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Trunked VLAN is not showing up on the other side of the trunk.

Mogwai
Level 1
Level 1

Hello, we've got two switches in this scenario SW4500 & SW3172. SW4500 has trunk port Te2/1/18 that's connected to SW3172 on Eth1/52/1.  The VLAn in question is VLAN 604.  The trunk port on SW4500 has the following config: 

description SW3172
switchport trunk allowed vlan 8,56,60,64,152,200,600-605,995
switchport mode trunk
switchport nonegotiate
auto qos trust
spanning-tree cost 5000
service-policy input AutoQos-4.0-Input-Policy
service-policy output AutoQos-4.0-Output-Policy

The other side of the trunk on SW3172 is the following:

description sw4500
switchport mode trunk
spanning-tree cost 5000
speed 10000
no shutdown

The switch SW4500, does show VLAN 604 from a 'sh vlan brief.'

The switch SW3172, does NOT show the VLAN. 

From my understanding, since VTP is enabled, shouldn't VLAn 604 be appearing on SW3172?   

1 Accepted Solution

Accepted Solutions

Hello @Mogwai ,

is that device a Nexus switch from interface naming it looks like Eth1/52/1 ?

no VTP support on nexus

You need to create manually the VLAN on it

 

Nexus# show vtp ?
^
% Invalid parameter detected at '^' marker.
Nexus#

Hope to help

Giuseppe

 

View solution in original post

11 Replies 11

share for both SW
show vlan brief 
show interface trunk 
show interface switchport 
show vtp

Added the requested info as a doc.

add in SW3172 vlan 604 
by command 
vlan 604

MHM

I can do that, but shouldn't VTP have propagated the VLAN over the trunk?

Show vtp status <<- not show vtp interface 

Share this please

Thanks 

MHM

Hello @Mogwai ,

is that device a Nexus switch from interface naming it looks like Eth1/52/1 ?

no VTP support on nexus

You need to create manually the VLAN on it

 

Nexus# show vtp ?
^
% Invalid parameter detected at '^' marker.
Nexus#

Hope to help

Giuseppe

 

Thanks I didn't realize that the Nexus switches don't support VTP. 

But you share in text 

Show vtp interface which show vtp enable in ports in sw3xxx?

Can you share show vtp status for this SW

MHM

please check below

MHM

Hello @Mogwai ,

ok modern Nexus switches can support VTP but by default VTP is disabled and you need see @MHM Cisco World's later post.

feature vtp

to enable it and related commands

I have tested the show command in a production Nexus 9000 but I cannot activate the vtp feature on it so I got the error message.

 

Hope to help

Giuseppe

 

@Mogwai @Giuseppe Larosa 
to be clear I found the issue here 
NSK support VTP but 

VTP worked only in transparent mode in the Cisco Nexus 9000 Series devices, allowing you to extend a VTP domain across the device.

that Why VLAN not push from VTP server to NSK and it need to manually add.

Thanks 

MHM

 

 

 

 

 

 

 

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