint
Syntax Description
This command has no arguments or keywords.
Defaults
DHCPv6 service on an interface is disabled.
Command Modes
DHCP IPv6 interface server configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and the Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
The allow-hint command enables the server to delegate a client-suggested prefix in the solicit and request messages if the prefix in the associated local prefix pool is a valid prefix and it is not assigned to any other solicit and request messages. Otherwise, the hint is ignored, and a prefix is delegated from the free list in the pool.
Examples
The following is an example of the allow-hint command:
RP/0/RP0/CPU0
:router#
configure
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6 interface pos 0/5/0/0 server
RP/0/RP0/CPU0
:router(config-dhcpv6-if)#
allow-hint
broadcast-flag policy check
To configure Dynamic Host Configuration Protocol (DHCP) IPv4 Relay to only broadcast BOOTREPLY packets, if the DHCP IPv4 broadacst flag is set in the DHCP IPv4 header, use the broadcast-flag policy check command in DHCP IPv4 relay profile configuration submode. By default, the DHCP IPv4 Relay always broadcasts BOOTREPLY packets. To restore the default, use the no form of this command.
broadcast-flag policy check
no broadcast-flag policy check
Syntax Description
This command has no arguments or keywords.
Defaults
Relay agent always broadcasts DHCP IPv4 packets to a client.
Command Modes
DHCP IPv4 relay profile configuration
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following is an example of the broadcast-flag policy check command:
RP/0/RP0/CPU0:router#
config
RP/0/RP0/CPU0:router(config)#
dhcp ipv4
RP/0/RP0/CPU0:router(config-dhcpv4)#
profile client relay
RP/0/RP0/CPU0:router(config-dhcpv4-relay-profile)#
broadcast-flag policy check
Related Commands
|
|
dhcp ipv4 |
Enables DHCP for IPv4 and enters DHCP IPv4 configuration mode. |
giaddr policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a nonzero giaddr attribute. |
helper-address |
Configures the DHCP relay agent to relay packets to a specific DHCP server. |
interface (relay profile) |
Specifies a relay profile on an interface. |
profile relay |
Configures a relay profile for the DHCP IPv4 component. |
relay information check |
Configures a DHCP server to validate the relay agent information option in forwarded BOOTREPLY messages. |
relay information option |
Enables the system to insert a DHCP relay agent information option in forwarded BOOTREQUEST messages to a DHCP server. |
relay information option allow-untrusted |
Configures the DHCP component to not drop BOOTREQUEST messages that have the relay information option set and the giaddr set to zero. |
relay information policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a relay information option. |
vrf (relay profile) |
Specifies a relay profile on a VRF. |
clear dhcp ipv6 binding
To delete automatic client bindings from the Dynamic Host Configuration Protocol (DHCP) for IPv6 binding table, use the clear ipv6 dhcp binding command in EXEC mode.
clear dhcp ipv6 binding [ipv6-address]
Syntax Description
ipv6-address |
(Optional) Address of a DHCP for an IPv6 client. This argument must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons. |
Command Default
No default behavior or values
Command Modes
EXEC
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and the Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
The clear ipv6 dhcp binding command is used as a server function.
A binding table entry on the DHCP for IPv6 server is automatically:
•Created whenever a prefix is delegated to a client from the configuration information pool
•Updated when the client renews, rebinds, or confirms the prefix delegation
•Deleted when the client releases all the prefixes in the binding voluntarily, all prefixes' valid lifetimes have expired, or an administrator runs the clear ipv6 dhcp binding command.
If the clear ipv6 dhcp binding command is used with the optional ipv6-address argument specified, only the binding for the specified client is deleted. If the clear ipv6 dhcp binding command is used without the ipv6-address argument, then all automatic client bindings are deleted from the DHCP for IPv6 binding table.
Examples
The following example specifies DHCP for IPv6 binding database agent parameters:
RP/0/RP0/CPU0
:router#
clear dhcp ipv6 binding
Related Commands
database
To configure a Dynamic Host Configuration Protocol (DHCP) for IPv6 binding database agent, use the database command in DHCP IPv6 configuration mode. To delete the database agent, use the no form of this command.
database agent-URL [write-delay seconds] [timeout seconds]
no database agent-URL
Syntax Description
agent-URL |
A Flash, NVRAM, FTP, TFTP, or Remote Copy Protocol (RCP) uniform resource locator. |
write-delay seconds |
(Optional) How often (in seconds) DHCP for IPv6 sends database updates. The default is 300 seconds. The minimum write delay is 60 seconds. |
timeout seconds |
(Optional) Length of time, in seconds, the router waits for a database transfer. |
Defaults
Write-delay default is 300 seconds.
Timeout default is 300 seconds
Command Modes
DHCP IPv6 configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
The database command specifies DHCP for IPv6 binding database agent parameters. The user may configure multiple database agents.
The write-delay keyword specifies how often, in seconds, that DHCP sends database updates. By default, DHCP for IPv6 server waits 300 seconds before sending any database changes.
The timeout keyword specifies how long, in seconds, the router waits for a database transfer. Infinity is defined as 0 seconds, and transfers that exceed the timeout period are aborted. By default, the DHCP for IPv6 server waits 300 seconds before aborting a database transfer. When the system is going to reload, there is no transfer timeout so that the binding table can be stored completely.
Examples
The following example specifies DHCP for IPv6 binding database agent parameters:
RP/0/RP0/CPU0
:router#
configure
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6
RP/0/RP0/CPU0
:router(config-dhcpv6)#
database tftp://10.0.0.1/dhcp-binding
Related Commands
|
|
dhcp ipv6 |
Enables Dynamic Host Configuration Protocol (DHCP) for IPv6 and enters DHCP IPv6 configuration mode. |
interface (DHCP) |
Enables DHCP for IPv6 on an interface. |
show dhcp ipv6 database |
Displays the DHCP for the IPv6 binding database information. |
destination (DHCP IPv6)
To specify a destination address to which client messages are forwarded and to enable Dynamic Host Configuration Protocol (DHCP) for IPv6 relay service on the interface, use the destination command in DHCP IPv6 interface relay configuration mode. To remove a relay destination on the interface or delete an output interface for a destination, use the no form of this command.
destination {ipv6 address} interface
no destination {ipv6 address} interface
Syntax Description
ipv6 address address |
IPv6 address in the form documented in RFC 2373, where the address is specified in hexadecimal using 16-bit values between colons. |
interface |
Either a physical interface instance or a virtual interface instance as follows: •Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation. –rack: Chassis number of the rack. –slot: Physical slot number of the modular services card or line card. –module: Module number. A physical layer interface module (PLIM) is always 0. –port: Physical port number of the interface. Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0. Example: interface MgmtEth0/RP1/CPU0/0. •Virtual interface instance. Number range varies depending on interface type. For more information about the syntax for the router, use the question mark (?) online help function. |
Defaults
Relay function is disabled and there is no relay destination on the interface.
Command Modes
DHCP IPv6 interface relay configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
The destination command specifies a destination address to which client messages are forwarded and enables DHCP for IPv6 relay service on the interface. When relay service is enabled on an interface, a DHCP for IPv6 message received on that interface is forwarded to all configured relay destinations. The incoming DHCP for IPv6 message may have come from a client on that interface, or it may have been relayed by another relay agent.
