If i config root guard on root switch , if network is large , any downside switch can cause root switch interface change to block status. this will affect customer important traffic pass through the root switch.
if i confi root guard feature on access switch, there are many many access switches, config task is huge
if i config two mst instance , one root on 6509-1 the other instance root on 6509-2 how can i config root guard on two switch. can root guard distinguish between different vlan bpdu priority?
You should enable RootGuard where there is a danger of new switch [with better credentials] to show up. That would be the access switches. Once your network topology is stabilized, any additions to it is where the danger could be.
[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...