The auto-summary and no auto-summary commands have nothing to do with the
ability of EIGRP to work with VLSM.
In EIGRP, automatic summarization takes place in the routing process when
several subnets are entered into the process, subnets which will
automatically be summarized at the higher classful boundary.
For example:
Router eigrp 100
Network 172.16.10.0
Network 172.16.25.0
Network 172.16.204.0
The default auto-summary would summarize this as 172.16.0.0
In theory you should be able to turn off auto-summarization so that you can
perform CIDR summarization on an interface by interface basis.
Interface s0
Summary-address eigrp 100 172.0.0.0 255.0.0.0
For this to work, auto-summarization must be disabled using the no
auto-summary command under the router process.
EIGRP will support the subnets below with no problem.
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
cisco_ccna
Sent: Saturday, August 26, 2000 9:06 PM
To: [EMAIL PROTECTED]
Subject: Re: dividing up the same subnet on 2 diff segments
<< File: vcard.vcf >> Hi,
you need use the command of "no auto-summary", to let router support the
VLSM.
[EMAIL PROTECTED] wrote:
>
> Hi
>
> I have a question? I have two routers okay and I have routing turned on
> both of them (EIGRP). lets say I want to use 10.1.1.0 and I want to be
able
> to to split this subnet into two networks, I know you can use IP
subnet-zero
> to do this, but I want to address the first router E0 Interface with
10.1.1.1
> to 10.1.1.126 and the second router E0 with the second half 10.1.1.127 to
> 10.1.1.254 ok. Now I want to be able to ping each others gateway.
>
> Can I or should I be able to ping each others gateway and have one flat
> segment between 2 router Ethernet segment. Do I need to bridge this? these
> two segments together.
>
> Brian
> Email Address [EMAIL PROTECTED]
>
> ___________________________________
> UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
> FAQ, list archives, and subscription info: http://www.groupstudy.com
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
___________________________________
UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
