From: Scott Vermillion (scott_ccie_list@it-ag.com)
Date: Mon Jan 07 2008 - 16:13:23 ARST
JG,
It would be helpful if you told us which lab you're referring to. But
basically, you establish a trunk between a given router and the switch it
has a physical connection to. That is one single trunk. The trunk itself
doesn't extend anywhere else. Then you can establish as many subinterfaces
on the router end as you need. The switches all have interconnecting
trunks, which carry the VLAN traffic to where ever it needs to go. Then you
have other routers with other trunks which exist only between the router and
its physically attached switch. You establish subinterfaces as required
and, again, allow the inter-switch trunks to carry the traffic as required.
Just start off with two routers attached to two different switches.
Establish the router-switch trunks and the inter-switch trunks. Then
establish the subinterfaces and configure them according to the topology
drawing. Do some pining. It should start to become clear at that point...
Regards,
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of John
Sent: Monday, January 07, 2008 9:33 AM
To: ccielab@groupstudy.com
Subject: IWEB Vol4 task 1.5 trunking
I am tasked with configuring dot1q trunking between R4, R5, SW3, and SW4.
R4
is trunking to R5 via e0/0.45. R4 is trunking to SW3 via e0/0.49. R5 is
trunking to SW4 via e0/0.40. R5 is trunking to R4 via e0/1.45. R5 is
trunking to SW3 via e0/1.59. R5 is trunking to SW4 via e0/1.50.
I'm having problems understanding a couple of things. first how R4 and R5
for example can have trunks to three different devices coming into a single
interface. second in the diagram it has the interfaces for the trunks on
the
switches as vlan40 and vlan50 on SW4 and vlan49 on SW3. Those are not
physical interfaces. The solution says that I should be configuring SW2
f0/4
and SW3 f0/5. I'll assume that SW2 is supposed to be SW4 it's still short
one
trunk port.
How am I supposed to determine which switch interfaces to use in a situation
like this and if someone can please explain how three devices each with a
seperate physical connection can attatch to a single physical interface on
another device I would appreciate it
thanks
JG
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