Cisco 7200 VXR - Manual (Page 30)

30
Configure the Interface Transmission and Speed Modes for the NPE-G1 or NPE-G2
Step 1 After changing the media type, configure the speed and transmission modes to appropriately match the new interface
characteristics. Changing the speed and duplex of an NPE-G1 Gigabit Ethernet interface is done using the speed and
duplex interface commands.
Note These commands are only applicable when using the RJ-45 media.
speed { 10 | 100 | 1000 | auto }
duplex { full | half | auto }
The following speed/duplex settings are supported:
Media Type Speed Duplex
-------------------------------------------------------
RJ45 10, 100, 1000, auto full, half, auto
GBIC(1) 1000, auto(2) full, half, auto
-------------------------------------------------------
a. If you are using the no negotiation auto command, the speed and duplex should be set to a value other than auto for
correct operation.
b. The only available speed in this mode is 1000 Mbps; there is no difference whether 1000 or auto is selected.
When using the GBIC or SFP media, there is also the additional negotiation auto command that is used to enable the
IEEE 802.1z Gigabit Ethernet (1000 Mbps) autonegotiation protocol.
Step 2 To turn the autonegotiation feature off (it is on by default), issue the interface command no negotiation auto. This is
useful for connecting to other Gigabit Ethernet equipment that does not support 802.1z autonegotiation.
Note The autonegotiation feature is not supported when using the media type rj-45 and will be ignored if implementation is
attempted.
If you change from the GBIC or SFP to the RJ-45 media type, you must set speed and duplex after you have executed
the media-type command to ensure the interface will operate in the correct mode.
The media-type GBIC or media-type SFP mode will always default to 1000 Mbps. Both full-duplex and half-duplex
operation are supported in this mode.
Debug the NPE-G1 or NPE-G2
Cisco IOS provides two commands to provide information on your interfaces: show interface GigabitEthernet 0/X (where X is
1, 2, or 3) and show controllers GigabitEthernet 0/1.
The output of the show interface command is useful for determining the current operating mode of the interface
(speed/duplex/media-type) and the current interface statistics.
The output of the show controllers command displays more information specific to the I/O controller interface. For example, it
shows the detected link status, speed, and duplex, and also determines the current status of autonegotiation and the link
partners’ abilities (if it is an autonegotiation-capable interface).
The show controllers command also displays the current operating state of the driver and the Ethernet controller hardware. The
show controllers command is a very powerful debugging aid, especially for Cisco engineers should you need help in debugging
a problem. If you have any problems with your Gigabit Ethernet interfaces, you will need to provide this information to Cisco
for analysis.