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Native VLAN mismatch between VSS 6509 and 3560

varunk2k3
Level 1
Level 1

Hi,

I am getting logs on Access switch 3560 CDP native VLAN mismatch, i've validated the configuration on both switch but still we are getting the error.

bly-VSS-core01#sh run int  po 40

Building configuration...

Current configuration : 330 bytes

!

interface Port-channel40

description Link to bly-09-01s2

switchport

switchport trunk encapsulation dot1q

switchport trunk native vlan 230

switchport trunk allowed vlan 1,2,7,13,65,105,136,137,152,223,230,253,502,548

switchport trunk allowed vlan add 550,551,873

switchport mode trunk

no mls qos channel-consistency

end

bly-VSS-core01#sh interfaces trunk module 3

Port                Mode         Encapsulation  Status        Native vlan

Gi1/3/1             on           802.1q         trunking      950

Gi1/3/2             on           802.1q         trunk-inbndl  1

                                      (Po49)

Gi1/3/3             on           802.1q         trunk-inbndl  1

                                      (Po50)

Gi1/3/13            on           802.1q         trunk-inbndl  230

                                      (Po40)

Gi1/3/14            on           802.1q         trunk-inbndl  230

bly-VSS-core01#sh cdp neighbors  Gi1/3/13 detail

-------------------------

Device ID: bly-09-01s2

Entry address(es):

  IP address: 191.255.1.173

Platform: cisco WS-C3560G-48TS,  Capabilities: Switch IGMP

Interface: GigabitEthernet1/3/13,  Port ID (outgoing port): GigabitEthernet0/49

Holdtime : 167 sec

Version :

Cisco IOS Software, C3560 Software (C3560-IPBASE-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2007 by Cisco Systems, Inc.

Compiled Thu 19-Jul-07 18:15 by nachen

advertisement version: 2

Protocol Hello:  OUI=0x00000C, Protocol ID=0x0112; payload len=27, value=00000000FFFFFFFF0102250A00000000000004FE7F752680FF0000

VTP Management Domain: '****************'

Native VLAN: 230 (Mismatch)

Duplex: full

Management address(es):

  IP address: 191.255.1.173

bly-VSS-core01#

bly-09-01s2# sh run int po 10

Building configuration...

Current configuration : 289 bytes

!

interface Port-channel10

description Link to bly-VSS-core01

switchport trunk encapsulation dot1q

switchport trunk native vlan 230

switchport trunk allowed vlan 1,2,7,13,65,105,136,137,152,223,230,253,502,548

switchport trunk allowed vlan add 550,551,873

switchport mode trunk

end

Port        Mode         Encapsulation  Status        Native vlan

Gi0/45      auto         negotiate      other         1

Gi0/46      auto         negotiate      other         1

Gi0/47      auto         negotiate      other         1

Gi0/48      auto         negotiate      other         1

Gi0/49      on           802.1q         trunk-inbndl  230

                                      (Po10)

Gi0/50      on           802.1q         trunk-inbndl  230

                                      (Po10)

bly-09-01s2#sh cdp neighbors  d

-------------------------

Device ID: bly-VSS-core01

Entry address(es):

  IP address: 191.255.1.10

Platform: cisco WS-C6509-E,  Capabilities: Router Switch IGMP

Interface: GigabitEthernet0/50,  Port ID (outgoing port): GigabitEthernet2/3/13

Holdtime : 142 sec

Version :

Cisco IOS Software, s72033_rp Software (s72033_rp-IPSERVICESK9_WAN-M), Version 12.2(33)SXH5, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2009 by Cisco Systems, Inc.

Compiled Thu 16-Apr-09 19:28 by prod_rel_team

advertisement version: 2

VTP Management Domain: '**************'

Native VLAN: 1 (Mismatch)

Duplex: full

Management address(es):

  IP address: 191.255.1.10

.

Sep 23 02:05:55.653: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet0/49 (230), with bly-VSS-core01 GigabitEthernet1/3/13 (1).

Sep 23 02:06:11.206: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet0/50 (230), with bly-VSS-core01 GigabitEthernet2/3/13 (1).

3 Replies 3

It looks like 6509 switch still believe vlan 1 is the native vlan. Please check "show interfaces g1/3/13 switchport" & "show interfaces g2/3/13 switchport" confirms trunking native vlan is 230.

Post that output if you could

HTH

Rasika

**** Please rate all useful responses ****

I think if i disable the switchport on 6509 it will resolve the problem.

bly-VSS-core01#show interfaces g2/3/13 switchport

Name: Gi2/3/13

Switchport: Enabled

Administrative Mode: trunk

Operational Mode: trunk (member of bundle Po40)

Administrative Trunking Encapsulation: dot1q

Operational Trunking Encapsulation: dot1q

Negotiation of Trunking: On

Access Mode VLAN: 1 (default)

Trunking Native Mode VLAN: 230 (SIDES-JumpStart)

Administrative Native VLAN tagging: enabled

Operational Native VLAN tagging: disabled

Voice VLAN: none

Administrative private-vlan host-association: none

Administrative private-vlan mapping: none

Operational private-vlan: none

Trunking VLANs Enabled: 1,2,7,13,65,105,136,137,152,223,230,253,502,548,550,

     551,873

Pruning VLANs Enabled: 2-1001

Capture Mode Disabled

Capture VLANs Allowed: ALL

Unknown unicast blocked: disabled

Unknown multicast blocked: disabled

bly-VSS-core01#

Hi Varun,

Are you seeing this logs after any recent configuration change? What IOS version you are running on both devices? Could you please try removing the interfaces from the bundle and try reapplying the channel-group command back on the interface and verify if you see any improvement?

Regards

Najaf

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