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Allied Telesis AT-S101 User Manual

Page 190

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Chapter 18: Classifiers

190

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IGMP

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IP protocol number

If you choose to specify the protocol by its number, you can enter the
value in decimal or hexadecimal format. It the latter, include the prefix “0x.”
The range for the protocol number is 0 (0x0) to 255 (0xFF).

Source IP Addresses (Layer 3)
Source IP Mask (Layer 3)

You can define a traffic flow by the source IP address contained in IP
packets. The address can be of a subnet or a specific end node.

You do not need to enter a source IP mask if you are filtering on the IP
address of a specific end node. A mask is required, however, when you
filter on a subnet. A binary “1” indicates the switch should filter on the
corresponding bit of the IP address, while a “0” indicates that it should not.
For example, the subnet address 149.11.11.0 would have the mask
“255.255.255.0.”

Observe this guideline when using these criteria:

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The Protocol variable must be left blank or set to IP.

Destination IP Addresses (Layer 3)
Destination IP Mask (Layer 3)

You can also define a traffic flow based on the destination IP address of a
subnet or a specific end node.

You do not need to enter a destination IP mask for an IP address of a
specific end node. A mask is required, however, when filtering on a
subnet. A binary “1” indicates the switch should filter on the corresponding
bit of the IP address while a “0” indicates that it should not. For example,
the subnet address 149.11.11.0 would have the mask “255.255.255.0.”

Observe this guideline when using these criteria:

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The Protocol variable must be left blank or set to IP.

Source Ports (Layer 4)
Destination Ports (Layer 4)

A traffic flow can be identified by a source and/or destination TCP or UDP
port number contained within the header of an IP frame. Observe the
following guidelines when using these criteria:

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The Protocol variable must be left blank or set to IP.

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A classifier cannot contain criteria for both TCP and UDP ports. You
may specify either TCP or UDP ports in a classifier, but not both.