[c-nsp] stange vlan 1 output

[Pete Templin]

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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