You seem to encounter bug CSCdm46683. Known to be first found in 12.0(3.6) and seems to be solved with 12.0(6.4). Anyway if you'll try to change the software, the next maintenance build (for ex. 12.0(7) or later) is a better choice than an interim build like 12.0(6.4). Of course you should check the software advisories also.
[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...