Qtech QSW-8200-28T-POEAC- DC [70/79] Ip dhcp snooping limit rate

User Manual

Chapter 5. Commands for DHCP Snooping 70

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 Port means port number which begins from 1.

 Example: Set subscriber-id format of DHCP snooping option82 as hexadecimal format.

 Switch(config)#ip dhcp snooping information option subscriber-id format hex

5.26 ip dhcp snooping limit-rate

 Command: ip dhcp snooping limit-rate <pps>

 no ip dhcp snooping limit-rate

 Function: Set the DHCP message rate limit

 Parameters: <pps>: The number of DHCP messages transmitted in every minute,

ranging from 0 to 100. Its default value is 100. 0 means that no DHCP message will be

transmitted.

 Command Mode: Globe mode

 Default Settings: The default value is 100.

 Usage Guide: After enabling DHCP snooping, the switch will monitor all the DHCP

messages and implement software transmission. The software performance of the

switch is relative to the type of the switch, its current load and so on.

 Example: Set the message transmission rate as 50pps.

 switch(config)#ip dhcp snooping limit-rate 50

5.27 ip dhcp snooping trust

 Command: ip dhcp snooping trust

 no ip dhcp snooping trust

 Function: Set or delete the DHCP Snooping trust attributes of a port.

 Parameters: None

 Command Mode: Port mode

 Default Settings: By default, all ports are non-trusted ports

 Usage Guide: Only when DHCP Snooping is globally enabled, can this command be set.

When a port turns into a trusted port from a non-trusted port, the original defense

action of the port will be automatically deleted; all the security history records will be

cleared (except the information in system log).

 Example: Set port ethernet1/0/1 as a DHCP Snooping trusted port

 switch(config)#interface ethernet 1/0/1

 switch(Config- Ethernet 1/0/1)#ip dhcp snooping trust

1 2

Port

1 byte 1 byte

2 byte

Suboption

type

Length