Re: extended communities sent by default?

understand the un-related RD/RT part.

my question is on the RT "if like you guys suggest the extended communities
value is not being sent or received, then how do I get vrf A's route from
R1 to R2 as is being done here?"

On 1 March 2013 01:44, Marko Milivojevic <markom_at_ipexpert.com> wrote:

> I have to admit, I'm not 100% sure what your question is :-)
>
> RD and RT are unrelated. RT is a community (an attribute) that exists
> on a route. What you are seeing could be just routers perception of
> it's local BGP table and not necessarily what's being advertised. You
> can always capture the packets with Wireshark to confirm what's
> happening.
>
> --
> Marko Milivojevic - CCIE #18427 (SP R&S)
> Senior CCIE Instructor / Managing Partner - IPexpert
>
> On Thu, Feb 28, 2013 at 2:49 PM, Tony Singh <mothafungla_at_gmail.com> wrote:
> >
> >
> > here's what I don't understand
> >
> > if a vrf is defined under ipv4 unicast then how is the RT value
> propergated
> > in order for export to be achieved as I'm seeing the desired routes in
> the
> > vrf tables ok at both ends
> >
> > the RD is part of the NLRI to make ip prefix unique right...
> >
> > now if what your saying is true then extended communities is where this
> > attribute is carried/exported and if it doesn't send them why am I see
> the
> > desired routes in the vrf routing table?
> >
> > thanks for you time Marko
> >
> >
> > Tony
> >
> >
> >
> > On 28 February 2013 20:36, Marko Milivojevic <markom_at_ipexpert.com>
> wrote:
> >>
> >> Are you actually seeing these communities being received on the other
> >> side? This could be just a cosmetic display of which route is being
> >> advertised to help you ID it in the local BGP table. I'd have to lab
> >> it up myself, but AFAIK, unless you actually configure "neighbor
> >> send-community", communities are not being send (barring the exception
> >> of VPNv4/6, where extended communities are always sent)
> >>
> >> --
> >> Marko Milivojevic - CCIE #18427 (SP R&S)
> >> Senior CCIE Instructor / Managing Partner - IPexpert
> >>
> >> On Thu, Feb 28, 2013 at 11:48 AM, Tony Singh <mothafungla_at_gmail.com>
> >> wrote:
> >> >
> >> > router bgp xxxx
> >> > bgp log-neighbor-changes
> >> > timers bgp 10 30
> >> > neighbor x.x.x.x remote-as xxxx
> >> > neighbor x.x.x.x shutdown
> >> > neighbor x.x.x.x password
> >> > neighbor x.x.x.x remote-as xxxx
> >> > neighbor x.x.x.x password
> >> > neighbor x.x.x.x remote-as xxxx
> >> > neighbor x.x.x.x password
> >> > !
> >> > address-family ipv4
> >> > neighbor x.x.x.x activate
> >> > neighbor x.x.x.x activate
> >> > neighbor x.x.x.x next-hop-self
> >> > neighbor x.x.x.x activate
> >> > no auto-summary
> >> > no synchronization
> >> > network x.x.x.x mask 255.255.255.192 route-map Not-Prefer
> >> > network x.x.x.x mask 255.255.255.192 route-map Not-Prefer
> >> > network x.x.x.x mask 255.255.255.192 route-map Not-Prefer
> >> > network x.x.x.x mask 255.255.255.128 route-map Prefer
> >> > network x.x.x.x mask 255.255.255.252 route-map Not-Prefer
> >> > network x.x.x.x mask 255.255.255.252 route-map Prefer
> >> > network x.x.x.x mask 255.255.255.248 route-map Prefer
> >> > network x.x.x.x mask 255.255.255.252 route-map Prefer
