HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 3 - IP Services Conf - Page 50

Setting the DSCP value for DHCP packets, Displaying and maintaining the DHCP relay agent

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Step 5. Configure non-user-defined Option 82. 6. Configure user-defined Option 82. Command Remarks • Configure the padding format for Optional. Option 82: By default, dhcp relay information format • The padding format for Option 82 { normal | verbose [ node-identifier is normal. { mac | sysname | user-defined node-identifier } ] } • Configure the code type for the circuit ID sub-option: • The code type for the circuit ID sub-option depends on the padding format of Option 82. Each field has its own code type. dhcp relay information circuit-id format-type { ascii | hex } • Configure the code type for the remote ID sub-option: dhcp relay information remote-id format-type { ascii | hex } • The code type for the remote ID sub-option is hex. The code type configurations for the circuit ID sub-option and remote ID sub-option apply to non-user-defined Option 82 only. • Configure the padding content for the circuit ID sub-option: dhcp relay information circuit-id string circuit-id • Configure the padding content for the remote ID sub-option: dhcp relay information remote-id string { remote-id | sysname } Optional. By default, the padding content depends on the padding format of Option 82. Setting the DSCP value for DHCP packets An IPv4 packet header contains an 8-bit Type of Service (ToS) field. As defined in RFC 2474, the first six bits set the Differentiated Services Code Point (DSCP) value, and the last two bits are reserved. Network devices use the DSCP value as a reference to determine the packet priority for transmission. To set the DSCP value for DHCP packets: Step 1. Enter system view. 2. Set the DSCP value for DHCP packets sent by the DHCP relay agent. Command system-view dhcp dscp dscp-value Remarks N/A Optional. By default, the DSCP value is 56. Displaying and maintaining the DHCP relay agent Task Command Remarks Display information about DHCP display dhcp relay { all | interface server groups correlated to a interface-type interface-number } [ | { begin | Available in any view specified interface or all interfaces. exclude | include } regular-expression ] 42

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42
Step
Command
Remarks
5.
Configure
non-user-defined
Option 82.
•
Configure the padding format for
Option 82:
dhcp
relay
information
format
{
normal
|
verbose
[
node
-
identifier
{
mac
|
sysname
|
user
-
defined
node-identifier
} ] }
•
Configure the code type for the
circuit ID sub-option:
dhcp relay information circuit-id
format-type
{
ascii
|
hex
}
•
Configure the code type for the
remote ID sub-option:
dhcp relay information remote-id
format-type
{
ascii
|
hex
}
Optional.
By default,
•
The padding format for Option 82
is
normal
.
•
The code type for the circuit ID
sub-option depends on the padding
format of Option 82. Each field has
its own code type.
•
The code type for the remote ID
sub-option is
hex
.
The code type configurations for the
circuit ID sub-option and remote ID
sub-option apply to non-user-defined
Option 82 only.
6.
Configure
user-defined Option
82.
•
Configure the padding content for
the circuit ID sub-option:
dhcp relay information circuit-id
string
circuit-id
•
Configure the padding content for
the remote ID sub-option:
dhcp relay information remote-id
string
{
remote-id
|
sysname
}
Optional.
By default, the padding content
depends on the padding format of
Option 82.
Setting the DSCP value for DHCP packets
An IPv4 packet header contains an 8-bit Type of Service (ToS) field. As defined in RFC 2474, the first six
bits set the Differentiated Services Code Point (DSCP) value, and the last two bits are reserved. Network
devices use the DSCP value as a reference to determine the packet priority for transmission.
To set the DSCP value for DHCP packets:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Set the DSCP value for DHCP
packets sent by the DHCP relay
agent.
dhcp dscp
dscp-value
Optional.
By default, the DSCP value is 56.
Displaying and maintaining the DHCP relay agent
Task
Command
Remarks
Display information about DHCP
server groups correlated to a
specified interface or all interfaces.
display dhcp relay
{
all
|
interface
interface-type
interface-number
} [
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view