Re: understanding redistribution

You can tag all you want ;-) You can't get a route from protocol X to Y
and then to Z from Y on the same router.

-- 
Brian Dennis, CCIEx5 #2210 (R&S/ISP-Dial/Security/SP/Voice)
bdennis_at_ine.com
INE, Inc.
http://www.INE.com
On 5/9/13 1:00 PM, "Tony Singh" <mothafungla_at_gmail.com> wrote:
>Hey where's your tagging & community lists to prevent double
>redistribution ;)
>
>Brian one thing when we enable tagging to prevent the original routes
>being re-learnt back in I never seem to get any hits on the route-maps in
>bytes....anyone seen this?
>
>Real gear btw
>
>--
>BR
>
>Tony
>
>Sent from my iPad
>
>On 9 May 2013, at 19:47, Brian Dennis <bdennis_at_ine.com> wrote:
>
>> If you redistribute protocol X into protocol Y, protocol X's routes
>>can't
>> go into protocol Z from protocol Y.  You need to also redistribute
>> protocol X directly into protocol Z to get protocol X's routes into
>> protocol Z.  This may not be easy to follow but it's important to
>> understand.
>> 
>> The reason behind this is that redistribution is done from the RIB
>> (routing table) and not done directly between routing protocols.  If you
>> redistribute protocol X into protocol Y then Y will get protocol X's
>> dynamic routes that are in the RIB (show ip route X) and for IPv4, by
>> default, the connected interfaces that protocol X is enabled on (i.e.
>> network statement, ip ospf 1 area 0, etc)
>> 
>> So in your case if you didn't redistribute say static into BGP but are
>> redistributing static into EIGRP, BGP will not get the static routes
>>that
>> are redistributed into EIGRP when EIGRP is redistributed into BGP.
>> 
>> -- 
>> Brian Dennis, CCIEx5 #2210 (R&S/ISP-Dial/Security/SP/Voice)
>> bdennis_at_ine.com
>> 
>> INE, Inc.
>> http://www.INE.com
>> 
>> 
>> 
>> 
>> On 5/9/13 11:14 AM, "Cisco Fanatic" <ebay_products_at_hotmail.com> wrote:
>> 
>>> I am not sure if I understand this. If we are mutually redistributing
>>> between
>>> say EIGRP and BGP does it matter which protocol we redistribute
>>>connected
>>> and
>>> static routes in?
>>> 
>>> router eigrp 1000
>>> redistribute connected
>>> redistribute bgp 65001 metric 15000 5 255 1 4470 router bgp 65001
>>> redistribute static
>>> redistribute eigrp 1000
>>> ******** OR **************
>> 
>>> router eigrp 1000
>>> redistribute static
>>> redistribute bgp 65001 metric 15000 5 255 1 4470 router bgp 65001
>>> redistribute connected
>>> redistribute eigrp 1000
>>> -Yuri
>>> 
>>> 
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