The MPLS-OPS Archive

["Gopal@Yahoo" <gnaganab@yahoo.com>]

>From 3031, 
4.1.2.2. Distributing Labels
:
:
   These rules ensure that labels corresponding to
address prefixes which correspond to BGP routes are
distributed to IGP neighbors if and only if the BGP
routes are distributed into the IGP.  
:
:

--- Vishal M <vishal_study@yahoo.com> wrote:
> 
> Hi,
> 
> I have a question on LDP DU configuration for Cisco
> GSR (running IOS 12.0 (14)ST).
> 
>      ------ eth0---Cisco-----gigEth-----RTR_A
> 
> 1. Cisco learns some BGP prefixes via intf eth0.
> 2. LDP is enabled between Cisco and RTR_A on intf
> gigEth.
> 3. I notice that Cisco just advertises LDP bindings
> for static/loopback/connected routes to RTR_A. It
> doesn't advertise any LDP mapping for BGP routes.
> 4. There is no ACL prohibiting advertisement of BGP
> prefixes (via mpls ldp advertise-acls cmd). i.e. ACL
> is permitting all to all peers.
> 
> Question:
> 1. Is something missing in the configuration that is
> causing Cisco to *not* advertise LDP mappings for
> BGP
> prefixes to RTR_A ?
> 
> Could someone please give some pointers.
> 
> thanks for your time,
> 
> Regards,
> Vishal.
> 
> 
> 
> 
> 
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