Re: BGP Address Family

mulitcast and unicast keywords for using that address family for SAFI

good blog post here on using the multicast, to correct rpf failure:

http://blog.ipexpert.com/2010/12/29/multicast-rpf-failure-recovery-using-bgp/

cisco doccd showing the command ref:

http://www.cisco.com/en/US/docs/ios/iproute_bgp/command/reference/irg_bgp1.html#wp1110597

--
Garry L. Baker
"With sufficient thrust, pigs fly just fine..." - RFC 1925
On Sat, Jun 4, 2011 at 5:37 AM, marc edwards <renorider_at_gmail.com> wrote:
> Thanks for correcting. I only used it for vrf but sounds like I need to
> dive
> deeper
> On Jun 3, 2011 7:35 PM, "Bilal Hansrod" <bilal.hansrod_at_gmail.com> wrote:
> > Thanks Marc,
> >
> > I believe, there are three options with this command (address-family ipv4
> > unicast). i.e.
> >
> > *address-family ipv4* [*multicast* | *unicast* | *vrf* *vrf-name*]
> >
> > If I am only using address-family ipv4 unicast that I am not referencing
> to
> > vrf and essence not using vrf. By researching more and reading this Blog
> (
> >
>
> http://blog.ioshints.info/2008/06/use-explicit-address-family-ipv4-in-bgp.html
> ),
> > I understand it provides easy to read configuration feature if we are
> using
> > all three options such as MPLS VPN, IPv6 or IP Multicast over BGP.
> >
> > Thanks,
> >
> >
> > Bilal Hansrod
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Sat, Jun 4, 2011 at 12:15 PM, marc edwards <renorider_at_gmail.com> wrote:
> >
> >> Will add 32 bits to header to carry vrf information over MPLS backbone.
> >> Essentially that command enables MP BGP
> >> On Jun 3, 2011 6:46 AM, "Bilal Hansrod" <bilal.hansrod_at_gmail.com>
> wrote:
> >> > Hello Team,
> >> >
> >> > I was working on BGP lab and came across multiple address family
> command.
> >> > Can anyone please explain one of the below command and correct other
> two
> >> if
> >> > it is incorrect.
> >> >
> >> > 1. address-family ipv4 unicast - I have disabled this command instead
> of
> >> > disabling no bgp default ipv4-unicast. I didn't see any difference,
> may
> >> be I
> >> > don't know why we need this command.
> >> >
> >> > 2. no bgp default ipv4-unicast - This command is required to disable
> >> normal
> >> > IPv4 adjacency.
> >> >
> >> > 3. address-family vpnv4 unicast - This command will provide mechanism
> to
> >> > carry additional attributes across BGP updates such as RT,SoO,
> Domain-ID,
> >> > metric propagation and make true MP-BGP.
> >> >
> >> > I have seen some past post, but still little bit confused.
> >> >
> >> > Can anyone please shed some light on above points.
> >> >
> >> > Thanks,
> >> >
> >> > Bilal Hansrod
> >> >
> >> >
> >> > Blogs and organic groups at http://www.ccie.net
> >> >
> >> >
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