Re: Link Status

  Hi,

In MPLS network there are couple of reachability failure options.

    * Interface of my router goes down
    * next hop not reachable- MPLS Provider
    * Somewhere in between on MPLS cloud

What if Interface of my router facing SP is up and reachable but cannot
reach my other end. Problem could be in SP or problem could be my other
end.
How would NMS behave in this situation?

Thanks
Asif

On 8/22/2010 4:37 AM, Adam Booth wrote:
> Hi Asif,
>
> There's more than one way to do it but one method I would consider
> suggesting is to look at IP SLA ICMP tests between the interfaces of
> you routers that are facing the SP MPLS network and your NMS uses the
> RTTMON SNMP MIB to verify connectivity.
>
> This is the guide on CCO about IP SLA ICMP echo operations
> http://www.cisco.com/en/US/docs/ios/12_4/ip_sla/configuration/guide/hsicmp.html
> This should be the MIB of interest
> http://tools.cisco.com/Support/SNMP/do/BrowseMIB.do?local=en&mibName=CISCO-RTTMON-MIB
> <http://tools.cisco.com/Support/SNMP/do/BrowseMIB.do?local=en&mibName=CISCO-RTTMON-MIB>
> for your NMS to query
>
> Cheers,
> Adam
>
>
> On Sun, Aug 22, 2010 at 5:53 AM, Asif Vanoo <asif_at_vanoo.net
> <mailto:asif_at_vanoo.net>> wrote:
>
> Hi GS,
>
> Got a Question,I got this scenario
>
> Loc_A connects to Loc_B with P-2-P 10Mb link as primary and MPLS
> link as backup link.
> NMS is located at Loc_A which monitors both links ( P-2-P & MPLS )
> and on both location Routers.
> OSPF is the routing protocol
> MPLS is via a Service provider
>
> How can I identify my MPLS link is up and reachable till Loc_B
> when P-2-P link is up??
>
> Thanks
> Asif
>
>
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Received on Sun Aug 22 2010 - 10:16:23 ART