Information Technology Reference
In-Depth Information
----- ---------- --------- ----------- ------------------------- ----------
2/1 connected desirable channel WS-C5505 066509957(Sw 2/1
2/2 connected desirable channel WS-C5505 066509957(Sw 2/2
----- ---------- --------- ----------- ------------------------- ----------
Notice that the channel formed only between ports 2/1 and 2/2. Ports 2/3 and 2/4 were left out because
port 2/4 was in a different VLAN. There was no error message; PAgP just did what it could to make the
channel work. You need to watch the results when you create the channel to make sure that it did what
you wanted it to do.
Now let's set the channel manually to on with port 2/4 in a different VLAN and see what happens. First,
we will set the channel mode back to auto to tear down the existing channel, and then we will set the
channel manually to on.
Switch-A (enable)
set port channel 2/1-4 auto
Port(s) 2/1-4 channel mode set to auto.
Switch-A (enable)
1999 Dec 19 00:26:08 %PAGP-5-PORTFROMSTP:Port 2/1 left bridge port 2/1-2
1999 Dec 19 00:26:08 %PAGP-5-PORTFROMSTP:Port 2/2 left bridge port 2/1-2
1999 Dec 19 00:26:08 %PAGP-5-PORTFROMSTP:Port 2/3 left bridge port 2/3
1999 Dec 19 00:26:08 %PAGP-5-PORTFROMSTP:Port 2/4 left bridge port 2/4
1999 Dec 19 00:26:18 %PAGP-5-PORTTOSTP:Port 2/1 joined bridge port 2/1
1999 Dec 19 00:26:19 %PAGP-5-PORTTOSTP:Port 2/2 joined bridge port 2/2
1999 Dec 19 00:26:19 %PAGP-5-PORTTOSTP:Port 2/3 joined bridge port 2/3
1999 Dec 19 00:26:19 %PAGP-5-PORTTOSTP:Port 2/4 joined bridge port 2/4
Switch-A (enable)
show port channel
No ports channelling
Switch-A (enable)
set port channel 2/1-4 on
Mismatch in vlan number.
Failed to set port(s) 2/1-4 channel mode to on.
Switch-A (enable)
show port channel
No ports channelling
