Cisco Cisco IOS Software Release 12.2(33)SRE
Any Transport over MPLS: Tunnel Selection
Prerequisites for Any Transport over MPLS: Tunnel Selection
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Cisco IOS Release: Multiple releases
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Prerequisites for Any Transport over MPLS: Tunnel Selection
For the Cisco 7600 series router, see the following documents for prerequisites:
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Configuring PFC3BXL and PFC3B Mode Multiprotocol Label Switching
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Configuring Multiprotocol Label Switching on the Optical Services Modules
Restrictions for Any Transport over MPLS: Tunnel Selection
This feature is supported only on the Cisco 7600 series router in Cisco IOS Release 12.2(33)SRA and
later releases.. For the Cisco 7600 series router, see the following documents for restrictions:
later releases.. For the Cisco 7600 series router, see the following documents for restrictions:
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Configuring PFC3BXL and PFC3B Mode Multiprotocol Label Switching
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Configuring Multiprotocol Label Switching on the Optical Services Modules
Information About Any Transport over MPLS: Tunnel Selection
This feature allows you to specify the path that Any Transport over MPLS (AToM) traffic uses. You can
specify either a Multiprotocol Label Switching (MPLS) Traffic Engineering tunnel or a destination IP
address and Domain Name System (DNS) name. 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) used for signaling. This option is enabled by default; you must explicitly disable it.
specify either a Multiprotocol Label Switching (MPLS) Traffic Engineering tunnel or a destination IP
address and Domain Name System (DNS) name. 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) used for signaling. This option is enabled by default; you must explicitly disable it.
How to Configure Any Transport over MPLS: Tunnel Selection
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Configuring Any Transport over MPLS: Tunnel Selection
You configure tunnel selection when you set up a pseudowire class. You enable tunnel selection with the
preferred-path command. Then you apply the pseudowire class to an interface that has been configured
to transport AToM packets.
preferred-path command. Then you apply the pseudowire class to an interface that has been configured
to transport AToM packets.
The following guidelines provide more information about configuring tunnel selection:
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The preferred-path command is available only if the pseudowire encapsulation type is MPLS.
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This feature is enabled when you exit from pseudowire submode.
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The selected path should be a label switched path (LSP) destined to the peer PE router.
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The selected tunnel must be an MPLS TE tunnel.
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If you select a tunnel, the tunnel tailend must be on the remote provider edge (PE) router.