HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 3 - IP Services Comm - Page 39

dhcp relay security refresh enable

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all: Specifies that all client entries are to be removed. dynamic: Specifies that dynamic client entries are to be removed. static: Specifies that manual client entries are to be removed. Description Use dhcp relay security static to configure a static client entry, which is the binding between IP address, MAC address, and Layer 3 interface on the relay agent. Use undo dhcp relay security to remove specified client entries from the relay agent. No manual client entry is configured on the DHCP relay agent by default. • When using the dhcp relay security static command to bind an interface to a static client entry, make sure that the interface is configured as a DHCP relay agent. Otherwise, entry conflicts may occur. • The undo dhcp relay security interface command is used to remove all the dynamic client entries from the interface. Related commands: display dhcp relay security. Examples # Bind DHCP relay interface VLAN-interface 2 to IP address 10.10.1.1 and MAC address 0005-5d02-f2b3 of the client. system-view [Sysname] dhcp relay security static 10.10.1.1 0005-5d02-f2b3 interface vlan-interface 2 dhcp relay security refresh enable Syntax dhcp relay security refresh enable View undo dhcp relay security refresh enable System view Default level 2: System level Parameters None Description Use dhcp relay security refresh enable to enable the DHCP relay agent to periodically refresh dynamic client entries. Use undo dhcp relay security refresh enable to disable periodic refresh of dynamic client entries. By default, the DHCP relay agent is enabled to periodically refresh dynamic client entries. If you disable the DHCP relay agent from periodically refreshing dynamic client entries, such entries do not age automatically. Therefore, if a client relinquishes its IP address, you need to manually remove the corresponding dynamic client entry on the DHCP relay agent. Related commands: dhcp relay security tracker and dhcp relay security static. 32

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32
all
: Specifies that all client entries are to be removed.
dynamic
: Specifies that dynamic client entries are to be removed.
static
: Specifies that manual client entries are to be removed.
Description
Use
dhcp relay security static
to configure a static client entry, which is the binding between IP address,
MAC address, and Layer 3 interface on the relay agent.
Use
undo dhcp relay security
to remove specified client entries from the relay agent.
No manual client entry is configured on the DHCP relay agent by default.
•
When using the
dhcp relay security static
command to bind an interface to a static client entry,
make sure that the interface is configured as a DHCP relay agent. Otherwise, entry conflicts may
occur.
•
The
undo dhcp relay security interface
command is used to remove all the dynamic client entries
from the interface.
Related commands:
display dhcp relay security
.
Examples
# Bind DHCP relay interface VLAN-interface 2 to IP address 10.10.1.1 and MAC address
0005-5d02-f2b3 of the client.
<Sysname> system-view
[Sysname] dhcp relay security static 10.10.1.1 0005-5d02-f2b3 interface vlan-interface
2
dhcp relay security refresh enable
Syntax
dhcp relay security refresh enable
undo dhcp relay security refresh enable
View
System view
Default level
2: System level
Parameters
None
Description
Use
dhcp relay security refresh enable
to enable the DHCP relay agent to periodically refresh dynamic
client entries.
Use
undo dhcp relay security refresh enable
to disable periodic refresh of dynamic client entries.
By default, the DHCP relay agent is enabled to periodically refresh dynamic client entries.
If you disable the DHCP relay agent from periodically refreshing dynamic client entries, such entries do
not age automatically. Therefore, if a client relinquishes its IP address, you need to manually remove the
corresponding dynamic client entry on the DHCP relay agent.
Related commands:
dhcp relay security tracker
and
dhcp relay security static
.