From: ccie2be (ccie2be@nyc.rr.com)
Date: Thu Jun 03 2004 - 14:27:48 GMT-3
Hey Sam,
You're right about 1.
Regarding 2, there's not enough info to answer that question. As usual, it
depends on what the requirements are. In general, it's safer to hard code
what you want or need. So, if you want the etherchannel to always be a
trunk, use the command. You can also leave the ports at their default
setting and they will become an ISL trunk which is the default if it's
supported on both sides of the link.
I'm not positive what happens when you config 1 side with encap dot1q & you
leave it at the default setting of dynmaic desirable, but you can use the
show interface trunk to see what happens in that situation.
HTH
----- Original Message -----
From: <samccie2004@yahoo.co.uk>
To: "studygroup" <ccielab@groupstudy.com>
Sent: Thursday, June 03, 2004 1:11 PM
Subject: port-channel config
> Hi group
>
> Just checking in order not too loose points.
>
> Two switches must have etherchannel configured only SW1 can initiate
> negotiation thru LACP.
> 1-What I am nearly sure about is that SW1 should have ether mode as
active,
> and SW2 as passive.
> 2-what I am not sure about is whether switchport mode trunk is needed or
> not. Can I leave it as per default, ie dynamic desirable.
>
> Many thanks
>
> Sam
>
> interface Port-channel20
> switchport trunk encapsulation dot1q
> switchport mode trunk
> !
> interface FastEthernet0/17
> switchport trunk encapsulation dot1q
> switchport mode trunk
> channel-group 20 mode active
> !
> interface FastEthernet0/18
> switchport trunk encapsulation dot1q
> switchport mode trunk
> channel-group 20 mode active
>
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