[c-nsp] ASR9K to ASR920 MPLS issue

Jerry Bacon jerryb at startouch.com
Tue Jan 5 14:32:07 EST 2021


The VC is UP/UP/UP on both sides, and the MTU does match (it doesn't 
come up if they don't). The only odd thing that I see, is on the ASR920 
the interworking type is "Ethernet" and on the ASR9K it's "none" (and it 
doesn't support Ethernet). On the ASR920:

Local interface: Te0/0/25 up, line protocol up, Eth VLAN 95 up
   Interworking type is Ethernet
   Destination address: 10.100.25.11, VC ID: 95, VC status: up

     MPLS VC labels: local 1631, remote 256476
     Group ID: local 31, remote 67109312
     MTU: local 9100, remote 9100

VPWS name: test1, State: UP
   Te0/0/25                       Te0/0/25:95(Eth VLAN) 0     UP  UP
   pw100038                       10.100.25.11:95(MPLS) 0     UP  UP

-- 

Jerry Bacon
Senior Network Engineer
StarTouch, Inc.
http://www.startouch.com
360-543-5679 ext. 111
Microwave - Fiber Optics - Internet Services

On 1/5/2021 11:03 AM, Emille Blanc wrote:
> We have had problems with MPLS VC's on ASR's in the past, if the MTU on both sides don't match.
> Though the behavior is erratic - sometimes the VC comes up and won't pass traffic, sometimes it doesn't come up at all.
>
> We've also never tried an xconnect on an ASR physical interface. Though I don't have any reason to suspect it wouldn't work, try an untagged service instance?
>
> Do all three VC segments show up/up on the 920?
> (sh xconnect int Ten0/0/25)


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