Hitachi GR2000 Series Manual de usuario Pagina 154

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Hitachi Gigabit Router GR2000 SeriesEnhanced 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: 0255
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
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