From: info@mpauli.de
Date: Sun Sep 28 2003 - 11:20:17 GMT-3
Hi Jonathan,
you're right concerning the def. weight. But if the default is in effect, it is not displayed with sh ip bgp. The point was, to demonstrate, that after a permit in a route-map, it is checked against the other entrys. (Your point 2).
Anyway, I've just changed the route-map:
R2#sh ip bgp
BGP table version is 20, local router ID is 133.1.2.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i1.1.1.0/24 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i2.2.2.0/24 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i3.3.3.0/24 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i4.4.4.0/24 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i5.5.5.0/24 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i6.6.6.0/24 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i10.10.1.0/24 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i133.1.253.0/24 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i144.10.13.0/24 133.1.3.3 444 100 0 5001 i
* i144.10.31.0/24 133.1.3.3 444 100 0 5001 i
Network Next Hop Metric LocPrf Weight Path
* i144.10.35.0/24 133.1.3.3 444 100 0 5001 i
*>i144.10.111.0/24 133.1.3.3 444 100 0 5001 i
*>i150.100.1.0/24 133.1.3.3 444 100 0 5001 i
*>i192.168.161.0 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i192.168.167.0 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i192.168.170.0 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i197.65.7.0 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i198.199.199.0 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i199.199.198.0 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i199.199.199.0 133.1.3.3 300 100 0 5001 65001 253 99 100 i
*>i201.201.201.0 133.1.3.3 444 100 0 5001 i
Q.E.D. ;-)
Cheers
Marcus
-------- Original Message --------
Subject: RE: Re-2: Route-Map Logic (Example from networkers 2000) (28-Sep-2003 16:12)
From: jhays@jtan.com
To: info@mpauli.de
> I see some flaws in this test.
>
> 1. You are setting local preference to the default, which is 100. So it
> is not easy to tell if the route-map has actually done anything. You
> would do better to use a non-default value, such as 111.
>
> 2. Please note that each route is filtered by the route-map
> individually. If there are 10 routes, then the route-map is executed 10
> times. So one route might match on permit 10 while the next route
> matches on permit 20.
>
> To verify that the route-map is exiting on the first match for a given
> route, a better test might be this:
>
> route-map bla01 permit 10
> match as-path 10
> set metric 300
> !
> route-map bla01 permit 20
> match as-path 10
> set metric 444
>
> If the route-map does NOT exit after permit 10 has set the metric to
> 300, then the final metric will be 444.
>
> HTH,
>
> Jonathan
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> info@mpauli.de
> Sent: Sunday, September 28, 2003 8:40 AM
> To: Ken.Farrington@barclayscapital.com
> Cc: ccielab@groupstudy.com
> Subject: Re-2: Route-Map Logic (Example from networkers 2000)
>
>
> Hi Ken,
>
> I've just tested it myself:
> Originating router:
>
> router bgp 1
> bgp router-id 133.1.5.5
> bgp log-neighbor-changes
> neighbor 133.1.2.2 remote-as 1
> neighbor 133.1.2.2 update-source Loopback0
> neighbor 133.1.2.2 route-reflector-client
> neighbor 133.1.2.2 route-map bla01 out
> neighbor 133.1.3.3 remote-as 5001
> neighbor 133.1.3.3 ebgp-multihop 2
> neighbor 133.1.3.3 update-source Loopback0
> neighbor 133.1.6.6 remote-as 1
> neighbor 133.1.6.6 update-source Loopback0
> neighbor 133.1.6.6 route-reflector-client
> !
> ip as-path access-list 10 permit 99
> ip as-path access-list 20 permit ^5001
> !
> !
> route-map bla01 permit 10
> match as-path 10
> set metric 300
> !
> route-map bla01 permit 20
> match as-path 20
> set local-preference 100
>
> The outcome on the destination router looks like this:
>
> R2#sh ip bgp
> BGP table version is 21, local router ID is 133.1.2.2
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *>i1.1.1.0/24 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i2.2.2.0/24 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i3.3.3.0/24 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i4.4.4.0/24 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i5.5.5.0/24 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i6.6.6.0/24 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i10.10.1.0/24 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i133.1.253.0/24 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i144.10.13.0/24 133.1.3.3 100 0 5001 i
> * i144.10.31.0/24 133.1.3.3 100 0 5001 i
> Network Next Hop Metric LocPrf Weight Path
> *>i144.10.35.0/24 133.1.3.3 100 0 5001 i
> *>i144.10.111.0/24 133.1.3.3 100 0 5001 i
> *>i150.100.1.0/24 133.1.3.3 100 0 5001 i
> *>i192.168.161.0 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i192.168.167.0 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i192.168.170.0 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i197.65.7.0 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i198.199.199.0 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i199.199.198.0 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i199.199.199.0 133.1.3.3 300 100 0 5001 65001
> 253 99 100 i
> *>i201.201.201.0 133.1.3.3 100 0 5001 i
>
> Thus, the process was running through both route-maps. As per your
> statement, it should only be the MED of 300 for all prefixes containing
> AS 99...
