I have two problems with a 2950 switch that I think might be related, just a hunch. The switch is connected to our core Cisco network over a dot1q trunk carrying some 20 VLANs. One of these VLANS is our admin network, VLAN 10, that the switch has a VLAN interface assigned to it.
Now, the troubling thing is that in our network I have a VTP domain set up that isn't propagated to the 2950 switch. As a test I disconnected the network cable connecting the 2950 to our core and to my surprize the VLAN 10 interface remained up. The switch logged that the physical interface went down but never the VLAN interface.
No VTP is annoying but the VLAN interface remaining up is just strange.
[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...