If I have a FEX up linked to two 5548's and configured with a vPC, since one 5548 technically 'owns' the FEX, can someone confirm from experience what happens when the owner 5548 fails? vPC peer links are configured between the 5548's. There seems to be some disagreements in the class I'm in around whether or not the FEX will go offline when only one of the upstream/parent 5548 fails.
[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...