notes: RIP Network statement, Passive-interface

Network statement on RIP has no mask option, and assumes classful boundaries, even with RIPv2.
- The updates sent to neighbors uses the assigned subnet masks from the interface on which the "network" address is configured.

command under router rip process

network {ip}

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Passive interfaces
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- no neigbhor relationship will be formed.
- "Passive-interface" is not a RIP-specific command.
- "Passive-interface" stops the sending of updates (Response.Msg) out of the interface specified.
- The router will still listen to RIP updates and update its routing table accordingly upon receipt of a response update message on the passive interface.
- The router will still advertises that interface address in normal updates to other peers.
- To stop the transmission of broad/multicast updates and send only unicast updates to a neighbor, include the passive-interface command along with the neighbor command under the RIP process.

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COMMANDS
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1. Disables sending of RIP updates on all interfaces

passive-interface default

2. then individually Stops the sending of updates out of the interface specified

[no] passive-interface {interface}

- Still receives updates and populates the routing table
- Still advertises that interface in normal updates to other peers