BGP 4-Byte AS Number

Answered Question
Apr 26th, 2010
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Hi,


recently i got my AS number 196921. But in Router when ever i issue the command: router bgp?--> it shows only 1-65535.


Can someone suggest me how to enable this AS number 196921 to my Router?


The IOS that i am using it supports 4-Byte AS number.


Rgds,


Partha

Correct Answer by csawest.dc about 7 years 2 months ago

Dear Friend,



Pl see :


http://as4.nullroute.se/index.php



Cheers!!!



Vaib...

Correct Answer by csawest.dc about 7 years 2 months ago

Dear Friend,


U need to configred 4 byte ASN in doted


Your BGP : 196921 is in plain notation, converting to asdot:


ASN: 3.313


router bgp 3.313




Cheers!!!



Vaib...

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lamav Mon, 04/26/2010 - 15:18
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What model router and what version of IOS are you running?


Victor

acharyr123 Mon, 04/26/2010 - 22:04
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I am using 7609-S Router having IOS 12.2.33 SRE1.




Rgds,


Partha

Giuseppe Larosa Tue, 04/27/2010 - 01:03
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Hello Partha,

according to cisco feature navigator BGP 4 byte AS number should be supported on several 12.2(33)SRE1 IOS images if you have a sup720 or an RSP 720 or a Sup 32


http://www.cisco.com/go/fn


search by feature : BGP support for 4-byte ASN


so your question is wise


the configuration may need to use a dotted notation like


router bgp x.y


so you need to calculate x and y so that x*65536 + y = ASN


this is called AS DOT notation


see

http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6554/ps6599/4byte_asnios.pdf


Hope to help

Giuseppe

Correct Answer
csawest.dc Tue, 04/27/2010 - 06:49
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Dear Friend,


U need to configred 4 byte ASN in doted


Your BGP : 196921 is in plain notation, converting to asdot:


ASN: 3.313


router bgp 3.313




Cheers!!!



Vaib...

acharyr123 Tue, 04/27/2010 - 08:01
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So you mean to say that, As plain format is not going to work??




Rgds,


Partha

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