Re: Conditional Advertise

I should be wrong on its understanding, Some documentations are not very
clear on the logic of AND/OR, please following link, may be it would give
some clues,

http://www.cisco.com/en/US/docs/ios/12_2/iproute/command/reference/1rfindp1.html#wpxref41157

"Usage Guidelines

An ellipsis (...) in the command syntax indicates that your command input
can include multiple values for the *access-list-number, access-list-name,
or prefix-list-name *arguments.

*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. This process continues until a match occurs or
there are no more match clauses. "

On Sat, Aug 29, 2009 at 7:27 AM, S Malik <ccie.09_at_gmail.com> wrote:

> I think following is AND condition,
>
> route-map ADV permit 10
> match ip addr prefix tarck1
> match ip addr prefix track2
>
>
>
> On Sat, Aug 29, 2009 at 4:36 AM, Sagar Rane <sagar.ccie_at_gmail.com> wrote:
>
>> Thanks for trying that, as I said I cannot get this to work :).
>>
>> Please experts out there if you can provide a solution to meet this
>> requirement below.
>>
>> Bgp should check its bgp routing table for two routes eq (10.1.1.0/24 and
>> 20.2.2.2/32) and *only if both routes are present*, it should originate a
>> route advertisement of 192.168.10.0/24.
>>
>> Regards,
>> Sagar
>>
>> On Sat, Aug 29, 2009 at 8:36 AM, Ahmed Ejaz <aahmedejaz_at_gmail.com> wrote:
>>
>> > I have tried both the solutions and both doesn't work. As soon as the
>> first
>> > statement is matched it exits. If i specify the first prefix in the
>> > route-map along with another prefix as divin said and shut down that
>> > interface, it does the same thing.
>> >
>> > Ahmed.
>> >
>> > On Sat, Aug 29, 2009 at 12:04 PM, Ahmed Ejaz <aahmedejaz_at_gmail.com
>> >wrote:
>> >
>> >> Hi, mine doesn't work :) i am labbing it up ... will let u know
>> >>
>> >> Ahmed
>> >>
>> >> On Sat, Aug 29, 2009 at 11:59 AM, Sagar Rane <sagar.ccie_at_gmail.com
>> >wrote:
>> >>
>> >>> Hi Ahmed,
>> >>>
>> >>> I have tried it and it doesn't work, just see that logic, the exist
>> match
>> >>> crieteria is met , avertise map will advertised it. Now give it a
>> thought,
>> >>> if only tracl1 prefix is avilable , it meets the condition from
>> route-map
>> >>> line 0 and doesn't go to line 20.
>> >>>
>> >>> Hence 192.168 is advertised.
>> >>>
>> >>> Have you tried it and has it worked for you?
>> >>>
>> >>> Regards,
>> >>> Sagar
>> >>>
>> >>> On Sat, Aug 29, 2009 at 7:21 AM, Ahmed Ejaz <aahmedejaz_at_gmail.com
>> >wrote:
>> >>>
>> >>>> I think the goal is to advertise the 192 route if both 10 and 20
>> >>>> networks in the routing table exist. What you have mentioned is same
>> as my
>> >>>> config i-e I am matching 2 networks in one prefix list and you are
>> matching
>> >>>> 2 networks in 2 prefix lists but the route-map will do the same as
>> both the
>> >>>> matches are made in a single statement. If the requirement was to
>> advertise
>> >>>> the 192 network if either 10 or 20 exist (one of them) then the route
>> map
>> >>>> would change for example:
>> >>>>
>> >>>> route-map ADVERTISE permit 10
>> >>>> match ip address prefix TRACK1
>> >>>>
