-
- MPLS Traffic Engineering - LSP Attributes
- MPLS Traffic Engineering (TE) - Autotunnel Primary and Backup
- MPLS Traffic Engineering - AutoTunnel Mesh Groups
- MPLS Traffic Engineering - Verbatim Path Support
- MPLS Traffic Engineering - RSVP Hello State Timer
- MPLS Traffic Engineering Forwarding Adjacency
- MPLS Traffic Engineering (TE) - Class-based Tunnel Selection
- MPLS Traffic Engineering - Interarea Tunnels
- MPLS TE - Bundled Interface Support
- MPLS Traffic Engineering�Automatic Bandwidth Adjustment for TE Tunnels
- MPLS Point-to-Multipoint Traffic Engineering
- MPLS Traffic Engineering�Tunnel Source
-
- MPLS Traffic Engineering - Inter-AS TE
- MPLS Traffic Engineering - Shared Risk Link Groups
- MPLS Traffic Engineering (TE) - Autotunnel Primary and Backup
- MPLS Traffic Engineering (TE) - Path Protection
- MPLS Traffic Engineering (TE) - Fast Reroute (FRR) Link and Node Protection
- MPLS TE: Link and Node Protection, with RSVP Hellos Support (with Fast Tunnel Interface Down Detection)
- MPLS Traffic Engineering: BFD-triggered Fast Reroute (FRR)
-
- MPLS MTU Command Changes
- AToM Static Pseudowire Provisioning
- MPLS Pseudowire Status Signaling
- L2VPN Interworking
- L2VPN Pseudowire Redundancy
- L2VPN Pseudowire Switching
- VPLS Autodiscovery: BGP Based
- H-VPLS N-PE Redundancy for QinQ and MPLS Access
- L2VPN Multisegment Pseudowires
- QOS Policy Support on L2VPN ATM PVPs
- L2VPN: Pseudowire Preferential Forwarding
-
- Configuring MPLS Layer 3 VPNs
- MPLS VPN Half-Duplex VRF
- MPLS VPN�Show Running VRF
- MPLS VPN�VRF CLI for IPv4 and IPv6 VPNs
- MPLS VPN--BGP Local Convergence
- MPLS VPN�Route Target Rewrite
- MPLS VPN�Per VRF Label
- MPLS VPN 6VPE per VRF Label
- MPLS Multi-VRF (VRF Lite) Support
- BGP Best External
- BGP PIC Edge for IP and MPLS-VPN
- MPLS VPN - L3VPN over GRE
- Dynamic Layer-3 VPNs with Multipoint GRE Tunnels
- MPLS VPN over mGRE
-
- MPLS LSP Ping/Traceroute for LDP/TE, and LSP Ping for VCCV
- MPLS EM�MPLS LSP Multipath Tree Trace
- Pseudowire Emulation Edge-to-Edge MIBs for Ethernet, Frame Relay, and ATM Services
- MPLS Enhancements to Interfaces MIB
- MPLS Label Distribution Protocol MIB Version 8 Upgrade
- MPLS EM�MPLS LDP MIB - RFC 3815
- MPLS Label Switching Router MIB
- MPLS EM�MPLS LSR MIB - RFC 3813
- MPLS Traffic Engineering MIB
- MPLS Traffic Engineering - Fast Reroute MIB
- MPLS EM - TE MIB RFC 3812
- MPLS VPN�MIB Support
- MPLS EM - MPLS VPN MIB RFC4382 Upgrade
-
- MPLS High Availability: Overview
- MPLS High Availability: Command Changes
- MPLS LDP Graceful Restart
- NSF/SSO - MPLS LDP and LDP Graceful Restart
- NSF/SSO: MPLS VPN
- AToM Graceful Restart
- NSF/SSO�Any Transport over MPLS and AToM Graceful Restart
- NSF/SSO - MPLS TE and RSVP Graceful Restart
- ISSU MPLS Clients
- NSF/SSO/ISSU Support for VPLS
- NSF/SSO and ISSU - MPLS VPN 6VPE and 6PE
- Finding Feature Information
- Contents
- Restrictions for MPLS LDP Autoconfiguration
- Information About MPLS LDP Autoconfiguration
- How to Configure MPLS LDP Autoconfiguration
- Configuring MPLS LDP Autoconfiguration with OSPF Interfaces
- Disabling MPLS LDP Autoconfiguration from Selected OSPF Interfaces
- Verifying MPLS LDP Autoconfiguration with OSPF
- Configuring MPLS LDP Autoconfiguration with IS-IS Interfaces
- DETAILED STEPS
- Disabling MPLS LDP Autoconfiguration from Selected IS-IS Interfaces
- Verifying MPLS LDP Autoconfiguration with IS-IS
MPLS LDP Autoconfiguration
The MPLS LDP Autoconfiguration feature enables you to globally configure Label Distribution Protocol (LDP) on every interface associated with a specified Interior Gateway Protocol (IGP) instance.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the "Feature Information for MPLS LDP Autoconfiguration" section.
Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Contents
•Restrictions for MPLS LDP Autoconfiguration
•Information About MPLS LDP Autoconfiguration
•How to Configure MPLS LDP Autoconfiguration
•Configuration Examples for MPLS LDP Autoconfiguration
•Feature Information for MPLS LDP Autoconfiguration
Restrictions for MPLS LDP Autoconfiguration
The MPLS LDP Autoconfiguration feature has the following restrictions:
•In Cisco IOS Release 12.0(32)SY, the mpls ldp autoconfig command is supported only with OSPF. Other IGPs are not supported.
•If LDP is disabled globally, the mpls ldp autoconfig command fails and generates a console message explaining that LDP must first be enabled globally by means of the global mpls ip command.
•If the mpls ldp autoconfig command is configured for an IGP instance, you cannot issue the global no mpls ip command. To disable LDP, you must first issue the no mpls ldp autoconfig command.
•For interfaces running IS-IS processes, you can enable Multiprotocol Label Switching (MPLS) for each interface, using the router mode command mpls ldp autoconfig or mpls ldp igp autoconfig at the interface level.
•You specify that the default label distribution protocol is LDP for a router or for an interface. Tag Distribution Protocol (TDP) is not supported.
•The MPLS LDP Autoconfiguration feature is not supported on traffic engineering tunnel interfaces.
Information About MPLS LDP Autoconfiguration
To enable LDP, you should configure it globally and on each interface where it is needed. Configuring LDP on many interfaces can be time-consuming. The following section provides information about autoconfiguration feature on OSPF and IS-IS interfaces:
•MPLS LDP Autoconfiguration on OSPF and IS-IS Interfaces
MPLS LDP Autoconfiguration on OSPF and IS-IS Interfaces
The MPLS LDP Autoconfiguration feature enables you to globally enable LDP on every interface associated with an IGP instance. This feature is supported on OSPF and IS-IS IGPs. It provides a means to block LDP from being enabled on interfaces that you do not want enabled. The goal of the MPLS LDP Autoconfiguration feature is to make configuration easier, faster, and error free.
You issue the mpls ldp autoconfig command to enable LDP on each interface that is running an OSPF or IS-IS process. If you do not want some of the interfaces to have LDP enabled, you can issue the no form of the mpls ldp igp autoconfig command on those interfaces.
How to Configure MPLS LDP Autoconfiguration
This section contains the following procedures:
•Configuring MPLS LDP Autoconfiguration with OSPF Interfaces (required)
•Disabling MPLS LDP Autoconfiguration from Selected OSPF Interfaces (optional)
•Verifying MPLS LDP Autoconfiguration with OSPF (optional)
•Configuring MPLS LDP Autoconfiguration with IS-IS Interfaces (required)
•Disabling MPLS LDP Autoconfiguration from Selected IS-IS Interfaces (optional)
•Verifying MPLS LDP Autoconfiguration with IS-IS (optional)
Configuring MPLS LDP Autoconfiguration with OSPF Interfaces
The following steps explain how to configure LDP for interfaces running OSPF processes.
