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Trunked VLANs Dropping

mikeyggeary
Level 1
Level 1

Good Afternoon,

I was wondering if someone could point me in the right direction to fix this issue. Any help in the matter would be much appreciated. Please let me know if any other information is needed.

Here is what is happening:

Between every minute to 5 minutes, all VLANs except the native drop packets and stop responding for about 10-25 seconds. There are no Ethernet, STP, or CDP errors recorded.

Ethernet port configs:

c2950-1#sho run int fa0/14

Building configuration...

Current configuration : 175 bytes

!

interface FastEthernet0/14

switchport access vlan 112

switchport trunk native vlan 112

switchport mode trunk

-==-=-=-=-==-

c2940-2# sho run int fa0/1

Building configuration...

Current configuration : 141 bytes

!

interface FastEthernet0/1

  switchport access vlan 112

switchport trunk native vlan 112

switchport mode trunk

16 Replies 16

post output for both ports w/ switchport status

sh int fa 0/14 switchport

sh int fa 0/1 switchport

Unfortunately, the site is about 5 hours from me. I need to schedule a contractor to get out there and do the cable swap.

Here is the output of sho switchport:

Master

sho int fa0/14 switchport

Name: Fa0/14

Switchport: Enabled

Administrative Mode: trunk

Operational Mode: trunk

Administrative Trunking Encapsulation: dot1q

Operational Trunking Encapsulation: dot1q

Negotiation of Trunking: On

Access Mode VLAN: 1 (default)

Trunking Native Mode VLAN: 112 (10.128.7.64/27_TeljetCore)

Administrative private-vlan host-association: none

Administrative private-vlan mapping: none

Operational private-vlan: none

Trunking VLANs Enabled: ALL

Pruning VLANs Enabled: 2-1001

Protected: false

Voice VLAN: none (Inactive)

Appliance trust: none

Remote:

sho int fa0/1 switchport

Name: Fa0/1

Switchport: Enabled

Administrative Mode: trunk

Operational Mode: trunk

Administrative Trunking Encapsulation: dot1q

Operational Trunking Encapsulation: dot1q

Negotiation of Trunking: On

Access Mode VLAN: 1 (default)

Trunking Native Mode VLAN: 112 (10.128.7.64/27_TeljetCore)

Voice VLAN: none

Administrative private-vlan host-association: none

Administrative private-vlan mapping: none

Administrative private-vlan trunk native VLAN: none

Administrative private-vlan trunk encapsulation: dot1q

Administrative private-vlan trunk normal VLANs: none

Administrative private-vlan trunk private VLANs: none

Operational private-vlan: none

Trunking VLANs Enabled: ALL

Pruning VLANs Enabled: 2-1001

Capture Mode Disabled

Capture VLANs Allowed: ALL

Protected: false

Appliance trust: none


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