weird packetloss on 1100Hx2 after upgrading to 6.X

Hi,

I am using two 1100Hx2 in hot standby config mostly as a ipsec vpn concentrators for our remote offices. After upgrading from 5.22 to 6.5 I started having weird packetloss for all default gw traffic (including inbound). It is only about 7% but it is consistent across any destination - even the closest gw router. In parallel to these mikrotiks we have two brocade loadbalancers that are using the same gateway/path and have no packetloss whatsoever. Also this doesn’t occur between the mikrotiks and local internal network. Can’t think of any other explanation other then it is the 6.X upgrade causing that. The routers have 0% cpu-load.

Attached is exported config of one of the routers. Please let me know if you want me to supply any more details. Any hints greatly appreciated.

Thanks,
Antony.
rt1.rsc (4.65 KB)

Welcome to the club. We didnt have the time to follow it through with MT support so just replaced them with CCR’s