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cisco:l2_notes

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cisco:l2_notes [2025/07/16 13:37] adminentcisco: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.
 +<code>r1(config)# interface g1
 +r1(config-if)# arp timeout 1800</code>
 +  * To make an ARP entry permanent, then use SNAP (Subnetwork Access Protocol).
 +<code>r1(config)# arp 10.0.0.2 0000.004b.39d1 snap</code>
 +  * To view the ARP table
 +<code>r1# show arp</code>
 +  * To clear the ARP table
 +<code>r1# clear arp-cache</code>
  
-AAA+==== 
 + 
 +====AAA====
  aaa new-model  aaa new-model
  aaa authentication login default group radius local  aaa authentication login default group radius local
cisco/l2_notes.1752673046.txt.gz · Last modified: by adminent