Trunk options on HP Procurve

Rick_Penney
Rick_Penney used Ask the Experts™
on
Hi
I need to set up a trunk on two HP Procurve switches, not sure yet on model but I have been testing on a couple of 2920-24G J9727A

I have set up Trunk Trk1 across ports 1 and 2, and then tagged Trk1 for both my vlans, i have then repeated this on the second switch. As i havent set up trunks before, i did this via the GUI (switch firmware 16.09.0003)

Everything seems to be working ok, spanning tree is enabled and both ports are still active.

Am i done?, looking on the manual, there are two methods, Trunk group operation using LACP and Trunk group operation using the "trunk" option.

Current switches already have VLAN1 being used for data, vlan50 for voice and vlan3 for management.

If i need to change it to LACP, can the use of vlans stay the same or does vlan1 need to go?

show trunk  displays ports 1 and 2 in Trunk Trk1
show trunk trk1   returns  module not present for port or invalid port : trk1  
Not sure if that means something is wrong?

regards
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nociSoftware Engineer
Distinguished Expert 2018

Commented:
Did you try show port Trk1?
(i currently have no access to a switch to check).

Author

Commented:
Hi, thanks for your post.
It doesn't like the term port -   Ambiguous input: port

In the live environment I will have:
Switch A with 2 sfp ports  (Trk1) connected to switch B
Switch A with the other 2 sfp ports  (Trk2) connecting to Switch C

I just wondered if this will suffice using the Trunk group operation using Trunk, or if I need to change to Trunk group operation using LACP, and what the benefit would be.

regards
Rick
Software Engineer
Distinguished Expert 2018
Commented:
For the switch it is more or less equal...
Trunk Static trunk is just that. No Doubts or possible problems around configurations.
Trunk LACP is Dynamic, sounds easy, I have seen this fail & burn down a link due to drops  in LACP traffic.
If the link gets sustained into saturation also LACP gets dropped, causing reconfiguration, flapping as they don't loose connection at the same time followed by short lack of traffic followed by rebuild and then again failing..   In short i am not a fan of LACP in most cases.

Author

Commented:
Thank you noci, i'm very grateful for your help and detailed explanation.
Much appreciated
regards
Rick

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