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Catalyst 6500 Series Command Reference, 7.6
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Quick Links to Catalyst 6500 Series Switch and ROM Monitor Commands
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Index
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Preface
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Command-Line Interfaces
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alias to boot
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cd to clear mls exclude protocol
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clear mls multicast statistics to clear vtp pruneeligible
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clear vtp statistics to disable
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disconnect to enable
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Format to Ping
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pwd to reset-switch
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restore counters to set crypto key rsa
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set default portstatus to set logging timestamp
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set logout to set port arp-inspection
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set port auxiliaryvlan to set rcp username
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set rgmp to set spantree portvlanpri
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set spantree priority to set trunk
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set udld to set vtp pruneeligible
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show accounting to show dot1q-all-tagged
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show dot1x to show ip alias
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show ip dns to show ip permit
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show ip route to show pbf-map
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show port to show snmp
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show snmp access to show tech-support
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show test to show users
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show version to squeeze
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stack to write tech-support
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Acronyms
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Table Of Contents
set mls bridged-flow-statistics
set mls cef per-prefix-statistics
22set logout
To set the number of minutes until the system disconnects an idle session automatically, use the set logout command.
set logout timeout
Syntax Description
timeout
Number of minutes until the system disconnects an idle session automatically; valid values are from 0 to 10,000 minutes.
Defaults
The default is 20 minutes.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
Setting the value to 0 disables the automatic disconnection of idle sessions.
The show tech-support command may time out if the configuration file output takes longer to display than the configured session timeout time. If this happens, enter a set logout timeout value of 0 to disable automatic disconnection of idle sessions or enter a longer timeout value.
Examples
This example shows how to set the number of minutes until the system disconnects an idle session automatically:
Console> (enable) set logout 20Sessions will be automatically logged out after 20 minutes of idle time.Console> (enable)This example shows how to disable the automatic disconnection of idle sessions:
Console> (enable) set logout 0Sessions will not be automatically logged out.Console> (enable)Related Commands
set mls agingtime
To specify the MLS aging time of shortcuts to an MLS entry in the Catalyst 6500 series switches, use the set mls agingtime command.
set mls agingtime [ip | ipx] {agingtime}
set mls agingtime fast {fastagingtime} {pkt_threshold}
set mls agingtime long-duration {longagingtime}
Syntax Description
Defaults
The default agingtime is 256 seconds. The default fastagingtime is 0, no fast aging. The default pkt_threshold is 0. The default longagingtime is 1920.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
If you use the ip keyword, you are specifying a shortcut for IP MLS. If you use the ipx keyword, you are specifying a shortcut for IPX MLS.
If you enter 0 for the fastagingtime value, fast aging is disabled.
If you do not specify fastagingtime or pkt_threshold, the default value is used.
If you enter any of the set mls commands on a Catalyst 6500 series switch without MLS, this warning message displays:
MLS not supported on feature card.The agingtime value can be configured as multiples of 8 in the range of 8 to 2024 seconds. The values are picked up in numerical order to achieve efficient aging. Any value for agingtime that is not a multiple of 8 seconds is adjusted to the closest one. For example, 65 is adjusted to 64, while 127 is adjusted to 128.
The fastagingtime value can be configured as multiples of 8 to any value in the range of 0 to 128 seconds.
The default pkt_threshold value is 0. It can be configured as 0, 1, 3, 7, 15, 31, 63, or 127 (the values picked for efficient aging). If you do not configure fastagingtime exactly the same for these values, it adjusts to the closest value. A typical value for fastagingtime and pkt_threshold is 32 seconds and 0 packet, respectively. (It means no packet switched within 32 seconds after the entry was created.)
The agingtime value applies to an MLS entry that has no more than pkt_threshold packets switched within fastagingtime seconds after it is created. A typical example is the MLS entry destined to/sourced from a DNS or TFTP server. This entry may never be used again once it is created. For example, only one request goes to a server and one reply returns from the server, and then the connection is closed.
