Cisco 1841 & 2800 series router

[rameshtall]

Hi,

1. We have 2 routers with 2 different MPLS service providers BSLN in 1841 & Airtel in 2800. These two routers running in HSRP.
2. In an remote location We have Juniper SRX210 firewall come router & Cisco 1841 router is present where Airtel is primary in Juniper and BSNL is secondry in Cisco configured as VRRP.
3. Now when the primary link down in remote location the secoundry takes care of the routing, but the problem 
we are facing is when above scenario happens the user's in the remote location are not able to access their ERP server in the HO through the secoundry link.

Please kindly help us on this issue. If required i will give the network diagram and other details.

Thanks
Ramesh S \ 9600537601

[Flintstone]

Hi rameshtall,

It sounds like your primary site is using one service provider and the remote site is using the other service provider when the primary link is down.  So you will not be able to communicate.  I believe both sites need to be using the same service provider?

CheerZ

[Kaya ATABEY]

details needed.

1- If point-to-point does this links redundancy are also provided by service providers (via bgp). By this i mean are ISPs aware of each other? Or you just bought two links from two isps?
2- What type of routing algorithm runs between these points? dynamic or static?

If you answer these correctly we may help you.

I ll try to provide you with the worst case scenario. You have point to point links with no ISP redundancy and you run static routing between these routers. If this is the case and if you plug out the primary routers wan connection. By means of VRRP router is still there so it will still be the gateway.

But since it's mpls connection is down it won't be able to route the traffic to your main site. Route of main routers won't go down because MPLS connection doesn't have any OAM so router won't understand that MPLS interface is down.

What you have to do is use tracking in all routers and track the routes referring your other site. And write high metric altarnate routes to neighboring secondadry router. If wan connection fails in one router the route for wan connection will be down and secondary route will kick in. it will forward all the traffic to neighboring router and that router will forward all the trafic to other site. When main connection is back low metric router will kick back in and you ll turn normal.

Or try using dynamic algorithms like ospf.

Remember:

VRRP and HSRP are only redundancy for local connection. It does not support WAN redundancy.

[rameshtall]

Hi,

Thanks for the reply,

1. we are having two different ISP.
2. static routing is we are using.

Cheers
Ramesh