If you have a large amount of traffic, broadcasting etc. You would split it
up between floors. Many places do use switches and Vlans to do this. If you
have a different company on each floor, you would not want to constantly
"share" traffic with them. Or if you had global resources on one floor and
users, department resources in another. There are many other reasons why you
would do this. Routing between floors in my experience with large buildings
in NYC is so that each floor can have it's own subnet and resources confined
to that floor, as well as route to the building supplied link to the
Internet or other "buiding" resources.
-----Original Message-----
From: RAUL RENTERIA [mailto:[EMAIL PROTECTED]]
Sent: Friday, July 07, 2000 2:08 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: Connecting 3 subnets with Cisco routers??
I was under the impression you have 3 lans you want to route with one
router. Why do you want to use 3 routers to connect 3 lans? Let's say for
example......lan 1 is on floor 1, lan 2 is on floor 2, lan 3 is on floor 3.
if you want these to route the simplest thing would be to connect all nodes
on each floor to a hub/switch per floor; then have all drops meet in one
closet to a patch panel/hub/switch, to the ethernet on the (1)router. I
don't see why you would need (3)routers...
ANYBODY ELSE WANTS TO GIVE A SHOT AT THIS..........???
Raul Renteria.ccna.network analyst.NYC.
>From: "Niraj Palikhey" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: [EMAIL PROTECTED]
>Subject: Re: Connecting 3 subnets with Cisco routers??
>Date: Fri, 07 Jul 2000 13:18:30 EDT
>
>Hi Raul,
>Thank you for the info.
>
>So you are saying that only one ethernet port would be used on each router
>to connect all 3 subnets? So would these ethernet ports plug into the
>switch and connect to the subnets?
>
>One question, I had is why can't serial cables using the back-to-back cable
>be used to connect these 3 subnets? The ethernet port on the router would
>connect to the local subnet and the serial would connect this subnet to the
>other subnet. Is this right?
>
>Please advise.
>Thank you.
>Niraj
>
>
>>From: "RAUL RENTERIA" <[EMAIL PROTECTED]>
>>To: [EMAIL PROTECTED]
>>Subject: Re: Connecting 3 subnets with Cisco routers??
>>Date: Fri, 07 Jul 2000 15:39:03 GMT
>>
>>1)The way to connect 3 subnets that are lans would be through your
>> ethernet.
>>2)You can create a default gateway on the same ethernet port for each
>> subnet as a "secondary ip" on that interface. or.....
>>3)You can create virtual interfaces on the same physical interface
>> separately for each subnet, creating a default gateway for each.
>>4)Build a routing table to include all subnets to be routed.
>>5)I think tha'ts it.........
>>6) GOOD LUCK.
>>
>>Raul Renteria.ccna.network analyst.NYC.
>>
>>
>>
>>>From: "Niraj Palikhey" <[EMAIL PROTECTED]>
>>>Reply-To: "Niraj Palikhey" <[EMAIL PROTECTED]>
>>>To: [EMAIL PROTECTED]
>>>CC: [EMAIL PROTECTED]
>>>Subject: Connecting 3 subnets with Cisco routers??
>>>Date: Fri, 07 Jul 2000 10:20:24 EDT
>>>
>>>Hi,
>>>If you are given a Class C network, eg. 207.96.46.0 and you had to create
>>>3
>>>subnets for 3 floors of your bldg., how would you use routers to connect
>>>these 3 subnets and go out on the Internet? (Without using any internal
>>>addresses ie 10, 172, 192). I know that the mask is going to be
>>>255.255.255.224 with 30 hosts on each subnet. My question is, do you
>>>connect
>>>these 3 subnets using the Ethernet interfaces or using the serial? And if
>>>you use either, what would be the ip addressess for the default gateways
>>>on
>>>all 3 subnets? How would the hosts on each subnet know how to get to the
>>>other subnet?
>>>Please advise.
>>>Thank you.
>>>Kind regards,
>>>[EMAIL PROTECTED]
>>>________________________________________________________________________
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>>
>
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