We have a major problem on our network. Seems broadcast storms are increasing in frequency and intensity. Basically, here's the topo of the LAN. Dual 6509's with MSFC's. Into them dual connected are a 4003, 4006, and a dozen or so 3548's. Connected into the 4003 are a few WAN routers that head out of the network to remote sites.
The problem is I can look at MRTG and see the broadcast storms on every port on the switches. The 6509's have HSRP running, and during the storms, they who "duplicate address <MSFC IP> on Vlan1, sourced by (his own Mac address).
The 4006 is showing a %SYS-4-P2_WARN: 1/Host xx.xx.xx.xx.xx.xx is flapping between port <a FastE port> and <GigE uplink to 6509P>
Well back to the broadcast storm. Best I can spot with tcpdump is tons of arp who-has from random hosts on the network. During this storm I'll see ~250 packets in a single second from a host arping for either another device or his gateway. No patterns between ports, devices or anything. It goes on for dozens of devices, but not all, and the just stops with no intervention.
I'm at a loss... Any ideas of what direction to troubleshoot this?
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...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.