[isp-bgp] Re: Prefer BGP default route over OSPF.

[James <haesu@...>]

> 
> No - Make the default routes received from our upstreams (Via BGP), a higher 
> precendence than OSPF default route.

Ok, then... do.. nothing. :)

Check your routes, it should look like this on 0.0.0.0/0 unless something had
been changed/customized on your rtr:

*  B 0.0.0.0/0 [20/0] via blah, XwYd
   O 0.0.0.0/0 [110/0] via bleh, XwYd

Look at the [20/NUMBER] and [110/NUMBER]. The first number before the slash
is the administrative distance. Lower administrative distance wins over
higher distance.

So if you are using default configuration, EBGP has lower admin dist than OSPF,
thus, 0.0.0.0/0 received from BGP will be elected for FIB selection.

-J
-- 
James Jun                                            TowardEX Technologies, Inc.
Technical Lead                        Network Design, Consulting, IT Outsourcing
james@...                  Boston-based Colocation & Bandwidth Services
cell: 1(978)-394-2867           web: http://www.towardex.com , noc: www.twdx.net

> 
> 
> > 
> > -J
> > 
> > On Thu, May 20, 2004 at 07:48:31AM +1000, mb@....au wrote:
> > > Quoting James <haesu@...>:
> > > 
> > > > if it is eBGP based default route, by default configuration, ospf will
> > not
> > > > get preferred.
> > > > 
> > > > Administrative Distances (Lower number wins)
> > > > ------------------------
> > > > CONNECTED = 0
> > > > STATCON = 0
> > > > STATIC = 1
> > > > EIGRP SUM = 5
> > > > EBGP = 20
> > > > EIGRP INT = 90
> > > > IGRP = 100
> > > > OSPF = 110
> > > > ISIS = 115
> > > > RIP  = 120
> > > > EGP = 140
> > > > EIGRP EXTN = 170
> > > > IBGP = 200
> > > > UNKNOWN = 255
> > > 
> > > Thanks James,
> > > 
> > > I came to the same conclusion - Is there anyway to overide this?
> > > 
> > > Regards,
> > > MB
> > > 
> > > 
> > > 
> > > -------------------------------------------------------------------------
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> > > 
> > > 
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> > -- 
> > James Jun                                            TowardEX Technologies,
> > Inc.
> > Technical Lead                        Network Design, Consulting, IT
> > Outsourcing
> > james@...                  Boston-based Colocation & Bandwidth
> > Services
> > cell: 1(978)-394-2867           web: http://www.towardex.com , noc:
> > www.twdx.net
> > 
> > 




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> 
> 
> -------------------------------------------------------------------------
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