Dropped Connections

G

ghyde

CCNA, CCDA
I've been having this persistant problem with my cable modem connection dropping intermittently. It usually comes back up on its own in about a minute, or within seconds if I disconnect/reconnect the ethernet cable.

Anyone else having this problem??
 
i have a problem sort of like that at my brothers house. i think its some sort of incompatibility between the cable service and his NAT router, because the connection is good, its just that DNS will fail. it only happens once every couple of days, and it only lasts about 10 minutes. i don t know how to fix it, but to see if your problem is the same as mine, you should check next time it happens. try to ping a valid IP address next time you lose your connection. if you can ping an IP address, but not a FQDN, then you might have the same problem i am seeing.

i am using a netgear RT304 router with Cablevisions Optimum online cable service.
 
I've been monitoring my connection via the console log and have been getting an -Awful Lot- of the following messages:

localhost lookupd[225]: DNSAgent: dns_send_query_server - send failed for 204.127.202.4

Mail[331] IMAPConnection failed to connect to server mail.mac.com on port 143 because: Can\\u2019t determine IP address of host: mail.mac.com.

From the above, tt seems the NAT suspecion is accurate.
 
My dad's powerbook has a problem with losing the connection. Whenever he puts it to sleep or closes it and takes it somewhere then hooks it back up to the cable modem the DHCP doesn't respond immediately. It will just sit there. I've had to play with it every time to get the dhcp server to notice the computer or the computer to grab a new IP. (not sure which is the case)
 
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