Information Technology Reference
In-Depth Information
Media Problems: Token Ring
Table 6-1 outlines problems commonly encountered on Token Ring networks and offers general
guidelines for solving those problems.
Table6-1
Media Problems: Token Ring
Media Problem
Suggested Actions
Nonfunctional
Token Ring
Use the
show interfaces token
command to determine the
status of the router's Token Ring interfaces.
1.
If the status line indicates that the interface and line protocol
are not up, check the cable from the router to the MAU.
1
Make
sure that the cable is in good condition. If it is not, replace it.
2.
If you are performing a new installation, make sure that the
MAU has been properly initialized. For information on
initializing your MAU, refer to the manufacturer's
documentation.
3.
Ring speed
mismatch
1.
Check the ring speed specification on all nodes attached to the
Token Ring backbone. The ring speed configured for all
stations must be the same (either 4 Mbps or 16 Mbps). Use the
show running-config
privileged exec command to determine
which speed is specified on the router.
2.
If necessary, modify ring speed specifications for clients,
servers, and routers. On routers, use the
ring-speed
interface
configuration command to change the ring speed.
Change jumpers as needed for modular router platforms that do not
support software speed configuration. For more information about
ring speed specifications, refer to the hardware installation and
maintenance manual for your system.
