Force 10 mac routing issue
===

We have a force10 s55 router that is doing something funny with only a few hosts that are plugged into this one port. There are two hosts that are plugged into a Cisco switch that uplinks to port 0/18 on our s55. One servers flies the other is slow.. (we are testing with mysqlslap server1 0.0xx sec, server 2 3.xx sec)

I found this:

    corerouter# show arp ip 10.21.31.231
    
    protocol    Address         Age(min)  Hardware Address    Interface  VLAN             CPU
    ----------------------------------------------------------------------------------------
    Internet    10.21.31.231        240   00:25:90:91:2e:38   Gi 0/18    Vl 1021          CP

    corerouter# show arp ip 10.21.31.232
    
    Protocol    Address         Age(min)  Hardware Address    Interface  VLAN             CPU
    -----------------------------------------------------------------------------------------
    Internet    10.21.31.232          0   00:25:90:91:2e:c6   Gi 0/18    Vl 1021          CP
    
    corerouter# show ip cam stack-unit 0 port-set 0 | grep 31.23 
    10.21.31.231        0  0 1 0  1021 00:25:90:91:2e:38   0012 Gi 0/18

as you can see 10.21.31.232 is missing!! 

    corerouter# show ip fib stack-unit 0
    
    Destination          Gateway              First-Hop           Mac-Addr        Port    VId 
    ---------------  ------------------------- ----------------- ------------------- -------- ---
    10.21.31.231/32 via 10.21.31.231, Vl 1021   10.21.31.231      00:25:90:91:2e:38  Gi 0/18   1021  0
    10.21.31.232/32 via 10.21.31.232, Vl 1021   10.21.31.232      00:25:90:91:2e:c6   UNWRTN   1021  0

on this list 232 is showing UNWRTN as the port number? 

I tried no arp 10.21.31.232 and clear ip fib stack-unit 0 but that does not clear the table it just clears the ip to mac translation. How do I re-read the fib?