From: Howard C. Berkowitz (hcb@gettcomm.com)
Date: Sat Jan 04 2003 - 21:25:59 GMT-3
At 3:41 PM -0800 1/4/03, syv wrote:
>I have the basic frame-relay / OPSF
>
> R1
> / \
>R2 R3
>
>R1: Hub, DR, point-to-multipoint subinterface
>R2 & R3: Spokes, physical interfaces
>
>Which is the "better-way" configure for the frame-relay and
>the DR?
>
>No broadcast with neighbors or Broadcast without neighbors
Well, there are reasons to do both. What problem are you trying to solve?
In general, broadcast is more processor- and memory-intensive but
easier to configure and maintain. Neighbor demands more
configuration but less resources.
It would be interesting to ask a lab proctor, if the instructions
don't give a problem statement, "I have two ways to do this. One
optimizes for resource use and one optimizes for maintainability. Do
you have a preference?"
>
>Alternative 1:
>=-=-=-=-=-=-=-
>Hub:
>interface Serial0/1
> no ip address
> encapsulation frame-relay
> frame-relay lmi-type ansi
>!
>interface Serial0/1.10 multipoint
> ip address 172.16.2.2 255.255.0.0
> ip ospf priority 255
> frame-relay map ip 172.16.5.5 205 ! no broadcasts, use neighbors
> frame-relay map ip 172.16.7.7 207
> no frame-relay inverse-arp
>!
>router ospf 10
> router-id 10.254.2.2
> network 172.16.0.0 0.0.255.255 area 1
> neighbor 172.16.5.5
> neighbor 172.16.7.7
>!
>!
>Spoke:
>!
>interface Serial1
> ip address 172.16.5.5 255.255.0.0
> encapsulation frame-relay
> ip ospf priority 0
> frame-relay map ip 172.16.2.2 502
> frame-relay map ip 172.16.7.7 502
> no frame-relay inverse-arp
>!
>router ospf 10
> router-id 10.5.5.5
> log-adjacency-changes
> network 172.16.0.0 0.0.255.255 area 1
>!
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>Alternative 2:
>=-=-=-=-=-=-=-
>
>Hub:
>interface Serial0/1
> no ip address
> encapsulation frame-relay
> frame-relay lmi-type ansi
>!
>interface Serial0/1.10 multipoint
> ip address 172.16.2.2 255.255.0.0
> ip ospf priority 255
> frame-relay map ip 172.16.5.5 205 broadcast
> frame-relay map ip 172.16.7.7 207 broadcast
> no frame-relay inverse-arp
>!
>router ospf 10
> router-id 10.254.2.2
> network 172.16.0.0 0.0.255.255 area 1
>!
>
>Spokes stay the same
>.
.
This archive was generated by hypermail 2.1.4 : Sat Feb 01 2003 - 07:33:41 GMT-3