The relay destination can be a unicast address of a server or another relay agent, or it may be a multicast address. There are the following two types of relay destination addresses:
•A link-scoped unicast or multicast IPv6 address, for which a user must specify an output interface
•A global or site-scope unicast IPv6 address, for which a user can specify an output interface for this kind of address.
•A global or site-scope multicast IPv6 address, for which a user can specify an output interface for this kind of address if 'mhost ipv6 default-interface' is specified.
If no output interface is configured for a destination, the output interface is determined by routing tables. In this case, it is recommended that a unicast or multicast routing protocol be running on the router.
Multiple destinations can be configured on one interface, and multiple output interfaces can be configured for one destination. When the relay agent relays messages to a multicast address, it sets the hop limit field in the IPv6 packet header to 32.
Unspecified, loopback, and node-local multicast addresses are not acceptable as the relay destination. If any one of them is configured, the message "Invalid destination address" is displayed.
Note that it is not necessary to enable the relay function on an interface for it to accept and forward an incoming relay reply message from servers. By default, the relay function is disabled, and there is no relay destination on an interface. The no form of the command removes a relay destination on an interface or deletes an output interface for a destination. If all relay destinations are removed, the relay service is disabled on the interface.
The DHCP for IPv6 client, server, and relay functions is mutually exclusive on an interface. When one of these functions is already enabled and a user tries to configure a different function on the same interface, one of the following messages is displayed: "Interface is in DHCP client mode," "Interface is in DHCP server mode," or "Interface is in DHCP relay mode."
Examples
The following is an example of the destination command on a Packet over Sonet/SDH (POS) interface:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6
RP/0/RP0/CPU0:router(config-dhcpv6)# interface pos 0/5/0/0 relay
RP/0/RP0/CPU0
:router(config-dhcpv6-if)#
destination 10:10::10
Related Commands
dhcp ipv4
To enable Dynamic Host Configuration Protocol (DHCP) for IPv4 and to enter DHCP IPv4 configuration mode, use the dhcp ipv4 command in global configuration mode. To disable DHCP for IPv4 and exit the DHCP IPv4 configuration mode, use the no form of this command.
dhcp ipv4
no dhcp ipv4
Syntax Description
This command has no arguments or keywords.
Command Modes
Global configuration
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Use the dhcp ipv4 command to enter DHCP IPv4 configuration mode.
Examples
The following example shows how to enable DHCP for IPv4:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv4
RP/0/RP0/CPU0
:router (config-dhcpv4)#
Related Commands
dhcp ipv6
To enable Dynamic Host Configuration Protocol (DHCP) for IPv6 and to enter DHCP IPv6 configuration mode, use the dhcp ipv6 command in global configuration mode. To disable, use the no form of this command.
dhcp ipv6
no dhcp ipv6
Syntax Description
This command has no arguments or keywords.
Command Modes
Global configuration
Command History
|
|
Release 3.6.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Use the dhcp ipv6 command to enter DHCP IPv6 configuration mode.
Examples
The following example shows how to enable DHCP for IPv6:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6
RP/0/RP0/CPU0
:router (config-dhcpv6)#
Related Commands
|
|
database |
Configures a Dynamic Host Configuration Protocol (DHCP) for IPv6 binding database agent. |
distance |
Specifies an administrative distance for Dynamic Host Configuration Protocol (DHCP) for IPv6 Prefix Delegation. |
interface (DHCP) |
Enables Dynamic Host Configuration Protocol (DHCP) for IPv6 on an interface. |
pool (DHCP IPv6) |
Configures a Dynamic Host Configuration Protocol (DHCP) for the IPv6 server configuration information pool and enters DHCP for IPv6 pool configuration mode. |
distance
To specify an administrative distance for Dynamic Host Configuration Protocol (DHCP) for IPv6 Prefix Delegation, use the distance command in DHCP IPv6 configuration mode. To delete an administrative distance, use the no form of this command.
distance administrative distance
no distance administrative distance
Syntax Description
administrative distance |
User defined distance. The range is 1 to 255. |
Defaults
administrative distance: 1
Command Modes
DHCP IPv6 configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following is an example of setting the DHCP administrative distance to 200 using the distance command:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6
RP/0/RP0/CPU0
:router (config-dhcpv6)#
distance 200
Related Commands
|
|
dhcp ipv6 |
Enables Dynamic Host Configuration Protocol (DHCP) for IPv6 and enters DHCP IPv6 configuration mode. |
dns-server
To specify the Domain Name System (DNS) IPv6 servers available to a Dynamic Host Configuration Protocol (DHCP) for IPv6 client, use the dns-server command in DHCP IPv6 pool configuration mode. To remove the DNS server list, use the no form of this command.
dns-server ipv6-address
no dns-server ipv6-address
Syntax Description
ipv6-address |
IPv6 address of a DNS server. This argument must be in the form documented in RFC 2373, where the address is specified in hexadecimal using 16-bit values between colons. |
Defaults
When a DHCP for IPv6 pool is first created, no DNS IPv6 servers are configured.
Command Modes
DHCP IPv6 pool configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Multiple Domain Name System (DNS) server addresses can be configured by issuing this command multiple times. New addresses do not overwrite old addresses.
Examples
The following is an example of setting the DNS server name using the dns-server command:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6 pool pool1
RP/0/RP0/CPU0
:router(config-dhcpv6-pool)#
dns-server 10:10::10
Related Commands
|
|
pool (DHCP IPv6) |
Configures a Dynamic Host Configuration Protocol (DHCP) for the IPv6 server configuration information pool and enters DHCP for IPv6 pool configuration mode. |
domain-name (DHCP IPv6 pool)
To configure a domain name for a Dynamic Host Configuration Protocol (DHCP) for IPv6 client, use the domain-name command in DHCP IPv6 pool configuration mode. To remove the domain name, use the no form of this command.
domain-name domain
no domain-name
Syntax Description
domain |
Specifies the domain name string to be used by the client. |
Defaults
When a DHCP for IPv6 pool is first created, no domain name for clients is configured.
Command Modes
DHCP IPv6 pool configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Multiple Domain Name System (DNS) domain names can be configured by issuing the domain-name command multiple times. The new domain name does not overwrite existing domain names.
Examples
The following is an example of how to configure a DHCP IPv6 domain name using the domain-name command:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6 pool pool1
RP/0/RP0/CPU0
:router(config-dhcpv6-pool)#
domain-name howie.com
Related Commands
|
|
pool (DHCP IPv6) |
Configures a Dynamic Host Configuration Protocol (DHCP) for the IPv6 server configuration information pool and enters DHCP for IPv6 pool configuration mode. |
duid
To define the Dynamic Host Configuration Protocol (DHCP) the unique identification (DUID) on a specified device, use the duid command in DHCP IPv6 configuration mode. To delete an administrative distance, use the no form of this command.
duid duid name
no duid duid name
Syntax Description
duid name |
IPv6 DHCP unique identifier (DUID) in hex format. The length of DUID word should be even. |
Defaults
DUID-LL as defined in Section 9.4 of RFC3315
Command Modes
DHCP IPv6 configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Use the duid command to configure the DHCP unique identifier on a specified device. Use the no form of this command to restore the default.
