I have 2 Cisco 4506 with Sup IV running HSRP. One being active, the other standby at all times.
After running for 2 months, Core switch 1 (Active) hangs yesterday at non-peak hour (8pm night) , unable to access even through console port
Worse, the connection of edge switches to Core switch 2 did not move from blocking to forwarding. We are running rstp. Finnally, we need to reset it to have access to the console port. Is this a hardware problem or a bug or what. Failover would have help me, unfounately it did not.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...