Cisco 2521LF - 2521LF Router Manuel d'utilisateur télécharger pdf (Page 15)

6-29CSE: Networking Fundamentals — WAN Basics

www.cisco.com

Routing Requirements

–Is the protocol suite active on this device?

–Is the destination network known to this

device?

•Is there an entry in the routing table?

•Is the route currently available?

–Which outbound interface represents the

best path?

•Lowest metric path is preferred

•Equal lowest metric paths are shared

6-30CSE: Networking Fundamentals — WAN Basics

www.cisco.com

Routing Information

–Most of the necessary information is

contained in the routing tableI 172.16.8.0 [100/118654] via 172.16.7.9, 00:00:23, Serial0

I 172.16.8.0 [100/118654] via 172.16.7.9, 00:00:23, Serial0

I -- How the route was learned (IGRP)

172.16.8.0 -- Destination logical network or subnet

[100 -- Administrative distance (trustworthiness factor)

/118654] -- Metric value (reachability)

via 172.16.7.9 -- Next-hop logical address (next router)

00:00:23 -- Age of entry (in hours:minutes:seconds)

Serial0 -- Interface through which the route was learned

and through which the packet will leave

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Cisco 2521LF - 2521LF Router Manuel d'utilisateur Page 15