Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Creates a loopback interface.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Specifies the interface and enters interface configuration mode.

Assigns an IP network address and network mask to the interface.

Exits interface configuration mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Enables OSPF routing and enters router configuration mode.

Specifies the interface on which OSPF runs and defines the area ID for that interface.

Exits router configuration mode and returns to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

• This command is not required on devices that will operate only in NSF helper mode.

• This command is included here only to show how to reenable Cisco NSF helper mode if helper mode was explicitly disabled.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

• This command is not required on devices that will operate only in NSF helper mode.

• This command is included here only to show how to re-enable IETF NSF helper mode if helper mode was explicitly disabled.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Configures an OSPF routing process for IP and enters router configuration mode.

• The value for the process-id argument is an internally used identification parameter for an OSPF routing process. It is locally assigned and can be any positive integer. Assign a unique value for each OSPF routing process.

Enables MPLS TE for the indicated OSPF area.

Specifies that the TE router identifier for the node is the IP address associated with interface loopback0.

Exits to global configuration mode.

Exits to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Configures MPLS hop-by-hop forwarding globally. The mpls ip command is enabled by default; you do not have to specify this command.

Configures the use of LDP on all the interfaces.

Specifies the preferred interface for determining the LDP router ID.

Exits global configuration mode and enters privileged EXEC mode.

Displays the LDP identifier for the local router.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Globally enables MPLS hop-by-hop forwarding.

Specifies LDP as the default label distribution protocol.

Specifies the interface to configure, and enters interface configuration mode.

Assigns an IP address and network mask to the interface.

Exits interface configuration mode.

Enables OSPF routing and enters router configuration mode.

Specifies the interface where OSPF runs and defines the area ID for that interface.

Enables the MPLS LDP Autoconfiguration feature.

If no OSPF area is specified, the command applies to all the interfaces associated with the OSPF process. If an area ID is specified, then only the interfaces associated with that OSPF area are enabled with LDP.

Exits router configuration mode and returns to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Specifies the interface to configure, and enters interface configuration mode.

Disables LDP for that interface.

Exits interface configuration mode and returns to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Displays the method used to enable LDP on an interface.

The following example shows that LDP was enabled on the interface by both the mpls ip and mpls ldp autoconfig commands:

Interface TenGigabitEthernet4/1:
     IP labeling enabled (ldp):
      Interface config
      IGP config
     LSP Tunnel labeling enabled
     BGP labeling not enabled
     MPLS operational
     Fast Switching Vectors:
       IP to MPLS Fast Switching Vector
       MPLS Turbo Vector
        MTU = 1500

Displays how LDP was enabled on the interface.

In the following example, LDP was enabled by both the mpls ip and mpls ldp autoconfig commands:

Local LDP Identifier:
    10.11.11.11:0
    Discovery Sources:
    Interfaces:
      TenGigabitEthernet4/1 (ldp): xmit/recv
        Enabled: Interface config, IGP config;
        Hello interval: 5000 ms; Transport IP addr: 10.11.11.11
        LDP Id: 10.10.10.10:0
          Src IP addr: 10.0.0.1; Transport IP addr: 10.10.10.10
          Hold time: 15 sec; Proposed local/peer: 15/15 sec

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Globally enables MPLS hop-by-hop forwarding.

Specifies LDP as the default label distribution protocol.

Specifies the interface to configure and enters interface configuration mode.

Assigns an IP address and network mask to the interface.

Enables hop-by-hop forwarding on the interface.

Exits interface configuration mode.

Enables OSPF routing and enters router configuration mode.

Defines an interface on which OSPF runs and defines the area ID for that interface.

Enables MPLS LDP-IGP synchronization for interfaces for an OSPF process.

Specifies the period that an IGP session must wait to synchronize with LDP.

Exits router configuration mode and returns to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Specifies the interface to configure and enters interface configuration mode.

Disables MPLS LDP-IGP synchronization for that interface.

Exits interface configuration mode and returns to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Displays the output of this command in the following example shows that MPLS LDP–IGP synchronization is configured correctly, because LDP is configured and the SYNC status shows that synchronization is enabled.

