We have two WAN layer 2 ccts in our datacentres,one cct is 10gig and other is 5gig.We are planning to installed both cct into pair of Cisco 6500-VSS switches in each datacentre and bundle together as etherchannel to utilise both links, but I am not sure that we will achieve 15gig total bandwidth.My views are that , we might only get 5gig each, 10gig in toatal,then its mean we should leave etherchannel and use links in active/passive.
OK, that will work then. You can set the load balance to a couple of different modes.
With a PFC2: –src-port—Source Layer 4 port –dst-port—Destination Layer 4 port –src-dst-port—Source and destination Layer 4 port
•With a PFC or PFC2: –src-ip—Source IP addresses
–dst-ip—Destination IP addresses
–src-dst-ip—Source and destination IP addresses
–src-mac—Source MAC addresses
–dst-mac—Destination MAC addresses
–src-dst-mac—Source and destination MAC addresses
Depending on your traffic flows and the amount of traffic, you could possibly get the bundle to load balance effectively, assuming the amount of traffic rarely if ever hits 5GB. It's safe to assume that if you will get that much traffic, not to use etherchannel. Again P2P links or STP will probably be better, but you know your network best.
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