06-19-2018 12:39 AM - edited 03-08-2019 03:24 PM
Hi,
I searched bug tool and other resources for this behaviour. Am I missing somthing obvious, or is this a bug?
Configuration is not saved to port channel interface. It´s also removed when shutting down a port channel, like "conf t - int po1 - shut - no shut"...
also:
(config)#int po1
(config-if)#desc Core
(config-if)#switchport mode trunk
(config-if)#int te1/1/1
(config-if)#desc Core
(config-if)#channel-group 1 mode active
(config-if)#inte ten1/1/2
(config-if)#channel-group 1 mode active
(config-if)#desc Core
(config-if)#exit
(config)#exit
#wr
#sh runn int po1
Building configuration...
Current configuration : 49 bytes
!
interface Port-channel1
description Core
end
Someone seen this behaviour before?
Model is WS-C3850-48XS Version 16.8.1a
Solved! Go to Solution.
06-19-2018 02:14 AM
Hello
L2 etherchannel
conf t
default int range te1/1/1 -2
int range te1/1/1 -2
shut
channel-group 1 mode active
exit
int po1
switchport mode trunk
switchport trunk allowed vlan x x x
exit
int range te1/1/1 -2
no shut
exit
res
Paul
06-19-2018 01:48 AM
- Did you configure the member interfaces first ?
M.
06-19-2018 01:58 AM
No, I did it just like the snippet above. This snippet/configuration was made just to verify the problem and can be reproduced.
A collegue of mine pointed out that I had missed some configuration the first time it happened. Oh well, that could happen of course (That I missed some config), but when it happened a second time I was sure that I had not missed it. I went back in the configuration logs in my terminal program and verified that I had not missed it. Reproduced the snippet above just to verify.
06-19-2018 02:12 AM
I mean, one could argue that member switchport configuration could differ in one portchannel bundle, and therefore, one should do the member switchport configuration before joining them to a port channel, but I have not seen this behaviour before.
06-19-2018 02:17 AM
>one should do the member switchport configuration before joining them to ...
- I believe it would be advisable to work that way.
M.
06-19-2018 02:14 AM
Hello
L2 etherchannel
conf t
default int range te1/1/1 -2
int range te1/1/1 -2
shut
channel-group 1 mode active
exit
int po1
switchport mode trunk
switchport trunk allowed vlan x x x
exit
int range te1/1/1 -2
no shut
exit
res
Paul
06-19-2018 02:32 AM
This seems to work. However, I´m not able to reproduce the problem anymore, no matter how I configure it. The one thing that differs is that I´m not able to try it on a live port as it is in production now...
I will keep an eye on this an post any changes if there are any. Thanks for all your input.
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