prefix length

EIGRP advertises a prefix length for each destination network.

Prefix Length:字首長度，mask長度，即子網路遮罩為1的位數。

Sample：

ip address 172.16.1.1 255.255.255.0

it will advertise 172.16.1.0 with a prefix length of 24.

Likewise, if the router is configured as follows:

ip address 172.16.250.1 255.255.255.252

it will advertise 172.16.250.0 with a prefix length of 30.

本文轉simmy51CTO部落格，原文連結：http://blog.51cto.com/helpdesk/161851，如需轉載請自行聯系原作者