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customer sites connectivity spreading to different ISP over inter-AS link based on option C

Marc du
Level 1
Level 1

Hi

Any link or documents shows how to troubleshoot MPLS L3VPN connectivity between customer sites spreading to different ISP over inter-AS link based on option C , all PEs in both ISPs are ASR9K Platform

 

thanks to all and MXMASS

3 Replies 3

blau grana
Level 7
Level 7

http://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/200523-Configuration-and-Verification-of-Layer.html

Best Regards Please rate all helpful posts and close solved questions

Hi Blau

thanks

how can i know that i missed the send-label command on RR towards PE , using any show or debuging command

last time i had tough time to fix that , i revised the config line by line

thanks

Hi,

 

“mpls traceroute” & “show mpls forwarding” will never let you down, 99% of the cases an end-to-end LSP is missing (some router is not advertising labels or not mapping BGP to LDP labels properly).

 

Check if PE loopbacks/RIDs have labels allocated and advertised hop by hop as follows:

In inter-AS scenarios you need to be checking two hierarchies though:

1)

BGP Label mappings for PE-->ASBR-->ASBR-->PE…

2)

IP LDP Label mappings PE-->P-->P-->ASBR in each AS

 

adam

 

netconsultings.com

::carrier-class solutions for the telecommunications industry::

 

adam
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