> >> > network x.x.x.x mask 255.255.255.252 route-map Not-Prefer
> >> > exit-address-family
> >> > !
> >> > address-family ipv4 vrf Customer
> >> > neighbor x.x.x.x remote-as xxxx
> >> > neighbor x.x.x.x password
> >> > neighbor x.x.x.x activate
> >> > no synchronization
> >> > network x.x.x.x mask 255.255.255.252
> >> > exit-address-family
> >> >
> >> > clear ip bgp *
> >> >
> >> > *Feb 28 19:35:48.607: BGP(0): x.x.x.x send UPDATE (prepend, chgflags:
> >> > 0x10860) x.x.x.x , next x.x.x.x, metric 100, extended community
> >> > RT:300:300
> >> > *Feb 28 19:35:48.607: BGP(0): x.x.x.x send UPDATE (prepend, chgflags:
> >> > 0x820)
> >> > x.x.x.x , next x.x.x.x, metric 100, extended community RT:300:300
> >> >
> >> > *Feb 28 19:35:31.651: BGP(0): x.x.x.x send UPDATE (prepend, chgflags:
> >> > 0x820) x.x.x.x , next x.x.x.x metric 100, extended community
> >> > *Feb 28 19:35:31.651: BGP(0): x.x.x.x send UPDATE (prepend, chgflags:
> >> > 0x820)
> >> > x.x.x.x next x.x.x.x metric 100, extended community
> >> >
> >> >
> >> >
> >> >
> >> > On 28 February 2013 07:33, Marko Milivojevic <markom_at_ipexpert.com>
> >> > wrote:
> >> >>
> >> >> Can you please post your configs?
> >> >>
> >> >> --
> >> >> Marko Milivojevic - CCIE #18427 (SP R&S)
> >> >> Senior CCIE Instructor / Managing Partner - IPexpert
> >> >>
> >> >> On Wed, Feb 27, 2013 at 11:25 PM, Tony Singh <mothafungla_at_gmail.com>
> >> >> wrote:
> >> >> > Yuri
> >> >> >
> >> >> > The config is under ipv4 vrf trust me ;)
> >> >> >
> >> >> > No vpnv4 configured!
> >> >> >
> >> >> > Tony
> >> >> >
> >> >> > --
> >> >> > BR
> >> >> >
> >> >> > Sent from my iPhone on 3
> >> >> >
> >> >> > On 28 Feb 2013, at 06:50, Yuri Bank <yuribank_at_gmail.com> wrote:
> >> >> >
> >> >> >> Those look like SAFI128/vpnv4 UPDATE messages, in which case your
> >> >> > configuration under "address family ipv4 unicast vrf" would have no
> >> >> > impact.
> >> >> >>
> >> >> >> Extended communities would be required under 'address family
> vpnv4'
> >> >> >>
> >> >> >> -Yuri
> >> >> >>
> >> >> >> On Wed, Feb 27, 2013 at 2:59 PM, Tony Singh <
> mothafungla_at_gmail.com>
> >> >> >> wrote:
> >> >> >> Hi Experts
> >> >> >>
> >> >> >> I have a doubt about this as without neighbor x.x.x.x
> send-community
> >> >> >> both I
> >> >> >> am seeing propagation.
> >> >> >>
> >> >> >> Configuration is under ipv4 unicast vrf
> >> >> >>
> >> >> >> Feb 27 22:58:27.223: BGP(0): x.x.x.x send UPDATE (prepend,
> chgflags:
> >> >> >> 0x0) x.x.x.x , next x.x.x.x , metric 0, extended community
> >> >> >> RT:300:300
> >> >> >> Feb 27 22:58:27.223: BGP(0): x.x.x.x send UPDATE (prepend,
> >> >> >> chgflags:
> >> >> >> 0x0) x.x.x.x , next x.x.x.x , metric 0, extended community
> >> >> >> RT:300:300
> >> >> >>
> >> >> >>
> >> >> >> Cisco IOS Software, 2800 Software (C2800NM-ADVENTERPRISEK9_SNA-M),
> >> >> >> Version
> >> >> >> 12.4(24)T2, RELEASE SOFTWARE (fc2)
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >> BR
> >> >> >>
> >> >> >> Tony
> >> >> >>
> >> >> >>
> >> >> >> Blogs and organic groups at http://www.ccie.net
> >> >> >>
> >> >> >>
> >> >> >>
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Received on Fri Mar 01 2013 - 01:54:50 ART