C3560 ip dhcp snooping: различия между версиями
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=snooping + relay + ip unnumbered = |
=snooping + relay + ip unnumbered = |
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| + | * Влан клиентов (в примере 3003) терменируется на свитче |
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| + | * Настроен IP unnumbered Loopback110 |
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| + | * Влан 3100 заведен со свитча на dhcp server и используется для пересылки запросов к серверу |
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| + | <PRE> |
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| + | interface Vlan3003 |
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| + | ip unnumbered Loopback110 |
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| + | ip helper-address 172.31.11.1 |
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| + | end |
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| + | </PRE> |
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| + | <PRE> |
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| + | interface Vlan3100 |
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| + | ip dhcp relay information trusted |
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| + | ip address 172.31.11.2 255.255.255.0 |
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| + | ip helper-address 172.31.11.2 |
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| + | end |
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| + | </PRE> |
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| + | <PRE> |
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| + | interface Loopback110 |
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| + | ip address 10.3.0.1 255.255.255.0 secondary |
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| + | ip address 10.4.0.1 255.255.255.0 secondary |
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| + | ip address 10.2.0.1 255.255.0.0 |
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| + | ip helper-address 172.31.11.1 |
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| + | end |
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| + | </PRE> |
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Версия 15:06, 29 ноября 2022
ip dhcp snoopping
Минимальный конфиг - L2
- Все в одном Vlan
ip dhcp snooping trustна порту куда включен сервер- Глобально
ip dhcp snooping vlan 3003ip dhcp snooping
Клиентский порт
interface GigabitEthernet0/7 switchport access vlan 3003 switchport mode access spanning-tree bpdufilter enable end
Порт куда включен DHCP Server
interface GigabitEthernet0/5 switchport access vlan 3003 switchport mode access spanning-tree bpdufilter enable ip dhcp snooping trust end
sh ip dhcp snooping
sh ip dhcp snooping Switch DHCP snooping is enabled DHCP snooping is configured on following VLANs: 3003 DHCP snooping is operational on following VLANs: 3003 Smartlog is configured on following VLANs: none Smartlog is operational on following VLANs: none DHCP snooping is configured on the following L3 Interfaces: Insertion of option 82 is enabled circuit-id default format: vlan-mod-port remote-id: 0026.5218.4900 (MAC) Option 82 on untrusted port is not allowed Verification of hwaddr field is enabled Verification of giaddr field is enabled DHCP snooping trust/rate is configured on the following Interfaces: Interface Trusted Allow option Rate limit (pps) ----------------------- ------- ------------ ---------------- GigabitEthernet0/5 yes yes unlimited Custom circuit-ids:
show ip dhcp snooping binding
MacAddress IpAddress Lease(sec) Type VLAN Interface ------------------ --------------- ---------- ------------- ---- -------------------- B8:27:EB:51:D8:A4 10.2.1.2 62 dhcp-snooping 3003 GigabitEthernet0/7 Total number of bindings: 1
snooping + relay + ip unnumbered
- Влан клиентов (в примере 3003) терменируется на свитче
- Настроен IP unnumbered Loopback110
- Влан 3100 заведен со свитча на dhcp server и используется для пересылки запросов к серверу
interface Vlan3003 ip unnumbered Loopback110 ip helper-address 172.31.11.1 end
interface Vlan3100 ip dhcp relay information trusted ip address 172.31.11.2 255.255.255.0 ip helper-address 172.31.11.2 end
interface Loopback110 ip address 10.3.0.1 255.255.255.0 secondary ip address 10.4.0.1 255.255.255.0 secondary ip address 10.2.0.1 255.255.0.0 ip helper-address 172.31.11.1 end
