[c-nsp] stange vlan 1 output

[Nick Cutting]

You could add switchport nonnegotiate to force it to trunk. Kill the dtp
But usually it is not needed

-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of james list
Sent: Friday, October 7, 2016 1:44 PM
To: Pete Templin <petelists at templin.org>
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] stange vlan 1 output

There is firewall on the other side...

Thanks all for the hints!

Il 07/Ott/2016 19:41, "Pete Templin" <petelists at templin.org> ha scritto:

> DTP faulted on the port in question, causing it to not trunk even 
> though the mode is trunk.
>
> Any chance the adjacent device is a 4948? I've seen that platform do 
> this a lot where the 4948 participates in DTP enough for the other 
> side to drop to access but the 4948 forgets to match it.
>
>
> On 10/7/2016 9:17 AM, james list wrote:
>
>> Hi experts,
>>
>> an issue on my c6500 sup720 12.2(33)SXI5.
>>
>>
>>
>> I have two equal trunk configuration ports:
>>
>>
>>
>> xxx#sh run int g8/45
>>
>> interface GigabitEthernet8/45
>>
>> switchport
>>
>>   switchport trunk encapsulation dot1q
>>
>>   switchport trunk allowed vlan 269
>>
>>   switchport mode trunk
>>
>>   logging event link-status
>>
>>   logging event trunk-status
>>
>>   load-interval 30
>>
>>   spanning-tree portfast edge trunk
>>
>>
>>
>> xxx#sh run int g9/27
>>
>> interface GigabitEthernet9/27
>>
>> switchport
>>
>>   switchport trunk encapsulation dot1q
>>
>>   switchport trunk allowed vlan 48
>>
>>   switchport mode trunk
>>
>>   logging event link-status
>>
>>   logging event trunk-status
>>
>>   load-interval 30
>>
>>   udld port
>>
>>   spanning-tree portfast edge trunk
>>
>>
>>
>> Do you see any reason why using "show interface status" I see vlan 1 
>> associated to g9/27 instead of trunk as for example of interface g8/45 ?
>>
>>
>>
>> xxx#sh interface status
>>
>> Port            Name                              Status       Vlan
>>       Duplex  Speed Type
>>
>> Gi8/45       xxxx                            connected    trunk
>> full   1000 1000BaseT
>>
>> Gi9/27       xxxx                             connected    1
>>    full   1000 1000BaseT
>>
>>
>>
>> I see as well native vlan is not associated to gi9/27
>>
>>
>>
>> xxx#sh interfaces trunk
>>
>>
>>
>> Port                Mode         Encapsulation  Status        Native vlan
>>
>> Te1/1               on           802.1q         trunking      1
>>
>> Te1/2               on           802.1q         trunking      1
>>
>> Te1/3               on           802.1q         trunking      1
>>
>> Te1/4               on           802.1q         trunking      1
>>
>> Te2/1               on           802.1q         trunking      1
>>
>> Te2/2               on           802.1q         trunking      1
>>
>> Te2/3               on           802.1q         trunking      1
>>
>> Te3/4               on           802.1q         trunking      1
>>
>> Te3/6               on           802.1q         trunking      1
>>
>> Te3/7               on           802.1q         trunking      1
>>
>> Te3/8               on           802.1q         trunking      1
>>
>> Te7/1               on           802.1q         trunking      1
>>
>> Te7/3               on           802.1q         trunking      1
>>
>> Te7/9               on           802.1q         trunking      1
>>
>> Te7/13              on           802.1q         trunking      1
>>
>> Te7/14              on           802.1q         trunking      1
>>
>> Gi8/3               on           802.1q         trunking      1
>>
>> Gi8/9               on           802.1q         trunking      1
>>
>> Gi8/13              on           802.1q         trunking      1
>>
>> Gi8/29              on           802.1q         trunking      1
>>
>> Gi8/30              on           802.1q         trunking      1
>>
>> Gi8/43              on           802.1q         trunking      1
>>
>> Gi8/44              on           802.1q         trunking      1
>>
>> Gi8/45              on           802.1q         trunking      1
>>
>> Gi9/8               on           802.1q         trunking      1
>>
>> Gi9/9               on           802.1q         trunking      1
>>
>> Gi9/17              on           802.1q         trunking      1
>>
>> Gi9/18              on           802.1q         trunking      1
>>
>> Gi9/20              on           802.1q         trunking      1
>>
>> Gi9/21              on           802.1q         trunking      1
>>
>> Gi9/29              on           802.1q         trunking      1
>>
>> Gi9/30              on           802.1q         trunking      1
>>
>> Gi9/33              on           802.1q         trunking      1
>>
>> Gi9/35              on           802.1q         trunking      1
>>
>> Gi9/40              on           802.1q         trunking      1
>>
>> Gi9/43              on           802.1q         trunking      1
>>
>> Gi9/45              on           802.1q         trunking      1
>>
>> Gi9/46              on           802.1q         trunking      1
>>
>>
>>
>> Thanks in advance for any feedback.
>>
>>
>> Cheers
>>
>> James
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>>
>
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