C H A P T E R 6 Configuring Ports
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To turn on RED, use this command:
enable red port <portnumber>
To configure the probability at which you want random early
detection to drop packets, use this command:
configure red drop-probability <percent>
The percentage range is 0 - 100.
Turning Off Auto-negotiation for a GBIC Port
In certain interoperability situations, it is necessary to turn auto-
negotiation off on a GBIC. Even though these ports run only at full
duplex and gigabit speeds, the command that turns off auto-
negotiation must still include the duplex setting.
This example turns auto-negotiation off for port 4 (a GBIC Mbps
Ethernet port):
configure ports 4 auto off duplex full
Jumbo Frames
Jumbo frames are Ethernet frames that are larger than the allowable
maximum size of 1522 bytes, including four bytes used for the
cyclic redundancy check (CRC). The switch supports switching and
routing of jumbo frames at wire-speed on all ports.
Jumbo frames are used between endstations that support larger
frame sizes for more efficient transfers of bulk data. Both
endstations (and all the devices in the path) involved in the transfer
must be capable of supporting jumbo frames.