Cisco Systems NPE-175, NPE-225 manual Configuring the Interface Transmission and Speed Modes

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 TypeSpeedDuplex

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RJ45	10, 100, 1000, auto	full,	half,	auto
GBIC(1)	1000, auto(2)	full,	half,	auto

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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-45media type and will be ignored if implementation is attempted.

If you change from the GBIC or SFP to the rj-45media type, you must set speed and duplex after you have executed the media-typecommand 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

Network Processing Engine and Network Services Engine Installation and Configuration

OL-4448-12 7-57