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| cisco:l2_notes [2025/07/16 13:37] – adminent | cisco:l2_notes [2025/08/05 04:01] (current) – adminent | ||
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| =====Layer 2 Notes===== | =====Layer 2 Notes===== | ||
| + | ====ARP==== | ||
| + | * Address Resolution Protocol. Maps MAC addresses to IPs. | ||
| + | * Default ARP timeout is four hours or 14,400 seconds. | ||
| + | * Change default ARP timeout, in seconds. | ||
| + | < | ||
| + | r1(config-if)# | ||
| + | * To make an ARP entry permanent, then use SNAP (Subnetwork Access Protocol). | ||
| + | < | ||
| + | * To view the ARP table | ||
| + | < | ||
| + | * To clear the ARP table | ||
| + | < | ||
| - | AAA | + | ==== |
| + | |||
| + | ====AAA==== | ||
| aaa new-model | aaa new-model | ||
| aaa authentication login default group radius local | aaa authentication login default group radius local | ||