TenGigabitEthernet4/1:
  LDP configured; SYNC enabled.
  SYNC status: sync achieved; peer reachable.
  IGP holddown time: infinite.
  Peer LDP Ident: 10.0.0.1:0
  IGP enabled: OSPF 1

Displays the output of the show ip ospf mpls ldp interface command in the following example shows that the interfaces are properly configured.

TenGigabitEthernet4/1
  Process ID 1, Area 0
  LDP is configured through LDP autoconfig
  LDP-IGP Synchronization: Yes
  Holddown timer is not configured
  Timer is not running
TenGigabitEthernet4/2
  Process ID 1, Area 0
  LDP is configured through LDP autoconfig
  LDP-IGP Synchronization: Yes
  Holddown timer is not configured
  Timer is not running

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Configures MPLS LDP backoff mechanism and specifies the period for initial and maximum backoff.

Returns to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Configures Cisco Express Forwarding.

Configures a loopback interface and enters interface configuration mode.

Assigns an IP address and network mask to the loopback interface.

Specifies the interface to configure and enters interface configuration mode.

Configures MPLS hop-by-hop forwarding for a specified interface.

Configures the use of LDP on a specific interface.

Exits interface configuration mode and enters global configuration mode.

Enables MPLS LDP Session Protection.

—

Use this command and check that the output contains xmit/recv to the peer router.

Local LDP Identifier:
     10.0.0.5:0
     Discovery Sources:
     Interfaces:
        TenGigabitEthernet4/1 (ldp): xmit/recv
           LDP Id: 10.0.0.1:0
     Targeted Hellos:
        10.0.0.5 -> 10.0.0.3 (ldp): active, xmit/recv
           LDP Id: 10.0.0.3:0

Use this command to check that the targeted hellos are active.

Peer LDP Ident: 10.0.0.3:0; Local LDP Ident 10.0.0.5:0
TCP connection: 10.0.0.3.646 - 10.0.0.5.11005
State: Oper; Msgs sent/rcvd: 1453/1464; Downstream
Up time: 21:09:56
LDP discovery sources:
  Targeted Hello 10.0.0.5 -> 10.0.0.3, active
Addresses bound to peer LDP Ident:
  10.3.104.3   10.0.0.2   10.0.0.3

Use this command to check that the MPLS LDP Session Protection state is Ready or Protecting. If the second last line of the output shows Incomplete, the Targeted Hello Adjacency is not up yet.

Peer LDP Ident: 10.16.16.16:0; Local LDP Ident 10.15.15.15:0
   TCP connection: 10.16.16.16.11013 - 10.15.15.15.646
   State: Oper; Msgs sent/rcvd: 53/51; Downstream; Last TIB rev sent 74
   Up time: 00:11:32; UID: 1; Peer Id 0;
   LDP discovery sources:
     Targeted Hello 10.15.15.15 -> 10.16.16.16, active, passive;
     holdtime: infinite, hello interval: 10000 ms
   Addresses bound to peer LDP Ident:
     10.0.0.2     10.16.16.16     10.101.101.101     11.0.0.1
   Peer holdtime: 180000 ms; KA interval: 60000 ms; Peer state: estab
   Clients: Dir Adj Client
   LDP Session Protection enabled, state: Protecting
      duration: infinite

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Configures MPLS hop-by-hop forwarding globally.

Configures the use of LDP on all the interfaces.

Specifies the interface to configure and enters interface configuration mode.

Configures MPLS hop-by-hop forwarding on the interface.

Exits interface configuration mode and enters the global configuration mode.

Exits global configuration mode and enters privileged EXEC mode.

Verifies that the interfaces have been configured to use LDP.

Verifies that the interface is up and is sending Discovery Hello messages.

Displays the status of LDP sessions.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Configures MPLS hop-by-hop forwarding globally.

Configures the use of LDP on all the interfaces.

Specifies the interface to configure and enters interface configuration mode.

Configures MPLS hop-by-hop forwarding on the interface.

Exits interface configuration mode and enters global configuration mode.

Advertises an explicit null label in situations where it would normally advertise an implicit null label.

