[Day 7] 5. RIP v1 and v2

| RIP v1 | RIP v2 | | ------------------------------------------ | --------------------------------------------- | | works with FLSM (Fixed Length Subnet Mask) | works with VLSM (Variable Length Subnet Mask) | | Does not send Subnet Mask | Sends Subnet Mask | | Classfull | Classless | | Works with 255.255.255.255 (All ones) | 224.0.0.9 (Multicast) | | No authentication | Authentication | | Command:

router rip

version 2

• Classful: Assumes default subnet masks and does not include subnet information in updates.
• Classless: Includes subnet masks in updates, supporting flexible and variable subnetting.

Multicast in RIP v2

Multicast is used to efficiently send routing updates:

• Multicast Address: RIP v2 uses the multicast address 224.0.0.9 to send routing updates.
• Efficiency: This allows RIP v2 to send updates to all RIP-enabled routers on the local network without flooding the entire network, unlike RIP v1 which uses broadcast.

Authentication

RIP v1: Does not support authentication. All RIP updates are sent in plain text.

RIP v2: Supports authentication, allowing updates to be secured with passwords (clear-text or MD5). This ensures that only authorized routers can participate in the routing process.

Backward Compatibility

• RIP v2 is designed to be compatible with RIP v1.
• It can exchange routing information with RIP v1 routers, although RIP v1 will not understand some features of RIP v2 (like subnet masks or authentication).
• RIP v2 can communicate with RIP v1 routers, but the additional features of RIP v2 are not utilized by RIP v1 routers.