From: Kevin Young (kvyoung@xxxxxxxx)
Date: Wed May 10 2000 - 10:01:01 GMT-3
yes, i agree with you.
----- Original Message -----
From: John Conzone <jkconzone@home.com>
To: Kevin Young <kvyoung@sina.com>
Cc: ccielab <ccielab@groupstudy.com>
Sent: Wednesday, May 10, 2000 8:12 PM
Subject: Re: OSPF route filtering on ABRs...now I'm confused(again)
> So, same PID, send LSA's, ditribute list has no effect on LSA, just
> routes.
> Different PID's, routes are exchanged, not LSA's, so OSPF 10 thinks OSPF
> 20 is another protocol, sends routes, and distribute list work? Does
> thatmean OSPF 10 and OSPF 20 don't see each others LSA's?
> Hmmmmmmmmm. I will most defintely read up on that!
>
> ----- Original Message -----
> From: "Kevin Young" <kvyoung@sina.com>
> To: "John Conzone" <jkconzone@home.com>
> Cc: "ccielab" <ccielab@groupstudy.com>
> Sent: Wednesday, May 10, 2000 7:53 AM
> Subject: Re: OSPF route filtering on ABRs...now I'm confused(again)
>
>
> > yeah, ospf recognize the different pid's in the same AS and allows you to
> filter.
> >
> > Routing TCP/IP Volume1 p771-780 has wonderful description.
> > when use distribute-list xx out interface is meaningless under link state
> protocol because LS doesn't advertise route to its neghbor but LSAs, route
> filters have no effect on LSAs. but distribute-list xx out protocol done, it
> means allow ospf to advertise routes which discovered by other protocol .
> >
> >
> >
> > **************************************
> > Kevin Young
> > Senior Network Engineer
> > Yinxi Electronic Information Co.,Ltd
> > (86)-10-82625798 x 810
> > **************************************
> >
> > ----- Original Message -----
> > From: John Conzone <jkconzone@home.com>
> > To: Goh, Winston <winston.goh@sg.unisys.com>; 'Kevin Young'
> <kvyoung@sina.com>; <ccielab@groupstudy.com>
> > Sent: Wednesday, May 10, 2000 7:35 PM
> > Subject: Re: OSPF route filtering on ABRs...now I'm confused(again)
> >
> >
> > > Okay, now I'm confused.
> > > Reading Caslow last night said the OSPF process-id was only locally
> > > significant. I took that to mean that as long as you had OSPF routers
> > > touching the same area 0 they were in the same AS, regardless of process
> ID
> > > number.
> > > To have a seperate OSPF AS, you'd need another routing protocol
> > > isolating them, say BGP. That was my take, anyway. I didin't know you
> could
> > > filter routes bewteen routers in the same AS, regardless of pid.
> > > OSPF recognize the different pid's in the same AS and allows you to
> > > filter?
> > > Winston, please explain "during redistribution, distribution-list
> will
> > > filter the route since routes are injected into the opsf but not the
> > > link-states"
> > > Has anyone actually tried this?
> > > Thanks.
> > >
> > >
> > >
> > > John
> > >
> > > ----- Original Message -----
> > > From: "Goh, Winston" <winston.goh@sg.unisys.com>
> > > To: "'Kevin Young'" <kvyoung@sina.com>; <ccielab@groupstudy.com>
> > > Sent: Wednesday, May 10, 2000 6:40 AM
> > > Subject: RE: OSPF route filtering on ABRs...
> > >
> > >
> > > > Hi,
> > > > i think Mohan is not running 2 ospf process. if you are running 2 ospf
> > > > process, of course , during redistribution, distribution-list will
> filter
> > > > the route since routes are injected into the opsf but not the
> link-states.
