From: Colin Barber (Colin.Barber@telewest.co.uk)
Date: Wed Mar 26 2003 - 06:21:28 GMT-3
It's recommended to use desirable. Spanning tree travels down the primary
link and if that's lost the channel will go down. Using PAgP will
re-negotiate the link. I cannot find the reference as the moment, maybe in
the LAN switching Cisco Press book.
Colin
-----Original Message-----
From: Mike Williams [mailto:ccie2be@swbell.net]
Sent: 25 March 2003 22:37
To: 'Gary Lileikis'
Cc: 'Ccielab@Groupstudy.Com'
Subject: RE: How to configure a ethernet channel as trunk on3550?
Gary,
Not to be nitpicky, but why use 'desirable' instead of 'on' when doing
the channel-group?
I know that Cisco loves options, and they love to make things 'detect'
other things, but I've always been a big fan of making things concrete
when possible, so I would use the 'channel-group 1 mode on'. I mean,
let's face it, either you want an etherchannel or you don't. I treat
trunks the same way (as you did in your sample config) where I force
both ends as far as encapsulation and mode. (I also for EVERY
switchport that's NOT a trunk by using 'switchport mode access'.....
Drives my co-workers crazy)
Just curious.
Mike W.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Gary Lileikis
Sent: Tuesday, March 25, 2003 2:13 PM
To: 'Fan Shan'
Cc: Ccielab@Groupstudy.Com
Subject: RE: How to configure a ethernet channel as trunk on3550?
Fan,
This should work:
interface Port-channel1
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
interface FastEthernet0/22
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
channel-group 1 mode desirable
!
interface FastEthernet0/23
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
channel-group 1 mode desirable
Regards,
Gary Lileikis
-----Original Message-----
From: Fan Shan [mailto:shanf@public.jn.sd.cn]
Sent: Tuesday, March 25, 2003 11:36 AM
To: Ccielab@Groupstudy.Com
Subject: How to configure a ethernet channel as trunk on3550?
How to configure a two-port etherchannel ,and make it a trunk? pls in
detail, thx
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