Allied Telesis AT-S99 - Manual (Page 142)

Chapter 5: Configuring AT-CM and AT-CV Media Converter Line Cards
142
Auto negotiate
Manual negotiate
Full
Half
Hundred Base <100Base-TX>
Ten Base <10Base-T>
These selections control the speed and duplex mode
settings of the twisted pair ports on the AT-CM Line Cards.
The Auto negotiate setting, the default setting, activates
IEEE 802.1u Auto-Negotiation which configures the speed
and duplex mode automatically.
The Manual negotiate setting deactivates Auto-Negotiation
on a port so that the parameters can be set manually.
Selecting this option displays additional settings.
The Full and Half settings establish the duplex mode of the
port, which can be either full-duplex or half-duplex.
The Hundred Base and Ten Base selections set a port’s
speed.to 100 or 10 Mbps, respectively.
Here are guidelines for setting the speed or duplex mode on
a port:
ˆ If the network device connected to a port on a line card
does not support Auto-Negotiation and has a fixed
duplex mode of full duplex, disable Auto-Negotiation on
the port and set the speed and duplex mode manually to
avoid a duplex mode mismatch.
ˆ To operate at 1000 Mbps, the twisted pair port on the
AT-CM2KOS Line Card has to be set to Auto-
Negotiation. You can not manually set the port to 1000
Mbps.
MDI
MDIX When the twisted pair port is set to Auto-Negotiation, the
wiring configuration is set automatically with Auto-MDI/
MDIX. When Auto-Negotiation is disabled, the MDI/MDIX
setting is manually controlled with these two selections.
Ingress Rate Limit
Egress Rate Limit These selections control the flow of network traffic to and
from the ports on the AT-CM Line Cards. The rate limits,
which are in kilobits and megabits per second, can be
applied separately to the two ports on the line cards. Rate
limits are used for storm prevention and to protect against
the formation of bottlenecks in a network topology.
The Ingress Rate Limit controls the number of bits per
second a port accepts from the device connected to it. The
port discards any frames exceeding the limit. For example,
an ingress rate limit of 128k limits a port to no more than 128
kilobits per second in traffic flow from its network device.
Traffic above the threshold is discarded by the port.
Table 16. Port Configuration Menu for Both Fiber Optic Ports and Twisted Pair Ports
Setting Description