06-07-2012 08:34 AM - edited 03-04-2019 04:36 PM
I'm trying to see if I can use both ethernet ports on a 2811 to run hsrp for non-stacked dual switch failover. Then link the the NM-32A ports to L0, so the remote access server trying to use them can use the l0 ip and failover much faster (it's programming is limited). This is on IOS 12.4(25)f, though we are moving to 15 soon.
Solved! Go to Solution.
06-07-2012 11:57 AM
Hello pmickelsen,
you cannot run HSRP between two LAN interfaces of the same router, because you cannot configure two IP addresses belonging to the same IP subnet on a single box.
In order to achieve redundancy towards the two unstacked switches you could use IRB integrated Routing Bridging
int eth0
no ip address
bridge-group1
int eth1
no ip address
bridge-group 1
interface BVI1
description layer3 info here
bridge 1 route ip
bridge 1 protocol ieee
Be aware that this configuration will introduce STP IEEE on the router physical interface and router STP will interact wih STP running on the two LAN switches.
One interface will be in STP blocking if STP root bridge is on the LAN switches.
Usually for terminal server the two lan interfaces are configured for two different IP subnets and or static routes or a routing protocol is used to advertise the terminal server loopback address to two different routers or multilayer switches.
Hope to help
Giuseppe
06-07-2012 11:57 AM
Hello pmickelsen,
you cannot run HSRP between two LAN interfaces of the same router, because you cannot configure two IP addresses belonging to the same IP subnet on a single box.
In order to achieve redundancy towards the two unstacked switches you could use IRB integrated Routing Bridging
int eth0
no ip address
bridge-group1
int eth1
no ip address
bridge-group 1
interface BVI1
description layer3 info here
bridge 1 route ip
bridge 1 protocol ieee
Be aware that this configuration will introduce STP IEEE on the router physical interface and router STP will interact wih STP running on the two LAN switches.
One interface will be in STP blocking if STP root bridge is on the LAN switches.
Usually for terminal server the two lan interfaces are configured for two different IP subnets and or static routes or a routing protocol is used to advertise the terminal server loopback address to two different routers or multilayer switches.
Hope to help
Giuseppe
06-07-2012 04:00 PM
Thank you! Exactly what I was looking for.
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