H3C SOHO IE4300, Справочник по командам

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When you configure an
if-match hardware-address
rule, follow these guidelines:
•
The hardware address type supports only the MAC address. A rule does not match clients with
hardware addresses of other types.
•
The specified hardware address must be of the same length as the client hardware addresses
to be matched. To match MAC addresses, the specified hardware address must be six bytes
long.
•
The fs and 0s in the mask for the hardware match operation can be noncontiguous. For
example, the rule
if-match rule
1
hardware-address
0094-0000-1100
mask
ffff-0000-ff00 matches hardware addresses in which the first two bytes are 0094 and the fifth
byte is 11.
When you configure an
if-match option
rule, follow these guidelines:
•
To match packets that contain an option, specify only the
option-code
argument.
•
To match a hexadecimal number by AND operations, specify the
option option-code hex
hex-string mask mask
options.
•
To match a hexadecimal number directly, specify the
option option-code hex
hex-string [ offset offset length length | partial ]
options. If you do not
specify the
offset
,
length
, or
partial
parameter, a packet matches a rule if the option
content starts with the hexadecimal number.
•
To match an ASCII string, specify the
option option-code ascii ascii-string
[ offset offset | partial ]
options. If you do not specify the
offset
or
partial
parameter, a packet matches a rule if the option content starts with the ASCII string.
Examples
# Configure match rule 1 for DHCP user class exam to match DHCP requests in which the hardware
address is six bytes long and begins with 0094 .
<Sysname> system-view
[Sysname] dhcp class exam
[Sysname-dhcp-class-exam] if-match rule 1 hardware-address 0094-0000-0101 mask
ffff-0000-0000
# Configure match rule 2 for DHCP user class exam to match DHCP requests that contain Option
82.
<Sysname> system-view
[Sysname] dhcp class exam
[Sysname-dhcp-class-exam] if-match rule 2 option 82
# Configure match rule 3 for DHCP user class exam . The rule matches DHCP requests in which the
highest bit of the fourth byte in Option 82 is the hexadecimal number 1 .
<Sysname> system-view
[Sysname] dhcp class exam
[Sysname-dhcp-class-exam] if-match rule 3 option 82 hex 00000080 mask 00000080
# Configure match rule 4 for DHCP user class exam . The rule matches DHCP requests in which the
first three bytes of Option 82 are the hexadecimal number 13ae92 .
<Sysname> system-view
[Sysname] dhcp class exam
[Sysname-dhcp-class-exam] if-match rule 4 option 82 hex 13ae92 offset 0 length 3
# Configure match rule 5 for DHCP user class exam . The rule matches DHCP requests in which the
Option 82 contains the hexadecimal number 13ae .
<Sysname> system-view
[Sysname] dhcp class exam
[Sysname-dhcp-class-exam] if-match rule 5 option 82 hex 13ae partial