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New Member

BGP peer and VRRP

Hi

R1

|

S

/ \

R2 R3

R1 R2 and R3 are on same switch (network) running BGP, R2 and R3 are running VRRP,

My quest is that should R1 make peer with VRRP address or should R1 make peering with both R2 and R3 real addresses.

I just saw some customer configuration making R1 peering with real addresses as well as VRRP address, that makes me confuse that what could be reason of configuring like this.

Regards,

Umair

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: BGP peer and VRRP

Umair,

That is correct. R1 should peer to R2 and R3 physical address so that both session could be up at the same time.

Regards,

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
7 REPLIES
Silver

Re: BGP peer and VRRP

Hi,

R1 must peer with the R2 and R3 real addresses.

The TCP session between the two hosts would not get established if R1 tried to peer with the vrrp address, as R2 and R3 would be sourcing their TCP sessions from their real ip address.

HTH

LR

Cisco Employee

Re: BGP peer and VRRP

Lee,

The session will come up assuming that R1 initiates the session, in which case the router being the primary would reply with the VRRP virtual address rather than the physical address.

The TCP session would obviously need to be reestablished if a VRRP failover takes place.

Regards,

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 peer and VRRP

Original Q: quest is that should R1 make peer with VRRP address or should R1 make peering with both R2 and R3 real addresses

Yes you need to peer with bothe the pysical active and physical standby in order for VRRP to function

Cisco Employee

Re: BGP peer and VRRP

Steven,

I don't see any advantage to use VRRP in this context. VRRP is something that would be used to provide redundancy on a user subnet. Why use VRRP if you have BGP sessions from R1 to both R2 and R3.

Regards,

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 peer and VRRP

I agree, however I was just answering the initial question as to VRRP peering with both routers

New Member

Re: BGP peer and VRRP

VRRP is running because their are some hosts sits on that network connected to switch where BGP is running.

SO what I get from the above thread is R1 must make peers with R2 and R3 Real address but not VRRP address ? right ????

Regards,

Umair

Cisco Employee

Re: BGP peer and VRRP

Umair,

That is correct. R1 should peer to R2 and R3 physical address so that both session could be up at the same time.

Regards,

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
3322
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