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AlgebraicMirror
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Aug 14, 2017
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What's the difference between a "Trunk" and a LACP trunk?

I've noticed in the F5 interface that you can set up trunks on the F5 system in order to aggregate interfaces together. I know you can set up an LACP trunk, but the interface appears to let you set up a trunk without checking the "LACP" checkbox. If it's not doing LACP, what kind of protocol is the trunk using? What is the difference between that and a LACP trunk?

 

  • Without LACP selected, you will statically force link aggregation without a negotiating protocol. If on the other end you have a Cisco switch, this would be compatible with Etherchannel 'channel-group 1 mode on' configuration.

     

    The only situation where static link aggregation makes technical sense is if on the other end you have a device which does not support LACP. Static aggregation is more susceptible to spanning-tree interference and switching loops

     

4 Replies

  • Without LACP selected, you will statically force link aggregation without a negotiating protocol. If on the other end you have a Cisco switch, this would be compatible with Etherchannel 'channel-group 1 mode on' configuration.

     

    The only situation where static link aggregation makes technical sense is if on the other end you have a device which does not support LACP. Static aggregation is more susceptible to spanning-tree interference and switching loops

     

  • Without LACP selected, you will statically force link aggregation without a negotiating protocol. If on the other end you have a Cisco switch, this would be compatible with Etherchannel 'channel-group 1 mode on' configuration.

     

    The only situation where static link aggregation makes technical sense is if on the other end you have a device which does not support LACP. Static aggregation is more susceptible to spanning-tree interference and switching loops