10-03-2012 03:52 AM - edited 03-07-2019 09:14 AM
Dear,
I have Cisco 1811 and Cisco 2960 interconnect with each other by TRUNK link. As time pass i recieving below log on cisco 1811 router.
DTP-5-NONTRUNKPORTON: Port Fa8 has become non-trunk
LINEPROTO-5-UPDOWN: Line protocol on Interface FastEtherne t8, changed state to down
LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan100, changed state to down
LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan200, changed state to down
LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan300, changed state to down
LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan400, changed state to down
DTP-5-TRUNKPORTON: Port Fa8 has become dot1q trunk
LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan100, changed state to up
LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan200, changed state to up
LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan300, changed state to up
LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan400, changed state to up
Line protocol on Interface FastEthernet8, changed state to up
These two devices interconnecting using fiber media connectors meaning pair of media connectors also present between these two devices.
Kindly help in this regards as soon as possible.
Regards,
Arshad Ahmed
10-03-2012 04:17 AM
Try to hard cord the port with switchport mode trunk command, before that can you share the config of the that port and also show interface <> details.
Try doing the changes at the Both the ends.
10-03-2012 05:09 AM
Dear Hemakumar,]
At both side SWITCHPORT MODE TRUNK command has been hard cord.
below is the output of show switchport command.
Name: Fa8
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Disabled
Access Mode VLAN: 0 ((Inactive))
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 1,100,200,300,400,550,850,998-999
Protected: false
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
Appliance trust: none
Name: Gi0/1
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: 1 (default)
Administrative Native VLAN tagging: enabled
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 Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: 100,200,300,400
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
10-03-2012 05:15 AM
Hi,
could you try switchport nonegotiate on interface G0/1 of the switch
Regards.
Alain
Don't forget to rate helpful posts.
10-03-2012 07:43 AM
Actually you need to disable DTP on both the ends with the command that Alain was suggesting:
conf t
int g0/1
switch none
end
!
and on the opposite end of the cable:
conf t
int fastx/y
switch none
end
!
Make sure that the same native vlan is in place too.
Hope this helps
Alessio
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