I have designed a two router (6509) environment with multiple VLANs. To load balance I have split the VLAN (odd/even) between the 6509s. The 6509s are connected via a unique Layer 3 trunk. EIGRP is being used.
As I understand it, when I detach an uplink from a VLAN, the interface on its 6509 will drop and the routing entry will be dropped on that router. If it turns out that this was the Active Router, the Standby will take over.
Now in a ODD/EVEN VLAN split, if I drop an interface on a STANDBY router, all VLANs that use this router as the ACTIVE will NOT see a route to the detached VLAN. The route table will show no entry as the interface is down, even thought the VLAN is active on the other router.
Assuming I am correct in this discription (in tests we lost connectivity when the standby interface was pulled), how do I get EIGRP to see there is a route to the "missing" VLAN via the other router?