Look into using MHSRP on the 7206s (one 7206 active from group 1 and the other 7206 active for group 2) so that traffic can be split going to the 7206s from the 5505s. This assumes that the 5505 that connects to the 7206 will be STP root for the vlan that is HSRP active for that 7206, for optimal traffic flow. Then load balancing via CEF isn't required and there are fewer hops for the traffic to take. Eg traffic on 5505-a hits the 7206a, who then forwards it to 7609-a - or 5505b then 7206b then 7609b. Really it depends on your layer 2/STP design to know if it optimizes traffic flow (worst case traffic crosses both switches, but not both routers). Without MHSRP the traffic flow for every other packet or destination, depending on how cef is set up to load balance, is 5505 (possibly both switches are used as it crosses the link between switches), 7206, then the other 7206 and then 7609. More hops to cross.
If the above option doesn't appeal to you - Use the maximum-paths command under OSPF to allow more than one path to the routing table. OSPF allows only equal cost load balancing. Therefore you will have to play with metrics to get the 7206s to load balance.
[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...