The fact that the source mac address is that of my core switch leads me to believe the broadcast is being propgated from somewhere else, a directed-broadcast by chacne?
Ok, just for troubleshooting purposes, I remove these VLANs from the trunks to one of my switches with the high CPU... as expected CPU drops back to normal.
I add VLAN 110 back on, DHCPD process jumps up to 8%, add vlan 141 back on, DHCPD process jumps to 12-16%...
Ok, so it would seem that these three VLANs are getting beaten up. I enable storm-control on all my access-ports at a fairly low amount, on the 4500s, i used a threshold of 0.2%. Storm-control kicked in on my uplink ports to my core, but nowhere else.
The server that has the IP of 192.168.102.176 (Vlan 102), doesn't seem to be doing anything, i actually turn it off. Packets STILL flowing...
I verified that directed-broadcast was disabled on the VLAN interfaces, which it is.
At this point I assume SOMTHING is spoofing packets somewhere and it needs to stop. I jump on my core switches (the 4500s are my access-layer), which is a pair of Nexus 5548 switches, to do a bunch of captures. I capture off every interface with the rx option set, idea being I'll find the interface where these packets are being received and that'll let me narrow it down. Yeah, not so much. I dont see them coming from ANY ports on my Nexus cores, not the uplinks to my access-layer switches, not from the port-channels to my ESX hosts, not on regular server access ports.
I dont know where to look from here. I have 4x Cat 4506s running at nearly max CPU and I dont hvae a solution to stop it. ANyone have any ideas?? Thanks.
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...