SUMMARY STEPS
1. enable
2. configure terminal
3. mpls ip
4. mpls label protocol ldp
5. interface type number
6. ip address prefix mask
7. exit
8. router ospf process-id
9. network ip-address wildcard-mask area area-id
10. mpls ldp autoconfig [area area-id]
11. end
DETAILED STEPS
Disabling MPLS LDP Autoconfiguration from Selected OSPF Interfaces
When you issue the mpls ldp autoconfig command, all the interfaces that belong to an OSPF area are enabled for LDP. To remove LDP from some interfaces, use the no mpls ldp igp autoconfig command on those interfaces. The following configuration steps show how to disable LDP from some of the interfaces after they were configured with the MPLS LDP Autoconfiguration feature with the mpls ldp autoconfig command.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface type number
4. no mpls ldp igp autoconfig
5. end
DETAILED STEPS
Verifying MPLS LDP Autoconfiguration with OSPF
The following steps explain how to verify the MPLS LDP Autoconfiguration feature.
SUMMARY STEPS
1. enable
2. show mpls interfaces [type number | vrf vpn-name] [all] [detail] [internal]
3. show mpls ldp discovery [vrf vpn-name | all] [detail]
DETAILED STEPS
Step 1 enable
Enables privileged EXEC mode. Enter your password if prompted.
Step 2 show mpls interfaces [type number | vrf vpn-name] [all] [detail] [internal]
The show mpls interfaces command displays the method used to enable LDP on an interface:
•If LDP is enabled by the mpls ldp autoconfig command, the output displays:
IP labeling enabled (ldp):
IGP config
•If LDP is enabled by the mpls ip command, the output displays:
IP labeling enabled (ldp):
Interface config
•If LDP is enabled by the mpls ip command and the mpls ldp autoconfig command, the output displays:
IP labeling enabled (ldp):
Interface config
IGP config
The following example shows that LDP was enabled on the interface by both the mpls ip and mpls ldp autoconfig commands:
Router# show mpls interfaces Serial 2/0 detail
Interface Serial2/0:
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
Step 3 show mpls ldp discovery [vrf vpn-name | all] [detail]
The show mpls ldp discovery detail command also shows how LDP was enabled on the interface. In the following example, LDP was enabled by both the mpls ip and mpls ldp autoconfig commands:
Router# show mpls ldp discovery detail
Local LDP Identifier:
10.11.11.11:0
Discovery Sources:
Interfaces:
Serial2/0 (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
Configuring MPLS LDP Autoconfiguration with IS-IS Interfaces
The following steps explain how to configure the MPLS LDP Autoconfiguration feature for interfaces that are running IS-IS processes.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface type number
4. ip address prefix mask
5. ip router isis
6. exit
7. mpls ip
8. mpls label protocol ldp
9. router isis
10. mpls ldp autoconfig [level-1 | level-2]
11. end
DETAILED STEPS
Disabling MPLS LDP Autoconfiguration from Selected IS-IS Interfaces
When you issue the mpls ldp autoconfig command, all the interfaces that belong to an IS-IS process are enabled for LDP. To remove LDP from some interfaces, use the no mpls ldp igp autoconfig command on those interfaces. The following configuration steps show how to disable LDP from some of the interfaces after they were configured with the MPLS LDP Autoconfiguration feature with the mpls ldp autoconfig command.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface type number
4. no mpls ldp igp autoconfig
5. end
DETAILED STEPS
Verifying MPLS LDP Autoconfiguration with IS-IS
You can verify that the MPLS LDP Autoconfiguration feature is working correctly with the show isis mpls ldp command.
SUMMARY STEPS
1. enable
2. show isis mpls ldp
DETAILED STEPS
Step 1 enable
Enables privileged EXEC mode.
