Re: Conditional Advertise

Scott,
I already thought of using sla tracking, some how it does not seem to be
fitting in it.

Only as-path is the option that I could match after a prefix list under the
same clause and I think even this as-path should be the associated attribute
of the prefix we matched earlier.

On Sat, Aug 29, 2009 at 10:39 AM, Scott Morris <smorris_at_ine.com> wrote:

> No, they'd all be or, or, or, or....
>
> If you have the ability (likely not in CCIE) to use a static route, you can
> put a track condition on it. With the tracking mechanisms, we have much
> more boolean control on and, or, not, etc. But not in a route-map! Bummer
> there.
>
>
>
>
> *Scott Morris*, CCIE*x4* (R&S/ISP-Dial/Security/Service Provider) #4713,
>
> JNCIE-M #153, JNCIS-ER, CISSP, et al.
>
> JNCI-M, JNCI-ER
>
> evil_at_ine.com
>
>
> Internetwork Expert, Inc.
>
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>
> Divin Mathew John wrote:
>
> From wht Malik Qoouted..
> route-map ABC permit 10
> match ip add prefi P Q R
> match Ip add prefix XYZ
>
>
> means
>
> if((P OR Q OR R) AND (X OR Y OR Z)
> then exceute SET
>
> On Sat, Aug 29, 2009 at 7:26 PM, Divin Mathew John
<divinjohn_at_gmail.com>wrote:
>
>> For this u gotta use the CONTINUE Clause in route-maps
>>
>> Filtering Traffic Using Continue Clauses in a BGP Route Map
>>
>> Perform this task to filter traffic using continue clauses in a BGP route
>> map. In Cisco IOS Release 12.3(2)T, 12.0(24)S, 12.2(33)SRB, and later
>> releases, the continue clause was introduced into BGP route map
>> configuration. The continue clause allows for more programmable policy
>> configuration and route filtering and introduced the capability to execute
>> additional entries in a route map after an entry is executed with
successful
>> match and set clauses. Continue clauses allow the network operator to
>> configure and organize more modular policy definitions so that specific
>> policy configurations need not be repeated within the same route map.
Before
>> the continue clause was introduced, route map configuration was linear and
>> did not allow any control over the flow of a route map.
>>
>> In Cisco IOS Release 12.0(31)S, 12.4(4)T, 12.2(33)SRB, and later releases,
>> support for continue clauses for outbound route maps was introduced.
>> Route Map Operation Without Continue Clauses
>>
>> A route map evaluates match clauses until a successful match occurs. After
>> the match occurs, the route map stops evaluating match clauses and starts
>> executing set clauses, in the order in which they were configured. If a
>> successful match does not occur, the route map "falls through" and
evaluates
>> the next sequence number of the route map until all configured route map
>> entries have been evaluated or a successful match occurs. Each route map
>> sequence is tagged with a sequence number to identify the entry. Route map
>> entries are evaluated in order starting with the lowest sequence number
and
>> ending with the highest sequence number. If the route map contains only
set
>> clauses, the set clauses will be executed automatically, and the route map
>> will not evaluate any other route map entries.
>> Route Map Operation with Continue Clauses
>>
>> When a continue clause is configured, the route map will continue to
>> evaluate and execute match clauses in the specified route map entry after
a
>> successful match occurs. The continue clause can be configured to go to
(or
>> jump to) a specific route map entry by specifying the sequence number, or
if
>> a sequence number is not specified, the continue clause will go to the
next
>> sequence number. This behavior is called an "implied continue." If a match
>> clause exists, the continue clause is executed only if a match occurs. If
no
>> successful matches occur, the continue clause is ignored.
>> Match Operations with Continue Clauses
>>
>> If a match clause does not exist in the route map entry but a continue
>> clause does, the continue clause will be automatically executed and go to
>> the specified route map entry. If a match clause exists in a route map
>> entry, the continue clause is executed only when a successful match
occurs.
>> When a successful match occurs and a continue clause exists, the route map
>> executes the set clauses and then goes to the specified route map entry.
If
>> the next route map entry contains a continue clause, the route map will
>> execute the continue clause if a successful match occurs. If a continue
>> clause does not exist in the next route map entry, the route map will be
>> evaluated normally. If a continue clause exists in the next route map
entry
>> but a match does not occur, the route map will not continue and will "fall
>> through" to the next sequence number if one exists.