Examples
The following is an example of how to create an IPv6 DHCP unique identifier (DUID) of 0002000000090CC084D303000912 using the duid command:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6
RP/0/RP0/CPU0
:router(config-dhcpv6)#
duid 0002000000090CC084D303000912
Related Commands
|
|
dhcp ipv6 |
Enables Dynamic Host Configuration Protocol (DHCP) for IPv6 and enters DHCP IPv6 configuration mode. |
giaddr policy
To configure how Dynamic Host Configuration Protocol (DHCP) IPv4 Relay processes BOOTREQUEST packets that already contain a nonzero giaddr attribute, use the giaddr policy command in DHCP IPv4 profile relay configuration submode. To restore the default giaddr policy, use the no form of this command.
giaddr policy {replace | drop}
no giaddr policy {replace | drop}
Syntax Description
replace |
Replaces the existing giaddr value with a value that it generates. |
drop |
Drops the packet that has an existing nonzero giaddr value. |
Defaults
DHCP IPv4 relay retains the existing nonzero giaddr value.
Command Modes
DHCP IPv4 profile relay configuration
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
The giaddr policy command affects only the packets that are received from a DHCP IPv4 client that have a non-zero giaddr attribute.
Examples
The following example shows how to use the giaddr policy command:
RP/0/RP0/CPU0:router#
config
RP/0/RP0/CPU0:router(config)#
dhcp ipv4
RP/0/RP0/CPU0:router(config-dhcpv4)#
profile client relay
RP/0/RP0/CPU0:router(config-dhcpv4-relay-profile)#
giaddr policy drop
Related Commands
|
|
broadcast-flag policy check |
Configures a relay agent to only broadcast DHCP IPv4 BOOTREPLY messages to a client, if the DHCP IPv4 broadcast flag is set in the DHCP IPv4 header. |
dhcp ipv4 |
Enables DHCP for IPv4 and enters DHCP IPv4 configuration mode. |
helper-address |
Configures the DHCP relay agent to relay packets to a specific DHCP Server. |
interface (relay profile) |
Specifies a relay profile on an interface. |
profile relay |
Configures a relay profile for the DHCP IPv4 component. |
relay information check |
Configures a DHCP server to validate the relay agent information option in forwarded BOOTREPLY messages. |
relay information option |
Enables the system to insert a DHCP relay agent information option in forwarded BOOTREQUEST messages to a DHCP server. |
relay information option allow-untrusted |
Configures the DHCP component to not drop BOOTREQUEST messages that have the relay information option set and the giaddr set to zero. |
relay information policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a relay information option. |
helper-address
To configure the Dynamic Host Configuration Protocol (DHCP) IPv4 relay agent to relay BOOTREQUEST packets to a specific DHCP server, use the helper-address command in the DHCP IPv4 profile relay configuration submode. Use the no form of this command to clear the address. Up to eight helper addresses can be configured.
helper-address [vrf vrf name] address
no helper-address [vrf vrf name] address
Syntax Description
vrf vrf name |
(Optional) Specifies a particular VRF. |
address |
IP address in four part, dotted decimal format. |
Command Modes
DHCP IPv4 profile relay configuration
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following example shows how to set the helper-address for a VRF using the helper-address command:
RP/0/RP0/CPU0:router# config
RP/0/RP0/CPU0:router(config)# dhcp ipv4
RP/0/RP0/CPU0:router(config-dhcpv4)# profile client relay
RRP/0/RP0/CPU0:router(config-dhcpv4-relay-profile)# helper-address vrf v1 10.10.10.1
Related Commands
|
|
broadcast-flag policy check |
Configures a relay agent to only broadcast DHCP IPv4 BOOTREPLY messages to a client, if the DHCP IPv4 broadcast flag is set in the DHCP IPv4 header. |
dhcp ipv4 |
Enables Dynamic Host Configuration Protocol (DHCP) for IPv4 and enters DHCP IPv4 configuration mode. |
giaddr policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a nonzero giaddr attribute. |
interface (relay profile) |
Specifies a relay profile on an interface. |
profile relay |
Configures a relay profile for the DHCP IPv4 component. |
relay information check |
Configures a DHCP server to validate the relay agent information option in forwarded BOOTREPLY messages. |
relay information option |
Enables the system to insert a DHCP relay agent information option in forwarded BOOTREQUEST messages to a DHCP server. |
relay information option allow-untrusted |
Configures the DHCP component to not drop BOOTREQUEST messages that have the relay information option set and the giaddr set to zero. |
relay information policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a relay information option. |
vrf (relay profile) |
Specifies a relay profile on a VRF. |
interface (DHCP)
To enable Dynamic Host Configuration Protocol (DHCP) for IPv6 on an interface, use the interface command in DHCP IPv6 configuration mode. To disable DHCPv6 on an interface, use the no form of the command.
interface interface-type interface-instance {server | relay}
Syntax Description
interface-type |
Interface type. For more information, use the question mark (?) online help function. |
interface-instance |
Either a physical interface instance or a virtual interface instance as follows: •Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation. –rack: Chassis number of the rack. –slot: Physical slot number of the modular services card or line card. –module: Module number. A physical layer interface module (PLIM) is always 0. –port: Physical port number of the interface. Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0. Example: interface MgmtEth0/RP1/CPU0/0. •Virtual interface instance. Number range varies depending on interface type. For more information about the syntax for the router, use the question mark (?) online help function. |
server |
Enables service on the specified interface using the pool for prefix delegation. |
relay |
Specifies a destination address. |
Defaults
No default behavior or values
Command Modes
DHCP IPv6 configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following is an example of enabling the DHCP interface mode on a Packet over Sonet/SDH (POS) interface using the interface command:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6
RP/0/RP0/CPU0:router(config-dhcpv6)#
interface POS 0/5/0/0 relay
Related Commands
|
|
dhcp ipv6 |
Enables Dynamic Host Configuration Protocol (DHCP) for IPv6 and enters DHCP IPv6 configuration mode. |
show dhcp ipv6 interface |
Displays DHCP for IPv6 interface information. |
i
interface (relay profile)
To configure a relay profile on an interface, use the interface (relay profile) command in Dynamic Host Configuration Protocol (DHCP) IPv4 configuration mode. To disable this feature, use the no form of the command.
