IBM 8275, User Manual

Page: 16 / 110

802.3x Flow Control
The 8275-416 supports the 802.3x flow control, which, when enabled allows the
transmission of data frames to be inhibited for a specified period of time. The
default for 802.3x flow control is
Disabled . 802.3x flow control is valid only when the
port is in full duplex mode.
Broadcast Storm Recovery
The 8275-416 detects broadcast storms and automatically blocks broadcast traffic
to minimize the impact of the broadcast storm on the rest of the network. You can
enable or disable this function at a switch level. If broadcast storm recovery is
enabled, each port will monitor incoming broadcast traffic. If the broadcast traffic
exceeds 20 percent of the port speed, the broadcast traffic on this port is blocked
until the broadcast traffic returns to 20 percent or below port speed. The default for
broadcast storm recovery is
Disabled .
Address Aging
An address recognized by the switch is removed from the port lookup tables after a
period of time if no frames have been received from that address. The default value
for the aging period is 300 seconds (5 minutes), but it can be changed by the user.
The time values range from 10 seconds to 1000000 seconds.
If a port lookup table is full and a frame is received with a new address that needs
to be added to the table, the frame is sent multicast.
Management and User Interfaces
The network administrator has a choice of these easy-to-use management
methods:
v
A VT100 terminal interface allows the network administrator to fully manage the
8275-416 using a standard terminal or terminal emulator connected over the
network using Telnet or connected to the 8275-416 ’s serial port (EIA 232).
“Chapter 2. Accessing the 8275-416” on page 11 describes how to access the
8275-416 using this interface and “Chapter 4. Using the Terminal Interface” on
page 25 instructs you about using this interface.
v
A Web-based interface enables you to manage the 8275-416 through standard
Web browsers. There must be a physical path between the Web browser and the
8275-416 over the Ethernet network to use this method of connectivity.
“Chapter 2. Accessing the 8275-416” on page 11 describes how to access the
8275-416 using this interface and “Chapter 5. Using the Web Interface” on
page 61 instructs you about using this interface.
v
The 8275-416 has a Simple Network Management Protocol (SNMP) agent that
the network administrator can access with a standard Network Manager. The
following MIBs (Management Information Base) are supported:
– MIB II (RFC 1213)
– 8275-416 Enterprise MIB
– RMON MIB (RFC 1757)
– Bridge MIB (RFC 1493)
– IEEE 802.3 Ethernet (RFC 1643)
v
8275-416 interoperates with the following SNMP Managers:
– Any standard MIB Browser (SNMP V1)
2
8275-416 User’s Guide