08-04-2022 02:44 PM
Hi,
I have created Vlans and in the Multilayer switch when I tried giving "switchport trunk encapsulation dot1q" it's not accepting.
can someone help me please.
08-04-2022 02:48 PM
the newer iOS is just sw mo trunk
you can use the ? to see the sub commands. also make sure the port is clear of other configs.
08-04-2022 02:55 PM
switchport mode trunk
then
switchport trunk encapsulation
if above not support
then some SW support by default dot1x no need encapsulation command.
08-04-2022 03:02 PM - edited 08-04-2022 03:02 PM
ill be life saver and tell you default interface PortNumber is the command to clear a port interface.
This command clears the config of a port. A lot of the command I short hand. As you noticed I typed sw mo tr its the shorthand for switchport mode trunk. encap dot1q is only used in older iOS versions.
08-04-2022 03:21 PM - edited 08-04-2022 04:42 PM
Use c3560 to have that command; c3650 or c2960 do not have it; I think only c3560s and c2950s have that in PT. Cisco has dropped its ISL encap protocol in all new switch models; so there is no need to specify dot1q encap method as it is default.
you can use show int gigabitEthernet 1/0/6 switchport to see default settings like encapsulation
Regards, ML
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08-04-2022 03:25 PM
08-04-2022 05:51 PM
What I am trying to say that not all switches will support "switchport trunk encapsulation dot1q" command; Since there is only Dot1.Q encapsulation method that standard nowadays; Older Cisco proprietary ISL is being faced out. This relates to Real IOS and virtual ones including PT which is simulator and does not run on real IOS. PT is wonderful tool to learn networking and IOS at CCNA level but it is a simulator with several features and commands missing. You are using c3650, which does not have that command. I think only c3560s and c2950s have dot1q encap command; try it on 3560 switch in PT. I think it is the same in real device but I am Not 100% sure.
Regards, ML
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