The agingtime fast option is used to purge entries associated with very short flows, such as DNS and TFTP.
Keep the number of MLS entries in the MLS cache below 32,000. If the number of MLS entries exceed 32,000, some flows (less than 1 percent) are sent to the router.
To keep the number of MLS cache entries below 32,000, decrease the aging time up to 8 seconds. If your switch has a lot of short flows used by only a few packets, then you can use fast aging.
If cache entries continue to exceed 32,000, decrease the normal aging time in 64-second increments from the 256-second default.
You can force an active flow to age out by entering the set mls agingtime long-duration command. You can specify the aging time of the active flow in the range of 64 to 1920 seconds in increments of 64.
Examples
These examples show how to set the aging time:
Console> (enable) set mls agingtime 512IP Multilayer switching aging time set to 512 seconds.Console> (enable)Console> (enable) set mls agingtime ipx 512IPX Multilayer switching aging time set to 512Console> (enable)This example shows how to set the fast aging time:
Console> (enable) set mls agingtime fast 32 0Multilayer switching fast aging time set to 32 seconds for entries with no more than 0 packet switched.Console> (enable)This example shows how to set the aging time for active flows:
Console> (enable) set mls agingtime long-duration 128Multilayer switching agingtime set to 128 seconds for long duration flowsConsole> (enable)Related Commands
clear mls statistics entry
show mlsset mls bridged-flow-statistics
To enable or disable statistics for bridged flows for specified VLANs, use the set mls bridged-flow-statistics command.
set mls bridged-flow-statistics {enable | disable} {vlanlist}
Syntax Description
Defaults
By default, bridged-flow statistics is disabled on all VLANs.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
You can enter one or multiple VLANs. The following examples are valid VLAN lists: 1; 1,2,3; 1-3,7.
Bridged flows are exported through NDE when bridged flow statistics is enabled.
Examples
This example shows how to enable bridged-flow statistics on the specified VLANs:
Console> (enable) set mls bridged-flow-statistics enable 1-21Netflow statistics is enabled for bridged packets on vlan(s) 1-21.Console> (enable)Related Commands
show mls nde
show mls entry
show mls statisticsset mls cef load-balance
To include or exclude Layer 4 ports in a load-balancing hash, use the set mls cef load-balance command.
set mls cef load-balance {full | source-destination-ip}
Syntax Description
full
Bases the hash on Layer 4 ports and source and destination IP addresses.
source-destination-ip
Bases the hash on source and destination IP addresses.
Defaults
By default, the load-balancing hash is based on source and destination IP addresses.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
When multiple paths are available to reach a destination, the new hash is used to choose the path to be used for forwarding.
Examples
This example shows how to base the hash on Layer 4 ports and source and destination IP addresses:
Console> (enable) set mls cef load-balance fullConsole> (enable)This example shows how to base the hash on source and destination IP addresses:
Console> (enable) set mls cef load-balance source-destination-ipConsole> (enable)Related Commands
set mls cef per-prefix-statistics
To set MLS CEF per-prefix statistics mode, use the set mls cef per-prefix statistics command.
set mls cef per-prefix statistics {enable | disable}
Syntax Description
enable
Enables per-prefix statistics for all FIB entries
disable
Disables per-prefix statistics for all FIB entries.
Defaults
MLS CEF per-prefix statistics mode is enabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
When the set mls cef per-prefix-statistics command is enabled, the switch makes a best effort to allocate adjacencies with statistics for each prefix. Statistics for a prefix are computed by adding up the packet/byte counts of all the adjacencies that are associated with the prefix. Because only half of the adjacency table entries have statistics, all prefixes might not be associated with adjacencies with statistics.
