I understand that at the switch level "cgmp enable" will keep multicasts from flooding all ports on the switch and keep performance humming. But I see that at the interface level in at the MSFC you have the option of adding "ip cgmp" on that interface. What would be the purpose of that? Thanks.
It is there to act as a CGMP server for "other" CGMP capable switches. For example, if you have an XL switch that only supports CGMP, the MSFC will be the CGMP server to help the XL switch build its mcast forwarding table.
[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...