From: Jonathan Hays (jhays@xxxxxxxx)
Date: Tue May 21 2002 - 12:48:47 GMT-3
The default priority for OSPF is always ONE, even in NBMA mode. Doyle's
book has a typographical error.
You can test this yourself by setting up a small OSPF NBMA scenario. If
you then type "show run" and you do NOT see the priority listed in the
configuration that means the priority is currently at the default value.
To verify this, type "show ip ospf int" and you will see the priority,
as in the NBMA example below.
RouterA#show ip ospf interface
Serial0 is up, line protocol is up
Internet Address 192.1.1.2/24, Area 0
Process ID 65, Router ID 2.2.2.2, Network Type BROADCAST, Cost: 64
Transmit Delay is 1 sec, State BDR, Priority 1
Designated Router (ID) 1.1.1.1, Interface address 192.1.1.1
<snip>
Jonathan
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
David Luu
Sent: Sunday, May 19, 2002 1:35 AM
To: Schwantz; ccielab@groupstudy.com
Subject: Re: Jeff Doyle pg 558 OSPF defauly priority 0
on an interface the default ospf priority is 1
when specifying neighbors in an nbma environment, the default is 0
At 03:39 PM 5/19/2002 +0800, Schwantz wrote:
>David,
>
>If that is the case, what does Doyle mean when he says that the default
>priority is 0 ?
>
>Kevin
>
>
>----- Original Message -----
>From: "David Luu" <wicked01@ix.netcom.com>
>To: "Kevin Mitnick" <kevin_ross46@yahoo.co.uk>;
><ccielab@groupstudy.com>
>Sent: Sunday, May 19, 2002 2:45 PM
>Subject: Re: Jeff Doyle pg 558 OSPF defauly priority 0
>
>
> > default priority is 1, and yes priority 0 does not let it
> > participate in the DR selection
> >
> > At 06:37 AM 5/19/2002 +0100, Kevin Mitnick wrote:
> > >Hi,
> > >
> > >I was reading page 558 of Jeff Doyle's Routing TCP/IP Volume 1 and
> > >came across this paragraph.
> > >
> > >"The neighbor command configures Rembrandt with the IP addresses of
> > >the interfaces of its three neighbors. The default priority is
> > >zero; by not changing the default at Rembrandt, none of its
> > >neighbors is eligible to become the DR or BDR?
> > >
> > >Doesn't having priority zero make a router ineligible to be DR or
> > >BDR ?
> > >
> > >When I read Solie ( CCIE Practical Studies page 762), it wrote
> > >
> > >"The hub router of the multipoint network, or the router that has a
> > >PVC to each site, should be statically configured as the DR. To
> > >accomplish this, set the priority of the spoke or remote routers to
> > >0. A priority of 0 tells OSPF that this interface or neighbor will
> > >not participate in the DR/BDR election process"
> > >
> > >Am I missing something ? Could someone help clarify the above two
> > >statements ? I read the archives and someone said that it might
> > >have something to do with the nieghbor statements. However, both
> > >books used the neighbor statements to identify their neigbors.
> > >
> > >Kevin
> > >
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