xStack
®
DES-3500 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual
108
Mode
Select Permit to specify that the Switch, according to any additional rule, forwards the packets
that match the access profile added (see below).
Select Deny to specify the packets that match the access profile are not forwarded by the
Switch and will be filtered.
Access ID
Type in a unique identifier number for this access or use Auto Assign.
Type
Selected profile based on Ethernet (MAC Address), IP address or Packet Content Mask.
• Ethernet instructs the Switch to examine the layer 2 part of each packet header.
• IP instructs the Switch to examine the IP address in each frame's header.
• Packet Content Mask instructs the Switch to examine the packet header.
Priority (0-7)
This parameter is specified if you want to re-write the 802.1p default priority previously set in the
Switch, which is used to determine the CoS queue to which packets are forwarded to. Once this
field is specified, packets accepted by the Switch that match this priority are forwarded to the
CoS queue specified previously by the user.
Replace Priority with − Click the corresponding box if you want to re-write the 802.1p default
priority of a packet to the value entered in the Priority (0-7) field, which meets the criteria
specified previously in this command, before forwarding it on to the specified CoS queue.
Otherwise, a packet will have its incoming 802.1p user priority re-written to its original value
before being forwarded by the Switch.
For more information on priority queues, CoS queues and mapping for 802.1p, see the QoS
section of this manual.
Replace Dscp (0-
63)
Select this option to instruct the Switch to replace the DSCP value (in a packet that meets the
selected criteria) with the value entered in the adjacent field.
Offset
This field will instruct the Switch to mask the packet header beginning with the offset value
specified:
• value (0-15) - Enter a value in hex form to mask the packet from the beginning of the
packet to the 16th byte.
• value (16-31) - Enter a value in hex form to mask the packet from byte 16 to byte 31.
• value (32-47) - Enter a value in hex form to mask the packet from byte 32 to byte 47.
• value (48-63) - Enter a value in hex form to mask the packet from byte 48 to byte 63.
• value (64-79) - Enter a value in hex form to mask the packet from byte 64 to byte 79.
Port Number
Enter the switch port number(s) to which you wish this rule to apply.
Time Range
Enter a Time Range that will set specific times when this access rule will be implemented on the
Switch.
To view the settings of a previously correctly configured rule, click
in the Access Rule Table to view the following window:
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