From: John (jgarrison1@austin.rr.com)
Date: Tue Jan 08 2008 - 03:27:55 ARST
Thanks everyone. My bad, I've never refrenced the physical layout of the
lab, the diagram has always sufficed. The appearance of 3 physical
interfaces connecting to a physical interfacei n the diagram threw me off
----- Original Message -----
From: "Ben Holko" <ben@holnet.net>
To: "John" <jgarrison1@austin.rr.com>; <ccielab@groupstudy.com>
Sent: Monday, January 07, 2008 5:08 PM
Subject: RE: IWEB vol4 lab 6 task 1.5 trunking
> The L3 interfaces on the switches are SVI's, not switchports, so as long
> as there are trunks up and running between switches 2, 3 and 4, you
> don't need to configure any ports as L3 on switches 3 and 4 for this
> part of the topology.
>
> Ben
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> John
> Sent: Tuesday, 8 January 2008 5:41 AM
> To: ccielab@groupstudy.com
> Subject: Re: IWEB vol4 lab 6 task 1.5 trunking
>
> 1. As you noted R4 has a connection through e0/0's subinterfaces to R5,
> SW4,
> and SW3. R4's e0/0 is one physical connection. how is it possible to
> have
> 3 physical connections terminate at one physical interface. I'm missing
>
> some logic there.(yes, I'm looking in the switching guide right now,
> haven't
> found it yet.)
>
> 2. Looking at the diagram and at the running configs how am I supposed
> to
> determine which switchports are connected to which routers? Once I've
> determined that I can config them as l3trunks. Again the only clue I
> get
> from the diagram is the vlan interface ID. Although I can now see that
> by
> IWEB's logic I can guess that for R4 it's f0/4 on SW3 and SW4 and f0/5
> on
> SW4 and SW3 for R5. The solution only has one port on each switch being
>
> configured (I'm missing logic and it's probably the same thing thats
> giving
> me a headache on issue 1). There has to be a better way to determine
> which
> switchports I need to configure.
> ----- Original Message -----
> From: "Joseph Brunner" <joe@affirmedsystems.com>
> To: "'John'" <jgarrison1@austin.rr.com>; <ccielab@groupstudy.com>
> Sent: Monday, January 07, 2008 11:27 AM
> Subject: RE: IWEB vol4 lab 6 task 1.5 trunking
>
>
>> >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 separate physical connection can attach to a single
> physical
>>>interface on another device I would appreciate it
>>
>> Looking at the diagram, its clear
>> 1. R4 & R5 are trunked to each other on vlan 45
>> 2. R5 is trunked to switch4's vlan 50 svi on vlan 50
>> 3. R5 is trunked to switch3's vlan 59 svi on vlan 59
>> 4. R4 is trunked to switch4's vlan 40 svi on vlan 40
>> 5. R4 is trunked to switch3's vlan 49 svi on vlan 49
>>
>> So yes indeed each router has 3 sub-interfaces running dot1q trunk
>> encapsulation. So you are using (and "supposed to determine")
>>
>> 1. Use any physical interface that the routers in the diagrams
> physically
>> are connected to
>> 2. make those interfaces dot1q trunks on the adjacent switches
>> 3. make sure the vlans in question are allowed on those trunks on
> switch
>> to
>> the routers "switchport trunk allowed vlan x,x,x"
>>
>> Once those vlans are active between switches 3,4 it doesn't matter
> which
>> interfaces on the switch fabric connect to those routers, so long as
> you
>> have the switch trunks, switch svi's and router sub-interfaces
> configured
>> it
>> will work.
>>
>> -Joe
>>
>> -----Original Message-----
>> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
>> John
>> Sent: Monday, January 07, 2008 11:05 AM
>> To: ccielab@groupstudy.com
>> Subject: IWEB vol4 lab 6 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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