I have a Cisco ASA 5510 as firewall which is directly connected to a Cisco 2600 series router (this is supplied by ISP) .
ASA's outside is connected to router's interface by a patch cable.
Every thing seems to run properly but I experienced too many errors on outside.
For example, within 48 hours period, I can get this situation:
34.631 late collisions
ISP told me his interface has been set to 10 Mb full duplex, but if I set up outside to auto auto I can get 10 Mb half-duplex
Please, anyone of you could give me an help?