From: Carl Phelan (carlphelan@xxxxxxxxxxx)
Date: Sun Mar 24 2002 - 19:17:13 GMT-3
I have tried this and once the route-map sees the first set metric under
permit 10 it exits and does not proceed on to line 20.
-----Original Message-----
From: Jim Newton [mailto:jnewton@InternetNOC.com]
Sent: 24 March 2002 22:07
To: Carl Phelan; 'Ouellette, Tim'; 'Ahmed Mamoor Amimi'
Cc: ccielab@groupstudy.com
Subject: RE: BGP - Transit Area and now Route-Maps
Can you set the access list in the first part to deny the range that you
want to set the community for, and just set the metric, then in the
second
route map statement allow that range, set the metric and set the
community?
route-map comm&metric permit 10
match ip add x (to deny the routes that you want to set the community
for)
set metric 200
route-map comm&metric permit 20
set metric 200
set community no-export
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Carl
Phelan
Sent: Sunday, March 24, 2002 3:51 PM
To: 'Ouellette, Tim'; 'Ahmed Mamoor Amimi'
Cc: ccielab@groupstudy.com
Subject: RE: BGP - Transit Area and now Route-Maps
Hi,
Many thanks guys for your response to this.
Yes indeed, once I set the 'set community' statement nothing else is
processed and the IOS does not allow more than one 1 route-map statement
out to the same neighbor. So this for example:
route-map comm&metric permit 10
match ip add x
set community no-export
set metric 200
route-map comm&metric permit 20
set metric 200
router bgp 99
neighbor x.x.x.x route-map comm&metric out
does not work. Once the route-map sees 'set community' it exits the
route-map and likewise with set metric. The IOS does not allow 2 route
maps to the same neighbor out so, the question is how should the
route-map be structured to combine both metrics and set community and
run successfully?
Thanks again,
Carl
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Ouellette, Tim
Sent: 24 March 2002 06:15
To: Ouellette, Tim; 'Ahmed Mamoor Amimi'; 'Carl Phelan'
Cc: 'ccielab@groupstudy.com'
Subject: RE: BGP - Transit Area and now Route-Maps
Just as I though, it looks as if once I match is met, that's it. If no
match is met then it continues on until there is no more (implicit deny)
excerpt from the link
When BGP applies MYMAP to routing updates, it applies the lowest
instance
first (in this case, instance 10). If the first set of conditions is not
met, the second instance is applied, and so on, until either a set of
conditions has been met, or there are no more sets of conditions to
apply.
http://www.cisco.com/univercd/cc/td/doc/cisintwk/ics/icsbgp4.htm#xtocid2
0439
8
-----Original Message-----
From: Ouellette, Tim
Sent: Sunday, March 24, 2002 1:10 AM
To: 'Ahmed Mamoor Amimi'; Carl Phelan; Ouellette, Tim
Cc: ccielab@groupstudy.com
Subject: RE: BGP - Transit Area and now Route-Maps
Ahmed,
I believe that you need to watch the order. Obviously in an ACL once
you
match a list than that action is performed (deny/permit) but I believe
that
a route-map would be the same. So in your example, all routes incoming
will
match your sequence #10, since you have no match statement means match
all,
then you'll set the no-export and that's it. I don't think it'll go onto
the
next instance. I'll have to read up but i think that's the way it works.
I
think what you might want to do is like this.
route-map comm&metric permit 10
match ip add x
set community no-export
set metric 200
route-map comm&metric permit 20
set metric 200
router bgp 99
neighbor x.x.x.x route-map comm&metric out
-----Original Message-----
From: Ahmed Mamoor Amimi [mailto:mamoor@ieee.org]
Sent: Sunday, March 24, 2002 12:59 AM
To: Carl Phelan; 'Ouellette, Tim'
Cc: ccielab@groupstudy.com
Subject: Re: BGP - Transit Area and now Route-Maps
Can u try this one.
This will put the community "no-export" to every route
R1
router-map comm&metric-set permit 10
set community no-export
router-map comm&metric-set permit 20
match ip add x
set metric 200
router-map comm&metric-set permit 30
set metric 200
Router bgp 99
....
Neighbor 10.1.1.1 route-map comm&metric-set out
let me know what is the result
-Mamoor
----- Original Message -----
From: Carl Phelan <carlphelan@hotmail.com>
To: 'Ouellette, Tim' <tim.ouellette@eds.com>
Cc: <ccielab@groupstudy.com>
Sent: Sunday, March 24, 2002 6:36 AM
Subject: RE: BGP - Transit Area and now Route-Maps
> Thanks Tim for the reply. I have a weird problem with BGP. I cannot
> seem to create 2 neighbor statements with route-maps as when I enter
the
> second neighbor statement; the first disappears from the config.
>
> Here is my set up:
>
> R1
> Route-map set-comm perm 10
> Set community no-export
>
> Route-map metric-set perm 10
> Match ip ad x
> Set metric 200
> ..
> Route-map metric-set perm 20
> Set metric 300
> ..
> Router bgp 99
> ....
> Neighbor 10.1.1.1 route-map set-comm out
> Neighbor 10.1.1.1 route-map metric-set out
>
> But when I look at the config only the last neighbor statement
remains,
> if I add the missing neighbor statement again; the existing neighbor
> statement disappears! The same problem happens on another router but
> has the additional neighbor statement:
>
> Neighbor 11.1.1.1 route-map set-weight in
> ..
> Route-map set-weight perm 10
> Set weight 1000
>
> Which stays.
>
>
> I have even tried adding a line 5 in set-metric to add 'set community
> no-export' to join both route-maps into one but the external AS
ignores
> the metric statements. I am running IOS 12.0(10)
>
> What gives? All advice would be extremely appreciated!
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Ouellette, Tim
> Sent: 24 March 2002 00:39
> To: 'Carl Phelan'
> Cc: 'ccielab@groupstudy.com'
> Subject: RE: BGP - Transit Area
>
> Try setting a community of no-export on routes incoming from both of
> your
> ebgp peers. Obviously if your concerned about being non-transit then
you
> have multiple connections to the "outside world" with multiple
> providers.
>
> If anyone else has other ways please respond!
>
> Tim
>
>
> -----Original Message-----
> From: Carl Phelan [mailto:carlphelan@hotmail.com]
> Sent: Saturday, March 23, 2002 12:00 PM
> To: ccielab@groupstudy.com
> Subject: BGP - Transit Area
>
>
> Hi All,
>
> I am practising doing normal tasks in different ways - as expected for
> the lab. In BGP, what is the simplest way to make an area a
non-transit
> area without using an AS path filter?
>
> Many thanks for any advice.
>
> Carl
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