03-02-2014 01:55 AM - edited 03-03-2019 07:18 AM
I have a Cisco 2960 switch that is not allowing me to setup switchport trunk encapsulation dot1q on a trunking interface.
The show capabilities shows that the interface can use 802.1q, but when I try to CLI the command the work encapsulation is not an option.
Please advise with a solution.
Thanks, S
Model - WS-C2960G-24TC-L
SW Version - 12.2(44)SE6
SW Image - C2960-LANBASEK9-M
S1#
S1#sh int gi0/23 capabilities
GigabitEthernet0/23
Model: WS-C2960G-24TC-L
Type: 1000BaseLX SFP
Speed: 1000
Duplex: full
Trunk encap. type: 802.1Q
Trunk mode: on,off,desirable,nonegotiate
Channel: yes
Broadcast suppression: percentage(0-100)
Flowcontrol: rx-(off,on,desired),tx-(none)
Fast Start: yes
QoS scheduling: rx-(not configurable on per port basis),
tx-(4q3t) (3t: Two configurable values and one fixed.)
CoS rewrite: yes
ToS rewrite: yes
UDLD: yes
Inline power: no
SPAN: source/destination
PortSecure: yes
Dot1x: yes
Multiple Media Types: rj45, sfp, auto-select
S1#
S1#
S1#
S1(config-if)#switchport ?
access Set access mode characteristics of the interface
backup Set backup for the interface
block Disable forwarding of unknown uni/multi cast addresses
host Set port host
mode Set trunking mode of the interface
nonegotiate Device will not engage in negotiation protocol on this
interface
port-security Security related command
priority Set appliance 802.1p priority
protected Configure an interface to be a protected port
trunk Set trunking characteristics of the interface
voice Voice appliance attributes
S1#
S1#
S1#
S1(config-if)#switchport trunk ?
allowed Set allowed VLAN characteristics when interface is in trunking mode
native Set trunking native characteristics when interface is in trunking
mode
pruning Set pruning VLAN characteristics when interface is in trunking mode
S1#
S1#
S1#
Solved! Go to Solution.