Exits global configuration mode and enters privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Enables MPLS LDP graceful restart.

Specifies the period the MPLS forwarding state must hold after the control plane restarts.

Specifies the period a LSR must hold stale label-forward error correction (FEC) bindings after an LDP session has been reestablished.

Specifies the period a LSR must wait for an LDP session to be reestablished.

Returns to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Enables Cisco Express Forwarding.

Enables MPLS traffic engineering tunnel signaling on a device.

Specifies the interface and enters interface configuration mode.

Assigns an IP network address and network mask to the interface.

Enables RSVP for IP on an interface to support traffic engineering.

Returns to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Specifies the interface to configure and enters interface configuration mode. Repeat this step as needed to configure the additional interfaces.

Enables support for RSVP graceful restart on routers helping their neighbors recover TE tunnels following Stateful Switchover (SSO). Repeat this step as needed to configure additional IP addresses on the interfaces of the neighboring router.

Returns to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Configures an LSP attribute list and enters LSP Attributes configuration mode.

• The string argument identifies a specific LSP attribute list.

(Optional) Specifies attribute flags for links comprising an LSP.

• The value argument is a value required for links that make up an LSP. The values of the bits are either 0 or 1.

• The mask value keyword argument combination indicates the attribute values to be checked.

  • If a bit in the mask is 0, an attribute value of the link or that bit is irrelevant.

  • If a bit in the mask is 1, the attribute value of that link and the required affinity of the LSP for that bit must match.

Specifies an LSP bandwidth.

• The global keyword indicates a global pool path option.

• The kbps argument is the number of kilobits per second set aside for the path option. The range is from 1 to 4294967295 kbps.

Specifies the LSP priority.

• The setup-priority argument is used when signaling an LSP to determine which existing LSPs can be preempted. The values range from 0 to 7, where a lower number indicates a higher priority. Therefore, an LSP with a setup priority of 0 can preempt any LSP with a non 0 priority.

• The hold-priority argument is associated with an LSP to determine if it should be preempted by other LSPs that are being signaled. The values range from 0 to 7, where a lower number indicates a higher priority.

(Optional) Displays the contents of the LSP attribute list.

(Optional) Exits LSP Attributes configuration mode.

(Optional) Exits to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Configures an interface type and enters interface configuration mode.

• The type argument is the type of interface that you want to configure.

• The number argument is the number of the tunnel interface that you want to create or configure.

Specifies the destination of the tunnel for this path option.

• The hostname argument is the name of the host destination.

• The ip-address argument is the IP address of the host destination expressed in decimal in four-part, dotted notation.

Sets the encapsulation mode for the tunnel for MPLS TE.

(Optional) Specifies that the IGP should use the tunnel (if the tunnel is up) in its enhanced shortest path first (SPF) calculation.

Configures the bandwidth required for a MPLS TE tunnel and assigns it to the global pool. The kbps argument is the bandwidth, in kilobits per second, set aside for the MPLS TE tunnel. The valid range is from 1 to 4294967295 kbps.

Sets the priority to be used when the system determines which existing tunnels are eligible to be preempted.

• The setup-priority argument is the priority used when signaling an LSP for this tunnel to determine which existing tunnels can be preempted.

  The valid values range from 0 to 7. A lower number indicates a higher priority. An LSP with a setup priority of 0 can preempt any LSP with a non 0 priority.

• The hold-priority argument is the priority associated with an LSP for this tunnel to determine if it should be preempted by other LSPs that are being signaled.

  The valid values range from 0 to 7, where a lower number indicates a higher priority.

Adds an LSP attribute list to specify LSP-related parameters for path options for an MPLS TE tunnel.

• The number argument identifies the path option.

• The dynamic keyword indicates that the path option is dynamically calculated (the router figures out the best path).

• The explicit keyword indicates that the path option is specified. Specify the IP addresses of the path.

• The name path-name keyword argument combination identifies the name of the explicit path option.

• The path-number argument identifies the number of the explicit path option.

• The verbatim keyword bypasses the topology database verification. You can use the verbatim keyword only with the explicit path option.

