From: Pavlo Bykov (slidersv@gmail.com)
Date: Sun Aug 24 2008 - 11:44:12 ART
1. try: no errdisable detect cause l2ptguard
2. You have conflicting commands. For example you post:
interface FastEthernet1/0/15
switchport access vlan 200
switchport trunk encapsulation dot1q
switchport mode dot1q-tunnel
switchport nonegotiate
l2protocol-tunnel stp
l2protocol-tunnel point-to-point lacp
no cdp enable
BUT:
A: dot1q tunnel is not required for l2protocol
B: Switchport trunk command is ignored
Pavlo
On Sat, Aug 23, 2008 at 10:48 AM, GAURAV MADAN <gauravmadan1177@gmail.com>wrote:
> HI All
>
> I am struck badly in bringing my L2 topology UP .
>
>
> SW1 f19 ----------------------f13 SW4 f19 -------------------- f19
> SW3
> f21 ---------------------f15 f21 --------------------
> f21
>
> SW1 and SW3 should form a LACP dot1q trunk .
>
> I guess all my configs are in place properly . But I am not abel to
> bring up the trunk successfully .
> I have done multiple shuts and no shuts .. Didnt helped
>
> I get following error on SW4
>
> Apr 20 19:20:14.563: %PM-4-ERR_DISABLE: l2ptguard error detected on
> Fa1/0/13, putting Fa1/0/13 in err-disable state
> Rack1SW4(config)#
> Apr 20 19:20:15.578: %LINEPROTO-5-UPDOWN: Line protocol on Interface
> FastEthernet1/0/13, changed state to down
> Rack1SW4(config)#
> Apr 20 19:20:16.576: %LINK-3-UPDOWN: Interface FastEthernet1/0/13,
> changed state to down
> Rack1SW4(config)#
>
>
>
>
> My configs are
>
> =========== SW3 and SW1 same configs ================
> Rack1SW3(config)#do sh run int f1/0/19
> Building configuration...
>
> Current configuration : 151 bytes
> !
> interface FastEthernet1/0/19
> switchport trunk encapsulation dot1q
> switchport mode trunk
> switchport nonegotiate
> channel-group 13 mode active
> end
>
> Rack1SW3(config)#do sh run int f1/0/21
> Building configuration...
>
> Current configuration : 151 bytes
> !
> interface FastEthernet1/0/21
> switchport trunk encapsulation dot1q
> switchport mode trunk
> switchport nonegotiate
> channel-group 13 mode active
> end
>
> Rack1SW3(config)#
> Rack1SW3(config)#do sh run int port-c 13
> Building configuration...
>
> Current configuration : 117 bytes
> !
> interface Port-channel13
> switchport trunk encapsulation dot1q
> switchport mode trunk
> switchport nonegotiate
> end
>
> Rack1SW3(config)#
> =========================================== SW4 ===========================
>
> Rack1SW4(config)#do sh run int f1/0/19
> Building configuration...
>
> Current configuration : 233 bytes
> !
> interface FastEthernet1/0/19
> switchport access vlan 100
> switchport trunk encapsulation dot1q
> switchport mode dot1q-tunnel
> switchport nonegotiate
> l2protocol-tunnel stp
> l2protocol-tunnel point-to-point lacp
> no cdp enable
> end
>
> Rack1SW4(config)#do sh run int f1/0/21
> Building configuration...
>
> Current configuration : 233 bytes
> !
> interface FastEthernet1/0/21
> switchport access vlan 200
> switchport trunk encapsulation dot1q
> switchport mode dot1q-tunnel
> switchport nonegotiate
> l2protocol-tunnel stp
> l2protocol-tunnel point-to-point lacp
> no cdp enable
> end
>
> Rack1SW4(config)#do sh run int f1/0/13
> Building configuration...
>
> Current configuration : 233 bytes
> !
> interface FastEthernet1/0/13
> switchport access vlan 100
> switchport trunk encapsulation dot1q
> switchport mode dot1q-tunnel
> switchport nonegotiate
> l2protocol-tunnel stp
> l2protocol-tunnel point-to-point lacp
> no cdp enable
> end
>
> Rack1SW4(config)#do sh run int f1/0/15
> Building configuration...
>
> Current configuration : 233 bytes
> !
> interface FastEthernet1/0/15
> switchport access vlan 200
> switchport trunk encapsulation dot1q
> switchport mode dot1q-tunnel
> switchport nonegotiate
> l2protocol-tunnel stp
> l2protocol-tunnel point-to-point lacp
> no cdp enable
> end
>
> Rack1SW4(config)#
> ==================================================================
>
> Please let me know how to get away with this ?
> I searched the archieves but methods told didnt helped
>
> Thnx in advance
> Gaurav Madan.
>
>
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