>
> Hope I could help.
>
> Cheers
> Marcus
>
>
> -------- Original Message --------
> Subject: RE: Route-Map Logic (Example from networkers 2000) (28-Sep-2003
> 14:12)
> From: Ken.Farrington@barclayscapital.com
> To: navaid@rogers.com
>
> > Yes, they are for different routes.
> >
> > I am just confused then, on how the route-maps work, so, if you set
> an
> > attrib on prefix A, lets say, then you cant do anything else with a
> route
> > map to that prefix?
> >
> > ? Im sure there are some "route-map Kings" on this list somewhere?
> >
> > Many thx for the input Navaid :)
> >
> >
> > -----Original Message-----
> > From: navaid@rogers.com [mailto:navaid@rogers.com]
> > Sent: 28 September 2003 12:55
> > To: Ken.Farrington@barclayscapital.com; ccielab@groupstudy.com
> > Cc: kenfarrington@yahoo.com
> > Subject: Re: Route-Map Logic (Example from networkers 2000)
> >
> >
> > Ken,
> > Are you setting community attribute and next-hop for same route.
> > If it is for different routes. I think it will work because route-map
> is
> > applied for each route one by one.
> >
> > Navaid.
> >
> >
> > >
> > > From: Ken.Farrington@barclayscapital.com
> > > Date: 2003/09/28 Sun AM 06:54:05 EDT
> > > To: ccielab@groupstudy.com
> > > CC: kenfarrington@yahoo.com
> > > Subject: Route-Map Logic (Example from networkers 2000)
> > >
> > > All,
> > >
> > > I am a little confused about the route-map logic that Cisco use.
> > > In their example from networkers 2000, they say (note the first line
> in
> > the
> > > table)
> > > that if in your route-map, you have a hit on a permit and set an
> > attribute,
> > > the
> > > route-map will exit?
> > >
> > > +--------------------------------------------------------------+
> > > | ROUTE-MAP | MATCH CLAUSE/ | ACCEPT ROUTE and | EXIT |
> > > | STANZA | PREFIX-LIST | SET ATTRIBUTE | ROUTE-MAP |
> > > +-----------+-----------------+--------------------+-----------+
> > > | Permit | Yes/Permit | Yes | Yes |
> > > | | | | |
> > > | Permit | No/Deny | No | No |
> > > | | | | |
> > > | Deny | Yes/Permit | No | Yes |
> > > | | | | |
> > > | Deny | No/Deny | No | No |
> > > +-----------+-----------------+--------------------+-----------+
> > >
> > >
> > >
> > > So I have a route map doing two things for BGP.
> > > 1. Setting the next-hop attrib
> > > 2. Setting the community
> > >
> > > But my route map does not exit after the first hit (permit 10) to
> set the
> > > next hop.
> > > It does continue to go onto 20 and set my community.
> > >
> > > Can someone please clarify this for me.
> > >
> > > ****Will it always go onto the next route-map statment if there is
> one?
> > ****
> > >
> > >
> > >
> > > !
> > > ip prefix-list BGP-COMM-LIST seq 5 permit 1.1.1.0/24
> > > ip prefix-list BGP-COMM-LIST seq 10 permit 2.2.2.0/24
> > > !
> > > ip prefix-list BGP-SNH-LIST seq 5 permit 3.3.3.3/32
> > > ip prefix-list BGP-SNH-LIST seq 10 permit 4.4.4.4/32
> > > !
> > > !
> > > route-map BGP-ATTRIB permit 10
> > > match ip address prefix-list BGP-SNH-LIST
> > > set ip next-hop 142.220.10.1
> > > !
> > > route-map BGP-ATTRIB permit 20
> > > match ip address prefix-list BGP-COMM-LIST
> > > set community local-AS
> > > !
> > > route-map BGP-ATTRIB permit 30
> > > !
> > >
> > >
> > >
> > >
> ------------------------------------------------------------------------
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> To: Ken.Farrington@barclayscapital.com
> Cc: ccielab@groupstudy.com
>
> ***Get your CCIE and a FREE vacation: Shop.GroupStudy.com***
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To: jhays@jtan.com
Ken.Farrington@barclayscapital.com
Cc: ccielab@groupstudy.com
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