[f-nsp] arp problem on brocade mlx

[Tudor Capatina]

Hello all,

on a brocade mlx-4 running IronWare : Version 5.4.0fT163, following a crash (was doing a no ip route under a ip vrf and the box rebooted itself), I am facing a weird problem.

On a 10G interface i have several customers, each connected in a vlan, with a vlan interface and a /30 used for the connection. All were working ok before the crash. Now on some of them i get the following behaviour: i receive a mac-address all the time, at times there is an arp entry, after some time it is gone, later it works again (sometime after a cpe reboot, sometime it just works).

It sounded to me like a cache or an arp limit problem but:

sh ip cache
Total IP and IPVPN Cache Entry Usage on LPs:
 Module        Host    Network       Free      Total
      1        3745     361450     159093     524288
      2        4132     361450     158706     524288
      3        4996     361450     157842     524288
      4        4884     361450     157954     524288


respectively:
#sh default values | i arp
ip arp age:10 min          bootp relay max hops:4     ip ttl:64 hops
ip-arp                   8192       65536      8192       8192       8192       No

while my arp usage is of 2k (as seen by show arp)

Any ideas what i could look at or what might cause this? Logs do not mention anything relevant.

Thanks a lot,
Tudor