ICMP redirect packets ignored

Issue

• The router/default gateway sends out ICMP redirects to a RHEL box that seems to ignore them
  • No correct routing entries can be found in the router cache after redirects.
• The redirect is not subject to any of the reject conditions seen in the code
  • The new gateway is not the same as the default gateway
  • all.accept_redirects and eth0.accept_redirects are both 1
  • all.forwarding and eth0.forwarding are both 1
  • There are no error messages in the logs about rt_cache rebuilding
  • New gateway is on the local network
  • Shared media and secure redirects are off
  • The new gateway is a normal unicast IP
• Probing shows that the reject conditions are not misfiring