I have a router connected to a 3550 switch. The router is in vlan 55. I want to limit communication on vlan 55 to the mac addresses of the routers E0 int (0000.0c0a.38c4) and the mac address of the switch (000d.29ce.0180).
When I attempt to ping from the switch to the router interface I get timed out.
If I remove the vlan filter pings are good.
I have monitored the switch port connected to vlan 55 and can see my ARP request getting a response. I can also see the echo request and reply packets. However the vlan filter still appears to be blocking the ICMP response packet.
[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...