BGP Community Strings Scrambled in IOS 15.0(1)M6

[NPT_2]

I decided to upgrade to IOS 15.0(1)M6 on one of our 7206VXR's. All went well, other than one thing. I'm noticing my BGP communities are not listed right in my config. For example:

If I put: set community 2828:1507 in my under a route map,

it changes in my show run to:

set community 185337108

I'm not sure if it is scrambling my actual config or just hiding my set community strings. Have you seen this in 15.0?  I'm not sure if this is impacting how my community strings are actually sent or if this is asthetic only. 

Any Thoughts? 

Jim

[Amit Aneja · Accepted solution]

Try using "ip bgp community new-format"

[Amit Aneja · Accepted solution]

From command ref:

To display BGP communities in the format AA:NN (AS-community number/2-byte number), use the

ip bgp-community new-format

command in global configuration mode.

RFC 1997, BGP Communities Attribute specifies that a BGP community is made up of two parts that are 2 bytes long. The first part is the autonomous system number and the second part is a 2-byte number. In the most recent version of the RFC, a community is of the form AA:NN. The Cisco default community format is one 32-bit number. The

ip bgp-community new-format

command changes the community format to AA:NN to conform to RFC 1997.

[NPT_2]

Exactly what I needed, fixed the issue.  Thank You

[Peter Paluch · Accepted solution]

Jim,

Try using the global configuration command

ip bgp new-format

Let me know if it helped. And also let me know if it didn't

Best regards,

Peter