Hi all, I have a pretty weird situation and I'm trying to figure out a work-around for it.
We have 2 Cisco 2821 each equipped with a 16-port switch (Service Module). Both act as gateways to a local network - each LAN device is connected to both Service Modules (bonding interface) and one of the two Gi ports of the each router are connected to one and same ISP. The Service Modules utilize HSRP to provide all LAN devices with a default gateway address. However, the ISP blocks multicast packets on our external interfaces, so the routers cannot talk to each other, hence HSRP is not actually running - both external interfaces claim to be master because no slave can be reached. (The ISP is in Japan and it is difficult to understand why they do so; they have not been very co-operative.) Since the Service Modules are separate entities running their own IOS, the router has no way of tracking the status of the internal interface. My last resort may be to connect the two routers to each other using the available Gi ports on each chassis, then somehow monitor this link (if one of the devices goes down, the link will go down; this is much worse than HSRP, but is still better than nothing) and enable/disable the ISP interface, depending on the status of this link (or may be just bring up and down a secondary IP address). Basically, this means the ability to enable/disable one Ethernet interface depending on the link status of another Ethernet interface. Any ideas how to achieve this (if possible at all) are welcome - up to writing a TCL job to run in the router... Thanks in advance, Assen Totin _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/