On Fri, 10 Nov 2000, David Armstrong wrote:
> Last night at our BSCN study group meeting in Dallas we had some questions
> about OSPF that we weren't able to resolve. If someone or ones could answer
> these it would clarify some areas we're a little fuzzy on. Also, if you're
> iin the Dallas Ft. Worth area and would like to attend, we'd love to have
> you join us..
>
> Thanks for any help,
>
> David Armstrong
>
>
> 1) What is the default time period that the BDR waits when listening to
> LSA's from the DR before it decides that the DR is down and promotes itself
> to DR. All the literature we could find simply said that the BDR waits for
> the specified time period but never said what that period is.
This is the "dead interval", which is 4 times the hello interval, which is
40 seconds (hello interval is 10 seconds).
>
> 2) In a Point-to-Point network in which the router in Area 0 is connected to
> FR, ISDN, X.25 or ATM branch offices (networks), how does convergence and
> updates take place? From what we've found a DR and BDR is not elected in a
> strictly Point-to-Point network.
Their is no DR/BDR for that link, but the routers do become
adjacent. BDR/DR is not something that is a "necessity" for something
like OSPF to operate...........it is elected so that every router doesn't
send LSA's to every router, to calm that sort of madness. All that is
required for routers to exchange LSA's is that they become
adjacent. Routers on PtP links always become adjacent (barring any
misconfiguration).
>
> 3) The books and tutorials all state that "router ospf 6" defines ospf on
> the router with a process ID of 6. They then all say that you shouldn't
> define more than one process. Does that mean that you can have a router with
> the following:
>
> router ospf 6
> network 10.100.0.0 0.0.255.255
>
> router ospf 7
> network 10.200.0.0 0.0.255.255
>
> If this is an allowed configuration, what kind of instances would it be used
> for? Also, exactly what is the process ID used for?
The above is legal, but you need area statments on the end of those
network statments. I have no idea why anyone would want to do this
however.
Brian
>
>
>
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-----------------------------------------------
Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
Network Administrator
ShreveNet Inc. (ASN 11881)
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