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Cisco 7200 VXR Installation and Configuration Guide
OL-5013-09
Chapter 4 Observing System Startup and Performing a Basic Configuration
Configuring a Cisco 7200 VXR Router
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 operation are supported in this mode.
Sample Configuration
The following shows a typical configuration for the three Gigabit Ethernet interfaces on the NPE-G1. 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
ip address 10.198.75.35 255.255.255.240
load-interval 30
no keepalive
duplex full
speed 1000
media-type gbic
no negotiation auto
no cdp enable
no shutdown
!
interface GigabitEthernet0/2
ip address 10.179.16.2 255.255.255.240
duplex auto
speed auto
media-type rj45
no cdp enable
no shutdown
!
interface GigabitEthernet0/3
no ip address
shutdown
duplex auto
speed auto
media-type rj45
no negotiation auto
no cdp enable
Note At the very minimum, an interface must be configured with the ip address, media-type, and speed
commands before it can be enabled using the no shutdown command. Other interface commands might
be needed, depending on the nature of the connected network.