Catalyst 3550-48 SWITCH,a computer connected to the f0/40,and vlan id is 301,as the begining,the computer can ping the default-gateway,but after some time (perhaps several days),the computer can't ping the default-gateway.let the computer connected to the f0/42,and the same vlan,can ping the gateway for a while,after some time,the problem is the same as above!
we make the vlans in 6006,and the 3550-48 is the client of the 6006's domain!the other computers have not the problem
I also encounter a similar problem here, I have yet need to find out the solution for my problem but I'd like to list it here as it may have something in common:
I used 1 x Cisco 3750 as LAN switch to route different network, each physical interface represent one Class C network and I use "no switchport" command to set up L3 routing between each segment. As far as the configuration concern, no problem with routing.
The problem is: occasionally, users report problem saying it cannot connect to the network. What I found is that the host can ping up to the local default gateway and any interfaces on Cisco 3750, but it cannot reach anything beyond 3750 (i.e. ping hosts on other network will fail) This problem occurs:
1. Randomly, so that it is not the switching problem.
2. Happens on all subnetworks, so that it looks like to be a 3750 problem
All I can do was:
1. Clear 3750 arp cache
2. Change the host's MAC address (from NIC utilities).
3. Wait a while and change MAC address back
then the host is OK again.
It looks like to be a MAC/ARP problem with the 3750 switch, but I cannot find out any related articles describing this problem. Has anyone met this sort of situation before?
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
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