User Manual
Table Of Contents
- Contents
- Figures
- Tables
- Preface
- Section I
- Basic Operations
- Chapter 1
- Basic Switch Parameters
- Chapter 2
- Port Parameters
- Chapter 3
- SNMPv1 and SNMPv2c
- Chapter 4
- MAC Address Table
- Chapter 5
- Static Port Trunks
- Chapter 6
- Port Mirroring
- Section II
- Advanced Operations
- Chapter 7
- File System
- Chapter 8
- File Downloads and Uploads
- Chapter 9
- Event Logs and the Syslog Client
- Chapter 10
- IGMP Snooping
- Section III
- SNMPv3
- Chapter 11
- SNMPv3
- Configuring the SNMPv3 Protocol
- Enabling or Disabling SNMP Management
- Configuring the SNMPv3 User Table
- Configuring the SNMPv3 View Table
- Configuring the SNMPv3 Access Table
- Configuring the SNMPv3 SecurityToGroup Table
- Configuring the SNMPv3 Notify Table
- Configuring the SNMPv3 Target Address Table
- Configuring the SNMPv3 Target Parameters Table
- Configuring the SNMPv3 Community Table
- Displaying the SNMPv3 Tables
- Displaying the User Table Entries
- Displaying the View Table Entries
- Displaying the Access Table Entries
- Displaying the SecurityToGroup Table Entries
- Displaying the Notify Table Entries
- Displaying the Target Address Table Entries
- Displaying the Target Parameters Table Entries
- Displaying the SNMPv3 Community Table Entries
- Section IV
- Spanning Tree Protocols
- Chapter 12
- Spanning Tree and Rapid Spanning Tree Protocols
- Section V
- Virtual LANs
- Chapter 13
- Port-based and Tagged VLANs
- Section VI
- Port Security
- Chapter 14
- 802.1x Port-based Network Access Control
- Index
Chapter 2: Port Parameters
42 Section I: Basic Operations
Back Pressure Use this parameter to set backpressure
on a port. This option only appears for
ports operating in half-duplex mode. A
port uses backpressure to control the flow
of ingress packets. Possible settings are:
Enabled - Backpressure is enabled.
Disabled - Backpressure is disabled. This
is the default.
Flow Control/Back
Pressure Limit
Use this parameter to specify the
threshold for flow control or backpressure.
The threshold is specified in cells. A cell
equals 128 bytes. The range is 1 to 7935.
The default is 7935 cells.
HOL Blocking HOL blocking sets a threshold on the
utilization of a port’s egress queue. When
the threshold for a port is exceeded, the
switch signals other ports to discard
packets to the oversubscribed port. The
threshold is specified in number of cells. A
cell is 128 bytes. The range is 1 to 8191.
The default is 682.
Broadcast Rate Limiting Use this parameter to enable or disable
ingress broadcast packet limits. Possible
settings are:
Enabled - Broadcast packet ingress rate
limiting is enabled. To set the rate limit,
use the Broadcast Rate parameter.
Disabled - Broadcast packet ingress rate
limiting is disabled. This is the default.
Broadcast Rate Use this parameter to set the broadcast
rate limit in packets per second. The
range is 0 to 262143. The default is
262143.
Table 5. Port Configuration Window
Parameter Definition