IN MY NETWORK WHICH WAS WORKING FOR A LONG TIME HAS SUDDENLY A PROBLEM WHICH IS THE FAST ETHERNET PORT GOES DOWN AND AFTER A WHILE IT GOES UP AND SO ON, I DECIDED TO CHANGE THE ROUTER, THE SAME THING HAPPEN IN MY NETWORK, COULD YOU HELP?
Your router (assuming the FE is on a router) is probably not receiving the keepalives that are sent every 10s. This is likely due to a network or cabling problem and not a problem with the router itself.
Check what happens when you connect the fe to another switchport. It should stay up.
[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...