Destination List (Prefix-List) - Cisco ASR 9000 Series Configuration Manual
Aggregation services router mpls
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Destination List (Prefix-List)
• Minimizes future configurations resulting due to network growth.
Related Topics
Configuring Auto-Tunnel Mesh Tunnel ID, on page 244
Configuring Auto-tunnel Mesh Unused Timeout, on page 245
Configuring Auto-Tunnel Mesh Group, on page 246
Configuring Tunnel Attribute-Set Templates, on page 248
Enabling LDP on Auto-Tunnel Mesh, on page 250
Destination List (Prefix-List)
Auto-mesh tunnels can be automatically created using prefix-list. Each TE enabled router in the network
learns about the TE router IDs through a existing IGP extension.
You can view the router IDs on the router using this command:
show mpls traffic-eng topology | include TE Id
IGP Id: 0001.0000.0010.00, MPLS TE Id:100.1.1.1 Router Node
IGP Id: 0001.0000.0011.00, MPLS TE Id:100.2.2.2 Router Node
IGP Id: 0001.0000.0012.00, MPLS TE Id:100.3.3.3 Router Node
A prefix-list may be configured on each TE router to match a desired set of router IDs (MPLS TE ID as shown
in the above output). For example, if a prefix-list is configured to match addresses of 100.0.0.0 with wildcard
0.255.255.255, then all 100.x.x.x router IDs are included in the auto-mesh group.
When a new TE router is added in the network and its router ID is also in the block of addresses described
by the prefix-list, for example, 100.x.x.x, then it is added in the auto-mesh group on each existing TE router
without having to explicitly modify the prefix-list or perform any additional configuration.
Auto-mesh does not create tunnels to its own (local) TE router IDs.
When prefix-list configurations on all routers are not identical, it can result in non- symmetrical mesh of
Note
tunnels between those routers.
Related Topics
Configuring Auto-Tunnel Mesh Tunnel ID, on page 244
Configuring Auto-tunnel Mesh Unused Timeout, on page 245
Configuring Auto-Tunnel Mesh Group, on page 246
Configuring Tunnel Attribute-Set Templates, on page 248
Enabling LDP on Auto-Tunnel Mesh, on page 250
Cisco ASR 9000 Series Aggregation Services Router MPLS Configuration Guide, Release 4.3.x
154
It eliminates the need to reconfigure each existing TE LSR in order to establish a full mesh of TE tunnels
whenever a new TE LSR is added in the network.
Implementing MPLS Traffic Engineering
(ISIS 1 level-2)
(ISIS 1 level-2)
(ISIS 1 level-2)
OL-28381-02
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