interface interface-type instance {none | relay}
no interface interface-type instance {none | relay}
Syntax Description
interface-type |
Interface type. For more information, use the question mark (?) online help function. |
instance |
Either a physical interface instance or a virtual interface instance. |
none |
Disables DHCP at the specified interface. |
relay |
Specifies a relay profile for the interface. |
Command Modes
DHCP IPv4 configuration
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following example shows how to configure a relay profile on an interface:
RP/0/RP0/CPU0:router#
config
RP/0/RP0/CPU0:router(config)#
dhcp ipv4
RP/0/RP0/CPU0:router(config-dhcpv4)#
interface pos 0/1/4/1
RP/0/RP0/CPU0:router(config-dhcpv4)#
interface pos 0/1/4/1 relay profile client
Related Commands
|
|
broadcast-flag policy check |
Configures a relay agent to only broadcast DHCP IPv4 BOOTREPLY messages to a client, if the DHCP IPv4 broadcast flag is set in the DHCP IPv4 header. |
dhcp ipv4 |
Enables Dynamic Host Configuration Protocol (DHCP) for IPv4 and enters DHCP IPv4 configuration mode. |
giaddr policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a nonzero giaddr attribute. |
helper-address |
Configures the DHCP relay agent to relay packets to a specific DHCP Server. |
profile relay |
Configures a relay profile for the DHCP IPv4 component. |
relay information check |
Configures a DHCP server to validate the relay agent information option in forwarded BOOTREPLY messages. |
relay information option |
Enables the system to insert a DHCP relay agent information option in forwarded BOOTREQUEST messages to a DHCP server. |
relay information option allow-untrusted |
Configures the DHCP component to not drop BOOTREQUEST messages that have the relay information option set and the giaddr set to zero. |
relay information policy |
Configures how a relay agent processes BOOTREQUEST messages that already containa relay information option. |
vrf (relay profile) |
Specifies a relay profile on a VRF. |
pd (prefix-delegation - DHCP IPv6 pool)
To specify a manually configured numeric prefix to be delegated to a specified client (and optionally a specified identity association for prefix delegation [IAPD] for that client), use the pd command in Dynamic Host Configuration Protocol (DHCP) IPv6 pool configuration mode. To remove the prefix, use the no form of this command.
pd ipv6-prefix/prefix-length client-DUID [iaid iaid] [lifetime]
Syntax Description
ipv6-prefix |
(Optional) Specified IPv6 prefix. This argument must be in the form documented in RFC 2373, where the address is specified in hexadecimal using 16-bit values between colons |
/prefix-length |
Length of the IPv6 prefix. A decimal value that indicates how many of the high-order contiguous bits of the address comprise the prefix (the network portion of the address). |
client-DUID |
The DHCP unique identifier (DUID) of the client to which the prefix is delegated. |
iaid iaid |
(Optional) Identity association identifier (IAID), which uniquely identifies an IAPD on the client. |
lifetime |
(Optional) Sets a length of time during which the requesting router is allowed to use the prefix. The following values can be used: •valid-seconds—Length of time, in seconds, that the prefix remains valid for the requesting router to use. •valid-seconds preferred-seconds—Length of time, in seconds, that the prefix remains valid for the requesting router to use, plus the length of time after which client should re-check that it still has the prefix. •at—Absolute point in time where the prefix is no longer valid and no longer preferred. •preferred-seconds—Length of time, in seconds, that the prefix remains preferred for the requesting router to use. •infinite—Unlimited lifetime. This value can be used in place of valid-seconds or preferred-seconds value. •valid-month valid-date valid-year valid-time—Fixed duration of time for hosts to remember router advertisements. The format used can be oct 24 2003 11:45 or 24 oct 2003 11:45. •preferred-month preferred-date preferred-year preferred-time—Fixed duration of time for hosts to remember router advertisements. The format used can be oct 24 2003 11:45 or 24 oct 2003 11:45. •at valid-timestamp—Absolute point in time (rather than duration) for the valid-timestamp.The prefix is valid up to valid-timestamp. •at valid-timestamp preferred-timestamp—Absolute point in time (rather than duration) for the valid-timestamp and preferred time-stamp. The client should confirm that it has the prefix after preferred-timestamp; however, the time-stamp is still valid up to valid-timestamp. |
Defaults
No manually configured prefix delegations exist.
Command Modes
DHCP IPv6 pool configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following is an example of the pd command in DHCP IPv6 pool configuration mode:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6 pool pool1
RP/0/RP0/CPU0
:router(config-dhcpv6-pool)#
pd 2001:420:10::/48 0002000000090CC084D303000912
Related Commands
|
|
pool (DHCP IPv6) |
Configures a Dynamic Host Configuration Protocol (DHCP) for the IPv6 server configuration information pool and enters DHCP for IPv6 pool configuration mode. |
pd (prefix-delegation - DHCP IPv6 interface)
To allow the identification of a client based on client connection to a specific interface, use the pd command in DHCP IPv6 interface server configuration mode. To remove the prefix, use the no form of this command.
pd ipv6-prefix/prefix-length [lifetime]
no pd ipv6-prefix/prefix-length [lifetime]
Syntax Description
ipv6-prefix |
(Optional) Specified IPv6 prefix. This argument must be in the form documented in RFC 2373, where the address is specified in hexadecimal using 16-bit values between colons |
/prefix-length |
Length of the IPv6 prefix. A decimal value that indicates how many of the high-order contiguous bits of the address comprise the prefix (the network portion of the address). |
lifetime |
(Optional) Sets a length of time over which the requesting router is allowed to use the prefix. The following values can be used: •valid-lifetime—The length of time, in seconds, that the prefix remains valid for the requesting router to use. •at—Specifies absolute points in time where the prefix is no longer valid and no longer preferred. •infinite—Indicates an unlimited lifetime. •preferred-lifetime—The length of time, in seconds, that the prefix remains preferred for the requesting router to use. •valid-month valid-date valid-year valid-time—A fixed duration of time for hosts to remember router advertisements. The format used can be oct 24 2003 11:45 or 24 oct 2003 11:45. •preferred-month preferred-date preferred-year preferred-time—A fixed duration of time for hosts to remember router advertisements. The format used can be oct 24 2003 11:45 or 24 oct 2003 11:45. |
Defaults
No manually configured prefix delegations exist.
Command Modes
DHCP IPv6 interface server configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following is an example of the pd command in DHCP IPv6 pool configuration mode:
RP/0/RP0/CPU0:router(config)# dhcp ipv6
RP/0/RP0/CPU0:router(config-dhcpv6)# pool pool1
RP/0/RP0/CPU0:router(config-dhcpv6-pool)# exit
RP/0/RP0/CPU0:router(config-dhcpv6)# interface POS 0/5/0/0 server
RP/0/RP0/CPU0:router(config-dhcpv6-if)# pd 2001:420:10::/48
RP/0/RP0/CPU0:router(config-dhcpv6-if)# pool pool1
Related Commands
pool (DHCP IPv6)
To configure a Dynamic Host Configuration Protocol (DHCP) for the IPv6 server configuration information pool and enter DHCP for IPv6 pool configuration mode, use the pool command in either DHCP IPv6 configuration mode or DHCP IPv6 interface relay configuration mode. To delete a DHCP for IPv6 pool, use the no form of this command.
pool poolname
no pool poolname
Syntax Description
poolname |
User-defined name for the local prefix pool. The pool name can be a symbolic string (such as "Engineering") or an integer (such as 0). |
Defaults
No DHCP for IPv6 pools are configured.
Command Modes
DHCP IPv6 configuration
DHCP IPv6 interface server configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Use the pool command to create a DHCP for IPv6 server configuration information pool. When the pool command is enabled, the configuration mode changes to DHCP for IPv6 pool configuration mode. In this mode, the administrator can configure pool parameters, such as prefixes to be delegated and Domain Name System (DNS) servers.
Once the DHCP for IPv6 configuration information pool has been created, use the server command to associate the pool with a server on an interface.
