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Community Member

Route tag size

Hi All,

I have a doubt regarding the route tag size used by different routing protocols. As per I know EIGRP, OSPF & BGP use 32 bit tags but the below document by cisco says RIP V2 uses a 16-bit tag:

http://docwiki.cisco.com/wiki/Routing_Information_Protocol

Can somebody please clarify if the route tag size is same for all routing protocols or is it different?

Thanks a lot in advance

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Hall of Fame Super Silver

Route tag size

Hello Pradeep,

route tag size is not the same for all protocols as you noted.

RIPV2 and may be ISIS should have a 16 bit route tag field, other protocols have a 32 bit route tag field as you have noted

This has to be taken in account in multi protocols scenarios.

Hope to help

Giuseppe

2 REPLIES
Hall of Fame Super Silver

Route tag size

Hello Pradeep,

route tag size is not the same for all protocols as you noted.

RIPV2 and may be ISIS should have a 16 bit route tag field, other protocols have a 32 bit route tag field as you have noted

This has to be taken in account in multi protocols scenarios.

Hope to help

Giuseppe

Community Member

Route tag size

Thanks a lot Giuseppe!

That really helped!

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