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Hitachi Gigabit Router GR2000 Series Enhanced Version Configuration Commands, Vol. 2
1-112 GR2K-GA-0014
Ver. 07-02
Description: Specifies the operation when the packet matches the filter
condition. The
-forward option forwards matching packets and
the
-drop option discards the matching packets.
Default: Forward
Description: Specifies the upper protocol number in decimal. Upper
protocols include TCP, UDP, ICMP, and IGMP.
Default: Undefined
Range of value: 0–255
Description: Specifies the upper or lower limit of the IP user data length
(value of total packet length minus header length in bytes).
Table 1-57 shows the relationships between such upper and
lower limits and the resulting user data length. In this table,
“A” indicates the packet length excluding the header length,
and “B” indicates the IP user data length.
Default: None
Range of value: 0–65535.
Description: Specifies the value of high-order 6 bits in the TOS field and
compares with the high-order 6 bits in the TOS field of receipt
packet. The low-order 2 bits are ignored.
This parameter is used at specifying the high-order 6 bits in
the DS field of Diff-serv by the same condition with TOS field.
Table 1-57 Filtering Condition Derived from Relation between Limit Setting Parameter
and IP User Data Length
Limit Setting Parameter
Relation between Packet Length
and IP User Data Length
Filtering Condition
-payload_length_upper_limit A < or = B Match
-payload_length_upper_limit A > B Mismatch
-payload_length_lower_limit A > or = B Match
-payload_length_lower_limit A < B Mismatch
Table 1-58 Corresponding Values -tos<Value>
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
Precedence D T R Unused
The six high-order bits are specified.
D = delay T = throughput R = reliability