Re: Cannot ping VRF destination

Hi Ovidu and All,
 
The configuration I found out on R6 was this command 'no mpls ldp
advertise-labels', but I still not sure how to troubleshoot this problem.
 
Even if I leave this command on R6 and do the 'sh ip cef vrf VPN_A 155.1.67.0'
I still see the two lables, which is wierd because I know R6 is not
adverstising the lables.

R5#sh ip cef vrf VPN_A 155.1.67.0
155.1.67.0/24
  nexthop 155.1.45.4 Serial0/1/0 label 16 19
R5#

R5#sh ip cef vrf VPN_A 155.1.67.0 detail
155.1.67.0/24, epoch 0
  recursive via 150.1.6.6 label 19
    nexthop 155.1.45.4 Serial0/1/0 label 16
 
Can anyone please tell me how I can troubleshoot on R4 or R5 that R6 is not
advertising the labels for its routes?

Thanks & Regards,
Zubair Ahmad Syed
+44-07881714459

--- On Mon, 23/8/10, Ovidiu Neghina <o.neghina_at_gmail.com> wrote:

From: Ovidiu Neghina <o.neghina_at_gmail.com>
Subject: Re: Cannot ping VRF destination
To: "Prakash Kalsaria" <kalsaria.prakash_at_gmail.com>
Cc: "Garth Bryden" <hacked.the.planet.on.28.8k.dialup_at_gmail.com>, "syed zubair
ahmad" <s_zubair82_at_yahoo.com>, "Eduard Gheorghiu" <edigheorghiu_at_gmail.com>,
"Group Study" <comserv_at_groupstudy.com>, "Group Study"
<ccielab_at_groupstudy.com>
Date: Monday, 23 August, 2010, 7:26

what I found really useful in this connectivity issues is to start
from the bottom - look into the cef vrf table and you will see if the
remote prefix that you are pinging has both labels:
sh ip cef vrf VPN_A 155.1.67.6 detail

br
Ovidiu

On Wed, Aug 4, 2010 at 6:45 AM, Prakash Kalsaria
<kalsaria.prakash_at_gmail.com> wrote:
> Great:)
> Most of time its always a configuration problem
> when u using a real routers rather than dynamips
>
>
>
> regards,
> http://prakashkalsaria.wordpress.com
>
> On Tue, Aug 3, 2010 at 4:18 PM, Garth Bryden <
> hacked.the.planet.on.28.8k.dialup_at_gmail.com> wrote:
>
>> Great, glad u got it!
>>
>> On Tue, Aug 3, 2010 at 6:25 AM, syed zubair ahmad <s_zubair82_at_yahoo.com
>> >wrote:
>>
>> > wohoo solved it guys, it was a configuration fault R6 was not
>> adverstising
>> > the
>> > labes for its local prefixes.
>> >
>> > Thank you all for the helpful responses,
>> >
>> > Regards, Zubair
>> >
>> >
>> > --- On Mon, 2/8/10, Eduard Gheorghiu <edigheorghiu_at_gmail.com> wrote:
>> >
>> > From: Eduard Gheorghiu <edigheorghiu_at_gmail.com>
>> > Subject: Re: Cannot ping VRF destination
>> > To: "syed zubair ahmad" <s_zubair82_at_yahoo.com>
>> > Cc: "Group Study" <comserv_at_groupstudy.com>, "Group Study"
>> > <ccielab_at_groupstudy.com>
>> > Date: Monday, 2 August, 2010, 14:02
>> >
>> > Hi,
>> >
>> > I would do a trace between R5 and R6 loopbacks to see that MPLS is
>> enabled
>> > along the paths (you should see labels on all hops but last).
>> >
>> > R5#trace 155.1.6.6 source 155.1.5.5
>> > R6#trace 155.1.5.5 source 155.1.6.6
>> >
>> > than I would check the CEF on both PEs to see that 2 labels are applied
>> for
>> > the destinations:
>> >
>> > R5#sh ip cef vrf VPN_A 155.1.67.0 detail
>> > R6#sh ip cef vrf VPN_B 155.1.58.0 detail
>> >
>> >
>> > Regards,
>> > Eduard
>> >
>> >
>> > Blogs and organic groups at http://www.ccie.net
>> >
>> > _______________________________________________________________________
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>>
>>
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>>
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>
>
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>
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Received on Mon Aug 23 2010 - 02:07:17 ART