[c-nsp] Active Portchannel - Adding new member fails

[John Gill]

Sorry, I believe the mailer or my mail was delayed a bit and I didn't 
see the previous response.

This is bad behavior, your config looks good. I suspect it could be this 
bug:
CSCsd11234    ports fail to bundle when nonegotiate is configured

What version of software are you running?

Release note mentions this (found on 4500, but applicable to desktop 
switch code too):
If a physical interface is configured in shutdown mode, then configured 
with the same configuration including "switchport nonegotiate," when it 
is later enabled by the no shutdown command, it can not join the bundle 
and the following error message displays:

%EC-5-CANNOT_BUNDLE2: Gi3/16 is not compatible with Po1and will be 
suspended (trunk mode of Gi3/16 is dynamic, Po1 is trunk)


The following configuration sequence will prevent interface g3/16 from 
joining the bundle:

int g3/16
shut
switchport mode trunk
switchport nonegotiate
channel-group 1 mode on


int po1
switchport trunk enacp dot1q
switchport mode trunk
switchport nonegotiate

int g3/16
  no shut


Workaround: Do NOT configure the channel-port with the same 
configuration while all physical ports are still in shutdown mode. 
Instead, issue the unshutdown command on the physical ports to carry 
over the first unshutdown to the channel port. (CSCsd11234)

Regards,
John Gill
cisco


On 7/27/11 6:05 PM, mb at adv.gcomm.com.au wrote:
> Quoting John Gill <johgill at cisco.com>:
>
>> Can you check the config on port-channel 2? perhaps there is
>> difference between port trunk config of 0/20 and the channel trunk
>> config.
>>
>
> Thanks for the response - Already just sent that info, but here it is
> again:
>
> interface Port-channel2
> description FEC_TO_ESW02_BNE
> switchport trunk allowed vlan
> 1,11,12,14,30,35,68,99,100,103,104,106-108,112
> switchport trunk allowed vlan add
> 113,115,120-123,129,132-136,138,156,158,160
> switchport trunk allowed vlan add
> 206,289,311,312,340,345,377-396,398,399,402
> switchport trunk allowed vlan add
> 422,444,472,473,475,478-488,492,493,497,498
> switchport trunk allowed vlan add
> 500,546,590,591,700,801-806,808,809,811-815
> switchport trunk allowed vlan add
> 865,866,868,869,957,970,973,974,978,987,1829
> switchport trunk allowed vlan add 2501,2506,2516,2518-2525
> switchport mode trunk
> switchport nonegotiate
>
> #sh interface port-channel 2 switchport Name: Po2
> Switchport: Enabled
> Administrative Mode: trunk
> Operational Mode: trunk
> Administrative Trunking Encapsulation: dot1q
> Operational Trunking Encapsulation: dot1q
> Negotiation of Trunking: Off
> Access Mode VLAN: 1 (default)
> Trunking Native Mode VLAN: 1 (default)
> Voice VLAN: none
>
>
> And as stated, the portchan is currently up and running with FA0/21
>
> #sh int port-channel 2 Port-channel2 is up, line protocol is up (connected)
> Hardware is EtherChannel, address is 0017.5af5.6695 (bia 0017.5af5.6695)
> Description: FEC_TO_ESW02_BNE
> MTU 1530 bytes, BW 100000 Kbit, DLY 1000 usec, reliability 255/255,
> txload 87/255, rxload 116/255
> Encapsulation ARPA, loopback not set
> Full-duplex, 100Mb/s, media type is unknown media type
> input flow-control is off, output flow-control is off
> Members in this channel: Fa0/21 ARP type: ARPA, ARP Timeout 04:00:00
> Last input 00:00:00, output 09:28:14, output hang never
> Last clearing of "show interface" counters never
> Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
> Queueing strategy: fifo
>
>
>
>
> -------------------------------------------------------------------------
> This e-mail was sent via GCOMM WebMail http://www.gcomm.com.au/
>
>