3Com Switch 7750 Configuration Guide Guide

806 CHAPTER 76: DEVICE MANAGEMENT
Enabling/Disabling
RDRAM
Using the following command, yon can enable or disable RDRAM (Rambus
Dynamic Random Access Memory) of the device.
Configuring Pause
Frame Protection
Mechanism
Pause frames, which can be utilized as packets to attack a network, are used in
traffic controlling. A switch that has pause frame protection mechanism enabled
discards the detected pause frames that are utilized to attack the network it
resides and logs these attacks in the logbuffer. If the switch experiences successive
pause frame attacks, it sends messages to the console to warn users.
c
CAUTION: Only A type cards support pause frame protection mechanism and the
related commands. A type cards include: 3C16860, 3C16861, 3C16858, and
3C16859.
Pause Frame Protection
Mechanism
Configuration Task
The following describes the configuration tasks of Pause Frame protection
mechanism.
Pause Frame Protection
Mechanism
Configuration Example
Network requirements
Enable pause frame protection mechanism on the card in Slot 7 of the switch.
Configuration procedure
1 Enter system view.
<SW7750> system-view
[SW7750]
2 Enable pause frame protection mechanism on the card seated in slot 7.
[SW7750] pause-protection enable slot 7
Configuring Layer 3
Connectivity
Detection
Introduction to layer 3
connectivity detection
The function that detects layer 3 connectivity is implemented as follows. Local
devices send ARP request packets continuously to the IP addresses of the devices
Tabl e 623 Enable/Disable RDRAM
Operation Command Description
Enter system view system-view -
Enable RDRAM of the device rdram enable Optional
By default, RDRAM is
disabled.
Disable RDRAM of the device rdram disable
Tabl e 624 Configure pause frame protection mechanism
Operation Command Description
Enter system view system-view -
Enable pause frame
protection mechanism
pause-protection enable
slot slot-number
Required
Pause frame protection
mechanism is disabled by
default.