Re: I have got a fact about routing enabled on C3550.
The 3550 is a router when it has the correct image (EMI) and ip routing has been enabled with "ip routing". It routes between vlans as described above using virtual interfaces like; INT VLAN1, INT VLAN2 which each have IP addresses. Ports assigned to vlans 1 and 2 are routed through the virtual interfaces and do not have ip addresses on the phyisical interfaces.
In addition individual ports can be "pulled out of the switch" and made into traditional router ports using the interface command "no switchport access". These ports are not in any vlan and can then have ip addresses assigned to the physical interface.
[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...