LevelOne GSW-4876 - Manual (Page 198)

C HAPTER 4 | Configuring the Switch
Quality of Service
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Note that 800 (IPv4) and 86DD (IPv6) are excluded.
A detailed listing of Ethernet protocol types can be found in RFC
1060. A few of the more common types include 0800 (IP), 0806
(ARP), 8137 (IPX).
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LLC – Link Logical Control includes the following settings:
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SSAP Address – Source Service Access Point address.
(Options: Any, Specific (0x00-0xff); Default: 0xff)
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DSAP Address – Destination Service Access Point address.
(Options: Any, Specific (0x00-0xff); Default: 0xff)
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Control – Control field may contain command, response, or
sequence information depending on whether the LLC frame type
is Unnumbered, Supervisory, or Information. (Options: Any,
Specific (0x00-0xff); Default: 0xff)
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SNAP – SubNetwork Access Protocol can be distinguished by an
OUI and a Protocol ID. (Options for PID: Any, Specific (0x00-0xffff);
Default: Any)
If the OUI is hexadecimal 000000, the protocol ID is the Ethernet
type (EtherType) field value for the protocol running on top of SNAP.
If the OUI is that of a particular organization, the protocol ID is a
value assigned by that organization to the protocol running on top
of SNAP.
In other words, if value of the OUI field is 00-00-00, then value of
the PID will be etherType (0x0600-0xffff), and if value of the OUI is
other than 00-00-00, then valid value of the PID will be any value
from 0x0000 to 0xffff.
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IPv4 – IPv4 frame type includes the following settings:
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Protocol – IP protocol number. (Options: Any, UDP, TCP, or
Other (0-255))
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Source IP – Source IP address. (Options: Any, Specific)
To configure a specific source IP address, enter both the address
and mask format. The address and mask must be in the format
x.y.z.w where x, y, z, and w are decimal numbers between 0
and 255. When the mask is converted to a 32-bit binary string
and read from left to right, all bits following the first zero must
also be zero
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IP Fragment – Indicates whether or not fragmented packets
are accepted. (Options: Any, Yes, No; Default: Any)
Datagrams may be fragmented to ensure they can pass through
a network device which uses a maximum transfer unit smaller
than the original packet’s size.
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DSCP – Diffserv Code Point value. (Options: Any, specific value
of 0-63, BE, CS1-CS7, EF or AF11-AF43, or Range;
Default: Any)