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Actually I tried with ip subnet-zero but the command does not affect incoming routing updates..only the networks that we advertise.

From: shiran guez [mailto:shiranp3@gmail.com] Sent: 19 dEKEMWRI 2007 G. 15:15 To: Lora Ganeva Cc: ccielab@groupstudy.com Subject: Re: rip networks filtering

my mistake didnt saw the range sign

Subodh given you the correct answer!
On Dec 19, 2007 2:11 PM, Lora Ganeva wrote:
Hi experts,

I am experiencing some problems with the following task:

Two routers , let’s say R1 and R2 are connected (media is not important, let’s say it is Ethernet)

R1 Eth1/0—————150.1.1.0/24————- Eth1/0 R2

R1:

Eth1/0
Ip add 150.1.1.1 255.255.255.0

R2:
Eth1/0
Ip add 150.1.1.2 255.255.255.0

Routers are running rip and R2 is advertising the following networks to R1

199.16.0.0/24
199.16.1.0/24
199.16.2.0/24
199.16.3.0/24
199.16.4.0/24
199.16.5.0/24
199.16.6.0/24
199.16.7.0/24
199.16.8.0/24
199.16.10.0/24
199.16.11.0/24
199.16.12.0/24
199.16.13.0/24
199.16.14.0/24
199.16.15.0/24

The task requires by configuring only R1 (not interface level command) to allow with an ACL with only 2 lines the following subnets:

199.16.1.0/24 - 199.16.8.0/24

I have though a lot of any kind of ACLs but i still haven’t come to a good solution.

Any help will be appreciated,

Thanks,
Lora