Step 2 show isis mpls ldp
The output of the following show isis mpls ldp command shows that IS-IS is configured on the interface and that LDP is enabled:
Router# show isis mpls ldp
Interface: POS0/2; ISIS tag null enabled
ISIS is UP on interface
AUTOCONFIG Information :
LDP enabled: YES
SYNC Information :
Required: NO
The output shows :
•IS-IS is up.
•LDP is enabled.
If the MPLS LDP Autoconfiguration feature is not enabled on an interface, the output looks like the following:
Interface: Ethernet0; ISIS tag null enabled
ISIS is UP on interface
AUTOCONFIG Information :
LDP enabled: NO
SYNC Information :
Required: NO
Troubleshooting Tips
You can use the debug mpls ldp autoconfig command to display events that are related to the MPLS LDP Autoconfiguration feature.
Configuration Examples for MPLS LDP Autoconfiguration
The following sections show examples for the MPLS LDP Autoconfiguration feature with OSPF and IS-IS processes.
•MPLS LDP Autoconfiguration with OSPF: Example
•MPLS LDP Autoconfiguration with IS-IS: Examples
MPLS LDP Autoconfiguration with OSPF: Example
The following configuration commands enable LDP for OSPF process 1 area 3. The mpls ldp autoconfig area 3 command and the OSPF network commands enable LDP on POS interfaces 0/0, 0/1, and 1/1. The no mpls ldp igp autoconfig command on POS interface 1/0 prevents LDP from being enabled on POS interface 1/0, even though OSPF is enabled for that interface.
configure terminal
interface POS 0/0
ip address 10.0.0.1 255.0.0.0
!
interface POS 0/1
ip address 10.0.1.1 255.0.0.1
!
interface POS 1/1
ip address 10.1.1.1 255.255.0.0
!
interface POS 1/0
ip address 10.1.0.1 0.1.0.255
exit
!
router ospf 1
network 10.0.0.0 0.0.255.255 area 3
network 10.1.0.0 0.0.255.255 area 3
mpls ldp autoconfig area 3
end
interface POS 1/0
no mpls ldp igp autoconfig
MPLS LDP Autoconfiguration with IS-IS: Examples
The following example shows the configuration of the MPLS LDP Autoconfiguration feature on POS0/2 and 0/3 interfaces, which are running IS-IS processes:
configure terminal
interface POS 0/2
ip address 10.0.0.1 255.0.0.1
ip router isis
!
interface POS 0/3
ip address 10.1.1.1 255.0.1.0
ip router isis
exit
mpls ip
mpls label protocol ldp
router isis
mpls ldp autoconfig
Additional References
The following sections provide references related to the MPLS LDP Autoconfiguration feature.
Related Documents
|
|
---|---|
MPLS commands |
|
MPLS LDP |
|
The MPLS LDP-IGP Synchronization feature |
|
The MPLS LDP Session Protection feature |
|
Configuring integrated IS-IS |
Standards
|
|
---|---|
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature |
— |
MIBs
|
|
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MPLS LDP MIB |
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: |
RFCs
|
|
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RFC 3036 |
|
RFC 3037 |
Technical Assistance
Feature Information for MPLS LDP Autoconfiguration
Table 1 lists the release history for this feature.
Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp. An account on Cisco.com is not required.

Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.
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|
|
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MPLS LDP Autoconfiguration |
12.0(30)S |
This feature enables you to globally configure LDP on every interface associated with a specified Interior Gateway Protocol (IGP) instance. The following sections provide information about this feature: • • In Cisco IOS Release 12.0(30)S, this feature was introduced with support for OSPF. In Cisco IOS Release 12.0(32)SY, support for IS-IS was added. This feature was integrated into Cisco IOS This feature was integrated into Cisco IOS This feature was integrated into Cisco IOS In Release 15.0(1)M, support for IS-IS was added. This feature was integrated into Cisco IOS Release 12.2(33)XNE with support for IS-IS on the Cisco 10000 series router. The following commands were modified: mpls ldp autoconfig, mpls ldp igp autoconfig, show isis mpls ldp, and show mpls ldp discovery. |