From: Michael Whittle (mgwhittle@gmail.com)
Date: Fri Mar 21 2008 - 13:15:00 ART
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