>> >>>> route-map ADVERTISE permit 20
>> >>>> match ip address prefix TRACK2
>> >>>>
>> >>>> REgards
>> >>>>
>> >>>> Ahmed.
>> >>>>
>> >>>> On Sat, Aug 29, 2009 at 11:15 AM, Divin Mathew John <
>> >>>> divinjohn_at_gmail.com> wrote:
>> >>>>
>> >>>>> Wont this trigger the advertise-map if one route is there in the
>> >>>>> routing table?
>> >>>>>
>> >>>>> i thinkthis would do the dew.
>> >>>>>
>> >>>>> ip prefix-list TRACK1 permit 10.1.1.0/24
>> >>>>> ip prefix-list TRACK2 permit 20.2.2.2/32
>> >>>>> ip prefix-list ADVER permit 192.168.10.0/24
>> >>>>>
>> >>>>> route-map ADVERTISE permit 10
>> >>>>> match ip address prefix ADVER
>> >>>>>
>> >>>>> route-map EXIST match-all permit 10
>> >>>>> match ip address prefix TRACK1
>> >>>>> match ip address prefix TRACK2
>> >>>>>
>> >>>>> router bgp xyz
>> >>>>> advertise-map ADVERTISE exist-map EXIST
>> >>>>>
>> >>>>>
>> >>>>> On Sat, Aug 29, 2009 at 11:42 AM, Ahmed Ejaz <aahmedejaz_at_gmail.com
>> >wrote:
>> >>>>>
>> >>>>>> Try this:
>> >>>>>>
>> >>>>>> ip prefix-list TRACK permit 10.1.1.0/24
>> >>>>>> ip prefix-list TRACK permit 20.2.2.2/32
>> >>>>>> ip prefix-list ADVER permit 192.168.10.0/24
>> >>>>>>
>> >>>>>> route-map ADVERTISE permit 10
>> >>>>>> match ip address prefix ADVER
>> >>>>>>
>> >>>>>> route-map EXIST permit 10
>> >>>>>> match ip address prefix TRACK
>> >>>>>>
>> >>>>>> router bgp xyz
>> >>>>>> advertise-map ADVERTISE exist-map EXIST
>> >>>>>>
>> >>>>>> HTH
>> >>>>>>
>> >>>>>> Ahmed
>> >>>>>>
>> >>>>>> On Sat, Aug 29, 2009 at 10:57 AM, Sagar Rane <sagar.ccie_at_gmail.com
>> >
>> >>>>>> wrote:
>> >>>>>>
>> >>>>>> > Hi All,
>> >>>>>> >
>> >>>>>> > I have requirement where, bgp should check its bgp routing table
>> for
>> >>>>>> two
>> >>>>>> > routes eq (10.1.1.0/24 and 20.2.2.2/32) and only if both routes
>> are
>> >>>>>> > present,
>> >>>>>> > it should originate a route advertisement of 192.168.10.0/24.
>> >>>>>> >
>> >>>>>> > I have tried advertise-map and exist map, but how can we used
>> >>>>>> exist-map to
>> >>>>>> > check both the routes at the same time?
>> >>>>>> >
>> >>>>>> > Anyway how we can meet this requirement please let me know.
>> >>>>>> >
>> >>>>>> > Regards,
>> >>>>>> > Sagar
>> >>>>>> >
>> >>>>>> >
>> >>>>>> > Blogs and organic groups at http://www.ccie.net
>> >>>>>> >
>> >>>>>> >
>> >>>>>>
>> _______________________________________________________________________
>> >>>>>> > Subscription information may be found at:
>> >>>>>> > http://www.groupstudy.com/list/CCIELab.html
>> >>>>>>
>> >>>>>>
>> >>>>>> Blogs and organic groups at http://www.ccie.net
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> _______________________________________________________________________
>> >>>>>> Subscription information may be found at:
>> >>>>>> http://www.groupstudy.com/list/CCIELab.html
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>
>> >>>>>
>> >>>>> --
>> >>>>>
>> >>>>> Sent from Cochin, KL, India
>> >>>>> Dalton Camp <http://www.quotationspage.com/quote/26252.html> -
>> >>>>> "Politics is made up largely of irrelevancies."
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Sat Aug 29 2009 - 07:46:46 ART