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Cisco Bug: CSCsy78204 - AGM: Nexthop may be unresolved after some networking reconfiguration

Last Modified

Sep 18, 2016

Products (1)

  • Cisco Guard DDoS Mitigation Appliances

Known Affected Releases


Description (partial)

Traffic is not forwarded from AGM to nexthop
The following messages appears in consoles once per 24 hours starting from first discovery of the problem:
Message from syslogd@__hostname__ at __date__...
__hostname__ cm: Guard, 0 diversion-failed: Nexthop doesn't answer ARP (__nexthop_ip__

It is possible that the nexthop is still pingable from CLI console! It doesn't nessecarily prove that divertor can resolve the nexthop as well.

Scenario 1. 
Injection vlan ips and the nexthop IP were changed.

Scenario 2. 
3 vlan interfaces of injection vlan were reconfigured to the different of even to same ips again.
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