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тАО11-12-2007 10:39 PM
тАО11-12-2007 10:39 PM
LACP between Cisco and Procurve
I have a wireless p2p brige with 25Mbps capacity between 2 buildings.
In one building there is a Procurve2626 switch, in the other there is a Cisco 3550.
The wireless bridge is transparent L2.
Now I want to expand using another wireless bridge to get more capacity.
I have another brige lying we don`t use anymore witch is the same type as we are cyrrently use.
I used this config on the Cisco:
Cat-3550# configure terminal
Cat-3550 (config)# interface gigabitEthernet 0/1
Cat-3550 (config-if)# no ip address
Cat-3550 (config-if)# channel-protocol lacp
Cat-3550 (config-if)# channel-group 1 mode active
Cat-3550 (config-if)# exit
Cat-3550 (config)# interface gigabitEthernet 0/2
Cat-3550 (config-if)# no ip address
Cat-3550 (config-if)# channel-protocol lacp
Cat-3550 (config-if)# channel-group 1 mode active
Cat-3550 (config-if)# exit
Cat-3550 (config)# exit
And this on the Procurve
runk 12,13 trk1 lacp
But I just get storming.
How shuld I do this config?
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тАО11-12-2007 11:46 PM
тАО11-12-2007 11:46 PM
Re: LACP between Cisco and Procurve
I wouldn't expect LACP to pass through a bridge. I haven't looked it up, but all those link-local communications protocols are usually special multicast destinations assigned from an IEEE range that shall not be forwarded, like BPDUs and PAUSEs. I would expect the bridge (wireless or not) to sink them locally.
The odd thing, though, is that you would not get an LACP link up without LACP in the first place, so no way for it to storm. Are you sure the bridges are not actually speaking LACP themselves?
I would rule out an "airgap" shortcut, but only because I haven't seen what the ports actually see as LACP neighbors. Maybe they even see themselves or their same-switch siblings...
IMO the only sane way to do this would be routing, but it rules out the ProCurves. Even those that can route somewhat decently cannot load balance in a more than pathetic way, and they haven't got routed interfaces either. Maybe you can place another 3550/60 at the other side ;)
Andre.
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тАО11-13-2007 12:24 AM
тАО11-13-2007 12:24 AM
Re: LACP between Cisco and Procurve
Actualy I was not testing the LACP through the wireless bridges, I just tested it with patch cables in my office.
What could be wrong?
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тАО11-13-2007 03:49 AM
тАО11-13-2007 03:49 AM
Re: LACP between Cisco and Procurve
> Actualy I was not testing the LACP through
> the wireless bridges, I just tested it with
> patch cables in my office.
Ah yep. Should work then, though I haven't actually tried to connect Cisco and HP using LACP aggregates so far.
> What could be wrong?
VLAN tagging in combination with PVST+ versus SSTP issues could probably wreak enough havoc to get you into stormy network weather. It's still strange, though - LACP should take care of links that are not configured correctly on both sides. ProCurve switches often have passive LACP enabled and happily build aggregates with whoever requests them, but the feature is mostly useless because the properties of the trunk (especially its VLAN membership) cannot be controlled (drops back to the default VLAN).
Is the storm really coming up as a loop between the two LACP controlled links? Or are their other paths in your test setup?
Andre.
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тАО11-13-2007 08:51 PM
тАО11-13-2007 08:51 PM
Re: LACP between Cisco and Procurve
You may need to enable UDLD.
But I'm not sure ProCurve 2626 and Cisco 3550 support it.
Good luck,
Dmitry
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тАО11-13-2007 09:07 PM
тАО11-13-2007 09:07 PM
Re: LACP between Cisco and Procurve
Good luck,
Dmitry
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тАО11-14-2007 04:56 AM
тАО11-14-2007 04:56 AM
Re: LACP between Cisco and Procurve
How do I setup this on the 2626 and the 3550?
Haven`t tryed it before.