Re: mpls ldp sync

The draft for mpls-ldp sync was only put out December of last year...
So the first thing I'd look at is whether the JUNOS release you are
using supports it or not.

The other thing I'd look at is whether you're using standard LDP
(router-id as source) or transport/interface address for binding.
Because the LDP Sync process looks at the peers' address and whether
it's out the same interface or not from what I've read (haven't played
with it).

So those are the first two things I'd look at! Black holes (at least
unplanned ones) aren't particularly cool. :)

But the fact that OSPF isn't coming up tells me it's an unsupported
capability on the version of JUNOS that you are using.

*Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider) #4713,

JNCIE-M #153, JNCIS-ER, CISSP, et al.

JNCI-M, JNCI-ER

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ALL From_NJ wrote:
> If this is production, I am not sure this mailer is your best bet.
>
> I assume you have MPLS running fine between the two. Using LDP autoconfig?
>
>
> Are there any issues w/ LDP peers, and does it come back up after you enable
> this this command? If IOS thinks the LDP peering relationship is down, then
> you will not forward traffic through this interface ... which would be a
> good thing!!! We do not like black holes ...
>
> Once you have asked the IGP and MPLS to be in sync, then this is what will
> be required. Now step back a bit ... if the IGP will not forward traffic
> through an interface, how will your routers know how to get to their LDP
> peers? Have you changed the default peering address and does the router
> require a route lookup to find out reachability? Are these being routed
> somewhere else once you add this command ... humm ...
>
> There are also some caveats related to NSF, and I am not too familiar with
> these ... and I would suggest calling TAC. Especially if this is production
> related
>
> Good luck,
>
> Andrew Lee Lissitz
>
>
>
>
>
> On Thu, Sep 3, 2009 at 1:28 PM, jack daniels <jckdaniels12_at_gmail.com> wrote:
>
>
>> I'm in middle of a issue , request your help in this
>>
>> issue -
>>
>> We have a GSR 12416 connected to JUNIPER router.
>> We are running OSPF between them.
>> OSPF neighbourship comes up :) ....
>> BUT now when I enable under ospf "mpls ldp sync" --- ospf neighbourship
>> goes
>> down and doesn't comes up. Request your help in this.
>>
>> Regards
>> J.Daniels
>>
>>
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Received on Thu Sep 03 2009 - 18:47:14 ART