Tuesday, May 31, 2011

OSPF: unicast instead of multicast explanation?

"If the OSPF link is on a Non Broadcast Multi Access link, such as a frame relay, the OSPF packet will be a unicast rather than multicast." anyone explain this?

2 comments:

  1. Steve, nice to see you getting into the habit. This will all add up in the long run.

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  2. This is because FR does not allow multicasting or broadcasting. There is a broadcast command proprietary to Cisco but all it does is send an individual broadcast to every device in the network. This is not a true broadcast.

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