MPLS VPN sub-TLV issue on IOS 15.0(1)

[richlarkins]

We are exercising MPLS ping and traceroute OAM functionality with a Cisco router.    One of the issues we are seeing is an unsupported TLV stack problem.    Has anyone else seen this, or is it a bug?

When sending an MPLS Ping Echo request to a Cisco MPLS Router and when the Target FEC Stack TLV contains a VPN FEC sub-TLV, Cisco doesn’t recognize the VPN sub-TLV. It complains: “Unsupported Target FEC stack subtlv 0x6”.  There is no problem when the sub-TLV if of type LDP FEC.

Cisco version info:

Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 15.0(1)M2, RELEASE SOFTWARE (fc2)

Any ideas?

Thanks in advance.

--Rich

[Nagendra Kumar Nainar]

Hi Rich,

Currently in Cisco IOS, subtlv 6 and 7 are not supported. You may have to verify the LSP between PE devices using LDP FEC.

Regards,

Nagendra