I have 6 interfaces in mt PIX515 firewall,E0 is connected to the Internet through router.
E1 interface is assigned as 10.16.10.1 with 255.255.0.0,connected to a switch,in the same trusted network there is a Domino mail server,whose address is 10.16.10.5 with 255.255.0.0.
The E1 interface is connected to the fastethernet interface of teh router e0/0 whose address is 10.16.10.31 with 255.255.0.0.
The serial interface (whose Ip address is 172.16.1.1 with 255.255.255.252)is connected to the remote site serial interface of a router (whose IP address is 172.16.1.2 with 255.255.255.252)over leased line.
Fast ethernet interface of the remote router is aatache to teh switch whose IP address is 10.81.10.1 with 255.255.0.0.There are some users in the 10.81.10.0 network.
Routing in PIX:
route (outside) 0.0.0.0 0.0.0.0 Internet net router serial interface.
route (outside) 10.81.0.0 255.255.0.0 via 10.16.10.31
Local router :
Ip route 10.81.0.0 255.255.0.0 via 172.16.1.2 255.255.255.252
Remote router :
IP route 10.16.0.0 255.255.0.0 via 172.16.1.1 255.255.255.252
Domino Mail serevr :
route is added to reach the 10.81.0.0 network.
The issue is we are able to PING the momino mail server from 10.81.0.0 network sometimes only,most of the time we are not able to ping teh domino server.Locally from router we are able to PING.
Router fastethernet port is attached to the 16 port of the switch,PIX firewall E1 interface is attched to the 17 th port of the Switch,Domino Mail server is connected to tehe 18th port.All these ports are the member of teh VLAN 5.
Please help me to resolve the issue.