SMC Networks SMC7908VoWBRA manual 4-46, Poison Reverse

CONFIGURING THE VOICE ADSL ROUTER

Parameter	Description
Poison Reverse	A method for preventing loops that would cause
	endless retransmission of data traffic.
Authentication Required	• None: No authentication.
	• Password: A password authentication key is
	included in the packet. If this does not match
	what is expected, the packet will be discarded.
	This method provides very little security as it
	is possible to learn the authentication key by
	watching RIP packets.
	• MD5: An algorithm that is used to verify data
	integrity through the creation of a 128-bit
	message digest from data input (which may
	be a message of any length) that is claimed to
	be as unique to that specific data as a
	fingerprint is to a specific individual.
Authentication Code	Password or MD5 Authentication key.

RIP sends routing-update messages at regular intervals and when the network topology changes. When a router receives a routing update that includes changes to an entry, it updates its routing table to reflect the new route. RIP routers maintain only the best route to a destination. After updating its routing table, the router immediately begins transmitting routing updates to inform other network routers of the change.

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