I have a problem between my 1750 router with Fasteth interface, and a 16 port Hub (3 Com) I set the speed to 10MB and half duplex.
The PC's connected to the switch can ping the router fasteth interface. When the entry in the arp table times out, the PC's cannot ping the router anymore. From the router you cannot ping the PC anymore either. When I clear the arp cache on the router, I can ping again. The default arp timer is set to 4 minutes.
What I would suggest is isloating the problem one by one. First connect one PC directly to the fast-ethernet interface of the router using a cross cable and see whether the problem repeats. If its not working fine, ensure that the speed and duplex is made auto, no access-list is configured on the router's interface.
Apply the latest patch/service pack for the OS running in the PC.
If the problem still continues, try upgrading the IOS of the router.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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