From: Andre Riscalla (riscalla@xxxxxxxxxxxxxxxxxxxxxxx)
Date: Wed Jun 05 2002 - 12:51:49 GMT-3
Not really, the requirement to use the "aggregate-address" is that you
have one of its subnet in the BGP routing table. You could very well
advertise an aggregate if you receive a subnet of it from a EBGP peer for
example.
AR-
On Wed, 5 Jun 2002, Nick Shah wrote:
> yes, u r right,
>
> but you need to have *network* command for atleast one matching prefix(in
> order to use aggregate), and the criteria clearly states *not* to use
> network or redistribute command.
>
> rgds
> Nick
> -----Original Message-----
> From: Rajani Deshpande <rajani_desh@yahoo.com>
> To: Nick Shah <nshah@connect.com.au>; Chua, Parry <Parry.Chua@hp.com>;
> McEvoy, Joseph <Joseph.McEvoy@us.didata.com>; David Luu
> <wicked01@ix.netcom.com>; ccielab@groupstudy.com <ccielab@groupstudy.com>
> Date: Wednesday, 5 June 2002 5:03
> Subject: Re: Question: Alternative way of injecting routes into BGP?
>
>
> >This can be achived by aggregate-address command, if
> >he has any 135.3.0.0 route in his bgp routing table.
> >
> >Rajani
> >--- Nick Shah <nshah@connect.com.au> wrote:
> >> agreed..
> >>
> >> but, he states that he wants to advertise his pod's
> >> topology "which is
> >> 135.3.0.0/16" .. so we have to assume his router
> >> knows about some/most/all
> >> of 135.3.0.0/16.
> >>
> >> So, if the native router knows of the /16,
> >> "default-originate" will help..
> >> wont it ??
> >>
> >> rgsd
> >> Nick
> >> ----- Original Message -----
> >> From: "Chua, Parry" <Parry.Chua@hp.com>
> >> To: "Nick Shah" <nshah@connect.com.au>; "McEvoy,
> >> Joseph"
> >> <Joseph.McEvoy@us.didata.com>; "David Luu"
> >> <wicked01@ix.netcom.com>;
> >> <ccielab@groupstudy.com>
> >> Sent: Saturday, June 01, 2002 1:28 PM
> >> Subject: RE: Question: Alternative way of injecting
> >> routes into BGP?
> >>
> >>
> >> > May be I mis-read his requirement, if he want to
> >> advertise 135.3.0.0/16 to
> >> a neighour w/o
> >> > knowing how to reach any subnet of 135.3.0.0/16,
> >> advertise a default route
> >> out is no going to help.
> >> >
> >> > > Parry Chua
> >> > >
> >> > >
> >> >
> >> >
> >> > -----Original Message-----
> >> > From: Nick Shah [mailto:nshah@connect.com.au]
> >> > Sent: Saturday, June 01, 2002 11:23 AM
> >> > To: Chua, Parry; McEvoy, Joseph; David Luu;
> >> ccielab@groupstudy.com
> >> > Subject: Re: Question: Alternative way of
> >> injecting routes into BGP?
> >> >
> >> >
> >> > Parry,
> >> >
> >> > I agree with you but......
> >> >
> >> > If you read Joseph's criteria, it states advertise
> >> a network without using
> >> > NETWORK or REDISTRIBUTE command plus advertise
> >> only to this one peer. This
> >> > would narrow down to advertising a default route
> >> to the neighbor.
> >> >
> >> > If you chose to disagree, pl. advise an alternate
> >> way to satisfy Joseph's
> >> > criteria
> >> >
> >> > rgds
> >> > Nick
> >> > ----- Original Message -----
> >> > From: "Chua, Parry" <Parry.Chua@hp.com>
> >> > To: "Nick Shah" <nshah@connect.com.au>; "McEvoy,
> >> Joseph"
> >> > <Joseph.McEvoy@us.didata.com>; "David Luu"
> >> <wicked01@ix.netcom.com>;
> >> > <ccielab@groupstudy.com>
> >> > Sent: Saturday, June 01, 2002 1:19 PM
> >> > Subject: RE: Question: Alternative way of
> >> injecting routes into BGP?
