From: Michael Whittle (mgwhittle@gmail.com)
Date: Fri Mar 21 2008 - 13:23:08 ART
Ok, worked it out... my solution didn't allow STP to pass over the tunnels
so I had a loop.
Revised solution:
Rack1SW1#sh run int fa0/16
Building configuration...
Current configuration : 204 bytes
!
interface FastEthernet0/16
description Link to Rack1SW3 | FastEthernet0/13
switchport access vlan 100
switchport mode dot1q-tunnel
l2protocol-tunnel cdp
* l2protocol-tunnel stp*
no cdp enable
end
Rack1SW1#sh run int fa0/17
Building configuration...
Current configuration : 204 bytes
!
interface FastEthernet0/17
description Link to Rack1SW3 | FastEthernet0/14
switchport access vlan 200
switchport mode dot1q-tunnel
l2protocol-tunnel cdp
*l2protocol-tunnel stp*
no cdp enable
end
Rack1SW2#sh run int fa0/19
Building configuration...
Current configuration : 179 bytes
!
interface FastEthernet0/19
description Link to Rack1SW4 | FastEthernet0/16
switchport access vlan 100
switchport mode dot1q-tunnel
l2protocol-tunnel cdp
no cdp enable
end
Rack1SW2#sh run int fa0/20
Building configuration...
Current configuration : 202 bytes
!
interface FastEthernet0/20
description Link to Rack1SW4 | FastEthernet0/17
switchport access vlan 200
switchport mode dot1q-tunnel
l2protocol-tunnel cdp
l2protocol-tunnel stp
no cdp enable
end
Cheers,
Mike
On Fri, Mar 21, 2008 at 4:15 PM, Michael Whittle <mgwhittle@gmail.com>
wrote:
> Damn, now why is this happening?
>
> *Mar 2 09:07:37.514: %SW_MATM-4-MACFLAP_NOTIF: Host 0014.6a0a.4e61 in
> vlan 100 is flapping between port Fa0/14 and port Fa0/19
> *Mar 2 09:07:37.514: %SW_MATM-4-MACFLAP_NOTIF: Host 0013.1acb.d8c1 in
> vlan 200 is flapping between port Fa0/20 and port Fa0/14
> *Mar 2 09:07:37.514: %SW_MATM-4-MACFLAP_NOTIF: Host 0014.6a0a.4e61 in
> vlan 200 is flapping between port Fa0/14 and port Fa0/20
> *Mar 2 09:07:37.581: %SW_MATM-4-MACFLAP_NOTIF: Host 0013.1acb.d8c1 in
> vlan 100 is flapping between port Fa0/19 and port F0/14
> Rack1SW2#
> *Mar 2 09:07:52.614: %SW_MATM-4-MACFLAP_NOTIF: Host 0014.6a0a.4e61 in
> vlan 200 is flapping between port Fa0/14 and port Fa0/20
> *Mar 2 09:07:52.614: %SW_MATM-4-MACFLAP_NOTIF: Host 0014.6a0a.4e61 in
> vlan 100 is flapping between port Fa0/14 and port Fa0/19
> *Mar 2 09:07:52.614: %SW_MATM-4-MACFLAP_NOTIF: Host 0013.1acb.d8c1 in
> vlan 200 is flapping between port Fa0/20 and port Fa0/14
> *Mar 2 09:07:52.681: %SW_MATM-4-MACFLAP_NOTIF: Host 0013.1acb.d8c1 in
> vlan 100 is flapping between port Fa0/19 and port Fa0/14
> Rack1SW2#
> *Mar 2 09:08:07.713: %SW_MATM-4-MACFLAP_NOTIF: Host 0014.6a0a.4e61 in
> vlan 200 is flapping between port Fa0/14 and port Fa0/20
> *Mar 2 09:08:07.713: %SW_MATM-4-MACFLAP_NOTIF: Host 0014.6a0a.4e61 in
> vlan 100 is flapping between port Fa0/14 and port Fa0/19
> *Mar 2 09:08:07.713: %SW_MATM-4-MACFLAP_NOTIF: Host 0013.1acb.d8c1 in
> vlan 200 is flapping between port Fa0/20 and port Fa0/14
> *Mar 2 09:08:07.780: %SW_MATM-4-MACFLAP_NOTIF: Host 0013.1acb.d8c1 in
> vlan 100 is flapping between port Fa0/19 and port Fa0/14
> Rack1SW2#
> *Mar 2 09:08:22.813: %SW_MATM-4-MACFLAP_NOTIF: Host 0014.6a0a.4e61 in
> vlan 100 is flapping between port Fa0/14 and port Fa0/19
> *Mar 2 09:08:22.813: %SW_MATM-4-MACFLAP_NOTIF: Host 0013.1acb.d8c1 in
> vlan 200 is flapping between port Fa0/20 and port Fa0/14
> *Mar 2 09:08:22.813: %SW_MATM-4-MACFLAP_NOTIF: Host 0014.6a0a.4e61 in
> vlan 200 is flapping between port Fa0/14 and port Fa0/20
> *Mar 2 09:08:22.880: %SW_MATM-4-MACFLAP_NOTIF: Host 0013.1acb.d8c1 in
> vlan 100 is flapping between port Fa0/19 and port Fa0/14
> Rack1SW2#
>
>
> On Fri, Mar 21, 2008 at 4:12 PM, Michael Whittle <mgwhittle@gmail.com>
> wrote:
>
> > Is anyone as frustrated as I am with the switching questions from Lab 16
> > in the InternetworkExpert labs?
