Cisco 10000-2P2-2DC Software Guide - Page 445
Any Transport over MPLS-Tunnel Selection
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Chapter 20 Configuring L2 Virtual Private Networks Any Transport over MPLS-Tunnel Selection Default path: active Next hop: point2point Create time: 00:00:53, last status change time: 00:00:10 Signaling protocol: LDP, peer 2.2.2.2:0 up MPLS VC labels: local 22, remote 98 Group ID: local 0, remote 0 MTU: local 1500, remote 1500 Remote interface description: Sequencing: receive disabled, send disabled VC statistics: packet totals: receive 0, send 0 byte totals: receive 0, send 0 packet drops: receive 0, seq error 0, send 0 Any Transport over MPLS-Tunnel Selection Tunnel Selection allows you to specify the path that Any Transport over MPLS (AToM) traffic uses. You can specify either a MPLS traffic engineering tunnel or a destination IP address. If the specified path is unreachable, you can specify that the virtual circuits (VCs) should use the default path, which is the path that MPLS Label Distribution Protocol (LDP) uses for signaling. Note By default, the preferred-path sub-command has a fallback pseudowire. If the preferred pseudowire goes down, the MPLS/LDP module switch the circuit temporarily to another pseudowire. When the preferred pseudowire is up again, the circuit is switched back to the preferred pseudowire. The preferred-path subcommand also has an disable-fallback option, so that no random pseudowire is chosen if the preferred path goes down. The circuit is down until the preferred path pseudowire comes back up. However, in the 12.2(33) SB release, by default, the preferred-path sub-command has the disable-fallback option. There is no fallback pseudowire in this release, even when the option is stated explicitly. See the Any Transport over MPLS: Tunnel Selection document for the following information: • Prerequisites for Any Transport over MPLS: Tunnel Selection • Restrictions for Any Transport over MPLS: Tunnel Selection • Configuring Any Transport over MPLS: Tunnel Selection • The debug mpls l2transport vc command for verifying Any Transport over MPLS: Tunnel Selection • Verifying the Configuration-Example • Troubleshooting Any Transport over MPLS: Tunnel Selection-Example Configuration Example-Any Transport over MPLS: Tunnel Selection The following example sets up two preferred paths for PE1. One preferred path specifies an MPLS traffic engineering tunnel. The other preferred path specifies an IP address of a loopback address on PE2. There is a static route configured on PE1 that uses a TE tunnel to reach the IP address on PE2. Router PE1 mpls label protocol ldp mpls traffic-eng tunnels mpls ldp router-id Loopback0 OL-2226-23 Cisco 10000 Series Router Software Configuration Guide 20-47
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