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dhcp [2024/03/14 21:48] 114.119.130.33 old revision restored (2023/10/26 14:34) |
dhcp [2024/03/14 22:06] 114.119.141.71 old revision restored (2017/05/03 00:20) |
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=====DHCP===== | =====DHCP===== | ||
- | Use DHCP to address automatic IP assignment within a network. | ||
- | |||
====Configuration==== | ====Configuration==== | ||
Below is the configuration for DHCP in Cisco' | Below is the configuration for DHCP in Cisco' | ||
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====DHCP Relay==== | ====DHCP Relay==== | ||
Relays are configured with **'' | Relays are configured with **'' | ||
+ | |||
+ | The helper address is configured on the interface connected to the subnet which does not contain the DHCP server. | ||
+ | < | ||
+ | interface FastEthernet0/ | ||
+ | ip address 172.16.0.1 255.255.255.0 | ||
+ | ip helper-address 192.168.1.1 | ||
+ | | ||
+ | speed auto | ||
+ | end | ||
+ | |||
+ | </ | ||
+ | |||
+ | ====Show Commands==== | ||
+ | |||
+ | ===View Leases=== | ||
+ | < | ||
+ | R1#sh ip dhcp binding | ||
+ | Bindings from all pools not associated with VRF: | ||
+ | IP address | ||
+ | Hardware address/ | ||
+ | User name | ||
+ | 172.16.0.2 | ||
+ | 3230.342e.3430.3930. | ||
+ | 2e30.3030.312d.4661. | ||
+ | 302f.31 | ||
+ | 192.168.1.50 | ||
+ | 3230.332e.3366.6461. | ||
+ | 2e30.3030.302d.4661. | ||
+ | 302f.30 | ||
+ | </ | ||
+ | |||
+ | ===Server Statistics=== | ||
+ | < | ||
+ | R1#sh ip dhcp server statistics | ||
+ | Memory usage 25022 | ||
+ | Address pools 2 | ||
+ | Database agents | ||
+ | Automatic bindings | ||
+ | Manual bindings | ||
+ | Expired bindings | ||
+ | Malformed messages | ||
+ | Secure arp entries | ||
+ | |||
+ | Message | ||
+ | BOOTREQUEST | ||
+ | DHCPDISCOVER | ||
+ | DHCPREQUEST | ||
+ | DHCPDECLINE | ||
+ | DHCPRELEASE | ||
+ | DHCPINFORM | ||
+ | |||
+ | Message | ||
+ | BOOTREPLY | ||
+ | DHCPOFFER | ||
+ | DHCPACK | ||
+ | DHCPNAK | ||
+ | </ | ||
+ | |||
+ | ===Pool Stats=== | ||
+ | Note that '' | ||
+ | < | ||
+ | R1#sh ip dhcp pool | ||
+ | |||
+ | Pool LAN : | ||
+ | | ||
+ | | ||
+ | Total addresses | ||
+ | | ||
+ | | ||
+ | 1 subnet is currently in the pool : | ||
+ | | ||
+ | | ||
+ | </ |