Token Ring Interfaces
Defining a
token ring interface is almost as simple
as defining an Ethernet interface. In addition to setting the
IP address, you must specify
the correct token ring speed. All devices in a ring, including
devices like sniffers, must be configured for the same speed or the
whole ring will shut down. There is no way for a token ring device to
autosense ring speed. To set the speed, use the
ring-speed
command. The allowable speeds are 16
Mbps and 4 Mbps.
The other common configuration command for a token ring network,
early-token-release
, tells the router to release the token
as soon as it has sent its packet. The default behavior is to wait
for acknowledgment after sending packets, then release the token.
Here’s a simple token ring configuration:
interface tokenring0 ip address 10.10.14.1 255.255.255.0 ring-speed 16 early-token-release
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