Before, it was responding instantly and the pings took less than 1 ms.
The sympthon is that the first ping to any IP address in the network takes a long time, afterwards it takes less than 10 ms...
Even worse, if there wasn't a previous attempt to communicate with an specific address, you may lose the first or second ping.
It seems to be related to an ARP issue, I've found the 5224 to be very "touchy" when interconnecting with other switches. Since there's no SNMP variable in the switch to measure CPU utilization, there's no way to prove my theory: The switch becomes overburden with address tables and freezes over. The ARP time limit or static ARPs don't seem to help.
An interim solution is to program a batch file to do a round of pings to each IP address in the network and keep ARP tables alive.
Dell technical support was really bad, they assured me these switches were not designed to connect servers or be connected to other switches ¿?, since they are "access switches", and they suggested I change them for "Core Swicthes" ($$).
That's what I'm going to do, but they won't be Dell.
dzenizo
6 Posts
0
February 24th, 2005 15:00
I have the same issue.
Before, it was responding instantly and the pings took less than 1 ms.
The sympthon is that the first ping to any IP address in the network takes a long time, afterwards it takes less than 10 ms...
Even worse, if there wasn't a previous attempt to communicate with an specific address, you may lose the first or second ping.
It seems to be related to an ARP issue, I've found the 5224 to be very "touchy" when interconnecting with other switches. Since there's no SNMP variable in the switch to measure CPU utilization, there's no way to prove my theory: The switch becomes overburden with address tables and freezes over. The ARP time limit or static ARPs don't seem to help.
An interim solution is to program a batch file to do a round of pings to each IP address in the network and keep ARP tables alive.
Dell technical support was really bad, they assured me these switches were not designed to connect servers or be connected to other switches ¿?, since they are "access switches", and they suggested I change them for "Core Swicthes" ($$).
That's what I'm going to do, but they won't be Dell.