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I have Cisco ISR 1921 with input errors and over-runs. The original interface G0/0 was showing the overruns and input errors and the recommended Cisco fix was to update the IOS as this was a bug. The router was updated to running 156-1.T3.bin but I...
There are prerequisites that need to be enabled in order for BFD to work. Please make sure that Cisco Express forwarding and IP routing is enabled on the router. Then recheck "sh bfd nei detail" and see if that brings up the "state bit'.
It is not a Port Channel and it is only configured with 4 secondary IP addresses and primary IP address, speed and duplex set at auto. Not sure what the speed of the Firewall Interface will need to check and report back, thanks.
There is a direct link to the FW (Fortinet), the configuration at the link G0/0 is pretty basic with an IP and subnetmask, speed auto and duplex auto. There are several secondary IPs on that interface as well.
