Re: physical/sub-interface at hub. brodadcast/neighbor

From: Herve Bruyere (hbruyere@cisco.com)
Date: Tue Feb 11 2003 - 08:48:40 GMT-3

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Your config is correct but you don't need the "ip ospf network non-broadcast" as
this is the default over frame-relay.

If you choose to use "network broadcast", you don't need static neighbor but you
need to use ip ospf priority to set the DR at the hub.

If you choose "network multipoint", there is no DR/BDR election. Easiest config.

Rgards

Kumar, Senthil wrote:
> i am running a frame-relay nbma non-broadcast mode.
>
> should i use broadcast keyword in my frame-relay map statement
> - i assume that you shouldn't use broadcast keyword for non-brodacast mode
>
> do i need to define static neighbor at the hub. or in hub and spoke.
>
> - i assume the hub needs static neighbor definition for both spokes.
> and the spoke needs static neighbor definition for hub only...
>
> h - spoke1
> --- spoke2
>
> hub - physical (10.0.0.1)
> spoke- sub-interface (10.0.0.2, 10.0.0.3)
>
> hub:
>
> conf t
> interface serial 0/0
> clock rate 64000
> encapsulation frame-relay
> no arp frame-relay
> no frame-relay inverse-arp
> ip address 10.0.0.1 255.255.255.0
> frame-relay map ip 10.0.0.2 102
> frame-relay map ip 10.0.0.3 103
> ip ospf network non-broadcast
> !
> router ospf 1
> net 10.0.0.0 0.0.0.255 area 0
> neig 10.0.0.2 (spoke1)
> neig 10.0.0.3 (spoke2)
> !
>
> spoke:
>
> conf t
> interface serial0/0
> clock rate 64000
> encapsulation frame-relay
> no arp frame-relay
> no frame-relay inverse-arp
> no ip address
> !
> int s0/0.1 point
> ip add 10.0.0.2 255.255.255.0
> frame-realy interface-dlci 201
> ip ospf network non-broadcast
> !
> router ospf 1
> net 10.0.0.0 0.0.0.255 area 0
> nei 10.0.0.1 pri 10 (hub-only)
> !
>
> or the spoke can be configured with a multipoint sub interface
>
> conf t
>
> int s0/0
> encap frame-relay
> clock rate 64000
> no arp frame-relay
> no frame-relay inverse-arp
> no ip address
> int s0/0.1 multi
> ip add 10.0.0.2 255.255.255.0
> frame-relay map ip 10.0.0.1 201
> frame-relay map ip 10.0.0.2 201
> ip ospf network non-broadcast
> !
> router ospf 1
> net 10.0.0.0 0.0.0.255 area 0
> nei 10.0.0.1 (hub-only)
> !
.

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