Make sure that you have all the requirements to connect to ISDN BRI, for your router 2621 you may purchase network module (NM-4B-U) for four-port ISDN BRI or NM-8B-U for 8-port module. Don't forget to assign switch-type for your connection, ask your provider to get correct switch-type, without this correct switch-type you may experience wierd error command. Also make sure you assign correct SPIDs, again get this number from your provider. Hope can help..
[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...