> >> >
> >> >
> >> > You tell your neigh x.y.z.a that your AS is the
> >> defaut route for their
> >> > network. It sound like
> >> > some information is missing. If you don't even
> >> know such network within
> >> your
> >> > AS, how can you
> >> > advertise and tell other how to reach that
> >> network.
> >> >
> >> > > Parry Chua
> >> > >
> >> > >
> >> >
> >> >
> >> > -----Original Message-----
> >> > From: Nick Shah [mailto:nshah@connect.com.au]
> >> > Sent: Saturday, June 01, 2002 10:49 AM
> >> > To: McEvoy, Joseph; 'David Luu';
> >> ccielab@groupstudy.com
> >> > Subject: Re: Question: Alternative way of
> >> injecting routes into BGP?
> >> >
> >> >
> >> > I could be wrong. but how about...
> >> >
> >> > neighbor x.y.z.a remote-as <<backbone as>>
> >> > neighbor x.y.z.a default-originate
> >> >
> >> > This *could* be a third way of injecting the
> >> *route*. Of course this will
> >> > inject a default route, but it is one method that
> >> satisfies both of your
> >> > criteria (ie. dont use network or redistribute,
> >> dont use static, no other
> >> > ibgp/ebgp peers should know about this route)
> >> >
> >> > What do you think ?
> >> >
> >> > Nick
> >> > ----- Original Message -----
> >> > From: "McEvoy, Joseph"
> >> <Joseph.McEvoy@us.didata.com>
> >> > To: "'David Luu'" <wicked01@ix.netcom.com>;
> >> "McEvoy, Joseph"
> >> > <Joseph.McEvoy@us.didata.com>;
> >> <ccielab@groupstudy.com>
> >> > Sent: Saturday, June 01, 2002 11:58 AM
> >> > Subject: RE: Question: Alternative way of
> >> injecting routes into BGP?
> >> >
> >> >
> >> > > That is not working because I do not have any
> >> subnets of 135.3.0.0 /16
> >> in
> >> > my
> >> > > bgp table. That's because I haven't used any
> >> network or redistribute
> >> > > commands.
> >> > >
> >> > > -----Original Message-----
> >> > > From: David Luu [mailto:wicked01@ix.netcom.com]
> >> > > Sent: Friday, May 31, 2002 9:47 PM
> >> > > To: Joseph McEvoy; ccielab@groupstudy.com
> >> > > Subject: Re: Question: Alternative way of
> >> injecting routes into BGP?
> >> > >
> >> > > aggregate-address 135.3.0.0 255.255.0.0
> >> summary-only
> >> > >
> >> > > At 08:51 PM 5/31/2002 -0400, Joseph McEvoy
> >> wrote:
> >> > > >Hello,
> >> > > >
> >> > > >I know of two ways to get routes injected into
> >> BGP. The first is the
> >> > > network
> >> > > >command, the second is to redistriubute. Does
> >> anybody know of a third
> >> > way?
> >> > > >
> >> > > >I am doing a lab where the directions state
> >> that I need to advertize my
> >> > > pod's
> >> > > >topology 135.3.0.0 /16 to the backbone (in a
> >> different AS) without
> >> using
> >> > > the
> >> > > >redistribute command and without using the
> >> network command. It also
> >> > states
> >> > > >that I can not use any static routes. Lastly it
> >> sates that this route
> >> > > should
> >> > > >not appear on any of the routers in my pod,
> >> just on the backbone. How
> >> in
> >> > > the
> >> > > >world can this be done?
> >> > > >
> >> > > >TIA
> >> > >
> >>
This archive was generated by hypermail 2.1.4 : Tue Jul 02 2002 - 08:12:25 GMT-3