The reason why only the rip V2 package is sent instead of the V1 package

My current vro:

LAN interface configuration: 192.168.1.1/255.255.255.0 <br/> WAN Interface Configuration: 10.10.100.123/255.255.255.0

The configuration of RIP is the same for LAN and WAN, that is, it supports both V1 and V2, but the actual situation is:

1. V1 and V2 packages can be captured on the LAN-side Pc <br/> 2. Only V2 packages can be captured on the WAN-side PC.

 

Because the same openSource codeTherefore, the software problem was ruled out, and the rip configurations of the LAN and WAN were the same, so it was very strange at the time. Later I found the reason:

1. v1 does not support non-category addresses, that is, 10. x. x. the subnet mask of the X address must be 255.0.0.0, and 192. x. x. the subnet mask of x <br/> must be 255.255.255.0, otherwise the V1 package will not be issued <br/> 2. v2 supports classless IP addresses, that is, 10. x. x. sub-address of x <br/> The netmask can issue v2 packets even if it is 255.255.255.0