Allied Telesis AT-S63 - Manual (Page 256)

Chapter 13: Classifiers
256 Section II: Advanced Operations
ˆ You cannot specify both an IP ToS value and an IP DSCP value in the
same classifier.
IP Protocol (Layer 3)
You can define a traffic flow by the following Layer 3 protocols:
ˆ TCP
ˆ UDP
ˆ ICMP
ˆ IGMP
ˆ IP protocol number
If you choose to specify a Layer 3 protocol by its number, you can enter
the value in decimal or hexadecimal format. It you choose the latter,
precede the number with the prefix “0x”.
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 Class C subnet address 149.11.11.0/24 would have the
mask “255.255.255.0.”
Observe this guideline when using these criteria:
ˆ 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 if you are filtering on the IP
address of a specific end node. A mask is required, however, when
filtering on a subnet. Identical to the source IP mask, 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 Class C subnet address
149.11.11.0/24 would have the mask “255.255.255.0.”
Observe this guideline when using these criteria: