IEWBv4 - Lab 18, task 1.3 - question.

From: Ben (ccieben@cox.net)
Date: Tue Mar 20 2007 - 15:33:13 ART

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Hi GS,

I know there will be a great big 'EUREKA' light bulb in my head when
someone explains this task, but at the moment I'm really struggling with
what's happening here..

My interpretation of this task means using a L2 protocol tunnel on SW1 &
SW2 to forward the PAgP packets from SW3 to SW4. However, when I do a
shut/no shut on Po10 (on SW3/SW4 in either order) - the ports are
suspended even before what seems to be a chance for them to fully come up.

I tried placing the "spanning-tree portfast" on SW1/SW2 to see if was an
issue with how quickly PAgP requests were being forwarded... I have also
changed SW1 & SW2 ports to access ports with no luck. Vlan 100 exists
on both SW1 & SW2 (connected by a trunk on each fa0/14 port)

Can anyone shed some light on where I've gone wrong with this task?

Thanks in advance.

Ben

Errors for SW3 (same errors also occur on SW4):
Rack5SW3(config-if)#int po10
Rack5SW3(config-if)#no shut
Rack5SW3(config-if)#
04:14:58: %LINK-3-UPDOWN: Interface FastEthernet0/13, changed state to down
04:14:58: %LINK-3-UPDOWN: Interface FastEthernet0/14, changed state to down
Rack5SW3(config-if)#
04:15:00: %EC-5-L3DONTBNDL1: Fa0/13 suspended: PAgP not enabled on the
remote port.
04:15:00: %EC-5-L3DONTBNDL1: Fa0/14 suspended: PAgP not enabled on the
remote port.
Rack5SW3(config-if)#
04:15:01: %LINK-3-UPDOWN: Interface FastEthernet0/13, changed state to up
04:15:01: %LINK-3-UPDOWN: Interface FastEthernet0/14, changed state to up

Here are my configs:
!SW1
interface FastEthernet0/16
 switchport access vlan 100
 switchport mode dot1q-tunnel
 l2protocol-tunnel point-to-point pagp
 no cdp enable
 spanning-tree portfast
 spanning-tree bpdufilter enable
end
!
interface FastEthernet0/17
 switchport access vlan 100
 switchport mode dot1q-tunnel
 l2protocol-tunnel point-to-point pagp
 no cdp enable
 spanning-tree portfast
 spanning-tree bpdufilter enable

!SW2
interface FastEthernet0/19
 switchport access vlan 100
 switchport mode dot1q-tunnel
 l2protocol-tunnel point-to-point pagp
no cdp enable
 spanning-tree portfast
 spanning-tree bpdufilter enable
!
interface FastEthernet0/21
 switchport access vlan 100
 switchport mode dot1q-tunnel
 l2protocol-tunnel point-to-point pagp
no cdp enable
 spanning-tree portfast
 spanning-tree bpdufilter enable

!SW3
interface FastEthernet0/13
 no switchport
 no ip address
 channel-group 10 mode desirable**
**!
interface FastEthernet0/14
 no switchport
 no ip address
 channel-group 10 mode desirable
!
interface Port-channel10
 no switchport
 ip address 156.5.109.9 255.255.255.0

!SW4
interface FastEthernet0/16
 no switchport
 no ip address
 channel-group 10 mode desirable
!
interface FastEthernet0/18
 no switchport
 no ip address
 channel-group 10 mode desirable
!
interface Port-channel10
 no switchport
 ip address 156.5.109.10 255.255.255.0

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