From: Michael Whittle (mgwhittle@gmail.com)
Date: Fri Mar 21 2008 - 13:12:07 ART
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