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OSPF Area 0

Hypothetical Question:

If you have only one area in your network does it have to be area 0 or can it be any other area like say area 1 or 2 etc. As far as design considersations are concerned it would be best to have area 0 for future expansions but what if there was always going to be only one area. Thanks for the help.

2 REPLIES

Re: OSPF Area 0

If you only have one area, it can be any area # you wish. This is valid from the RFC as well. When using MULTIPLE AREAs area 0 is required.

As for using area 0 or another area # if you just have one area for now, there are different schools of thought on which one to use. Some say using a non-zero area makes it easier when you expand to or merge networks together and need multiple areas.

Re: OSPF Area 0

If you only have one area, it can be any area # you wish. This is valid from the RFC as well. When using MULTIPLE AREAs area 0 is required.

As for using area 0 or another area # if you just have one area for now, there are different schools of thought on which one to use. Some say using a non-zero area makes it easier when you expand to or merge networks together and need multiple areas.

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