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BGP Sessions on router

Hi all, I am wandering, if the worry is having to many BGP Sessions on Router A, is there are any difference between the following 2 scenarios? If there are no differences, is there a BGP feature that helps overcoming this problem?

Scenario 1:

Scenario 1.PNG

Scenario 2:

Scenario 2.PNG

 Thanks in advance for any help

 

Davide

 

 
 

 

 

1 Accepted Solution

Accepted Solutions

Georg Pauwen
VIP Master VIP Master
VIP Master

Hello,

 

since these are all eBGP session, the only thing I could think of are peer groups. Route Reflectors and Confederations won't help (and work), since there is no need for a full mesh in eBGP.

 

https://networklessons.com/bgp/bgp-peer-groups-on-cisco-ios

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6 Replies 6

MHM Cisco World
Advisor
Advisor

Vpnv4 is better 

config one bgp between routers and inject vrf route 

balaji.bandi
VIP Community Legend VIP Community Legend
VIP Community Legend

If the peers are many suggested to use RR ( Route Reflector) for redundancy. with BGP vpnv4

 

example : vpnv4

 

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-16/irg-xe-16-book/bgp-vrf-aware-conditional-advertisement.html

BB

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Thanks, the fact is that routers B,C,D will have eBGP sessions with router A, that's why I was wondering if there are any similar features like Route Reflector to use for eBGP.

 

Many thanks

 

David 

balaji.bandi
VIP Community Legend VIP Community Legend
VIP Community Legend

Router A  is your control, you can also look templates.

 

BB

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Georg Pauwen
VIP Master VIP Master
VIP Master

Hello,

 

since these are all eBGP session, the only thing I could think of are peer groups. Route Reflectors and Confederations won't help (and work), since there is no need for a full mesh in eBGP.

 

https://networklessons.com/bgp/bgp-peer-groups-on-cisco-ios

 

Many thanks Georg, very helpful 

 

Davide

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