> > > I
> > > > think the solution is to configure area 1 as stub. cheers
> > > >
> > > > Winston Goh
> > > > CCNP, CVE
> > > > Snr Network Specialist
> > > > Unisys Singapore
> > > > mobile : 97469192
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: Kevin Young [mailto:kvyoung@sina.com]
> > > > Sent: Wednesday, May 10, 2000 6:18 PM
> > > > To: Goh, Winston
> > > > Cc: ccielab
> > > > Subject: Re: OSPF route filtering on ABRs...
> > > >
> > > >
> > > > Hi , you could do it!
> > > >
> > > >
> > > > r1e0-----e0r2e1-----e0r3
> > > > area0 area1
> > > >
> > > > you must config r2 two ospf routing process such as 10 and 20,
> > > > put r2e0 with area0 in process 10, and put r2e1 with area1 in process
> 20,
> > > > do this:
> > > > router ospf 20
> > > > netowork x.x.x.x x.x.x.x area 1
> > > > redistribute ospf 10 subnets
> > > > distribute-list 1 out ospf 10
> > > >
> > > > access-list 1 permit x.x.x.x (which u want to propagate in
> area
> > > 1)
> > > >
> > > >
> > > >
> > > > **************************************
> > > > Kevin Young
> > > > Senior Network Engineer
> > > > Yinxi Electronic Information Co.,Ltd
> > > > (86)-10-82625798 x 810
> > > > **************************************
> > > >
> > > > ----- Original Message -----
> > > > From: Goh, Winston <winston.goh@sg.unisys.com>
> > > > To: 'Kevin Young' <kvyoung@sina.com>; Muthu Mohanasundaram
> > > > <mmsundar@yahoo.com>
> > > > Cc: ccielab <ccielab@groupstudy.com>
> > > > Sent: Wednesday, May 10, 2000 9:54 AM
> > > > Subject: RE: OSPF route filtering on ABRs...
> > > >
> > > >
> > > > > hi,
> > > > > since ospf is a link-state protocol, using distribue-list out ospf
> is
> > > > rather
> > > > > useless because ospf does not propagate routing table out its
> interface
> > > > but
> > > > > link states. Therefore, downstream routers will still receive the
> link
> > > > > states and generate the routes. cheers
> > > > >
> > > > > Winston Goh
> > > > > CCNP, CVE
> > > > > Snr Network Specialist
> > > > > Unisys Singapore
> > > > > mobile : 97469192
> > > > >
> > > > >
> > > > > -----Original Message-----
> > > > > From: Kevin Young [mailto:kvyoung@sina.com]
> > > > > Sent: Tuesday, May 09, 2000 11:53 AM
> > > > > To: Muthu Mohanasundaram
> > > > > Cc: ccielab
> > > > > Subject: Re: OSPF route filtering on ABRs...
> > > > >
> > > > >
> > > > > Hi,
> > > > > I think if you want to filter all of the routes from area 0 into
> the
> > > > > area1 ,
> > > > > you could config the ABR a totally-stubby area;
> > > > > I couldn't be sure that you may use distribute-list xxx out ospf
> xxx
> > > > > to filter partial toutes from area 0 into area 1, if you get answer,
> pls
> > > > > tell me.
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: Muthu Mohanasundaram <mmsundar@yahoo.com>
> > > > > To: <ccielab@groupstudy.com>
> > > > > Sent: Tuesday, May 09, 2000 10:09 AM
> > > > > Subject: OSPF route filtering on ABRs...
> > > > >
> > > > >
> > > > > > Hi,
> > > > > >
> > > > > > I have an ABR connecting 2 areas, say Area 0 and Area
> > > > > > 1. Can I filter some or all of the routes from Area 0
> > > > > > from entering Area 1.
> > > > > >
> > > > > > That is, can I filter routes while they are being
> > > > > > passed between areas?
> > > > > >
> > > > > > Any ideas....
> > > > > >
> > > > > > Thanks,
> > > > > >
> > > > > > Mohan.
> > > > > >
> > > > > >
> > > > > >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:23:28 GMT-3