> > 1.1
> >
> > This question says that SW1 and SW2 shouldn't have VLAN45 created on it.
> > In later questions you find out that they expect you to configure all the
> > switches in VTP transparent mode. That's fine but R4 and R5 both in VLAN45
> > need to communicate with each other. R4 is connected to SW4 on Fa0/4 and R5
> > is connected to SW3 on Fa0/5. There is no trunks or access links in VLAN45
> > between SW3 and SW4 so it would need to be via the access links to SW1 and
> > SW2. The question says not to create VLAN45 on them so I would have thought
> > a tunnel would be needed. The solution makes no mention of this. Only
> > includes VLAN100 and VLAN200 and that's all. Why are these VLAN's not
> > created in the 1.4 solution instead? It's just confusing matters.
> >
> > The solution also shows a Vlan3003 interface created with an IP address.
> > This isn't shown in the diagram and wasn't in the question. Any ideas why
> > this was done?
> >
> > 1.2.
> >
> > VLAN3003 only exists on SW3 so why does the solution say it needs to be
> > configured on all switches and trunks?
> >
> > 1.3.
> >
> > The first question says VLAN45 shouldn't be created on SW1 and SW2 but
> > then it says SW1 Fa0/9 and Fa0/10 should be in VLAN45. What is happening
> > here?
> >
> > 1.4.
> >
> > In this question I thought this would provide the tunnel for VLAN45
> > between SW3 and SW4. I configured VLAN45 on the two ports facing SW1 and SW2
> > on both SW3 and SW4 respectively. The solution only mentions the
> > configuration of VLAN45 on the access ports on SW3 and SW4. The tunnel
> > configuration isn't mentioned. I assumed the VLAN100 and VLAN200 must be
> > used for the two tunnels so I configured it as below and I have connectivity
> > between R4 and R5 now. VLAN100 and VLAN200 isn't mentioned in the questions
> > or diagrams. Are you free to just use anything if it's not mentioned?
> >
> > Solution:
> >
> > Rack1SW1#sh run int fa0/16
> > Building configuration...
> >
> > Current configuration : 181 bytes
> > !
> > interface FastEthernet0/16
> > description Link to Rack1SW3 | FastEthernet0/13
> > switchport access vlan 100
> > switchport mode dot1q-tunnel
> > l2protocol-tunnel cdp
> > no cdp enable
> > end
> >
> > Rack1SW1#sh run int fa0/17
> > Building configuration...
> >
> > Current configuration : 181 bytes
> > !
> > interface FastEthernet0/17
> > description Link to Rack1SW3 | FastEthernet0/14
> > switchport access vlan 200
> > switchport mode dot1q-tunnel
> > l2protocol-tunnel cdp
> > no cdp enable
> > end
> >
> > Rack1SW2#sh run int fa0/19
> > Building configuration...
> >
> > Current configuration : 179 bytes
> > !
> > interface FastEthernet0/19
> > description Link to Rack1SW4 | FastEthernet0/16
> > switchport access vlan 100
> > switchport mode dot1q-tunnel
> > l2protocol-tunnel cdp
> > no cdp enable
> > end
> >
> > Rack1SW2#sh run int fa0/20
> > Building configuration...
> >
> > Current configuration : 179 bytes
> > !
> > interface FastEthernet0/20
> > description Link to Rack1SW4 | FastEthernet0/17
> > switchport access vlan 200
> > switchport mode dot1q-tunnel
> > l2protocol-tunnel cdp
> > no cdp enable
> > end
> >
> > I'm moving onto the Frame-Relay section now... just needed that little
> > rant. It's such a pain when the questions and solutions have mistakes. ;(
> >
> > Regards,
> > Mike
This archive was generated by hypermail 2.1.4 : Tue Apr 01 2008 - 07:53:54 ART