I have been troubleshooting a problem that happens every so often on some of my vlans. I have 2 6509's configured with multiple vlans using an msfc. I have been recieve input buffer drops. When investigating this problem with my sniffer, I notices that when the buffer fills up it's due to a large number of arp request sent from them router to every workstation on that segment. What would make the router all at once start senting arp requests? I have the ARP table (MSFC)set to 4 hours , the cam table(6509) set to 5 min and the mac table(3548) set to 5 min agingtime. Normal ARP request from a workstation to the router are replied with the gateways mac address, I want to know if this is normal also?
ARP requests are sent to every station until it finds a match, so any time the router gets a request for an IP not in the cache, it will flood out ARP packets until it gets a response. Also, if the gateway will respond with its mac address to any IP on another segment, and the router does the packet rewrites as it sends data on to the destination.
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.