From: uyota oyearone (spycharlies@hotmail.com)
Date: Wed Aug 09 2006 - 02:38:51 ART
I think i got the logic,
"no-export means" , when the neighbors gets these network, they can
advertise it to peers within thesame AS but not outside their AS.
While "No-advertise" means, telling your neighbor not to advertise these
network out to anybody within or outside their AS.
--------------------------------------------------------------------
From: spycharlies@hotmail.com
Reply-To: spycharlies@hotmail.com
To: ccielab@groupstudy.com
Subject: BGP Well-know Community
Date: Wed, 9 Aug 2006 01:06:57 -0400
>Hey Guys,
>
>I think i might be mixing these 2 communities up. ("no-advertise" &
"no-export")
>
>
>B4 now, i'd always thought "no-advertise" is used within thesame AS,
while
>"no-export" is used btw different AS.
>
>But i was doing some config lately, and i noticed both communities
does thesame funtion.
>
>===================================================================
>r1(as100) peers with r2(as200), while r2 peers with r3(as300)
>
>My goal was to advertise network((192.10.100.x/24) on r1. This
network is
>passed onto r2 via BGP, but r2 shld'nt pass it on to r3.
>
>r1#
>ip as-path access-list 1 permit ^$
>!
>route-map [N0_EXPORT][NO_ADVERTISE] permit 10
> match as-path 1
> set community [no-export][no-advertise]
>!
>route-map [N0_EXPORT][NO_ADVERTISE] permit 1000
>!
>router bgp 100
>..network 192.10.100.0 mask 255.255.255.0
>..neighbor 192.10.123.2 remote 200
>..neighbor 192.10.123.2 send-community
>..neighbor 192.10.123.2 route-map [N0_EXPORT][NO_ADVERTISE] out
>
>
>My question is, are there situations where u would wanna use
>no-export instead of no-advertise or vise-versa??
>
>cheers
>
>Uyota
>
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