02-16-2011 04:28 AM
hi i am having one link mpls with internet (primary) (e0/0)-10.1.1.1 and secound link point to point serial (s0/0) i want to do redundancy between two links
but problem is mpls link never shows down . so if mpls fails then my point to point should be up please Find Attach file.
can i get confuration according to my e.g. drawing
as per my knowledge ip sla track command is thier but i dont know exact command.
02-28-2011 12:35 AM
Hi,
You are right...You should use IP SLA to track the primary link (ISP side IP)....
Try these...
!
track 125 ip sla 10 reachability
delay down 15 up 10
!
ip sla 10
icmp-echo 4.2.2.2 (change this with the exact IP) source-interface Dialer1
threshold 40
!
If it doesn't work, just tewak some parameters..Some the methodilogy remain same..
Good Luck !!!!
02-28-2011 02:35 AM
Hi,
Why not IGP, like OSPF; you must be using IGP protocol between both points, you can do it with IGP.
03-18-2011 12:20 AM
Hi Yasir,
I am guessing IGP won't work here becoz the primay link is MPLS with ethernet handoff.So if anything goes wrong with MPLS cloud your ethernet link will still show UP if the lastmile of SP is UP?? Can you make it clear!!
thanks
-bava-
03-18-2011 12:44 AM
You can use OSPF fast hello feature to detect the neighbor down quickly, so whenever your MPLS link will go down, ospf will detect the neighbor down and reroute the traffic.
03-29-2011 11:35 PM
Hi,
You could consider running a routing protocol with BFD, which supports very fast event down detection.
This is recommended over using fast hello's in OSPF or ISIS.
Thanks,
Luc
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