Examples
The following example show how to enter pool configuration mode using the pool command:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6
RP/0/RP0/CPU0
:router
(config-dhcpv6)# pool pool1
RP/0/RP0/CPU0
:router
(config-dhcpv6-pool)#
Related Commands
|
|
dhcp ipv6 |
Enables Dynamic Host Configuration Protocol (DHCP) for IPv6 and enters DHCP IPv6 configuration mode. |
show dhcp ipv6 pool |
Displays DHCP for IPv6 configuration information pool information. |
preference
To configure the preference value, use the preference command in DHCP IPv6 interface server configuration mode. To disable the preference value, use the no form of the command.
preference preference value
no preference
Syntax Description
preference value |
Preference value carried in the preference option in the advertise message sent by the server. The range is from 0 to 255. |
Defaults
The preference value defaults to zero.
Command Modes
DHCP IPv6 interface server configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
The preference command configures a preference value. If the preference value is configured and it is not 0, the server adds a preference option to carry the preference value for the advertise message to a client to affect the selection of a server by client.
Examples
The following is an example of the preference command:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6
RP/0/RP0/CPU0
:router
(config-dhcpv6)# interface pos 0/5/0/0 server
RP/0/RP0/CPU0
:router
(config-dhcpv6-if)# preference 10
Related Commands
profile relay
To configure a relay profile for the Dynamic Host Configuration Protocol (DHCP) IPv4 component and to enter the profile relay mode, use the pofile relay command in DHCP IPv4 configuration mode. To disable this feature and exit the profile relay mode, use the no form of this command.
profile profile name relay
no profile profile name relay
Syntax Description
profile name |
Name that uniquely identifies the relay profile. |
Command Modes
DHCP IPv4 configuration
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following example shows how to use the profile relay command:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv4
RP/0/RP0/CPU0
:router
(config-dhcpv4)# profile client relay
Related Commands
|
|
broadcast-flag policy check |
Configures a relay agent to only broadcast DHCP IPv4 BOOTREPLY messages to a client, if the DHCP IPv4 broadcast flag is set in the DHCP IPv4 header. |
dhcp ipv4 |
Enables DHCP for IPv4 and enters DHCP IPv4 configuration mode. |
giaddr policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a nonzero giaddr attribute. |
helper-address |
Configures the DHCP relay agent to relay packets to a specific DHCP Server. |
interface (relay profile) |
Specifies a relay profile on an interface. |
relay information check |
Configures a DHCP server to validate the relay agent information option in forwarded BOOTREPLY messages. |
relay information option |
Enables the system to insert a DHCP relay agent information option in forwarded BOOTREQUEST messages to a DHCP server. |
relay information option allow-untrusted |
Configures the DHCP component to not drop BOOTREQUEST messages that have the relay information option set and the giaddr set to zero. |
relay information policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a relay information option. |
vrf (relay profile) |
Specifies a relay profile on a VRF. |
rapid-commit
To enable clients that specify the Rapid Commit option in their Solicit messages to receive immediate address assignment Reply messages, use the rapid-commit command in Dynamic Host Configuration Protocol (DHCP) IPv6 interface server mode. To disable DHCP for IPv6 service on an interface, use the no form of this command.
rapid-commit
no rapid-commit
Syntax Description
This command has no arguments or keywords.
Defaults
Rapid commit is disabled.
Command Modes
DHCP IPv6 interface server configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
The rapid-commit command enables or disables rapid commit. If enabled, the DHCPv6 server uses the two-message exchange for prefix delegation and other configuration. If a client has included a rapid commit option in the solicit message and rapid-commit is enabled for the server, the server responds to the solicit message with a reply message. If rapid-commit is not enabled, then normal four-message exchange is done even if the clients specifies the rapid commit option.
Examples
The following is an example of the rapid-commit command:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6
RP/0/RP0/CPU0
:router
(config-dhcpv6)# interface pos 0/5/0/0 server
RP/0/RP0/CPU0
:router
(config-dhcpv6-if)# rapid-commit
Related Commands
relay information check
To configure a Dynamic Host Configuration Protocol (DHCP) IPv4 Relay to validate the relay agent information option in forwarded BOOTREPLY messages, use the relay information check command in DHCP IPv4 relay profile configuration submode. To disable this feature, use the no form of this command.
relay information check
no relay information check
Syntax Description
This command has no arguments or keywords.
Defaults
DHCP validates the relay agent information option.
Command Modes
DHCP IPv4 relay profile configuration
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
|
|
ip-services |
read, write |
basic-services |
read, write |
Examples
The following example shows how to use the relay information check command:
RP/0/RP0/CPU0:router# config
RP/0/RP0/CPU0:router(config)# dhcp ipv4
RP/0/RP0/CPU0:router(config-dhcpv4)# profile client relay
RP/0/RP0/CPU0:router(config-dhcpv4-relay-profile)# relay information check
Related Commands
|
|
broadcast-flag policy check |
Configures a relay agent to only broadcast DHCP IPv4 BOOTREPLY messages to a client, if the DHCP IPv4 broadcast flag is set in the DHCP IPv4 header. |
dhcp ipv4 |
Enables DHCP for IPv4 and enters DHCP IPv4 configuration mode. |
giaddr policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a nonzero giaddr attribute. |
helper-address |
Configures the DHCP relay agent to relay packets to a specific DHCP Server. |
profile relay |
Configures a relay profile for the DHCP IPv4 component. |
relay information option |
Enables the system to insert a DHCP relay agent information option in forwarded BOOTREQUEST messages to a DHCP server. |
relay information option allow-untrusted |
Configures the DHCP component to not drop BOOTREQUEST messages that have the relay information option set and the giaddr set to zero. |
relay information policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a relay information option. |
vrf (relay profile) |
Specifies a relay profile on a VRF. |
relay information option
To configure Dynamic Host Configuration Protocol (DHCP) IPv4 Relay to insert relay agent information option in forwarded BOOTREQUEST messages to a DHCP server, use the relay information option command in DHCP IPv4 relay profile configuration submode. To disable inserting relay information into forwarded BOOTREQUEST messages, use the no form of this command.
relay information option
no relay information option
Syntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values
Command Modes
DHCP IPv4 relay profile configuration
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
The relay information option command automatically adds the circuit identifier suboption and the remote ID suboption to the DHCP relay agent information option.
