06-06-2008 12:43 PM - edited 03-05-2019 11:28 PM
I'm designing and configuring a new network and I would like to connect one router with two interfaces to the same spanning tree domain (a couple of switches). A third interface is going to another subnet.
I would like to have the two interfaces to be redundant and provide subsecond failover. So a BVI with spanning tree on the router is not really an option.
Is it possible to configure redundant interface pairs like ASA 8.0 on a router? Or is there another way to accomplish this?
06-06-2008 12:50 PM
So two router interfaces connected to the same switch? or each router interface connected to a different switch?
06-07-2008 07:06 AM
The two interfaces are connected to different switches, but connected to the same layer 2 domain / vlan / spanningtree domain.
06-07-2008 08:03 AM
You could do it with bridging on the router:
bridge 1 protocol ieee
bridge irb
!
interface FastEthernet0/1
bridge-group 1
!
interface FastEthernet0/2
bridge-group 1
!
interface BVI 1
ip address 10.1.1.1 255.255.255.0
!
HTH
Andy
06-07-2008 08:19 AM
Yes this is an option, but I would like to have subsecond failover between the links.
Is it possible to configure uplink fast between these links?
06-07-2008 08:38 AM
You could tune STP to try and achieve these kinds of times, however I think you want to be looking at alternative designs.
Dual routers running HSRP/GLBP is where I would be looking.
Andy
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide