Siemens S223 User Manual

User Manual                                                                               UMN:CLI 
SURPASS hiD 6615 S223/S323 R1.5 

A50010-Y3-C150-2-7619                                                                         259 

To set the number of DHCP packet per second (pps) that an interface can receive, use 
the following command. 

 

 <1-255> 

Sets a rate limit for DHCP packets. (unit: pps) 

 

 

Global 

Deletes a rate limit for DHCP packets. 

 

Normally, the DHCP rate limit is specified to untrusted interfaces and 15 pps is recom-
mended for a proper value. However, if you want to set a rate limit for trusted interfaces, 
keep in mind that trusted interfaces aggregate all DHCP traffic in the switch, and you will 
need to adjust the rate limit to a higher value. 

 

The number of entry registration in DHCP snooping binding table can be limited. If there 
are too many DHCP clients on an interface and they request IP address at the same time, 
it may cause IP pool exhaustion. 

To set the number of entry registration in DHCP snooping binding table, use the following 
command. 

 

 <1-2147483637> 

Enables a DHCP lease limit on a specified untrusted 
port. 
1-2147483637: the number of entry registration 

 

 

Global 

Deletes a DHCP lease limit. 

 

You can limit the number of entry registration only for untrusted interfaces, because the 
DHCP snooping binding table only contains the information for DHCP messages from un-
trusted interfaces. 

 

The hiD 6615 S223/S323 can verify that the source MAC address in a DHCP packet that 
is received on untrusted ports matches the client hardware address in the packet. 

To enable the source MAC address verification, use the following command. 

Enables the source MAC address veri-
fication. 

 

Global 

Disables the source MAC address veri-
fication.