• The attributes string keyword argument combination names an attribute list to specify path options for the LSP.

• The bandwidth keyword specifies the LSP bandwidth.

• The global keyword indicates a global pool path option.

• The kbps argument is the number of kilobits per second set aside for the path option. The valid range is from 1 to 4294967295 kbps.

• The lockdown keyword disables reoptimization of the LSP.

(Optional) Exits to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Configures an LSP attribute list and enters LSP Attributes configuration mode.

• The string argument identifies a specific LSP attribute list.

(Optional) Specifies the attribute flags for links comprising an LSP.

• The value argument is a value required for links that make up an LSP. The values of the bits are either 0 or 1.

• The mask value keyword argument combination indicates which attribute values should be checked.

  • If a bit in the mask is 0, an attribute value of the link or that bit is irrelevant.

  • If a bit in the mask is 1, the attribute value of that link and the required affinity of the LSP for that bit must match.

(Optional) Specifies the automatic bandwidth configuration.

• The frequency secs keyword argument combination specifies the interval between bandwidth adjustments. The specified interval can be from 300 to 604800 seconds.

• The max-bw kbps keyword argument combination specifies the maximum automatic bandwidth, in kbps, for this path option. The value can be from 0 to 4294967295.

• The min-bw kpbs keyword argument combination specifies the minimum automatic bandwidth, in kbps, for this path option. The value can range from 0 to 4294967295.

• The collect-bw keyword collects output rate information for the path option, but does not adjust the bandwidth of the path option.

(Optional) Specifies the LSP bandwidth.

• The global keyword indicates a global pool path option.

• The kbps argument is the number of kilobits per second set aside for the path option. The range is from 1 to 4294967295 kbps.

(Optional) Displays the contents of the LSP attribute list.

(Optional) Disables reoptimization of the LSP.

(Optional) Specifies the LSP priority.

• The setup-priority argument is used when signaling an LSP to determine which existing LSPs can be preempted. The valid values range from 0 to 7, where a lower number indicates a higher priority. Therefore, an LSP with a setup priority of 0 can preempt any LSP with a non 0 priority.

• The hold-priority argument is associated with an LSP to determine if it should be preempted by other LSPs that are being signaled. The valid values range from 0 to 7, where a lower number indicates a higher priority.

(Optional) Records the route used by the LSP.

(Optional) Removes a specific attribute from the LSP attributes list.

• The sub-command argument names the LSP attribute to remove from the attributes list.

(Optional) Exits from LSP attributes configuration mode.

(Optional) Exits to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Configures an LSP attribute list and enters LSP Attributes configuration mode.

• The string argument identifies a specific LSP attribute list.

Specifies the attribute flags for links comprising an LSP.

• The value argument is a value required for links comprising an LSP. The valid values of bits are either 0 or 1.

• The mask value keyword argument combination indicates which attribute values should be checked.

  • If a bit in the mask is 0, an attribute value of the link or that bit is irrelevant.

  • If a bit in the mask is 1, the attribute value of that link and the required affinity of the tunnel for that bit must match.

(Optional) Displays the contents of the LSP attribute list.

• Use the list command to verify that the path option attributes is modified in the attribute list.

(Optional) Exits LSP Attributes configuration mode.

(Optional) Exits to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Configures an LSP attribute list and enters LSP Attributes configuration mode.

• The string argument identifies a specific LSP attribute list.

Removes a specific attribute from the LSP attribute list.

• The sub-command argument names the LSP attribute to remove from the attributes list.

(Optional) Displays the contents of the LSP attribute list.

• Use the list command to verify that the path option attribute is removed from the attribute list.

(Optional) Exits LSP Attributes configuration mode.

(Optional) Exits to privileged EXEC mode.

—

Enables privileged EXEC mode.

• Enter your password if prompted.

Enters global configuration mode.

Removes a specified LSP attribute list from the device configuration.

• The string argument identifies the specific LSP attribute list to remove.

(Optional) Exits to privileged EXEC mode.

(Optional) Displays information about configured LSP attribute lists.

• Use the show mpls traffic-eng lsp attributes command to verify that the LSP attribute list is deleted.

—