IP communication trouble

[ramathiam]

Hello all,

First timer here.

I have recently setup a small ethernet static IP network. I have my router setup with a serial connection to my provider and an ethernet connection to my local network. From my PC's, I can ping the router interface successfully everytime. If I try to ping another PC, I get 1 response then 3 failed responses. I can try to ping the same PC immediately afterward and then I get 4 failed responses. I can clear the ARP cache and it starts over with 1 successful and 3 failed. I get the same results if I try to ping any PC from the router, 1 successful and 4 failed. I can browse the Internet smoothly from each PC, so two-way traffic is working.

Any ideas as to what would cause this? It acts like routing, but I'm working with static routes so there's not much there to go wrong.


Thanks!

[classicsoftware]

How do you connect to your ISP via serial?
What router has a serial connection?
Did you disable DHCP in the router?

[Variable]

Something is blocking ICMP traffic. Probably the router is doing some type of Ping flood detection. It is doubtfull that all PC's would have the software blocking ping, you could test this by directly connecting to PC's with a crossover cable. It is likely a setting in the router, normall a software applicaiton blocking ping would simply not allow any pings. You mentioned you could ping once then nothing... Browsing the internet and networking between PC's is two different things, the two are not completely related. Although, it does show that they all use tcp/ip. You didn't mention any problems networking the PC's other than a ping issue. That in and of itself will neither stop networking of PC's nor will fixing that issue allow networking beween PC's. Ping is a diagnostic tool not a networking necessity. I would look at the router first. Is it an old Cisco?