The relay information option command enables a DHCP server to identify the user (for example, cable access router) sending the request and initiate appropriate action based on this information. By default, DHCP does not insert relay information.
|
|
ip-services |
read, write |
basic-services |
read, write |
Examples
The following example shows how to use the relay information option command:
RP/0/RP0/CPU0:router#
config
RP/0/RP0/CPU0:router(config)#
dhcp ipv4
RP/0/RP0/CPU0:router(config-dhcpv4)#
profile client relay
RP/0/RP0/CPU0:router(config-dhcpv4-relay-profile)#
relay information option
Related Commands
|
|
broadcast-flag policy check |
Configures a relay agent to only broadcast DHCP IPv4 BOOTREPLY messages to a client, if the DHCP IPv4 broadcast flag is set in the DHCP IPv4 header. |
dhcp ipv4 |
Enables DHCP for IPv4 and enters DHCP IPv4 configuration mode. |
giaddr policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a nonzero giaddr attribute. |
helper-address |
Configures the DHCP relay agent to relay packets to a specific DHCP Server. |
profile relay |
Configures a relay profile for the DHCP IPv4 component. |
relay information check |
Configures a DHCP server to validate the relay agent information option in forwarded BOOTREPLY messages. |
relay information option allow-untrusted |
Configures the DHCP component to not drop BOOTREQUEST messages that have the relay information option set and the giaddr set to zero. |
relay information policy |
Configures how a relay agent processes BOOTREQUEST messages that already containa relay information option. |
vrf (relay profile) |
Specifies a relay profile on a VRF. |
relay information option allow-untrusted
To configure the Dynamic Host Configuration Protocol (DHCP) IPv4 Relay not to discard BOOTREQUEST packets that have the relay information option set and the giaddr set to zero, use the relay information option allow-untrusted command in DHCP IPv4 relay profile configuration submode.To restore the default behavior, which is to discard the BOOTREQUEST packets that have the relay information option and the giaddr set to zero, use the no form of this command.
relay information option allow-untrusted
no relay information option allow-untrusted
Syntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values
Command Modes
DHCP IPv4 relay profile configuration
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
According to RFC 3046, relay agents (and servers) receiving a DHCP packet from an untrusted circuit with giaddr set to zero but with a relay agent information option already present in the packet shall discard the packet and increment an error count. This configuration prevents the server or relay from dropping the DHCP message.
|
|
ip-services |
read, write |
basic-services |
read, write |
Examples
The following example shows how to use the relay information option allow-untrusted command:
RP/0/RP0/CPU0:router#
config
RP/0/RP0/CPU0:router(config)#
dhcp ipv4
RP/0/RP0/CPU0:router(config-dhcpv4)#
profile client relay
RP/0/RP0/CPU0:router(config-dhcpv4-relay-profile)#
relay information option allow-untrusted
Related Commands
|
|
broadcast-flag policy check |
Configures a relay agent to only broadcast DHCP IPv4 BOOTREPLY messages to a client, if the DHCP IPv4 broadcast flag is set in the DHCP IPv4 header. |
dhcp ipv4 |
Enables DHCP for IPv4 and enters DHCP IPv4 configuration mode. |
giaddr policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a nonzero giaddr attribute. |
helper-address |
Configures the DHCP relay agent to relay packets to a specific DHCP Server. |
profile relay |
Configures a relay profile for the DHCP IPv4 component. |
relay information check |
Configures a DHCP server to validate the relay agent information option in forwarded BOOTREPLY messages. |
relay information option |
Enables the system to insert a DHCP relay agent information option in forwarded BOOTREQUEST messages to a DHCP server. |
relay information policy |
Configures how a relay agent processes BOOTREQUEST messages that already containa relay information option. |
vrf (relay profile) |
Specifies a relay profile on a VRF. |
relay information policy
To configure how the Dynamic Host Configuration Protocol (DHCP) IPv4 Relay processes BOOTREQUEST packets that already contain a relay information option, use the relay information policy command in DHCP IPv4 profile relay configuration submode. To restore the default relay information policy, use the no form of this command.
relay information policy {drop | keep}
no relay information policy {drop | keep}
Syntax Description
drop |
Directs the DHCP IPv4 Relay to discard BOOTPREQUEST packets with the exsiting relay information option. |
keep |
Directs the DHCP IPv4 Realy not to discard a BOOTPREQUEST packet that is received with an existing relay information option and to keep the existing relay information option value. |
Defaults
The DHCP IPv4 Relay does not discard a BOOTPREQUEST packet that has an existing relay information option and the existing relay information option value is replaced.
Command Modes
DHCP IPv4 relay profile configuration
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
|
|
ip-services |
read, write |
basic-services |
read, write |
Examples
The following is an example of the relay information policy command:
RP/0/RP0/CPU0:router#
config
RP/0/RP0/CPU0:router(config)#
dhcp ipv4
RP/0/RP0/CPU0:router(config-dhcpv4)#
profile client relay
RP/0/RP0/CPU0:router(config-dhcpv4-relay-profile)#
relay information policy keep
Related Commands
|
|
broadcast-flag policy check |
Configures a relay agent to only broadcast DHCP IPv4 BOOTREPLY messages to a client, if the DHCP IPv4 broadcast flag is set in the DHCP IPv4 header. |
dhcp ipv4 |
Enables DHCP for IPv4 and enters DHCP IPv4 configuration mode. |
giaddr policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a nonzero giaddr attribute. |
helper-address |
Configures the DHCP relay agent to relay packets to a specific DHCP Server. |
interface (relay profile) |
Specifies a relay profile on an interface. |
profile relay |
Configures a relay profile for the DHCP IPv4 component. |
relay information check |
Configures a DHCP server to validate the relay agent information option in forwarded BOOTREPLY messages. |
relay information option |
Enables the system to insert a DHCP relay agent information option in forwarded BOOTREQUEST messages to a DHCP server. |
relay information option allow-untrusted |
Configures the DHCP component to not drop BOOTREQUEST messages that have the relay information option set and the giaddr set to zero. |
vrf (relay profile) |
Specifies a relay profile on a VRF. |
show dhcp ipv4 relay profile
To display Dynamic Host Configuration Protocol (DHCP) relay agent status, use the show dhcp ipv4 relay profile command in EXEC mode.
show dhcp ipv4 relay profile
Syntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values
Command Modes
EXEC
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
This command displays the relay profiles created for DHCP IPv4.
Examples
The following is sample output from the show dhcp ipv4 relay profile command:
RP/0/RSP0/CPU0:router# show dhcp ipv4 relay profile
--------------------------
Related Commands
show dhcp ipv4 relay profile name
To display Dynamic Host Configuration Protocol (DHCP) relay agent status, specific to a relay profile, use the show dhcp ipv4 relay profile name command in EXEC mode.
show dhcp ipv4 relay profile name name
Syntax Description
name |
Name that uniquely identifies the relay profile. |
Defaults
No default behavior or values
Command Modes
EXEC
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following is sample output from the show dhcp ipv4 relay profile name command:
RP/0/RSP1/CPU0:router# show dhcp ipv4 relay profile name r1
DHCP IPv4 Relay Profile r1:
Information Option: Disabled
Information Option Allow Untrusted: Disabled
Information Option Policy: Replace
Information Option Check: Disabled
Broadcast-flag Policy: Ignore
show dhcp ipv4 relay statistics
To display the Dynamic Host Configuration Protocol (DHCP) IPv4 relay information for VPN routing and forwarding (VRF) instances, use the show dhcp ipv4 relay statistics command in EXEC mode.
show dhcp [vrf {vrf-name | default}] ipv4 relay statistics
Syntax Description
vrf vrf-name |
(Optional) Name that uniquely identifies the VRF. |
default |
(Optional) Displays the relay statistics information for the default VRF. |
Defaults
No default behavior or values
Command Modes
EXEC
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following is sample output from the show dhcp ipv4 relay statistics command:
RP/0/RSP0/CPU0:router# show dhcp ipv4 relay statistics
---------------------------------------------------------------------------------------
show dhcp ipv6
To display the Dynamic Host Configuration Protocol (DHCP) unique identifier (DUID) on a specified device, use the show dhcp ipv6 command in EXEC mode.
