I need to see what VLAN-ids are present on a trunk interface. What debugs would help me achieve this?
Currently, i have an Cisco IE3000 switch, with an interface defined as a trunk. The other end is unknown to me, but I know it transmits tagged frames. I just don't know which VLAN-ids are in use - so I was thinking on doing some debugs to learn the VLAN-ids. Remote end does not transmit BPDUs
[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...