Protocol-dependent module
- Protocol-dependent module
Protocol-dependent modules (PDMs) are used by the routing protocol EIGRP to make decisions about adding routes learned from other sources; for example other routers or routing protocols to the routing table. EIGRP offers support for various routed protocols (e.g. IP, IPX, and AppleTalk) through PDMs. The PDM is also able of carrying information from the routing table to the topology table.
"In theory, EIGRP can add PDMs to easily adapt to new or revised routed protocols such as IPv6. Each PDM is responsible for all functions related to its specific routed protocol. The IP-EIGRP module is responsible for the following functions:
# Send and receive EIGRP packets that bear IP data.
# Notify DUAL (Diffusing Update Algorithm) of new IP routing information that is received.
# Maintain the results of DUAL routing decisions in the IP routing table.
# Redistribute routing information that was learned by other IP-capable routing protocols." [2003 Cisco Systems]
References
Wikimedia Foundation.
2010.
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