Information Technology Reference
In-Depth Information
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Periodic route updates sent every 30 seconds to multicast address 224.0.0.9.
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25 routes per RIP message (24 if you use authentication).
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Supports authentication.
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Implements split horizon with poison reverse.
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Implements triggered updates.
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Subnet mask included in route entry.
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Administrative distance for RIPv2 is 120.
IGRP Summary
The characteristics of IGRP are summarized as follows:
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Distance vector protocol.
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Uses IP protocol 9.
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Classfull protocol (no support for CIDR).
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No support for VLSMs.
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Composite metric of bandwidth and delay.
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Load and reliability can be factored into the metric.
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Route updates sent every 90 seconds.
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104 routes per IGRP message.
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No support for authentication.
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Implements split horizon with poison reverse.
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Implements triggered updates.
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By default, equal-cost load balancing; unequal-cost load balancing with the
variance
command.
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Administrative distance is 100.
EIGRP Summary
The characteristics of EIGRP are summarized as follows:
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Hybrid routing protocol (distance vector that has link-state protocol characteristics).
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Uses IP protocol 88.
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