Re: prefix and acl

Don't mess with Marko! That's my brother from another mother...

http://t.co/ggHcHwFO

Sent from my iPhone

On Jun 25, 2012, at 11:47 AM, marc abel <marcabel_at_gmail.com> wrote:

> Here you are again arguing (and being very rude) to a CCIE again (Marko is
> actually a 2X CCIE). The only reason you find the question vague is because
> you lack the knowledge to understand the question. Marko was taking the
> time to try to explain it and more detail to you and you act ungrateful and
> tell him to think before he responds.
>
> You should probably consider going to a CCNP study group until you have a
> stronger foundation to discuss these topics, or at the very least learn to
> be respectful and admit that it is YOU that needs more explanation and to
> ask for it nicely.
>
> -Marc Abel
> CCIE #35470
>
> On Sun, Jun 24, 2012 at 6:50 PM, john matijevic <john.matijevic_at_gmail.com>wrote:
>
>> Marko,
>>
>> Hasse was very vague with his question, since you understood what his
>> question is I asked you to state it. Then Hasse responded with
>> clarification.
>> Please think before you respond.
>>
>> Regards
>> John
>>
>>
>> On 6/24/12, Marko Milivojevic <markom_at_ipexpert.com> wrote:
>>> He's asking can he filter a specific prefix using an extended access
>>> list, instead of using a prefix list. He gives an example where he
>>> tried with a prefix-list and the example where he tried an acl, with
>>> obviously different results. Someone very quickly pointed out the
>>> difference, with the link to the Cisco's and INE's blog describing the
>>> particular use-case. Case closed, moving on. Don't overthink the
>>> questions.
>>>
>>> --
>>> Marko Milivojevic - CCIE #18427 (SP R&S)
>>> Senior CCIE Instructor - IPexpert
>>>
>>> On Sun, Jun 24, 2012 at 3:29 PM, john matijevic
>>> <john.matijevic_at_gmail.com> wrote:
>>>> Good Afternoon Marko,
>>>>
>>>> Please enlighten us.
>>>>
>>>> Here is the question:
>>>>
>>>> Can I do this with an acl or extended cal,
>>>>
>>>>
>>>> Please clarify what this is? I don't understand what he is asking?
>>>>
>>>> Regards,
>>>> John
>>>> On 6/24/12, Marko Milivojevic <markom_at_ipexpert.com> wrote:
>>>>> He did post the config snippets. I think the question was very clear.
>>>>> So were the answers :-)
>>>>>
>>>>> --
>>>>> Marko Milivojevic - CCIE #18427 (SP R&S)
>>>>> Senior CCIE Instructor - IPexpert
>>>>>
>>>>> On Sun, Jun 24, 2012 at 12:27 PM, john matijevic
>>>>> <john.matijevic_at_gmail.com> wrote:
>>>>>> 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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>
>
> --
> Marc Abel
> CCIE #35470
> (Routing and Switching)
>
>
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Received on Mon Jun 25 2012 - 12:07:38 ART