This is a rather complicated setup. Is this network already operational?
Is this a LAN or a MAN? Leased lines or private links?
Are you certain that you will not run into some distance-limitations?
Spanning tree will work OK for you if this is a LAN. Just be careful that you choose the correct switch as root-switch. This is normally the one at the data-center. With spanning tree, one link will always be in standby mode.
A more optimal solution might be to implement L3 switching on these links, this allows you to use them all. This is preferrable if you are paying money for each link.
Regarding VLANs; if this is one single LAN, you may run a single VTP domain over it. If it is larger than one building, i.e. a campus-network or a MAN, you should consider splitting it up in separate VTP-domains, one for each entity that uses the network. The links connecting the sites should certainly not be set up as trunks in this case. Just IP routing.
[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...