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Backup Interfaces supported across a 4506 VSS?

Hi there,

Just  having some issues getting a Backup Interfaces working across a 4506 VSS, where  the active a backup interfaces are on different physical chassis  members.

Even  though the backup interface is patched and the remote switch is showing  the link as being up, cannot ping to the upstrem router.

CRS01#sh backup

Primary Interface   Secondary Interface   Status

-----------------   -------------------   ------

GigabitEthernet1/4/1GigabitEthernet2/4/1  normal operation

CRS01#sh ip int bri | i standby

GigabitEthernet2/4/1   172.18.0.5      YES manual standby mode          down

CRS01#sh ip int bri | i GigabitEthernet1/4/1

GigabitEthernet1/4/1   172.18.0.5      YES NVRAM  up                    up

CRS01#sh run int gi1/4/1

Building configuration...

Current configuration : 155 bytes

!

interface GigabitEthernet1/4/1

description Default Router

no switchport

backup interface GigabitEthernet2/4/1

ip address 172.18.0.5 255.255.0.0

end

CRS01#sh run int gi2/4/1

Building configuration...

Current configuration : 125 bytes

!

interface GigabitEthernet2/4/1

description Default Router (Backup)

no switchport

ip address 172.18.0.5 255.255.0.0

end

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