Edge-Core ES4624-SFP Basic Management Manual page 491

Command Mode：Globe mode.
Default Settings：There is no HELPER SERVER address by default.
Usage Guide： ：DHCP SNOOPING will send the monitored binding information to
HELPER SERVER to save it. If the switch starts abnormally, it can recover the binding
data from HELPER SERVER. The HELPER SERVER function usually is integrated into
DCBI packet. The DHCP SNOOPING and HELPER SERVER use the UDP protocol to
communicate, and guarantee the arrival of retransmitted data. HELPER SERVER
configuration can also be used to sent DOT1X user data from the server, the detail of
usage is described in the chapter of "dot1x configuration".
Two HELPER SERVER addresses are allowed, DHCP SNOOPING will try to connect to
PRIMARY SERVER in the first place. Only when the PRIMARY SERVER is unreachable,
will the switch c HELPER SERVER connects to SECONDARY SERVER.
Please pay attention：source address is the effective management IP address of the
switch, if the management IP address of the switch changes, this configuration should be
updated in time.
Example ： Set the local management IP address as 100.1.1.1, primary HELPER
SERVER address as 100.1.1.100 and the port as default value.
switch(config)#interface vlan 1
switch(Config- If-Vlan1)#ip address 100.1.1.1 255.255.255.0
switch(Config-if-Vlan1)exit
switch(config)#ip user helper-address 100.1.1.100 source 100.1.1.1
17.2.2.24 ip user private packet version two
Command: ip user private packet version two
no ip user private packet version two
Function: The switch choose private packet version two to communicate with Edge-Core
inter security management background system.
Parameter: None.
Command Mode: Global Mode.
Default: The switch choose private packet version one to communicate with DCBI.
Usage Guide: If the DCBI access control system is applied, the switch should be
configured to use private protocol of version one to communicate with the DCBI server.
However, if TrustView is applied, version two should be applied.
Example: To configure the switch choose private packet version two to communicate
with Edge-Core inter security management background system.
switch(config)#ip user private packet version two
Relative Command: ip user helper-address
17.2.2.25 show ip dhcp snooping
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