Hi,
Thats because in the example they are doing the summary on the same
interface.
What im doing is on a different interface all-together.
The IP configured between R1 and R2 is: 192.168.0.66/28 (R2), what
gets advertised to R3 (172.16.0.0) with autosummary and split-horizon in
place, is correctly 192.168.0.0/24 (because of autosummary):
on R3:
R 192.168.0.0/24 [120/1] via 172.16.0.1, 00:00:08, Serial0/0
Just for kicks, i tried to disable it anyways, still the same:
R2 sending this:
*Mar 1 00:08:52.484: 192.168.0.0/24 via 0.0.0.0, metric 1, tag 0
Again, it would seem auto-summary takes preference.. when i disable it,
it advertises the manu. summary.
Thanks for your time..
Sincerely,
Kim Pedersen
Adrian Brayton wrote:
> I understand what split-horizon is and does but it just wont advertise
> it "out" if split-horizon is enabled...
>
> "If split horizon is enabled, neither autosummary nor interface
> summary addresses (those configured with the ip summary-address rip
> command) are advertised."
>
>
>
>
> On Aug 25, 2009, at 10:24 AM, Kim Pedersen wrote:
>
>> Hi,
>>
>> Its not learning that address from that interface so split horizon is
>> not an issue. As you can see it advertises just fine, just the wrong
>> thing :)
>>
>> Sincerely,
>> Kim Pedersen
>>
>> Adrian Brayton wrote:
>>> I guess my next question is have you disabled split horizon on that
>>> interface?
>>>
>>> If you don't, it wont advertise the summary address!
>>>
>>> -Adrian
>>>
>>>
>>> On Aug 25, 2009, at 10:04 AM, Kim Pedersen wrote:
>>>
>>>> Hi Adrian (and Joe),
>>>>
>>>> To correct my summary, i actually had (though it wont have any
>>>> effect), " ip summary-address rip 192.168.0.0 255.255.255.128"
>>>> which is within the scope.
>>>>
>>>> Yes.. its version 2:
>>>> Automatic network summarization is in effect
>>>> Mar 1 01:26:40.955: RIP: build update entries
>>>> *Mar 1 01:26:40.959: 192.168.0.0/24 via 0.0.0.0, metric 1, tag 0
>>>>
>>>> As you can see it still sends out with /24
>>>>
>>>> A bit weird.. also in the documentation i posted, they actually do
>>>> run V1 (send version 1 and receive 1 and 2)
>>>>
>>>> Adrian Brayton wrote:
>>>>> Hey Kim,
>>>>>
>>>>> Have you set RIP to use version 2 and no auto-summary?
>>>>>
>>>>> If you dont have that set, RIP will never see a subnet other than
>>>>> at class full boundaries?
>>>>>
>>>>> Let us know!
>>>>>
>>>>> -Adrian
>>>>>
>>>>>
>>>>>
>>>>> On Aug 25, 2009, at 9:46 AM, Kim Pedersen wrote:
>>>>>
>>>>>> Hi All,
>>>>>>
>>>>>> So i was playing around with RIP (As i usually do when im bored
>>>>>> :) ),
>>>>>> and i came across an issue where my results dont agree with the
>>>>>> Cisco
>>>>>> documentation. What im talking about is the manual summary ("ip
>>>>>> summary-address rip <network> <mask>").
>>>>>>
>>>>>> According to:
>>>>>> http://www.cisco.com/en/US/docs/ios/12_1/iproute/command/reference/1rdrip.html#wp1025730
>>>>>>
>>>>>>
>>>>>> The use of a manual summary address, should override the
>>>>>> auto-summary
>>>>>> functionality. This does not match up to what im able to lab up:
>>>>>>
>>>>>> R1 <-> R2 <-> R3.
>>>>>>
>>>>>> On R2, i have the 192.168.0.64/28 configured. between R2 and R3 is
>>>>>> 172.16.0.0, so its a different major net. Rip should with
>>>>>> autosummary
>>>>>> summarize the 192.168.0.64 subnet to 255.255.255.0... This works
>>>>>> perfectly.
>>>>>>
>>>>>> When i then try on the interface between R2 and R3, and do a "ip
>>>>>> summary-address rip 192.168.0.64 255.255.255.128" it should
>>>>>> override the
>>>>>> autosummary, and send this network as a /25 instead of a /24.
>>>>>>
>>>>>> Anyone able to elaborate on this?
>>>>>>
>>>>>> Thanks!
>>>>>>
>>>>>> Sincerely,
>>>>>> Kim Pedersen
>>>>>>
>>>>>> --
>>>>>>
>>>>>> // Freedom Matters
>>>>>> // Follow my progress on: http://kpjungle.wordpress.com
>>>>>>
>>>>>> _______________________________________________
>>>>>> For more information regarding industry leading CCIE Lab
>>>>>> training, please visit www.ipexpert.com
>>>>>
>>>>
>>>> --
>>>>
>>>> // Freedom Matters
>>>> // Follow my progress on: http://kpjungle.wordpress.com
>>>>
>>>
>>
>> --
>>
>> // Freedom Matters
>> // Follow my progress on: http://kpjungle.wordpress.com
>>
>
--
// Freedom Matters
// Follow my progress on: http://kpjungle.wordpress.com
_______________________________________________
For more information regarding industry leading CCIE Lab training, please visit
www.ipexpert.com
