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Catalyst switch not coming up on all VLAN interfaces

scsc_tech
Beginner
Beginner

I have a 3650 switch that I am trying to uplink to a 3850.
The link comes up, but not all of my VLANs are communicating properly.

Below are the interface configs for the two switches, and further below is the output on the 3650 when the uplink is plugged in.
Only interfaces vlan1 and vlan7 come up, but 200 is my main config vlan.

 

Any thoughts on what is misconfigured?

 


ws-3850-x

interface TenGigabitEthernet1/0/7
description IDF1
switchport trunk allowed vlan 1,7,20,31,80,102,107,200
switchport mode trunk
auto qos trust dscp
spanning-tree guard root
service-policy input AutoQos-4.0-Trust-Dscp-Input-Policy
service-policy output AutoQos-4.0-Output-Policy
!

ws-3650-24td

interface TenGigabitEthernet1/1/3
description UPLINK PORT
switchport trunk allowed vlan 1,7,20,31,80,102,107,200
switchport mode trunk
!
interface Vlan200
description Corp Vlan
ip address 172.16.15.237 255.255.240.0
!

Output from 3650

*Nov 28 19:01:57.481: %PLATFORM_PM-6-MODULE_INSERTED: SFP module inserted with interface name Te1/1/3
*Nov 28 19:02:01.818: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/3, changed state to up
*Nov 28 19:02:03.818: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/3, changed state to up
*Nov 28 19:02:34.815: %LINK-3-UPDOWN: Interface Vlan1, changed state to up
*Nov 28 19:02:34.816: %LINK-3-UPDOWN: Interface Vlan7, changed state to up
*Nov 28 19:02:35.815: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
*Nov 28 19:02:35.815: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan7, changed state to up

 

I also connected a laptop to one of the access ports which should land on VLAN 200, and it cannot communicate with the rest of the devices on that VLAN

 

interface GigabitEthernet1/0/4
 description ACCESS PORT
 switchport trunk native vlan 200
 switchport trunk allowed vlan 7,200
 switchport mode trunk
 spanning-tree portfast
 spanning-tree bpduguard enable
!

 

1 ACCEPTED SOLUTION

Accepted Solutions

paul driver
VIP Expert VIP Expert
VIP Expert

Hello

 

On the both switches:

vlan 200

exit

 

On each switch interconnect:

Switchport  trunk native vlan 200

 

Access port

ddefault interface x/x

switchport mode access

switchport access vlan 200

switchport voice vlan 7

 


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

View solution in original post

7 REPLIES 7

Georg Pauwen
VIP Master VIP Master
VIP Master

Hello,

 

what is the purpose of the interface below ? It is not an access port, and if it is supposed to be a trunk, it won't work either because you have set the native VLAN to 200 (in order for that to work, the native VLAN on ALL trunks needs to be set to 200).

 

interface GigabitEthernet1/0/4
description ACCESS PORT
switchport trunk native vlan 200
switchport trunk allowed vlan 7,200
switchport mode trunk
spanning-tree portfast
spanning-tree bpduguard enable

 

An access port typically looks like this:

 

interface GigabitEthernet1/0/4
description ACCESS PORT
switchport mode access vlan 200
spanning-tree portfast

That interface needs to be untagged for VLAN200 for corporate and tagged for VLAN7 for voice

 

But just as important is the VLAN200 interface with IP 172.16.15.237 is not reachable from the rest of the network. Which leads me to suspect an issue with the uplink config.

Hello,

 

what is the output of 'show vlan' on both switches ?