show dhcp ipv6
Syntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values
Command Modes
EXEC
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following is sample output from the show dhcp ipv6 command:
RP/0/RP0/CPU0:router: show dhcp ipv6
This device's DHCPv6 unique identifier(DUID): 000300010002FCA5DC1C
show dhcp ipv6 binding
To display automatic client bindings from the Dynamic Host Configuration Protocol (DHCP) for IPv6 server binding table, use the show ipv6 dhcp binding command in EXEC mode.
show dhcp ipv6 binding [ipv6-address]
Syntax Description
ipv6-address |
(optional) IPv6 address. The ipv6-address argument must be in the form documented in RFC 2373, where the address is specified in hexadecimal using 16-bit values between colons. |
Defaults
No default behavior or values
Command Modes
EXEC
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
The show dhcp ipv6 binding command displays all automatic client bindings from the DHCP for IPv6 server binding table if the ipv6-address argument is not specified. When the ipv6-address argument is specified, only the binding for the specified client is displayed.
Examples
The following is sample output from the show dhcp ipv6 binding displaying all automatic client bindings from the DHCPv6 database. The ipv6 address argument is not specified:
RP/0/RP0/CPU0:router: show dhcp ipv6 binding
Client: FE80::202:FCFF:FEA5:DC39 (Ethernet2/1)
DUID: 000300010002FCA5DC1C
IA PD: IA ID 0x00040001, T1 0, T2 0
Prefix: 3FFE:C00:C18:11::/68
preferred lifetime 180, valid lifetime 12345
expires at Nov 08 2002 02:24 PM (12320 seconds)
Client: FE80::202:FCFF:FEA5:C039 (Ethernet2/1)
DUID: 000300010002FCA5C01C
IA PD: IA ID 0x00040001, T1 0, T2 0
Prefix: 3FFE:C00:C18:1::/72
preferred lifetime 240, valid lifetime 54321
expires at Nov 09 2002 02:02 AM (54246 seconds)
Prefix: 3FFE:C00:C18:2::/72
preferred lifetime 300, valid lifetime 54333
expires at Nov 09 2002 02:03 AM (54258 seconds)
Prefix: 3FFE:C00:C18:3::/72
preferred lifetime 280, valid lifetime 51111
expires at Nov 09 2002 01:09 AM (51036 seconds)
Table 33 describes the significant fields shown in the display.
Table 33 show dhcp ipv6 binding Command Field Descriptions
|
|
DUID |
DHCP IPv6 unique identifier |
IA PD |
Identity Association for Prefix Delegation |
Prefix |
Prefixes delegated to the IAPD on the specified client |
show dhcp ipv6 database
To display the Dynamic Host Configuration Protocol (DHCP) for IPv6 binding database agent information, use the show dhcp ipv6 database command in EXEC mode.
show dhcp ipv6 database [agent-URL]
Syntax Description
agent-URL |
(Optional) Flash, NVRAM, FTP, TFTP, or Remote Copy Protocol (RCP) uniform resource locator. |
Defaults
No default behavior or values
Command Modes
EXEC
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Each permanent storage to which the binding database is saved is called the database agent. An agent can be configured using the dhcp ipv6 database command. Supported database agents include FTP and TFTP servers, RCP, Flash file system, and NVRAM.
The show dhcp ipv6 database command displays DHCP for IPv6 binding database agent information. If the agent-URL argument is specified, only the specified agent is displayed. If the agent-URL argument is not specified, all database agents are shown.
Examples
The following is sample output from the show dhcp ipv6 database command:
RP/0/RP0/CPU0:router: show dhcp ipv6 database
Database agent tftp://172.19.216.133/db.tftp:
write delay: 69 seconds, transfer timeout: 300 seconds
last written at Jan 09 2003 01:54 PM,
write timer expires in 56 seconds
last read at Jan 06 2003 05:41 PM
successful write times 3172
Database agent nvram:/dhcpv6-binding:
write delay: 60 seconds, transfer timeout: 300 seconds
last written at Jan 09 2003 01:54 PM,
write timer expires in 37 seconds
successful write times 3325
Database agent flash:/dhcpv6-db:
write delay: 82 seconds, transfer timeout: 3 seconds
last written at Jan 09 2003 01:54 PM,
write timer expires in 50 seconds
successful write times 2220
Table 34 describes the significant fields shown in the display.
Table 34 show dhcp ipv6 database Command Field Descriptions
|
|
Database agent |
Specifies the database agent. |
Write delay |
The amount of time (in seconds) to wait before updating the database. |
transfer timeout |
Specifies how long (in seconds) the DHCP server should wait before aborting a database transfer. Transfers that exceed the timeout period are aborted. |
Last written |
The last date and time bindings were written to the file server. |
Write timer expires... |
The length of time, in seconds, before the write timer expires |
Last read |
The last date and time bindings were read from the file server. |
Successful/failed read times |
The number of successful or failed read times. |
Successful/failed write times |
The number of successful or failed write times. |
Related Commands
|
|
database |
Configures a DHCP for IPv6 binding database agent. |
show dhcp ipv6 interface
To display Dynamic Host Configuration Protocol (DHCP) for IPv6 interface information, use the show dhcp ipv6 interface command in EXEC mode.
show dhcp ipv6 interface interface-type interface-instance
Syntax Description
interface-type |
Interface type. For more information, use the question mark (?) online help function. |
interface-instance |
Either a physical interface instance or a virtual interface instance as follows: •Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation. –rack: Chassis number of the rack. –slot: Physical slot number of the modular services card or line card. –module: Module number. A physical layer interface module (PLIM) is always 0. –port: Physical port number of the interface. Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0. Example: interface MgmtEth0/RP1/CPU0/0. •Virtual interface instance. Number range varies depending on interface type. For more information about the syntax for the router, use the question mark (?) online help function. |
Defaults
No default behavior or values
Command Modes
EXEC
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
If no interfaces are specified, all interfaces on which DHCP for IPv6 (client or server) is enabled are shown. If an interface is specified, only information about the specified interface is displayed.
Examples
The following is sample output from the show dhcp ipv6 interface command when an interface is not specified:
RP/0/RP0/CPU0:router: show dhcp ipv6 interface
POS 0/5/0/0 is in server mode
Hint from client: ignored
Table 35 describes the significant fields shown in the display.
Table 35 show dhcp ipv6 interface Command Field Descriptions
|
|
POS 0/5/0/0 is in server/relay mode |
Displays whether the specified interface is in server or relay mode. |
Using pool |
Name of the pool used by the interface. |
Preference value |
Advertised (or default of 0) preference value for the indicated server. |
Hint from client |
Displays whether the allow-hint has been enabled on the interface. |
Rapid-Commit |
Displays whether the rapid-commit keyword has been enabled on the interface. |
Related Commands
show dhcp ipv6 pool
To display Dynamic Host Configuration Protocol (DHCP) for IPv6 configuration information pool information, use the show ipv6 dhcp pool command in EXEC mode.
show dhcp ipv6 pool [pool-name]
Syntax Description
pool-name |
(Optional) User-defined name for the local prefix pool. The pool name can be a symbolic string (such as "Engineering") or an integer (such as 0). |
Defaults
No default behavior or values
Command Modes
EXEC
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Use the dhcp ipv6 pool command to create a configuration information pool, and use the dhcp ipv6 server command to associate the configuration information pool with a server on an interface.
