From: slevin kremera (slevin.kremera@gmail.com)
Date: Mon Aug 13 2007 - 21:42:40 ART
thks guys...i understood the trick behind configuring etherchannel
On 8/13/07, Ben <ccieben@cox.net> wrote:
>
> Hi Slevin,
>
> With default settings, if you had two links between switches - one of
> them would be blocked on one side. If you bond the links using
> etherchannel, they are treated as one logical link - hence both are
> forwarding.
>
> Using NM-16ESW - SW1 & SW2 connected:
> Fa2/1 <-->Fa2/1
> Fa2/2 <-->Fa2/2
>
> Before Etherchannel:
> Rack1SW2#show spanning-tree vlan 10 brief | be Inter
> Interface Designated
> Name Port ID Prio Cost Sts Cost Bridge ID
> Port ID
> -------------------- ------- ---- ----- --- ----- --------------------
> -------
> FastEthernet2/1 128.82 128 19 FWD 0 32768 cc06.0c3c.0002
> 128.82
> FastEthernet2/2 128.83 128 19 BLK 0 32768 cc06.0c3c.0002
> 128.83
>
> After Etherchannel
> Rack1SW2#show spanning-tree vlan 10 brief | be Inter
> Interface Designated
> Name Port ID Prio Cost Sts Cost Bridge ID
> Port ID
> -------------------- ------- ---- ----- --- ----- --------------------
> -------
> Port-channel1 129.65 128 12 FWD 0 32768 cc06.0c3c.0002
> 129.65
>
> HTH
> Ben
> slevin kremera wrote:
> > what relation or effect does etherchannel configuration have in relation
> to
> > spanning tree forwarding state
> >
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