Dasan V5808 - DHCP Filter on Trust Port; DHCP Rate Limit

UMN:CLI User Manual
V5808
348
8.5.7.3 DHCP Filter on Trust Port
To filter broadcast request packets outgoing from the specified trust port, use the
following command.
Command
Mode
Description
ip dhcp snooping trust PORTS
filter egress bcast-req
Global
Filters egress broadcast request packets on the trust
port.
no ip dhcp snooping trust
PORTS filter egress bcast-req
Disable filtering egress broadcast request packets on
the trust port.
8.5.7.4 DHCP Rate Limit
To set the number of DHCP packets per second (pps) that an interface can receive, use
the following command.
Command
Mode
Description
ip dhcp snooping limit-rate
PORTS <1-255>
Global
Sets a rate limit for DHCP packets. (unit: pps)
no ip dhcp snooping limit-rate
PORTS
Deletes a rate limit for DHCP packets.
Normally, the DHCP rate limit is specified to untrusted interfaces and 15 pps is
recommended for a proper value. If, however, 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.
To set the number of DHCP discover/request message per second, use the following
command.
Command
Mode
Description
ip dhcp snooping limit-rate
{ discover | request } <1-32767>
Global
Receieves the DHCP discover/request message as
much as the specified packet per second.
1-32767: packet per second
no ip dhcp snooping limit-rate
{ discover | request }
Disables the discover/request message limit function.
DHCP snooping function should be activated before setting the ip dhcp snooping limit-
rate { discover | request } command.
To display the rate limit for DHCP packets, use the following command.
Command
Mode
Description
show ip dhcp snooping limit-
rate {config | status}
Enable
Global
Shows the rate limit for DHCP packets.
config: user configuration
status: current status of DHCP packets limit
i
i