The show dhcp ipv6 pool command displays DHCP for IPv6 configuration information pool information. If the poolname argument is specified, only information on the specified pool is displayed. If the poolname argument is not specified, all pools are shown.
Examples
The following is sample output from the show dhcp ipv6 pool command. If pool-name is not specified, all pools are shown; otherwise, only the named pool is displayed.
RP/0/RP0/CPU0:router: show dhcp ipv6 pool
Binding for client 000300010002FCA5C01C
Prefix: 3FFE:C00:C18:3::/72
preferred lifetime 604800, valid lifetime 2592000
IA PD: IA ID not specified; being used by 00040001
Prefix: 3FFE:C00:C18:1::/72
preferred lifetime 240, valid lifetime 54321
Prefix: 3FFE:C00:C18:2::/72
preferred lifetime 300, valid lifetime 54333
Prefix: 3FFE:C00:C18:3::/72
preferred lifetime 280, valid lifetime 51111
Table 36 describes the significant fields shown in the display.
Table 36 show ipv6 dhcp pool Command Field Descriptions
|
|
DHCPv6 pool |
The name of the pool. |
IA PD |
Identity association for prefix delegation (IA PD), which is a collection of prefixes assigned to a client. |
Prefix |
Prefixes to be delegated to the indicated IAPD on the specified client. |
preferred lifetime, valid lifetime |
Lifetimes associated with the prefix statically assigned to the specified client. |
DNS server |
IPv6 addresses of the DNS servers. |
Domain name |
Displays the DNS domain search list. |
Active clients |
Total number of active clients. |
sip address
To configure a Session Initiation Protocol (SIP) server IPv6 address to be returned in the SIP server's IPv6 address list option to clients, use the sip address command in Dynamic Host Configuration Protocol (DHCP) IPv6 pool configuration mode. To disable this feature, use the no form of this command.
sip address ipv6 address
no sip address ipv6 address
Syntax Description
ipv6-address |
IPv6 address. The ipv6-address argument must be in the form documented in RFC 2373, where the address is specified in hexadecimal using 16-bit values between colons. |
Defaults
No default behavior or values
Command Modes
DHCP IPv6 pool configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
For the Dynamic Host Configuration Protocol (DHCP) for IPv6 server to obtain prefixes from RADIUS servers, the user must also configure the authorization, authentication, and accounting (AAA) client and PPP on the router. For information on how to configure the AAA client and PPP, see the "Implementing ADSL and Deploying Dial Access for IPv6" module of the Cisco IOS XR System Security Command Reference.
The sip address command configures a SIP server IPv6 address to be returned in the SIP server's IPv6 address list option to clients. To configure multiple SIP server addresses, issue this command multiple times. The new addresses do not overwrite old ones.
Examples
The following example shows how to configure the SIP address using the sip-address command:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6 pool pool1
RP/0/RP0/CPU0
:router(config-dhcpv6-pool)#
sip address 10:10::10
Related Commands
|
|
pool (DHCP IPv6) |
Configures a Dynamic Host Configuration Protocol (DHCP) for the IPv6 server configuration information pool and enters DHCP for IPv6 pool configuration mode. |
sip domain-name
To configure a Session Initiation Protocol (SIP) server domain name to be returned in the SIP server's domain name list option to clients, use the sip domain-name command in Dynamic Host Configuration Protocol (DHCP) IPv6 pool configuration mode. To disable this feature, use the no form of this command.
sip domain-name domain-name
no sip domain-name domain-name
Syntax Description
domain-name |
Domain name for a DHCP for IPv6 client. |
Defaults
No default behavior or values
Command Modes
DHCP IPv6 pool configuration
Command History
|
|
Release 3.4.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.5.0 |
No modification. |
Release 3.6.0 |
No modification. |
Release 3.7.0 |
No modification. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
For the Dynamic Host Configuration Protocol (DHCP) for IPv6 server to obtain prefixes from RADIUS servers, the user must also configure the authorization, authentication, and accounting (AAA) client and PPP on the router. For information on how to configure the AAA client and PPP, see the "Implementing ADSL and Deploying Dial Access for IPv6" module of the Cisco IOS XR System Security Command Reference.
The sip domain-name command configures a SIP server domain name to be returned in the SIP server's domain name list option to clients. To configure multiple SIP server domain names, issue this command multiple times. The new domain names do not overwrite old ones.
Examples
The following example shows how to configure the SIP address using the sip domain-name command:
RP/0/RP0/CPU0
:router(config)#
dhcp ipv6 pool pool1
RP/0/RP0/CPU0
:router(config-dhcpv6-pool)#
sip domain-name domain1.com
Related Commands
|
|
pool (DHCP IPv6) |
Configures a Dynamic Host Configuration Protocol (DHCP) for the IPv6 server configuration information pool and enters DHCP for IPv6 pool configuration mode. |
vrf (relay profile)
To configure a relay profile on a VPN routing and forwarding (VRF) instance, use the vrf (relay profile) command in Dynamic Host Configuration Protocol (DHCP) IPv4 configuration mode. To disable this feature, use the no form of this command.
vrf {vrf name | default | all}
no vrf {vrf name | default | all}
Syntax Description
vrf name |
User-defined name for the VRF. |
default |
Specifies a profile for the default VRF. |
all |
Specifies a profile for all VRFs. |
Defaults
No default behavior or values
Command Modes
DHCP IPv4 configuration
Command History
|
|
Release 3.7.0 |
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router. |
Release 3.8.0 |
No modification. |
Usage Guidelines
To use this command, your Cisco IOS XR software system administrator must assign you to a user group associated with a task group that includes the corresponding command task IDs. If you need assistance with your task group assignment, contact your system administrator.For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of Cisco IOS XR System Security Configuration Guide.
Examples
The following example shows how to set the relay profile for all VRFs:
RP/0/RP0/CPU0:router#
config
RP/0/RP0/CPU0:router(config)#
dhcp ipv4
RP/0/RP0/CPU0:router(config-dhcpv4)#
vrf all
Related Commands
|
|
dhcp ipv4 |
Enables DHCP for IPv4 and enters DHCP IPv4 configuration mode. |
giaddr policy |
Configures how a relay agent processes BOOTREQUEST messages that already contain a nonzero giaddr attribute. |
helper-address |
Configures the DHCP relay agent to relay packets to a specific DHCP Server. |
profile relay |
Configures a relay profile for the DHCP IPv4 component. |
relay information check |
Configures a DHCP server to validate the relay agent information option in forwarded BOOTREPLY messages. |
relay information option |
Enables the system to insert a DHCP relay agent information option in forwarded BOOTREQUEST messages to a DHCP server. |
relay information option allow-untrusted |
Configures the DHCP component to not drop BOOTREQUEST messages that have the relay information option set and the giaddr set to zero. |
relay information policy |
Configures how a relay agent processes BOOTREQUEST messages that already containa relay information option. |