Mpls Oam Support For Bgp 3107 - Cisco ASR 9000 Series Configuration Manual

Implementing MPLS OAM

MPLS OAM Support for BGP 3107

The MPLS OAM Support for BGP 3107 feature provides support for ping, traceroute and treetrace (traceroute
multipath) operations for LSPs signaled via BGP for the IPv4 unicast prefix FECs in the default VRF, according
to the RFC 3107 - Carrying Label Information in BGP-4. This feature adds support for MPLS OAM operations
in the seamless MPLS architecture deployments, i.e., combinations of BGP and LDP signaled LSPs.
IP-Less MPLS-TP Ping and MPLS-TP Traceroute
According to RFC-6426, IP-Less MPLS-TP ping and MPLS-TP traceroute with the ACH header, if a node
receives an MPLS-TP ping or traceroute request packet over ACH, without IP or UDP headers, the node drops
the echo request packet and does not send a response when:
• the reply mode is 4
• the node does not have a return MPLS LSP path to the echo request source.
If a node receives an MPLS echo request with a reply mode other than 4 (i.e., reply via application-level
control channel), the node responds to using that reply mode. If the node does not support the reply mode
requested, or is unable to reply using the requested reply mode in any specific instance, the node drops the
echo request packet and does not send a response.
For more information about ping and traceroute, see Implementing MPLS OAM chapter in the Cisco ASR 9000
Series Aggregation Services Router MPLS Configuration Guide. For more information about ping and traceroute
commands, see MPLS OAM Commands chapter in the Cisco ASR 9000 Series Aggregation Services Router
MPLS Command Reference.
Configure the Ping and Traceroute: Example
This section contains examples of the ping and traceroute commands, based on this topology.
This example shows multiple destinations set on the assigned LSP path.
RP/0/RSP0/CPU0:router# show run int tunnel-mte 10
interface tunnel-mte10
ipv4 unnumbered Loopback0
destination 11.0.0.1
path-option 1 dynamic
!
destination 12.0.0.1
path-option 1 dynamic
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Cisco ASR 9000 Series Aggregation Services Router MPLS Configuration Guide, Release 4.3.x
MPLS OAM Support for BGP 3107
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