From: Koen Zeilstra (koen@koenzeilstra.com)
Date: Tue Oct 23 2007 - 03:38:21 ART
Correct. However for watching two routes this isn't a solution.
Two match clauses in different subblocks cause the default to be
announced when the first clause is a match. What we need is de default
to be announced when BOTH match clauses have a positive match.
Quoting Benedict Munyao <bmunyao@gmail.com>:
> The first solution examined in this thread included using "neighbor
> default-originate route-map" command. The Doccd clarifies why it only uses
> the "or" logic when comparing the two ACLs:
>
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hirp_r/rte_pih.htm#wp1123413
>
> "Like matches in the same route map subblock are filtered with "or"
> semantics. If any one match clause is matched in the entire route map
> subblock, this match is treated as a successful match. Dissimilar match
> clauses are filtered with "and" semantics. So dissimilar matches are
> filtered logically. If the first set of conditions is not met, the second
> match clause is filtered."
>
> HTH
> Benedict Munyao
>
>
>
> On 10/19/07, Koen Zeilstra <koen@koenzeilstra.com> wrote:
>>
>> Balmik has email this nice solution to me which I would like to share
>> with the group.
>>
>> Balmik, I hope you don't mind that I send this to the group.
>>
>> I have tested this on my lab and the results in various situations on
>> different platforms
>>
>> Situation 1. It only checks line 10 of the route-map, and ignores the
>> rest.
>> Situation 2. It does a OR. So both routes have to dissapear to remove
>> the default instead of one.
>>
>> From:
>>
>> http://www.cisco.com/en/US/products/ps6566/products_feature_guide09186a00801a7f7a.html#wp1038479
>>
>> I read that outbound BGP route-maps only are supported. I would say
>> this is a outbound BGP route-map. The only different from standard
>> advertisement is de conditional default. Maybe it is only intended for
>> match and set operations on advertised routes.
>>
>>
>>
>> ----- Forwarded message from balmik@staff.iinet.net.au -----
>> Date: Fri, 19 Oct 2007 14:07:49 +0800
>> From: Balmik Soin <balmik@staff.iinet.net.au>
>> Reply-To: Balmik Soin <balmik@staff.iinet.net.au>
>> Subject: RE: conditional default advertising in BGP with multiple
>> routes tomonitor
>> To: Koen Zeilstra <koen@koenzeilstra.com>, Bob Sinclair
>> <bob@bobsinclair.net>
>> Cc: Saul Arjona <saul.arjona.bueno@gmail.com>
>>
>> (Removing CCIE groupstudy list for this email)
>>
>> I'm not able to test this at the moment, but can I suggest you try a
>> CONTINUE route-map statement to try and get an AND working?
>>
>> Something like a
>>
>> Route-map XXX permit 10
>> Match ip address prefix-list 1
>> Continue 30
>>
>> Route-map XXX deny 20
>>
>> Route-map XXX permit 30
>> Match ip address prefix-list 2
>>
>> I don't know if "continue" will work for these kinds of route-maps, but
>> it's worth a try - if it works, then you can post it to GroupStudy. I
>> just didn't want to post a "perhaps" email to the group without testing
>> it, and ending up wasting people's time :)
>>
>> --
>> Balmik Soin
>> Voice Network Engineer Desk: +61-8-9213-1370
>> Voice Engineering - Network Services Mobile: +61-414-429-266
>> iiNet Limited balmik@staff.iinet.net.au
>>
>>
>> > -----Original Message-----
>> > From: Koen Zeilstra [mailto:koen@koenzeilstra.com]
>> > Sent: Friday, 19 October 2007 1:14 PM
>> > To: Bob Sinclair
>> > Cc: Balmik Soin; Saul Arjona; ccielab@groupstudy.com
>> > Subject: Re: conditional default advertising in BGP with multiple
>> routes
>> > tomonitor
>> >
>> > Yes we do have a solution for the OR, now we still need a solution for
>> > the AND function. Matching both routes for one descision.
>> >
>> >
>> >
>> > Quoting Bob Sinclair <bob@bobsinclair.net>:
>> >
>> > > Koen Zeilstra wrote:
>> > >> Correct. The conditions are never met for ACL 10.
>> > >>
>> > >> I have labbed the original and this solution up, no AND just OR.
>> > >>
>> > > Absolutely right! I stand corrected. So do we have a solution for
>> OR?
>> > >
>> > > --
>> > >
>> > >
>> > > Bob Sinclair CCIE 10427 CCSI 30427
>> > > www.netmasterclass.net
>> >
>>
>>
>>
>> ----- End forwarded message -----
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Fri Nov 16 2007 - 13:11:18 ART