![如何从 Cisco 设备获取 DHCP 范围信息?(IOS 12)](https://linux22.com/image/560316/%E5%A6%82%E4%BD%95%E4%BB%8E%20Cisco%20%E8%AE%BE%E5%A4%87%E8%8E%B7%E5%8F%96%20DHCP%20%E8%8C%83%E5%9B%B4%E4%BF%A1%E6%81%AF%EF%BC%9F%EF%BC%88IOS%2012%EF%BC%89.png)
我正在尝试追踪一个相当大的网络上的设备和网络信息,该网络包含大量子网和 VLAN 等,其中大多数都由 Cisco [企业级] 交换机或路由器提供 DHCP。出于这个原因,我想找出各种 DHCP 池/作用域是什么,但我能找到的所有信息都是关于如何使用 Cisco IOS 配置 DHCP,这没有帮助,因为我不想更改作用域,只想显示它们当前是什么。
我可以执行show ip dhcp binding
获取 DHCP 客户端列表及其 IP,并猜测 DHCP IP 的有效范围,但这是相当不可取的...那么命令是什么展示这些信息(不改变现有配置)?
答案1
从相关设备尝试show ip dhcp pool
。要显示排除项,请尝试show run | i excluded-addresses
。
以下输出来自 Cisco 4507 交换机。
CORE#show ip dhcp pool
Pool VOICE :
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 254
Leased addresses : 42
Excluded addresses : 101
Pending event : none
1 subnet is currently in the pool :
Current index IP address range Leased/Excluded/Total
192.168.122.234 192.168.122.1 - 192.168.122.254 42 / 101 / 254
Pool GUEST :
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 254
Leased addresses : 9
Excluded addresses : 103
Pending event : none
1 subnet is currently in the pool :
Current index IP address range Leased/Excluded/Total
192.168.111.165 192.168.111.1 - 192.168.111.254 9 / 103 / 254
除外情况:
CORE#show run | i excluded-addresses
ip dhcp excluded-address 192.168.122.1 192.168.122.50
ip dhcp excluded-address 192.168.122.100 192.168.122.150
ip dhcp excluded-address 192.168.111.1 192.168.111.50
ip dhcp excluded-address 192.168.111.100 192.168.111.150