I work for a small ISP and ran into loop problem few weeks ago and like to see how different other engineers would tackle the problem that I faced .I am a firewall engineer and does not have much knowledge on switching and routing.
Servers in client 2 created loops due to failed DHCP server effecting other customers netowrk. we quickly identified the problem and created a block list on client2's firewall.Wondering if there are any proactive steps that can be taken on the switch to avoid bad traffic and loops.Any insight on my question is much appreciated.
[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...