Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual page 206

JUNOS 10.1 Network Interfaces Configuration Guide
in multiplexed mode (using the
level, as described in the JUNOS System Basics Configuration Guide).
If the link partner does not support autonegotiation, configure either Fast Ethernet
port manually to match its link partner's speed and link mode. When the link mode
is configured, autonegotiation is disabled.
NOTE: When you manually configure Fast Ethernet interfaces on the M Series and
T Series routers, link mode and speed must both be configured. If both these values
are not configured, the router uses autonegotiation for the link and ignores the
user-configured settings.
To configure a Fast Ethernet port on the FIC to operate at 10 Mbps or 100 Mbps,
include the
For information about configuring the link mode, see "Configuring the Link
Characteristics on Ethernet Interfaces" on page 613.
Tri-Rate Ethernet Copper Interface
By default, the Tri-Rate Ethernet copper interfaces on MX Series routers operate at
1 Gbps. Tri-Rate Ethernet copper interfaces can also be configured to operate at
10 Mbps, 100 Mbps, or 1 Gbps.
NOTE: When you configure the Tri-Rate Ethernet copper interface to operate at
1 Gbps, autonegotiation must be enabled.
NOTE: Half-duplex mode is not supported on Tri-Rate Ethernet copper interfaces.
To configure a Tri-Rate Ethernet copper interface to operate at 10 Mbps, 100 Mbps,
or 1 Gbps, include the
level:
For information about configuring the link mode, see "Configuring the Link
Characteristics on Ethernet Interfaces" on page 613.
SONET/SDH Interface
You can configure the speed of SONET/SDH interfaces on next-generation SONET/SDH
Type 1 and Type 2 PICs with SFP. The speed you select is dependent upon whether
the PIC is in concatenated or nonconcatenated mode. In concatenated mode, the
136
Configuring the Interface Speed
speed statement at the
[edit interfaces fe-fpc/pic/port]
speed (10m | 100m);
speed
[edit interfaces ge-fpc/pic/port]
speed (10m | 100m | 1g);
statement at the
no-concatenate
[edit interfaces fe-fpc/pic/port]
statement at the
[edit interfaces ge-fpc/pic/port]
hierarchy
[edit chassis]
hierarchy level:
hierarchy