Re: Conditional Advertise

He did list them...

Advertise map with only one matching criteria instead of two.... And
static route tracking. :)

We'd been through them before though. Just not with configs.

*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

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Knowledge is power.

Power corrupts.

Study hard and be Eeeeviiiil......

Divin Mathew John wrote:
> it would be awesome if you could just list out the methods
> (technologies being used)
>
> On Sun, Aug 30, 2009 at 1:11 AM, Narbik Kocharians <narbikk_at_gmail.com
> <mailto:narbikk_at_gmail.com>> wrote:
>
> There are few ways to do this, in the following i am showing you
> just 2 ways:
> Try this, so if netw 1.0.0.0 and 11.0.0.0 are BOTH up, only then,
> network 2.0.0.0 should be advertised:
>
> The topology should be as follows:
> R1 -------- R2 -------- R3
>
> R1 is advertising 1.0.0.0/8 <http://1.0.0.0/8> and 11.0.0.0/8
> <http://11.0.0.0/8>
> R2 is advertising 2.0.0.0/8 <http://2.0.0.0/8>
>
> _*Set up a boolean logic and identify network 1.0.0.0/8
> <http://1.0.0.0/8> and 11.0.0.0/8 <http://11.0.0.0/8>:*_
> R2(config)#Track 1 list boolean *AND
> *R2(config-track)#object 2
> R2(config-track)#object 3
> R2(config-track)#track 2 ip route 1.0.0.0 255.0.0.0 reach
> R2(config-track)#track 3 ip route 11.0.0.0 255.0.0.0 reach
> *_Setup a fake route and tie "Track 1" to the fake route and
> advertise the fake route in BGP:_*
>
> R2(config)#ip route 200.1.1.1 255.255.255.255 null0 *track 1*
>
> R2(config)#router bgp 200
> R2(config-route-map)#Network 200.1.1.1 mask 255.255.255.255
>
> *_Identify network 2.0.0.0/8 <http://2.0.0.0/8> and the fake
> network:_*
>
> R2(config)#ip prefix-list NET permit 200.1.1.1/32
> <http://200.1.1.1/32>
> R2(config)#ip prefix-list NET2 permit 2.0.0.0/8 <http://2.0.0.0/8>
>
> *_Configure a route-map called "Adv" and reference the prefix-list
> that references network 2.0.0.0/8 <http://2.0.0.0/8>:_*
>
> R2(config)#route-map Adv permit 10
> R2(config-route-map)#match ip addr prefix NET2
>
> *_Configure a route-map called "EXIST" and reference the
> prefix-list that references network 200.1.1.1/32
> <http://200.1.1.1/32> (The fake network):_*
>
> R2(config-route-map)#route-map EXIST permit 10
> R2(config-route-map)#match ip addr prefix NET
>
> *_Configure an advertise-map and an exist map:_*
>
> R2(config-route-map)#router bgp 200
> R2(config-router)#neigh 10.1.23.3 advertise-map Adv exist-map EXIST
>
> *_If the first example does not turn you on, then, try this one:_*
>
> same topology as before.
>
> *_On R2_*
>
> *track 1 list boolean and
> object 2
> object 3
> !
> track 2 ip route 1.0.0.0 255.0.0.0 reachability
> track 3 ip route 11.0.0.0 255.0.0.0 reachability*
>
> *Instead of creating a loopback interface and assigning 2.0.0.0/8
> <http://2.0.0.0/8> to it, just create a static route to Null0, as
> long as the static route is there, BGP will advertise it, since
> "Track 1" is referenced by the static route, this network
> (2.0.0.0/8 <http://2.0.0.0/8>) will only be there if the boolean
> logic is true:*
>
> *
> Router bgp 200
> Network 2.0.0.0
>
> *
> *ip route 2.0.0.0 255.0.0.0 Null0 track 1*
>
> *_ _*
>
>
> On Sat, Aug 29, 2009 at 8:25 AM, S Malik <ccie.09_at_gmail.com
> <mailto:ccie.09_at_gmail.com>> wrote:
>
> 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 <mailto: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 <mailto: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......
> >
> >
> > 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 <mailto: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
> <http://www.cisco.com/en/US/docs/ios/12_4t/ip_route/configuration/guide/t_brbext.html#wp1061585>
> >>
> >> On Sat, Aug 29, 2009 at 7:20 PM, S Malik <ccie.09_at_gmail.com
> <mailto: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
> <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
> <http://books.google.com/books?id=-SM1Jeu07UYC&pg=RA1-PA273&lpg=RA1-PA273&dq=r%0Aoute-map+logical+AND&source=bl&ots=w8TcsNnJHf&sig=jvVGIhjeOBFS6njdfBjFzn4cnyY%0A&hl=en&ei=fDGZSs_kAcuf8Qau8uSfBQ&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
> <mailto: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 <mailto: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 <mailto:evil_at_ine.com>
> >>> >>
> >>> >>
> >>> >> Internetwork Expert, Inc.
> >>> >>
> >>> >> http://www.InternetworkExpert.com
> <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
> <mailto: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 <mailto:sagar.ccie_at_gmail.com>>
> >>> <sagar.ccie_at_gmail.com <mailto: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 <http://10.1.1.0/24> and
> 20.2.2.2/32 <http://20.2.2.2/32>) and only if both routes are
> >>> >> present,
> >>> >> it should originate a route advertisement of
> 192.168.10.0/24 <http://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
> <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
> <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
> <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
> <http://www.ccie.net/>
> >>>
> >>>
> _______________________________________________________________________
> >>> Subscription information may be found at:
> >>> http://www.groupstudy.com/list/CCIELab.html
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>
> >>
> >> --
> >>
> >>
> >> 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."
>
>
> Blogs and organic groups at http://www.ccie.net
> <http://www.ccie.net/>
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>
>
>
> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> www.MicronicsTraining.com <http://www.MicronicsTraining.com>
> Sr. Technical Instructor
>
>
>
>
> --
>
> Sent from Cochin, KL, India
> Jeph Jacques <http://www.quotationspage.com/quote/40492.html> -
> "There are two ways to pass a hurdle: leaping over or plowing
> through... There needs to be a ...

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Received on Sat Aug 29 2009 - 19:47:23 ART