From: GAURAV MADAN (gauravmadan1177@gmail.com)
Date: Tue Aug 26 2008 - 05:35:41 ART
HI
AS 100 will not come in picture .
Lemme clearify as far as i Know ....
You have used
[A] as-set
[B] advertise-set..
by using as-set .. you are actually saying that the constituent route's
AS-number will be advertised ..
for example .. if constituent routes are from as 1 ,as 2 ,as 3 .. then
the summary route will show as 1 ,2,3 ..
by using advertise-set ; you mean that only constituent routes that
match ^300 in your case which will make AS-SET attribute .
HTH
Gaurav Madan
On Tue, Aug 26, 2008 at 10:44 AM, Roger Oliver
<divineone@divine-wind.net> wrote:
> Hello!
> Okay simple clarification / confirmation
>
>
> R1 (AS100) <----> R2 (AS200) <---> R3 (AS300)
>
> R1
> lo0
> 3.1.11.0/24
>
> R2
> N/A
>
> R3
> lo0-13
> 3.1.1-14.0/24 (Skips 3.1.11.0/24)
>
> R2 Aggregate's the address to a /20 to R1 and R3 however applies an
> advertise-map (below
>
> router bgp 200
> aggregate-address 3.1.0.0 255.255.240.0 as-set summary-only
> advertise-map ADVMAP
> !
> ip as-path access-list 1 permit ^300
> !
> route-map ADV permit 10
> match as-path 1
>
> To me this means that R2 will send the aggregate to R1 but remove the
> AS100 tag from the aggregate? and only show the AS300 and AS200 tag? I
> did the reverse to check and it seems right just want any thoughts on
> it.
>
> Thanks!
> Roger
>
>
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