07-26-2018 07:53 PM - edited 03-08-2019 03:45 PM
Hi Folks,
I am having a hard time to get a trunk link working between Cisco 4500X and Brocade VDX 6740
Network Diagram attached, there are currently 4 Interfaces connected between two switches as port-channel and it's access port, the new link I am connecting is a trunk link so I can test few things before converting the port-channel to a trunk.
Issue: whenever i bring the new link up all ports in the port-channel goes into error-disabled state
Logs below
appreciate any help on this.
Jul 26 15:44:25.443: %LINK-3-UPDOWN: Interface TenGigabitEthernet2/1/20, changed state to up
Jul 26 15:44:28.657: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet2/1/20, changed state to up
Jul 26 15:44:31.038: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on TenGigabitEthernet2/1/11 (X), with SW02 (same switch) TenGigabitEthernet2/1/20 (1).
Jul 26 15:44:32.076: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on TenGigabitEthernet2/1/11 (X), with SW02 (same switch) TenGigabitEthernet2/1/20 (1).
Jul 26 15:44:33.058: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on TenGigabitEthernet2/1/11 (X), with SW02 (same switch) TenGigabitEthernet2/1/20 (1).
Jul 26 15:44:34.073: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on TenGigabitEthernet2/1/11 (X), with SW02 (same switch) TenGigabitEthernet2/1/20 (1).
Jul 26 15:44:35.067: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on TenGigabitEthernet2/1/11 (X), with SW02 (same switch) TenGigabitEthernet2/1/20 (1).
Jul 26 15:44:35.540: %UDLD-4-UDLD_PORT_DISABLED: UDLD disabled interface Te2/1/11, neighbor mismatch detected
Jul 26 15:44:35.540: %PM-4-ERR_DISABLE: udld error detected on Te2/1/11, putting Te2/1/11 in err-disable state
Jul 26 15:44:35.542: %EC-5-UNBUNDLE: Interface Te2/1/11 left the port-channel Po10
Jul 26 15:44:36.092: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on TenGigabitEthernet2/1/12 (X), with SW02 TenGigabitEthernet2/1/20 (1).
Jul 26 15:44:36.549: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet2/1/11, changed state to down
Jul 26 15:44:35.641: %EC-5-UNBUNDLE: STANDBY:Interface Te2/1/11 left the port-channel Po10
Jul 26 15:44:37.075: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on TenGigabitEthernet2/1/12 (X), with SW02 TenGigabitEthernet2/1/20 (1).
Jul 26 15:44:37.549: %LINK-3-UPDOWN: Interface TenGigabitEthernet2/1/11, changed state to down
Jul 26 15:44:41.037: %UDLD-4-UDLD_PORT_DISABLED: UDLD disabled interface Te2/1/12, neighbor mismatch detected
Jul 26 15:44:41.037: %PM-4-ERR_DISABLE: udld error detected on Te2/1/12, putting Te2/1/12 in err-disable state
Jul 26 15:44:41.039: %EC-5-UNBUNDLE: Interface Te2/1/12 left the port-channel Po10
Jul 26 15:44:42.045: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet2/1/12, changed state to down
Jul 26 15:44:41.155: %EC-5-UNBUNDLE: STANDBY:Interface Te2/1/12 left the port-channel Po10
Jul 26 15:44:43.046: %LINK-3-UPDOWN: Interface TenGigabitEthernet2/1/12, changed state to down
Jul 26 15:44:53.046: %UDLD-4-UDLD_PORT_DISABLED: UDLD disabled interface Te1/1/12, neighbor mismatch detected
Jul 26 15:44:53.046: %PM-4-ERR_DISABLE: udld error detected on Te1/1/12, putting Te1/1/12 in err-disable state
Jul 26 15:44:53.048: %EC-5-UNBUNDLE: Interface Te1/1/12 left the port-channel Po10
Jul 26 15:44:54.051: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/12, changed state to down
Jul 26 15:44:53.046: %EC-5-UNBUNDLE: STANDBY:Interface Te1/1/12 left the port-channel Po10
Jul 26 15:44:55.059: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to down
Jul 26 15:45:04.061: %UDLD-4-UDLD_PORT_DISABLED: UDLD disabled interface Te2/1/20, unidirectional link detected
Jul 26 15:45:04.061: %PM-4-ERR_DISABLE: udld error detected on Te2/1/20, putting Te2/1/20 in err-disable state
Jul 26 15:45:05.068: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet2/1/20, changed state to down
Jul 26 15:45:06.075: %LINK-3-UPDOWN: Interface TenGigabitEthernet2/1/20, changed state to down
Jul 26 15:45:18.058: %LINK-5-CHANGED: Interface TenGigabitEthernet2/1/20, changed state to administratively down
Jul 26 15:47:32.726: %LINK-5-CHANGED: Interface TenGigabitEthernet2/1/11, changed state to administratively down
Jul 26 15:47:36.148: %LINK-3-UPDOWN: Interface TenGigabitEthernet2/1/11, changed state to up
Jul 26 15:47:40.409: %EC-5-BUNDLE: Interface Te2/1/11 joined port-channel Po10
Jul 26 15:47:41.417: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet2/1/11, changed state to up
Jul 26 15:47:40.509: %EC-5-BUNDLE: STANDBY:Interface Te2/1/11 joined port-channel Po10
Jul 26 15:47:45.043: %LINK-5-CHANGED: Interface TenGigabitEthernet2/1/12, changed state to administratively down
Jul 26 15:47:47.910: %LINK-3-UPDOWN: Interface TenGigabitEthernet2/1/12, changed state to up
Jul 26 15:47:52.154: %EC-5-BUNDLE: Interface Te2/1/12 joined port-channel Po10
Jul 26 15:47:53.155: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet2/1/12, changed state to up
Jul 26 15:47:52.250: %EC-5-BUNDLE: STANDBY:Interface Te2/1/12 joined port-channel Po10
Jul 26 15:48:11.470: %LINK-5-CHANGED: Interface TenGigabitEthernet1/1/12, changed state to administratively down
Jul 26 15:48:16.426: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to down
Jul 26 15:48:18.623: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/12, changed state to up
Jul 26 15:48:22.238: %EC-5-BUNDLE: Interface Te1/1/12 joined port-channel Po10
Jul 26 15:48:23.250: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/12, changed state to up
Jul 26 15:48:22.349: %EC-5-BUNDLE: STANDBY:Interface Te1/1/12 joined port-channel Po10
SW02#sh run int po10
interface Port-channel10
switchport
switchport access vlan X
end
SW02#sh run int te2/1/20
!
interface TenGigabitEthernet2/1/20
switchport mode trunk
shutdown
end
07-27-2018 08:07 AM
According to the error messages you just need to specify the native vlan on both sides of the trunk link.
it is best practice to create a unused separate native VLAN on both switches
ex,
vlan 5
name NEW_NATIVE
interface po 2
switchport mode trunk
swithport trunk native vlan 5
interface TenGigabitEthernet2/1/20
switchport mode trunk
swithport trunk native vlan 5
channel-group 2 mode (choose between ACTIVE or ON (lacp or strict))
***Do the same for the Brocade, but the commands may be different*******
HTH-
Vince
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