RE: question on Channel-protocol configuration

From: subodh.rawat@wipro.com
Date: Wed Sep 26 2007 - 07:04:14 ART


This is something promising. Absolutely, "CCIE Lab only" command ...LOL

________________________________

From: Mounir Mohamed [mailto:mounir.mohamed@gmail.com]
Sent: Wednesday, September 26, 2007 3:05 PM
To: Subodh Singh Rawat (WT01 - TELECOM SERVICE PROVIDER)
Cc: shinepjoseph@iprimus.com.au; ccielab@groupstudy.com
Subject: Re: question on Channel-protocol configuration

One more hint, the channel-protocol command only need to restrict the
protocol that can be used on the interface.

On 9/26/07, Mounir Mohamed <mounir.mohamed@gmail.com> wrote:

        Yes, by configured the mode the switch will undestand which
protocol you enabled on so no need to specify the channel-protocol on.

        interface FastEthernet0/13
         switchport trunk encapsulation dot1q
         switchport mode trunk
         channel-group 1 mode desirable
        end

        Rack1SW1#show run int f0/14
        Building configuration...

        Current configuration : 127 bytes
        !
        interface FastEthernet0/14
         switchport trunk encapsulation dot1q
         switchport mode trunk
         channel-group 1 mode desirable
        end

        Rack1SW1#show run int f0/15
        Building configuration...

        Current configuration : 127 bytes
        !
        interface FastEthernet0/15
         switchport trunk encapsulation dot1q
         switchport mode trunk
         channel-group 1 mode desirable
        end

        Rack1SW1#show ether pro
                        Channel-group listing:
                        ----------------------

        Group: 1
        ----------
        Protocol: PAgP

        On 9/26/07, subodh.rawat@wipro.com < subodh.rawat@wipro.com
<mailto:subodh.rawat@wipro.com> > wrote:

                So, is it really required to give "channel-protocol
pagp" when we are
                giving "channel-group 1 mode desirable" at both the
ends? Because,
                desirable-desirable will in any case result in PAGP.

                Subodh

                -----Original Message-----
                From: Shine Joseph [mailto: shinepjoseph@iprimus.com.au
<mailto:shinepjoseph@iprimus.com.au> ]
                Sent: Wednesday, September 26, 2007 1:27 PM
                To: Subodh Singh Rawat (WT01 - TELECOM SERVICE
PROVIDER);
                ccielab@groupstudy.com
                Subject: RE: question on Channel-protocol configuration

                Subodh,

                The first one is a valid configuration.

                The second configuration is not valid and the switch
would reject the
                command when you try to configure. Please see below the
error message.

                SW2(config-if)#channel-protocol pagp
                SW2(config-if)#
                02:09:08: %EC-5-ERRPROT2: Command rejected: the
interface Fa0/14 is
                already part of a channel with a different type of
protocol enabled

                HTH,
                Shine

                -----Original Message-----
                From: nobody@groupstudy.com [mailto:
nobody@groupstudy.com <mailto:nobody@groupstudy.com> ] On Behalf Of
                subodh.rawat@wipro.com
                Sent: Wednesday, 26 September 2007 2:32 PM
                To: ccielab@groupstudy.com
                Subject: question on Channel-protocol configuration

                Hi Group,

                Please let me know what is the result of below
configurations:

                interface FastEthernet0/20
                no switchport
                no ip address
                channel-protocol pagp
                channel-group 1 mode desirable

                AND

                interface FastEthernet0/20
                no switchport
                no ip address
                channel-protocol pagp
                channel-group 1 mode active

                Assuming other end in the configuration is
"channel-group 1 mode
                desirable" and "channel-group 1 mode passive"
respectively.

                Subodh

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