Ruijie RG-S2900G-E Series, Руководство по настройке

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Configuration Guide DHCPv6 Snooping Configuration
Sometimes, in a stable network, you may need to clear the entries related to the ports who are
linked down to reduce the occupation of hardware entries. This function can help you to realize this
end. It should be noted that frequent link oscillation should be avoided.
To clear the dynamically bound entries when the port is linked down, run the following commands in
the privileged EXEC mode.
Command Function
Ruijie# configure terminal Enter the global configuration mode.
Ruijie(config)# ipv6 dhcp snooping
link-detection
Clear the dynamically bound entries when the
port is linked down.
Ruijie(config)# end Exit to the privileged EXEC mode.
To restore the setting to the default value, run the no ipv6 dhcp snooping link-detection
command in the global configuration mode.
Configuration example:
Ruijie# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Ruijie(config)# ipv6 dhcp snooping link-detection
Ruijie(config)# end
Adding the Dynamically Bound Entries to the Hardware Filtering Table Lingeringly
By default, the dynamically bound entries are added to the hardware filtering table in real time.
When the DHCPv6 client detects IPv6 address conflict, it responds with the DHCPv6 decline
message, based on which DHCPv6 Snooping deletes the dynamically bound entry. With this
function enabled, the dynamically bound entries will be added to the hardware filtering table only
when IPv6 address conflict is not detected in the specific period of time. In the environment of fewer
IPv6 address conflict, if this function is enabled, the client cannot access the network in the specific
delay time after obtaining IPv6 address. Hence, the dynamically bound entries are added to the
hardware filtering table by default. In the environment of more IPv6 address conflict, if this function is
enabled, the client adds the dynamically bound entries to the hardware filtering table only after
detecting no IPv6 address conflict in the specific delay time.
To add the dynamically bound entries to the hardware filtering table lingeringly, run the following
commands in the privileged EXEC mode.
Command Function
Ruijie# configure terminal Enter the global configuration mode.
Ruijie(config)# ipv6 dhcp snooping
binding-delay seconds
Add the dynamically bound entries to the
hardware filtering table lingeringly, which is
disabled by default.
Ruijie(config)# end Enter the privileged EXEC mode.