07-22-2013 01:05 AM - edited 03-10-2019 12:23 PM
Hello All,
In our environment we are not using the AS number 701, but I'm not sure why I'm seeing the AS number 701 while tracing the path.
1 10.97.61.53 [AS 701] 4 msec 0 msec 0 msec
2 10.97.61.65 [AS 701] 4 msec 0 msec 0 msec
3 10.30.2.105 [AS 701] 0 msec 0 msec 0 msec
4 * * *
5 152.185.36.53 [AS 701] [MPLS: Label 33225 Exp 0] 224 msec 240 msec 244 msec
6 152.185.36.54 [AS 701] 220 msec 220 msec 220 msec
7 10.30.40.82 [AS 701] 224 msec 220 msec 228 msec
8 10.73.0.238 [AS 701] 224 msec -
10.73.0.29 [AS 701] 224 msec
10.73.0.238 [AS 701] 240 msec
9 10.73.0.21 [AS 701] 232 msec
10.73.0.33 [AS 701] 228 msec 224 msec
10 10.73.191.82 [AS 701] 220 msec 220 msec 220 msec
11 10.73.191.38 [AS 701] 220 msec * 220 msec
Can any body help me to understand the AS number 701 in the path?
Regards,
Thiyagu
07-22-2013 01:12 AM
Hi Thiyagu,
Your router must somehow believe that the route belongs to AS 701... Can you execute the following command and post back the results?
show ip bgp 10.73.191.38 bestpath
Thanks!
Best regards,
Peter
07-22-2013 07:38 AM
Hi Rajan,
It can be a service provider issue.Is this link connected to verizon(AS701)....Please check above command given by peter that could help if routes are learned from verizon.
BRegards
Mukul
07-22-2013 08:16 AM
Thanks all for your reply.
#show ip bgp 10.73.191.38
BGP routing table entry for 0.0.0.0/0, version 21
Paths: (2 available, best #2, table Default-IP-Routing-Table)
Multipath: eBGP iBGP
Advertised to update-groups:
2 3
64681 65232 6523 65332 701, (received & used)
10.97.159.253 (metric 2) from 10.97.159.253 (10.97.159.253)
Origin IGP, metric 0, localpref 100, valid, internal
64681 65232 6523 65332 701, (received & used)
10.97.61.53 from 10.97.61.53 (10.97.61.126)
Origin IGP, localpref 100, valid, external, best
I'm seeing the AS number 701 in the path. I'm wondering for an Intranet subnet why public AS is comming?
Will there be any issue because of this ? If so how can I resolve that?
Regards,
Thiyagu
07-22-2013 08:30 AM
Hi Thiyagu,
You will need to trace it back to the router originating the route as this router seems to be using AS701. The proper way to handle it would be to use a private AS number on the originating router.
Regards
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