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BGP Route Refresh

When performing the show ip bgp neighbors command, the command reports different information regarding route refresh. Can you send or point me to documentation that will explain the different outputs below?

Neighbor capabilities:

Route refresh: advertised

Neighbor capabilities:

Route refresh: advertised and received(new)

Neighbor capabilities:

Route refresh: advertised and received(old & new)

In other words, what is the difference of "advertised", "advertise and received(new)" and "advertised and received(old & new)" that is being reported when from a show ip bgp neighbors command?

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: BGP Route Refresh

The old and new is in reference to the pre and post RFC2918 implementation of route-refresh in the IOS.

The advertised and received is in relation to what is supported by each neighbor.

The new mode has been implemented via CSCdr29107.

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
2 REPLIES
Cisco Employee

Re: BGP Route Refresh

The old and new is in reference to the pre and post RFC2918 implementation of route-refresh in the IOS.

The advertised and received is in relation to what is supported by each neighbor.

The new mode has been implemented via CSCdr29107.

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
New Member

Re: BGP Route Refresh

Harold, Thank you for your help. It lead me in the right direction. I reviewed RFC 2918 and looked up the new capability code on the IANA website. Again, thank you.

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