MPLS VPN iBGP and MPBGP neighborship?

[mukupatil]

In MPLS VPN I see the BGP and MP-iBGP neighborship, however I can disable IPv4 iBGP session with below cofiguration.

Question: What is the pros or (if any) cons of below configuration?

router bgp xxx

  neighbor x.x.x.x remote-ad xxx

  no neighbor x.x.x.x activate

!

Thanks in advance

[Mohammed Imran Khan]

Hi,

In case of providing the MPLS L3VPN services, you dont need the address-family ipv4, as the service will use VPNv4. Therefore, rather than removing these addresses individually, use "no bgp default ipv4-unicast". This will disable the ipv4 address-family "by default". As soon as any neighbor is configured, ipv4 address-f is by default enabled.

There is no specific pros and cons because it will totally depend on the services.

Regards,

Imran