Examples
This example shows how to enable per-prefix statistics for all FIB entries:
Console> (enable) set mls cef per-prefix-stats enablePer prefix stats is enabledConsole> (enable)This examples shows how to disable per-prefix statistics for all FIB entriesl:
Console> (enable) set mls cef per-prefix-stats disablePer prefix stats is disabledConsole> (enable)Related Commands
set mls exclude protocol
To exclude an MLS protocol port on a switch configured with the Supervisor Engine 1 with Layer 3 Switching Engine WS-F6K-PFC, use the set mls exclude protocol command. To exclude protocols from statistics gathering on switches configured with the Supervisor Engine 2 with Layer 3 Switching Engine II (PFC2), use the set mls exclude protocol command.
set mls exclude protocol {tcp | udp | both} {port_number | port_name}
Syntax Description
Defaults
This command has no default settings.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
If you enter any of the set mls commands on a Catalyst 6500 series switch without MLS, this warning message is displayed:
MLS not supported on feature card.You can add a maximum of four protocol ports to the exclude table.
MLS exclusion is supported in full flow mode only.
If you enter x for the port name, this specifies the Layer 4 port used by the X-windows application.
Examples
This example shows how to exclude TCP packets on protocol port 6017:
Console> (enable) set mls exclude protocol tcp 6017TCP packets with protocol port 6017 will be switched by RP.Console> (enable)This example shows how to exclude UDP packets on protocol port 6017:
Console> (enable) set mls exclude protocol udp 6017TCP and UDP packets with protocol port 6017 will be switched by RP.Console> (enable)Related Commands
set mls flow
To specify the minimum flow mask used for MLS, use the set mls flow command. This command is needed to collect statistics for the supervisor engine.
set mls flow {destination | destination-source | full}
CautionUse this command carefully. This command purges all existing shortcuts and affects the number of active shortcuts. This command can increase the cache usage and increase the load on the router.
Caution
Caution
Syntax Description
destination
Sets the minimum flow mask to destination flow.
destination-source
Sets the minimum flow mask to source flow.
full
Sets the minimum flow mask to an extended access list.
Defaults
If there are no access lists on any MLS-RP, the flow mask is set to destination flow.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This command specifies the minimum MLS flow mask. Depending on the MLS-RP configuration, the actual flow mask used might be more specific than the specified minimum flow mask. For example, if you configure the minimum flow mask to destination-source, but an MLS-RP interface is configured with IP extended access lists, the actual flow mask used will be full.
If you configure a more specific flow mask (for example, destination-source or full), the number of active flow entries increases. To limit the number of active flow entries, you might need to decrease the MLS aging time.
This command is intended to be used for gathering very detailed statistics at the protocol port level—for example, when NetFlow data is exported to an RMON2 probe.
Examples
These examples show how to specify that only expired flows to subnet 171.69.194.0 are exported:
Console> (enable) set mls flow destinationConfigured flow mask is set to destination flow.Console> (enable)Console> (enable) set mls flow destination-sourceConfigured flow mask is set to destination-source flow.Console> (enable)Console> (enable) set mls flow fullConfigured flow mask is set to full flow.Console> (enable)Related Commands
set mls nde
To configure the NetFlow Data Export (NDE) feature in the Catalyst 6500 series switches to allow command-exporting statistics to be sent to the preconfigured collector, use the set mls nde command.
