User Manual

24-Port and 48-Port Gigabit Ethernet PoE+ Smart Switches with 4 SFP Ports
Manage Device Security User Manual432
• IGMP Type. If you specify the IGMP type, the IP ACL rule matches the specified
IGMP message type. Possible values are in the range 0 to 255. If this field is left
empty, it means any.
• ICMP. Select either the T
ype or Message radio button:
- If you select the T
ype radio button, note the following:
• The T
ype and Code fields are enabled only if the protocol is ICMP. Use these
fields to specify a match condition for ICMP packets:
• The IP
ACL rule matches the specified ICMP message type. Possible type
numbers are in the range from 0 to 255.
• If you specify information in the Message field, the IP
ACL rule matches the
specified ICMP message code. Possible values for the code can be in the
range from 0 to 255.
• If these fields are left empty
, it means any.
- If you select the Message radio button, select the type of the ICMP message to
match with the selected IP
ACL rule. Specifying a type of message implies that
both the ICMP type and ICMP code are specified. The ICMP message is decoded
into the corresponding ICMP type and ICMP code within the ICMP type.
The IPv4 ICMP message types are echo, echo-reply, host-redirect,
mobile-redirect, net-redirect, net-unreachable, redirect, packet-too-big,
port-unreachable, source-quench, router-solicitation, router-advertisement,
ttl-exceeded, time-exceeded, and unreachable.
• Fragments. Either select the Enable radio button to allow initial fragments (that is,
the fragment bit is asserted) or leave the default Disable radio button selected to
prevent initial fragments from being used.
This option is not valid for rules that match L4 information such as a TCP port number,
because that information is carried in the initial packet.
• Service Type. Select a service type match condition for the extended IP
ACL rule.
The possible options are IP DSCP, IP Precedence, and IP T
OS, which are alternative
methods to specify a match criterion for the same service type field in the IP header.
Each method uses a different user notation. After you make a selection, you can
specify the appropriate values:
- IP DSCP.
This is an optional configuration. Specify the IP DiffServ Code Point
(DSCP) field. The DSCP is defined as the high-order 6 bits of the service type
octet in the IP header. Enter an integer from 0 to 63. To select the IP DSCP, select
one of the DSCP keywords from the menu. To specify a numeric value, select
Other and a field displays in which you can enter numeric value of the DSCP.
- IP Precedence.
This is an optional configuration. The IP precedence field in a
packet is defined as the high-order 3 bits of the service type octet in the IP header.
Enter an integer from 0 to 7.
- IP TOS.
This is an optional configuration. The IP ToS field in a packet is defined
as all 8 bits of the service type octet in the IP header. The ToS bits value is a
hexadecimal number that is composed of numbers 00 to 09 and AA to FF. The