Configuring BGP on 4948

[tdale1987]

Hello,

I have a 4948 running bootflash:cat4500-entservicesk9-mz.150-2.SG11.bin

ARIN just provided me my ASN and im trying to setup BGP or attempt to see how to set it up. In the first step im already at a road block.

hostname(config)#router bgp ?
  <1-65535>  Autonomous system number

My issue is my ASN is over 65535 as we all know those numbers are all taken. I converted my number with the decimal using http://submit.apnic.net/cgi-bin/convert-asn.pl

The issue i have now is it wont take it.

I get the following error:

hostname(config)#router bgp 1.11
                                                  ^
% Invalid input detected at '^' marker.

I'm running a 15.x iOS image so why isnt it accepting it. Can't figure this out. I never setup BGP before so be gentle haha.

Thanks in advance!

[johnd2310]

Hi,

Have you guys tried adding the following command to your bgp configuration:

bgp asnotation dot

thanks

John

[tdale1987]

John,

(config)#bgp asnotation dot
                        ^
% Invalid input detected at '^' marker.

(config)#router bgp asnotation dot
                                  ^
% Invalid input detected at '^' marker.

Its not letting me setup the bgp because i cannot input my as as it is higher than what its allowing me: <1-65535>.

How can i add that to my BGP config if this is my first BGP profile.

Thanks,

Tom

[Jon Marshall]

Tom

The first mention of that feature for your switch is in the following release notes -

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/release/note/OL_26677-01.html

so looks like you need to upgrade.

Jon

[tdale1987]

Jon,

This is for the 4948E. I have the non E series. as you can see in my post im running:

cat4500-entservicesk9-mz.150-2.SG11.bin

if i had the E series i would be running 'cat4500e'

According to Cisco's website these are what i can have:

15.0.2-SG11(MD)
12.2.54-SG1(ED)
12.2.31-SGA11(ED)

These are the "latest releases" for the 4948. Any help on what i need would be greatly appreciated!

Thanks,

Tom

[Jon Marshall]

Tom

I think you may be out of luck because as far as I can tell the same applies to those versions of software  ie. you need a later release.

However I cannot open all the release notes for the versions you list for some reason so here is the link -

http://www.cisco.com/c/en/us/support/switches/catalyst-4500-series-switches/products-release-notes-list.html

and then you can search for "BGP".

I don't think you will find any mention of that feature until you check the release notes for version 15.1(1)SG but you say you cannot use that version with your switch.

Jon

[tdale1987]

Jon,

Bad news, 4-byte ASNs is NOT supported by my switch.

4948 according to the cisco feature list is not listed.Oh cisco why :(

Thanks,

Tom

[Richard Burts · Accepted solution]

Tom

Congratulations on finding the answer to your own problem. And thanks for posting back to the forum confirming that Jon pointed you in the right direction. +5 for you.

HTH

Rick

[tdale1987]

Everyone thank you!

I was able to make a ticket with ARIN and switch my 4-byte ASN for a 2-byte ASN. This solved my issue with BGP but if i was able to switch my ASN i would of had to buy a new switch to do BGP.

Thanks again!