The Catalyst 4000 supports L3 switching externally, that is you need another L3 switch (e.g. 6000) to point it to.
The 4000 has a "L3 Module," but this is for InterVLAN routing, not L3 switching and they are not the same. Essentially, the module for the 4000 is a router on a blade with 32 10/100 ports. The two gigabit ports on this blade are router ports, not trunk ports, btw.
[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...