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Network Processing Engine and Network Services Engine Installation and Configuration
OL-4448-12
Chapter 7 NPE-G1 and NPE-G2 Installation and Configuration Information
Configuring the Native Gigabit Ethernet Interfaces
Configuring the Interface Transmission and Speed Modes
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 or NPE-G2 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 the no autonegotiation mode is 1000 Mbps; there is no difference
whether 1000 or auto is selected.
When using the GBIC 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 rj-45 media type 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 operations are supported in this mode.
Sample Configuration for the Gigabit Ethernet Interfaces
The following shows a typical configuration for the three Gigabit Ethernet interfaces on the NPE-G1.
The same configuration would be typical for the NPE-G2 also, although the second interface would be
configured for the SFP media type. In this example, the first interface is configured for the GBIC media
type, the second interface is configured for the RJ-45 media type, and the third interface is not used.
interface GigabitEthernet0/1