Table Problem

IGRP Routes Not in the Routing Table?Cause: Missing or Incorrect network Statement

Several reasons exist for IGRP routes not being in the routing table. The one discussed here is a missing or incorrect network statement in the router's configuration. Other causes are mentioned at the beginning of this section. Just glancing through the flowchart might tell you the cause that fits your problem the most.

In the case of a wrong or missing network statement, IGRP will not be capable of receiving any updates on a particular interface. Recall from Chapter 3 that a network statement has two purposes:

• To enable IGRP on the interface for sending and receiving IGRP routes

• To advertise that network in IGRP updates Figure 5-2 shows the flowchart to follow to solve this problem. Page 124

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