notes: RIP Summarization, Maximum Paths

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Summarization
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- By default auto-summarization is enabled for RIP.

Limitation of RIP summarization:

- More than one major network summary per interface is not allowed.
- Cannot summarize past the major network. For example the summary 10/7 is not allowed.

- When doing manual summarization, make sure auto-summary is off.
- The defining characteristic of a classful routing protocol is that it does not advertise an address mask along with the advertised destination address.

- For every packet passing through the router:
1- If the destination address is a member of a directly connected major network, the subnet mask configured on the interface attached to that network will be used to determine the subnet of the destination address. Therefore, the same subnet mask must be used consistently throughout that major network.
2- If the destination address is not a member of a directly connected major network, the router will try to match only the major class A, B, or C portion of the destination address.

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COMMANDS
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1. Limits the advertisements out of that interface to ONLY the summary

interface fa0/0
ip summary-address rip {ip} {mask}

- It's subject to a subnet of this aggregate being in the RIP database


Maximum Paths

-default max value of 4


command:

router rip:
maximum paths #

verification:

show ip protocols