Re: prefix and acl

Good Afternoon,

"Can I do this with an acl or extended cal, I have a Brain Freeze
Thanks."

What is this?

Very vague, can you please be more specific and describe exactly the
issue or problem that you are trying to solve?

Please post network diagram and configurations.

Regards,
John

On 6/24/12, Sarad <tosara_at_gmail.com> wrote:
> Hi Hasse,
>
> We can use a extended access-list in BGP to replace a prefix-list, But in
> IGP it appears differently as extended accesslist represent the route
> source and subnet (not subnet and subnet mask)
>
> Have a look at this
> http://blog.internetworkexpert.com/2008/01/04/using-extended-access-lists-in-a-distribute-list/
>
> Cheers
> Sara
>
>
>
> On Sun, Jun 24, 2012 at 11:12 PM, <daniel.dib_at_reaper.nu> wrote:
>
>> Hi Hasse,
>>
>> You are trying to match every class C address with /24 mask right? This
>> is
>> not possible with a standard ACL. If you used extended ACL you could
>> match
>> mask like this.
>>
>> access-list 100 permit 192.0.0.0 31.255.255.255 host 255.255.255.0
>>
>> However I think this is only supported in BGP.
>>
>> /Daniel
>>
>>
>> On Sun, 24 Jun 2012 14:02:01 +0200, Hasse wrote:
>>
>>> Can I do this with an acl or extended cal, I have a Brain Freeze
>>> Thanks.
>>>
>>> R2#show run | sec rip
>>> router rip
>>> version 2
>>> network 10.0.0.0
>>> distribute-list prefix 1 in FastEthernet0/0
>>> no auto-summary
>>>
>>> R2#show run | sec prefix-list
>>> ip prefix-list 1 seq 5 permit 192.0.0.0/3 ge 24 le 24
>>>
>>> R2#show ip route rip
>>> R 223.1.1.0/24 [120/1] via 10.1.12.1, 00:00:19, FastEthernet0/0
>>> R 200.1.1.0/24 [120/1] via 10.1.12.1, 00:00:19, FastEthernet0/0
>>> R 192.1.1.0/24 [120/1] via 10.1.12.1, 00:00:19, FastEthernet0/0
>>> R 195.1.1.0/24 [120/1] via 10.1.12.1, 00:00:19, FastEthernet0/0
>>>
>>> if I am using a standard ACL
>>>
>>>
>>> Standard ACL
>>> R2#show run | sec rip
>>> router rip
>>> version 2
>>> network 10.0.0.0
>>> distribute-list 1 in FastEthernet0/0
>>> no auto-summary
>>>
>>> R2#show run | sec access-list
>>> access-list 1 permit 192.0.0.0 31.255.255.0
>>>
>>> R2#show ip ro rip
>>> R 223.1.1.0/24 [120/1] via 10.1.12.1, 00:00:07, FastEthernet0/0
>>> R 200.1.1.0/24 [120/1] via 10.1.12.1, 00:00:07, FastEthernet0/0
>>> 193.1.1.0/25 is subnetted, 1 subnets
>>> R 193.1.1.0 [120/1] via 10.1.12.1, 00:00:07, FastEthernet0/0
>>> R 192.1.1.0/24 [120/1] via 10.1.12.1, 00:00:07, FastEthernet0/0
>>> R 195.1.1.0/24 [120/1] via 10.1.12.1, 00:00:07, FastEthernet0/0
>>> 194.1.1.0/26 is subnetted, 1 subnets
>>> R 194.1.1.0 [120/1] via 10.1.12.1, 00:00:07, FastEthernet0/0
>>>
>>>
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Received on Sun Jun 24 2012 - 12:27:46 ART