set mls nde {enable | disable}
set mls nde {collector_ip | collector_name} {udp_port_num}
set mls nde version {1 | 5 | 7 | 8}
set mls nde flow [exclude | include] [destination ip_addr_spec] [source ip_addr_spec]
[protocol protocol] [src-port src_port] [dst-port dst_port]set mls nde {destination-ifindex | source-ifindex} {enable | disable}
Syntax Description
Defaults
The defaults are Netflow Data Export version 7, and all expired flows are exported until the filter is specified explicitly. Destination ifIndex support and source ifIndex support are enabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
If you enter any set mls nde commands on a Catalyst 6500 series switch without MLS, this warning message is displayed:
mls not supported on feature card.When you try to enable NDE and there are previously configured filtered flows on the switch, this warning message is displayed:
Console> (enable) set mls nde enableNetflow export configured for port 80 on host 172.20.25.101Netflow export enabled.Warning!! There is a potential statistics mismatch due to existing excludedprotocols.When you try to add a filter to exclude some protocol packets and NDE is currently enabled, this warning message is displayed:
Console> (enable) set mls exclude protocol tcp 80Netflow tables will not create entries for TCP packets with protocol port80.Warning!! There's a potential statistics mismatch due to enabled NDE.Before you use the set mls nde command for the first time, you must configure the host to collect MLS statistics. The host name and UDP port number are saved in NVRAM, so you do not need to specify them. If you specify a host name and UDP port, values in NVRAM overwrite the old values. Collector values in NVRAM do not clear when NDE is disabled because this command configures the collector but does not enable NDE automatically.
The set mls nde enable command enables NDE, exporting statistics to the preconfigured collector.
If the protocol is not tcp or udp, set the dst-port dst_port and src-port src_port values to 0; otherwise, no flows are displayed.
If you try to enable NDE without first specifying a collector, you see this display:
Console> (enable) set mls nde enablePlease set host name and UDP port number with `set mls nde <collector_name | collector_ip> <udp_port_number>'.Console> (enable)The set mls nde flow command adds filtering to the NDE. Expired flows matching the specified criteria are exported. These values are stored in NVRAM and do not clear when NDE is disabled. If any option is not specified in this command, it is treated as a wildcard. The NDE filter in NVRAM does not clear when NDE is disabled.
Only one filter can be active at a time. If you do not enter the exclude or include keyword, the filter is assumed to be an inclusion filter.
Use the following syntax to specify an IP subnet address:
•
•
•
When you use the set mls nde {collector_ip | collector_name} {udp_port_num} command, the host name and UDP port number are saved in NVRAM and need not be specified again. If you specify a host name and UDP port, the new values overwrite the values in NVRAM. Collector values in NVRAM do not clear when you disable NDE.
Examples
This example shows how to specify that only expired flows to a specific subnet are exported:
Console> (enable) set mls nde flow include destination 171.69.194.140/24NDE destination filter set to 171.69.194.0/24Console> (enable)This example shows how to specify that only expired flows to a specific host are exported:
Console> (enable) set mls nde flow include destination 171.69.194.140NDE destination filter set to 171.69.194.140/32.Console> (enable)This example shows how to specify that only expired flows from a specific subnet to a specific host are exported:
Console> (enable) set mls nde flow include destination 171.69.194.140/24 source 171.69.173.5/24NDE destination filter set to 171.69.194.0/24, source filter set to 171.69.173.0/24Console> (enable)This example shows how to specify that only flows from a specific port are exported:
Console> (enable) set mls nde flow include dst_port 23NDE source port filter set to 23.Console> (enable)This example shows how to specify that only expired flows from a specific host that are of a specified protocol are exported:
Console> (enable) set mls nde flow include source 171.69.194.140 protocol 51NDE destination filter set to 171.69.194.140/32, protocol set to 51.Console> (enable)This example shows how to specify that all expired flows except those from a specific host to a specific destination port are exported:
Console> (enable) set mls nde flow exclude source 171.69.194.140 dst_port 23NDE destination filter set to 171.69.194.140/32, source port filter set to 23.Flows matching the filter will be excluded.Console> (enable)This example shows how to disable destination ifIndex support:
Console> (enable) set mls nde destination-ifindex disabledestination-index export has been disabled.Console> (enable)This example shows how to disable source ifIndex support:
Console> (enable) set mls nde source-ifindex disablesource-index export has been disabled.Console> (enable)Related Commands
clear mls nde flow
show mls
show mls ndeset mls rate
To set the rate at which index-directed packets are sent to the MSFC, use the set mls rate command.
set mls rate kpps
Syntax Description
kpps
MLS rate in thousands of packets per second; valid values are from 0 to 700. See the "Usage Guidelines" section for more information.
