Re: loopback ospf network

From: Ron (id353@singnet.com.sg)
Date: Sat Oct 19 2002 - 03:44:37 GMT-3

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Chenyan,

Explaination direct from Cisco:

Q: Why are loopbacks advertised as /32 host routes in OSPF?

A: Loopbacks are considered host routes in OSPF, and they're advertised as /32. For more information, see section 9.1 of RFC 2328. In Cisco IOS . version 11.3T and 12.0, if the ip ospf network point-to-point command is configured under loopbacks, then OSPF advertises the loopback subnet as the actual subnet configured on loopbacks.

Refer to http://www.cisco.com/warp/public/104/9.html#QB.

Ron

From chenyan <chenyan@deeptht.com.cn> on 18 Oct 2002:

> hi,guys
> Sometimes I saw
>
> interface Loopback0
> ip address 135.3.3.3 255.255.255.0
> ip ospf network point-to-point
>
> what's mean that the ospf network type is used in loopback interface?
>
> Thanks

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