Need the perspective of a Level3 customer.

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1

Can anyone peering with Level3 directly tell me if they are seeing
63.210.162.0/24 coming from the Level3 peer?

Thanks for the help.

Cheers,

2

Can anyone peering with Level3 directly tell me if they are seeing
63.210.162.0/24 coming from the Level3 peer?

Yes, I do.

mh

3

Hi Joe,

#show bgp ipv4 unicast 63.210.162.0/24
BGP routing table entry for 63.210.162.0/24, version 26824780
Paths: (2 available, best #2, table default)
  Advertised to update-groups:
     1
  3356 16582
    195.50.113.161 from 195.50.113.161 (4.68.0.179)
      Origin IGP, metric 0, localpref 100, valid, external
      Community: 3356:3 3356:22 3356:100 3356:123 3356:575 3356:2002
  6461 3356 16582
    79.141.38.194 from 79.141.38.194 (64.125.0.165)
      Origin IGP, metric 28, localpref 150, valid, external, best
      Community: 6461:5997

Hope this helps. :slight_smile:

Tom

4

Thanks again to all who replied... looks like other Level3 customer are
seeing the /24. Looks like the issue is specific to San Diego. Any routing
information from other SD Level3 customer would be appreciated.

Cheers,

Joe

5

Through Level3 (AS3356) Seattle->SJ->LA->SD->nextlevelinternet (AS1658) I can see that announcement.

6

Here is what I am seeing from both of my Level 3 links, hope it helps:

show ip bgp 63.210.162.0
BGP routing table entry for 63.210.162.0/24, version 139413425
Paths: (2 available, best #1, table Default-IP-Routing-Table)
   Not advertised to any peer
   3356 16582
     4.53.6.25 from 4.53.6.25 (4.68.185.104)
       Origin IGP, metric 25753, localpref 100, valid, external, best
       Community: 3833:601
   3356 16582, (received-only)
     4.53.6.25 from 4.53.6.25 (4.68.185.104)
       Origin IGP, metric 25753, localpref 100, valid, external
       Community: 3356:3 3356:22 3356:100 3356:123 3356:575 3356:2002

show ip bgp 63.210.162.0
BGP routing table entry for 63.210.162.0/24, version 148858770
Paths: (2 available, best #1, table Default-IP-Routing-Table)
   Advertised to update-groups:
      1
   3356 16582
     4.53.6.29 from 4.53.6.29 (4.68.185.104)
       Origin IGP, metric 25753, localpref 100, valid, external, best
       Community: 3833:600
   3356 16582, (received-only)
     4.53.6.29 from 4.53.6.29 (4.68.185.104)
       Origin IGP, metric 25753, localpref 100, valid, external
       Community: 3356:3 3356:22 3356:100 3356:123 3356:575 3356:2002

Thanks
Eric Nowland
Engineering Manager
Wyoming.com

7

Thanks for all who assisted me on this issue. Was invaluable to get router
output from all over the country.

Bottom line Level3 had some issues with poking a whole in there
summarization filters. Appeared that the problem was only with peers
connected to the HSA1 and HSA2 routers in San Diego. That is where our
routers are located so looks like a local issue. I did not get a clear
answer for them on the root cause but from what I understand they updated
their summarization policy but did not clear the BGP sessions. Not sure if
anyone else has run into this in the past with Level3. I have worked with
them a couple times previously doing the same thing and had no issue.

Cheers,

Joe