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Re[2]: Class B address routing

  • From: Kenji Anzai
  • Date: Thu May 18 19:54:12 2000

Hi, All.

Thanks to Todd & All of you helped us.
We are really appreciated your help and suggestions.

I think that we can do this now.

Thanks to all again.

Regards,

Kenji Anzai

On Thu, 18 May 2000 19:33:54 -0400 (EDT)
Todd Romero <todd@routeflap.net> wrote:

> 
> easily done..redistribute static into bgp with a route map. one /16 static
> and one /17 static pointing to Null0. the more specific will override the
> /16 always even tho its still there.
> 
> 
> router bgp xxxx
>  redistribute static route-map static-to-bgp
> !
> ip route x.x.x.x 255.255.0.0 Null0 254
> ip route x.x.x.x 255.255.128.0 Null0 254
> !
> access-list 10 permit x.x.x.x 0.0.255.255
> access-list 10 permit x.x.x.x 0.127.255.255
> !
> route-map static-to-bgp permit 10
>  match ip address 10
> !
> 
> 
> the only difference at each pop.. your /17 will be different in the static
> and ACL.
> 
> 
> On Thu, 18 May 2000, Kenji Anzai wrote:
> 
> > 
> > Hi, All.
> > 
> > Thanks for all your replay to help us out.
> > They were really helpful.
> > 
> > However, let me add some mor info for this question.
> > 
> > 1. We have 2 routers at each POP, and own AS number.
> > 2. The routers use EBGP, and use IBGP between the routers at each POP
> > (not between POP).
> > 3. 2 POP are located at different location.
> > 4. We use same data center company's data center, so our network is
> > under the company's network.
> > 5. The data center won't aggrigate our netowrk as /16.
> > 
> > After I read all your response, How could we annouce /16 and /17 from
> > the same router using BGP ?
> > 
> > Regards,
> > 
> > Kenji
> > 
> > 
> > On Thu, 18 May 2000 14:04:15 -0400
> > Kenji Anzai <kenji@itochu.net> wrote:
> > 
> > > 
> > > Hi, All.
> > > 
> > > I'm having problem with our class B address.  Last month, we tested our class B address.  We announce the address as 2 x /17 from 2 different POP under the same ISP's data center.  However, some ISP do NOT accept our route since the address belongs to traditional Class B address, and they told me that they only accept if we announce it as /16. (They filtered out our route…..)
> > > 
> > > I talked to some people, they suggested me that we need to announce the block as /16 from both POP, even though we only like to announce /17 from each POP (Front /17 from one POP, the other /17 from another POP.).
> > > 
> > > How could we do so ?  Please help us.
> > > 
> > > |--------- |
> > > | POP A    |
> > > | /17      |------|
> > > |----------|      |     |--------|
> > >                   |-----| ISP C  |-- Internet---X----ISP D
> > > | ---------|      |     |--------|           Filtered out here…
> > > |  POP B   |------|      
> > > |   /17    |
> > > -----------
> > > 
> > > Regards,
> > > 
> > > Kenji Anzai
> > > 
> > > 
> > > 
> > 
> > 
> > ITIの安齋です。
> > お世話になっております。
> > 
> > 
> > ***携帯電話の番号が変わりました***
> > 
> > ***************************************
> > 
> > Kenji Anzai
> > 
> > Network Engineer
> > 
> > Engineering Department
> > Network Operation Group
> > 
> > Itochu Technology, Inc.
> > 3100 Patrick Henry Drive
> > Santa Clara, CA 94504
> > 
> > Tel:   (408) 653-2817 (Direct)
> > Fax:   (408) 727-4619
> > Cellular: (408) 910-4170
> > Email: kenji@itochu.net
> > Pager:1-888-830-3638
> >         kenji_pager@itochu.net
> >         (English Only)
> > ***************************************
> > 
> 
> 


ITIの安齋です。
お世話になっております。


***携帯電話の番号が変わりました***

***************************************

Kenji Anzai

Network Engineer

Engineering Department
Network Operation Group

Itochu Technology, Inc.
3100 Patrick Henry Drive
Santa Clara, CA 94504

Tel:   (408) 653-2817 (Direct)
Fax:   (408) 727-4619
Cellular: (408) 910-4170
Email: kenji@itochu.net
Pager:1-888-830-3638
        kenji_pager@itochu.net
        (English Only)
***************************************



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