From: Hobbs (deadheadblues@gmail.com)
Date: Sun Aug 24 2008 - 15:31:29 ART
Gaurav,
On all other trunks coming from SW4 to the other switches remove vlans 100
and 200:
interface fa0/x
switchport trunk allowed vlan remove 100,200
This should be done on regular trunk links from SW4->SW2, SW4->SW3,SW4->SW1
On Sun, Aug 24, 2008 at 8:44 AM, Pavlo Bykov <slidersv@gmail.com> wrote:
> 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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