Defaults
The kpps argument is 0.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
You disable MLS rate limiting when you set the kpps argument to 0. When you disable MLS rate limiting, the switch bridges packets to the MSFC; packets are not index-directed.
Examples
This example shows how to set MLS rate limiting to 100 kpps:
Console> (enable) set mls rate 100MLS rate limiting set to 100 KppsConsole> (enable)This example shows how to disable MLS rate limiting:
Console> (enable) set mls rate 0MLS rate limiting disabledConsole> (enable)Related Commands
set mls statistics protocol
To add protocols to the protocols statistics list, use the set mls statistics protocol command.
set mls statistics protocol protocol src_port
Syntax Description
Defaults
This command has no default settings.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
If you enter any set mls commands on a Catalyst 6500 series switch without MLS, this warning message is displayed:
MLS not supported on feature card.You can configure a maximum of 64 ports using the set mls statistics protocol command.
If you enter x for the source port, this specifies the Layer 4 port used by the X-windows application.
Examples
This example shows how to set protocols for statistic collection:
Console> (enable) set mls statistics protocol 17 1934Protocol 17 port 1934 is added to protocol statistics list.Console> (enable)Related Commands
clear mls statistics entry
show mls statisticsset mls verify
To enable or disable checksum or packet checking based on packet length, use the set mls verify command.
set mls verify checksum {enable | disable}
set mls verify length {ip | ipx | both} {minimum | inconsistant} {enable | disable}
Syntax Description
Defaults
IP checksum is enabled.
Checking IP and IPX packets based on minimum and inconsistent packet length is enabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
The set mls verify command is available on Supervisor Engine 2 (WS-X6K-SUP2-2GE).
If you enable IP checksum or packet checking based on packet length, the Layer 3 ASIC drops the Layer 3 error packets that it encounters. If you disable this feature, the packets are not dropped.
Note
Checking for inconsistent packet length means that the switch checks for an inconsistency between the physical length of the packet and the length coded in the packet.
Examples
This example shows how to enable IP checksum:
Console> (enable) set mls verify checksum enableIp checksum verification enabledConsole> (enable)This example shows how to enable checking inconsistent IP and IPX packet length:
Console> (enable) set mls verify length both inconsistant enableIpx inconsistant length verification enabledIp inconsistant length verification enabledConsole> (enable)This example shows how to disable checking minimum IPX packet length:
Console> (enable) set mls verify length ipx minimum disableIpx minimum length verification disabledConsole> (enable)Related Commands
set module
To enable or disable a module, use the set module command.
set module enable | disable mod
Syntax Description
Defaults
The default is all modules are enabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
Avoid disabling a module when you are connected through a Telnet session; if you disable your session, you will disconnect your Telnet session.
If there are no other network connections to a Catalyst 6500 series switch (for example, on another module), you have to reenable the module from the console.
You can specify a series of modules by entering a comma between each module number (for
example, 2,3,5). You can specify a range of modules by entering a dash between module numbers (for example, 2-5).The set module disable command does not cut off the power to a module, it only disables the module. To turn off power to a module, refer to the set module power command.
If an individual port on a module was previously disabled, enabling the module does not enable the disabled port.
Examples
This example shows how to enable module 2:
Console> (enable) set module enable 2Module 2 enabled.Console> (enable)This example shows how to disable module 3 when connected through the console port:
Console> (enable) set module disable 3Module 3 disabled.Console> (enable)This example shows how to disable module 2 when connected via a Telnet session:
Console> (enable) set module disable 2This command may disconnect your telnet session.Do you want to continue (y/n) [n]? yModule 2 disabled.Console> (enable)Related Commands
set module name
To set the name for a module, use the set module name command.
set module name mod [mod_name]
Syntax Description
Defaults
The default is no module names are configured for any modules.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
If no module name is specified, any previously specified name is cleared.
