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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 |