[j-nsp] 3750 and 4200

[Eric Krichbaum]

On the cisco, mode on sets etherchannel not LACP (802.3ad).  All static port
channels, that is, that are not running LACP, remain in this mode. If you
attempt to change the channel mode to active or passive before enabling
LACP, the device returns an error message.
You enable LACP on each channel by configuring the interface in that channel
for the channel mode as either active or passive. When an LACP attempts to
negotiate with an interface in the on state, it does not receive any LACP
packets and becomes an individual link with that interface; it does not join
the LACP channel group.

Eric

-----Original Message-----
From: Jonathan Lassoff [mailto:jof at thejof.com] 
Sent: Wednesday, March 13, 2013 9:16 PM
To: Eric Krichbaum
Cc: snort bsd; juniper-nsp
Subject: Re: [j-nsp] 3750 and 4200

On Wed, Mar 13, 2013 at 6:36 PM, Eric Krichbaum <eric at telic.us> wrote:
> More likely, it's the forced "on" mode which disables LACP.  Try it 
> with mode active.

Will JunOS show the ae as down, then?

[channel-group N mode on] with IOS just enables portchanneling
unconditionally.
Wouldn't that, in conjunction with a JunOS without an "lacp" stanza under
the ifd / interface stanza (lacp passive) work just fine? I've mostly only
been doing JunOS-JunOS LACP lately, though I've done it quite a bit with
Cisco-Cisco in the past.

LACP is worth running on your links if it works, IMO.

Maybe try setting active on the JunOS and Cisco sides?

!
interface Fa1/0/9
 channel-group 10 mode active
!

set interface ae1 aggregated-ether-options lacp active