Use the set module name command to set the module for the MSM. Additional set module commands are not supported by the MSM.
Examples
This example shows how to set the name for module 1 to Supervisor:
Console> (enable) set module name 1 SupervisorModule name set.Console> (enable)Related Commands
set module power
To turn the power on or off to a module, use the set module power command.
set module power up | down mod
Syntax Description
Defaults
The default is power is on to a module.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
The set module power up command allows you to check if adequate power is available in the system to turn the power on. If not enough power is available, the module status changes from power-down to power-deny, and this message is displayed:
Module 4 could not be powered up due to insufficient power.Examples
This example shows how to power up module 4:
Console> (enable) set module power up 4Module 4 powered up.Console> (enable)This example shows how to power down module 4:
Console> (enable) set module power down 4Module 4 powered down.Console> (enable)Related Commands
set module shutdown
To shut down the NAM and Intrusion Detection System Module (IDSM), use the set module shutdown command.
set module shutdown all | mod
Syntax Description
Defaults
This command has no default settings.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
If you use the set module shutdown command, the configuration is not saved in NVRAM. The next time when the module boots up, it will come online. You can either reinsert or reset the module to bring it online.
If there are no other network connections to a Catalyst 6500 series switch (for example, on another module), you have to reenable the module from the console.
You can specify a series of modules by entering a comma between each module number (for
example, 2,3,5).Examples
This example shows how to shutdown the NAM or IDSM:
Console> (enable) set module shutdown 2Console> (enable)set msfcautostate
To enable or disable the line protocol state determination of the Multilayer Switch Feature Cards (MSFCs) due to port state changes, use the set msfcautostate command.
set msfcautostate {enable | disable}
Syntax Description
enable
Activates the line protocol state determination.
disable
Deactivates the line protocol state determination.
Defaults
The default is enabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This feature is used to accurately reflect the Layer 3 interface status based on the underlying Layer 2 interface status so that routing and other protocols converge faster. Faster protocol convergence prevents traffic from being discarded without notice.
When you enable the MSFC auto state feature, VLAN interfaces on the MSFC are active only when there is at least one other active interface in the spanning tree forwarding state on the Catalyst 6500 series switch. This interface could be a physical end-user port, a trunk connection for which the VLAN is active, or even another MSFC with an equivalent VLAN interface.
If you enable and then disable or disable and then enable the set msfcautostate command, you might have to use the shutdown and no shutdown commands to disable and then restart the VLAN and WAN interfaces on the MSFC.
If your FXS module ports are in an auxiliary VLAN and there are no switching module ports active in the VLAN, the FXS module will not initialize because the MSFC auto state feature shuts down all MSFC interfaces and subinterfaces. We recommend that you add a physical Ethernet port to the VLAN.
Caution
Examples
This example shows how to enable the line protocol state determination of the MSFC:
Console> (enable) set msfcautostate enableConsole> (enable)This example shows how to disable the line protocol state determination of the MSFC:
Console> (enable) set msfcautostate disableConsole> (enable)Related Commands
set msmautostate
To enable or disable the line protocol state determination of the MSMs due to port state changes, use the set msmautostate command.
set msmautostate {enable | disable}
Syntax Description
enable
Activates the line protocol state determination.
disable
Deactivates the line protocol state determination.
Defaults
The default configuration has line protocol state determination disabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
This feature is useful for discontinuing the advertisement of routing paths when access to them is severed (either through fault or administrative disabling).
When you enable msmautostate, VLAN interfaces on the MSM are active only when there is at least one other active interface within the Catalyst 6500 series switch. This could be a physical end-user port, a trunk connection for which the VLAN is active, or even another MSM with an equivalent VLAN interface.
