01-23-2012 09:51 PM - edited 03-07-2019 04:30 AM
Hi
I set up a port-channel trunk between a acess switch 3750 ( int gi2/0/1 and gi2/0/2) and Core 6509( int gi7/11 and gi7/12).
On the both the 3750& 6509 I configured:
interface Port-channel15
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 100,103
switchport mode trunk
and config all the interfaces gi2/0/1 and gi2/0/2
interface gi2/0/1 and 2 and gi7/11 and gi7/12 as below:
switchport trunk encapsulation dot1q
switchport trunk native vlan111
switchport trunk allowed vlan 100.103
switchport mode trunl
channel-group 15 mode active
but the ports on the core g7/11 and g7/12 keep shutdown and when i do
show interfaces port-channel 15
it show the interface is shutdown.
Any advice is much appreciated.
Thanks
lq
Solved! Go to Solution.
01-24-2012 03:29 PM
Please post the error message when it shutdown.. Also make sure you have the native vlan command under the port channel SVI's on each side.
01-23-2012 10:14 PM
>>switchport trunk allowed vlan 100.103
>>switchport mode trunl
You have a period, this is incorrect, is this a typo?
Same for sw mo trunl.....
Have you verified all ints on this port channel are not shutdown (not the port channel but the ints)?
01-24-2012 03:25 AM
Are all the physical interfaces up ? Please post the output of show etherchannel summary.
01-24-2012 02:15 PM
hi,
sorry there are a typo in the config posted.
The steps I did was:
set up 2 trunks between the 3750 and core 6509.
set these 4 interfaces to be up - establish a link.
then config the port-channel interfaces in 3750 , then 6509.
config the 4 interfaces to be on port-channels.
then i got a warning message that the 2 interfaces on the 3750 got SHUTDOWN.
and the port-channels on both switches got SHUTDOWN.
when I do show etherchannel sum -it show the port-channel is down.
I always took these configs out the switches - just in case it cause any further issues.
I can do it again if needed.
Thanks
leq
01-24-2012 03:29 PM
Please post the error message when it shutdown.. Also make sure you have the native vlan command under the port channel SVI's on each side.
01-24-2012 04:38 PM
glen.grant wrote:
Please post the error message when it shutdown.. Also make sure you have the native vlan command under the port channel SVI's on each side.
I did not have native VLAN command - maybe that would cause the issues
Currently the configs and the switches state are:
6509
interface g7/11 and g7/12 - up - no port-channel config yet
port-channel15 - shutdown
3750 interface gi2/0/1 and gi2/0/2 - up - no port-channel config
port-channel15 - shutdown
NOW I config both the ints gi2/0/1 and 2 with the comand: channel-group 15 mode active
THEN, the 3750 shut down both the int gi2/0/1 and 2
the log on the 3750 is:
Jan 25 11:19:31.205 AEST: %EC-5-PORTDOWN: Shutting down Gi2/0/1 as its port-channel is admin-down
Jan 25 11:19:31.649 AEST: %EC-5-PORTDOWN: Shutting down Gi2/0/2 as its port-channel is admin-down
Jan 25 11:19:31.943 AEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan111, changed state to down
Jan 25 11:19:32.060 AEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan111, changed state to up
Jan 25 11:19:33.210 AEST: %LINK-5-CHANGED: Interface GigabitEthernet2/0/1, changed state to administratively down
Jan 25 11:19:33.654 AEST: %LINK-5-CHANGED: Interface GigabitEthernet2/0/2, changed state to administratively down
Jan 25 11:19:34.216 AEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/1, changed state to down
Jan 25 11:19:34.661 AEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/2, changed state to down
in both 3750& 6509 switches' config I did not have "switchport trunk native vlan111"
just these lines below:
"interface Port-channel15
description IS port channel
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 100,103
switchport mode trunk"
01-24-2012 06:22 PM
enable native vlan111 on both the SVI on both sides and it works beautifully.
Thanks all.
Very much appreciated
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