Default Metrics section:
Since metrics for various protocols have limited comparability, the Default Metrics translate routes from other routing protocols into IGRP. You must set the metrics if you are exporting routes into IGRP. In addition, you must always take care to avoid loops in a topology with multiple exit points.
Default: Export all routes into IGRP as unreachable.
Delay field:
(Required) Specifies the IGRP delay metric in units of 10 microseconds each. This field displays only when IGRP is enabled on an interface.
Examples: Satellite=200000, Ethernet=100, 1.544 Mbit=2000, 64 Kbit=2000, 56 Kbit=2000, 10 Kbit=2000, 1 Kbit=2000
Range: 10 microseconds to 168 seconds.
Bandwidth field:
(Required) Specifies the IGRP bandwidth metric in units of inverted bits/second scaled by a factor of 10,000,000. This field displays only when IGRP is enabled on an interface.
Examples: Satellite=20, Ethernet=1000, 1.544 Mbit=6476, 64 Kbit=156250, 56 Kbit=178571, 10 Kbit=1000000, 1 Kbit=10000000
Range: 1200 bps to 10Gbps.
Reliability field:
(Required) Specifies the IGRP reliability metric as a fraction of 255 (that is, 255=100%).
Range: 1-255
Load field:
(Required) Specifies the IGRP load metric as a fraction of 255 (that is, 255=100%).
Range: 1-255
MTU field:
(Required) Specifies the IGRP Maximum Transmission Unit. A higher MTU will reduce the IGRP cost.
Range: Octets/bytes