If you disable msmautostate, you might have to use the shutdown and no shutdown commands to disable and then restart the VLAN interface to bring the MSM back up.
Examples
This example shows how to enable the line protocol state determination of the MSM:
Console> (enable) set msmautostate enableMSM port auto state enabled.Console> (enable)This example shows how to disable the line protocol state determination of the MSM:
Console> (enable) set msmautostate disableMSM port auto state disabled.Console> (enable)Related Commands
set multicast router
To configure a port manually as a multicast router port, use the set multicast router command.
set multicast router mod/port
Syntax Description
Defaults
The default is no ports are configured as multicast router ports.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
When you enable IGMP snooping, the ports to which a multicast-capable router is attached are identified automatically. The set multicast router command allows you to configure multicast router ports statically.
Examples
This example shows how to configure a multicast router port:
Console> (enable) set multicast router 3/1Port 3/1 added to multicast router port list.Console> (enable)Related Commands
clear multicast router
set igmp
show multicast group count
show multicast routerset ntp broadcastclient
To enable or disable NTP in broadcast-client mode, use the set ntp broadcastclient command.
set ntp broadcastclient {enable | disable}
Syntax Description
Defaults
The default is broadcast-client mode is disabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
The broadcast-client mode assumes that a broadcast server, such as a router, sends time-of-day information regularly to a Catalyst 6500 series switch.
Examples
This example shows how to enable an NTP broadcast client:
Console> (enable) set ntp broadcastclient enableNTP Broadcast Client mode enabled.Console> (enable)This example shows how to disable an NTP broadcast client:
Console> (enable) set ntp broadcastclient disableNTP Broadcast Client mode disabled.Console> (enable)Related Commands
set ntp broadcastdelay
To configure a time-adjustment factor so the Catalyst 6500 series switch can receive broadcast packets, use the set ntp broadcastdelay command.
set ntp broadcastdelay microseconds
Syntax Description
microseconds
Estimated round-trip time, in microseconds, for NTP broadcasts; valid values are from 1 to 999999.
Defaults
The default is the NTP broadcast delay is set to 3000 milliseconds.
Command Types
Switch command.
Command Modes
Privileged.
Examples
This example shows how to set the NTP broadcast delay to 4000 milliseconds:
Console> (enable) set ntp broadcastdelay 4000NTP broadcast delay set to 4000 microseconds.Console> (enable)Related Commands
set ntp client
To enable or disable a Catalyst 6500 series switch as an NTP client, use the set ntp client command.
set ntp client {enable | disable}
Syntax Description
enable
Enables a Catalyst 6500 series switch as an NTP client.
disable
Disables a Catalyst 6500 series switch as an NTP client.
Defaults
The default is NTP client mode is disabled.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
You can configure NTP in either broadcast-client mode or client mode. The broadcast-client mode assumes that a broadcast server, such as a router, sends time-of-day information regularly to a Catalyst 6500 series switch. The client mode assumes that the client (a Catalyst 6500 series switch) regularly sends time-of-day requests to the NTP server.
Examples
This example shows how to enable NTP client mode:
Console> (enable) set ntp client enableNTP client mode enabled.Console> (enable)Related Commands
set ntp server
To specify the NTP server address and configure an NTP server authentication key, use the set ntp server command.
set ntp server ip_addr [key public_keynum]
Syntax Description
ip_addr
IP address of the NTP server.
key public_keynum
(Optional) Specifies the key number; valid values are 1 to 4292945295.
Defaults
This command has no default settings.
Command Types
Switch command.
Command Modes
Privileged.
Usage Guidelines
The client mode assumes that the client (a Catalyst 6500 series switch) sends time-of-day requests regularly to the NTP server. A maximum of ten servers per client is allowed.
Examples
This example shows how to configure an NTP server:
Console> (enable) set ntp server 172.20.22.191NTP server 172.20.22.191 added.Console> (enable)Related Commands
set ntp summertime
