"address-family ipv4 unicast" is necessary?

[wfqk]

Hi The below is bgp configuration in Nexus7k. Do you think it is necessary to use address-family ipv4 unicast? The address-family ipv4 has three choices. The unicast is one of the three. unicast is considered as by default. I mean even if we do not use it, it already is unicast. Any one can explain it? Thank you

router bgp 6112

  log-neighbor-changes

  address-family ipv4 unicast

  vrf ABC

    local-as 65111

    log-neighbor-changes

    address-family ipv4 unicast

[Philip D'Ath]

I think it puts in "address-family ipv4 unicast" anyway, so I think it is a moot point.

[nspasov]

You can remove this command but then you would have to manually "activate" neighbors for the ipv4 address family. There is a very good post about this in the community:

https://supportforums.cisco.com/discussion/11476526/when-use-bgp-address-family

I hope this helps!

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