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[mpls] Comments for fastreroute-mib-04

  • From: "Thomas D. Nadeau" <tnadeau@cisco.com>
  • Date: Wed, 7 Dec 2005 09:17:23 -0500
  • Cc: mpls@ietf.org
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On Nov 29, 2005, at 9:06 PM, Ken Nagami wrote:

> Dear authors and all,
>
> I have a following comment for the FRR MIB (draft-ietf-mpls- 
> fastreroute-mib-04).
> Could you reflect this comment in the document?
>
> Comment:
> I would like to get a 2nd label of a bypass tunnel at a PLR in the  
> facility backup.
> I think a pointer of 1st (top) label of the bypass tunnel at a PLR  
> can be get from the FRR MIB.
> But the 2nd label can not be get.
>
> Because I would like to check a 2nd label of a bypass tunnel and an  
> incoming label at the MP.
> In the case of the node protection, two label values are normally  
> the same.
> But if a router has a bug, the value might be different.
> So, we would like to check those values before local repair from a  
> network management box.

	The MPLS-FRR-MIB provides a reference back to the TE tunnel
in the MPLS-TE-STD-MIB which can be used to find the LSP that
is in use for that tunnel head. From the tunnelEntry in the MPLS-TE- 
STD-MIB
you can get the Cross-Connect (XCindex) of the LSP that is in use for  
that
tunnel head from the MPLS-LSR-STD-MIB, which will have a corresponding
mplsLabelStackTable entry that should have the extra label
shown under the top label shown in the mplsInSegmentTable.

	--Tom



> Regards,
>
> Ken Nagami
>
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