From: James Matrisciano (jmatrisciano@kenttech.com)
Date: Wed Apr 20 2005 - 16:33:12 GMT-3
Entering in the following commands
interface FastEthernet0/13
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
!
interface FastEthernet0/14
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
Be sure you know how you are setting up your channel-group
channel-group 1 mode ?
active Enable LACP unconditionally
auto Enable PAgP only if a PAgP device is detected
desirable Enable PAgP unconditionally
on Enable Etherchannel only
passive Enable LACP only if a LACP device is detected
After entering in that command, the 3550 will prompt you with the
following:
Switch(config-if-range)#channel-g 1 mode on
Creating a port-channel interface Port-channel 1
If you now do a show run you will see the first interface that shows up
is:
!
interface Port-channel1
switchport trunk encapsulation dot1q
switchport mode trunk
!
The port channel will inherit the config you put on the actual port and
vice versa....if you create the interface port-channel1 first, then add
the port interface into the channel-group from the default setting, it
will pull its config from the port channel.
You can also set up port channels for L3 operation as well.
jm
jm
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Dennis J. Hartmann
Sent: Wednesday, April 20, 2005 2:13 PM
To: ccielab@groupstudy.com
Subject: NMC#2
I'm having a hard time seeing the Cat1 to Cat2 connection in the NMC
scenario's diagram. Is this indicative of the CCIE lab in general (that
there may be a lab diagram with some connectivity that's not shown in
the
diagram)?
Also: In the NMC#2 scenario, there's a port-channel interface that
maps
to the channel-group instances on Fa 0/13 and 0/14. In this scenario,
both
the physical interfaces and the L2 port-channel interface has the
following
commands:
sw tr enc dot1q
sw tr allowed vlan 10,20,30,40,50
sw mode trunk
I would check it myself, but I don't have connectivity to equipment
today. My question is as follows:
Is this port-channel to physical interface configuration mapping
done
dynamically by the switch or must it be manually configured?
Thanks.
Sincerely,
Dennis J. Hartmann
White Pine Communications
CCSI#23402/CCIP/CCNP/CCDP/CCNA/CCDA
Cisco IP Voice Support & Design Specialist
Cisco Optical, VPN & IDS Specialist
MCSE
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