I have 2 6500 at the core. They are connected to each other using 2 gig ports bundled together. Is this configuration right? do i need to do anything else to make sure that the trunks are stable and do not cause any spanning tree issues.
The configuration is technically correct, although we recommend using channel group desirable as well as trunk desirable. This enables the use of the underlying negotiation protocols and functions as an integrity check to ensure that the partner ports are transmitting and receiving properly. This is detailed in the best practices document:
your best bet is to first configure the port channel, and then configure all other characteristics under the interface port-channel1 interface. The physical interfaces that are members of the channel will inherit the configuration from the port-channel interface. This way you can avoid having a config mismatch that will cause the channel to be suspended (as well as a lot of frustration).
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