>> Set Operations with Continue Clauses
>>
>> Set clauses are saved during the match clause evaluation process and
>> executed after the route-map evaluation is completed. The set clauses are
>> evaluated and executed in the order in which they were configured. Set
>> clauses are executed only after a successful match occurs, unless the
route
>> map does not contain a match clause. The continue statement proceeds to
the
>> specified route map entry only after configured set actions are performed.
>> If a set action occurs in the first route map and then the same set action
>> occurs again, with a different value, in a subsequent route map entry, the
>> last set action may override any previous set actions that were configured
>> with the same set command unless the set command permits more than one
>> value. For example, the set as-path prepend command permits more than one
>> autonomous system number to be configured.
>>
>>
>>
http://www.cisco.com/en/US/docs/ios/12_4t/ip_route/configuration/guide/t_brbe
xt.html#wp1061585
>>
>> On Sat, Aug 29, 2009 at 7:20 PM, S Malik <ccie.09_at_gmail.com> wrote:
>>
>>> Natraajan,
>>> you are correct, ACL & Prefix-list under same clause don't go together.
>>> Please see following link quoting example and I wrongly understood AND/OR
>>> logic from there,
>>>
>>>
>>>
http://books.google.com/books?id=-SM1Jeu07UYC&pg=RA1-PA273&lpg=RA1-PA273&dq=r
>>>
>>>
oute-map+logical+AND&source=bl&ots=w8TcsNnJHf&sig=jvVGIhjeOBFS6njdfBjFzn4cnyY
>>>
>>>
&hl=en&ei=fDGZSs_kAcuf8Qau8uSfBQ&sa=X&oi=book_result&ct=result&resnum=2#v=one
>>>
page&q=route-map%20logical%20AND&f=false<http://books.google.com/books?id=-SM
1Jeu07UYC&pg=RA1-PA273&lpg=RA1-PA273&dq=r%0Aoute-map+logical+AND&source=bl&ot
s=w8TcsNnJHf&sig=jvVGIhjeOBFS6njdfBjFzn4cnyY%0A&hl=en&ei=fDGZSs_kAcuf8Qau8uSf
BQ&sa=X&oi=book_result&ct=result&resnum=2#v=one%0Apage&q=route-map%20logical%
20AND&f=false>
>>>
>>>
>>> On Sat, Aug 29, 2009 at 9:28 AM, Anantha Subramanian Natarajan <
>>> anantha.natarajan_at_gravitant.com> wrote:
>>>
>>> > Hi Scott,
>>> >
>>> > If I understand properly from you ,I tried that,it give an error
>>> > mentioning u can't use the prefix-list and access-list on the same
>>> route-map
>>> > sequence as below
>>> >
>>> > *"% prefix-list and access-list can not co-exist in one route-map
>>> > sequence"*
>>> >
>>> > Thanks
>>> >
>>> > Regards
>>> > Anantha Subramanian Natraajan
>>> >
>>> > On Sat, Aug 29, 2009 at 8:25 AM, Scott Morris <smorris_at_ine.com>
>>> wrote:
>>> >
>>> >> If they're the same TYPE (e.g. two ACLs) then the router will redo
>>> things
>>> >> for you onto the same line, making the logic an OR. Kind of obnoxious
>>> if
>>> >> you ask me. :)
>>> >>
>>> >> But if you do two DIFFERENT things (e.g. one prefix list and one ACL)
>>> you
>>> >> can have the AND logic working.
>>> >>
>>> >>
>>> >>
>>> >>
>>> >> *Scott Morris*, CCIE*x4* (R&S/ISP-Dial/Security/Service Provider)
>>> #4713,
>>> >>
>>> >> JNCIE-M #153, JNCIS-ER, CISSP, et al.
>>> >>
>>> >> JNCI-M, JNCI-ER
>>> >>
>>> >> evil_at_ine.com
>>> >>
>>> >>
>>> >> Internetwork Expert, Inc.
>>> >>
>>> >> http://www.InternetworkExpert.com<http://www.internetworkexpert.com/><
>>> http://www.internetworkexpert.com/>
>>> >>
>>> >> Toll Free: 877-224-8987
>>> >>
>>> >> Outside US: 775-826-4344
>>> >>
>>> >>
>>> >> Knowledge is power.
>>> >>
>>> >> Power corrupts.
>>> >>
>>> >> Study hard and be Eeeeviiiil......
>>> >>
>>> >>
>>> >>
>>> >>
>>> >> S Malik wrote:
>>> >>
>>> >> One thing is sure that same line is O, when we assign two ACL under
>>> one
>>> >> clause, it is shown in one line and treated as OR.
>>> >>
>>> >> On Sat, Aug 29, 2009 at 7:53 AM, Anantha Subramanian Natarajan
>>> <anantha.natarajan_at_gravitant.com> wrote:
>>> >>
>>> >>
>>> >>
>>> >> Hi Sugar Can,
>>> >>
>>> >> Can you try inside the route-map as below
>>> >>
>>> >> Match ip address prefix-list <prefix-list1><prefix-list2>
>>> >>
>>> >> I think whenever we specify the match criteria on same line ,it is an
>>> AND
>>> >> operation
>>> >>
>>> >> Regards
>>> >> Anantha Subramanian Natarajan
>>> >>
>>> >> On Sat, Aug 29, 2009 at 12:57 AM, Sagar Rane <sagar.ccie_at_gmail.com>
>>> <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
>>> >>
>>> >>
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>>>
>>
>>
>> --
>>
>>
>> Anatole France <http://www.quotationspage.com/quote/27546.html> - "If
>> fifty million people say a foolish thing, it is still a foolish thing."
>
>
>
>
> --
>
> Sent from Cochin, KL, India
> Rodney Dangerfield <http://www.quotationspage.com/quote/34016.html> - "I
> went to a fight the other night, and a hockey game broke out."

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Received on Sat Aug 29 2009 - 11:25:39 ART