Token Ring Connections; Fddi Connections - Cisco 7000 Hardware Installation And Maintenance

Connecting Interface Cables

Token Ring Connections

Media access unit (MAU) connectors provide a direct connection between the TRIP and the ring.
Figure 3-8 shows the connections.
Figure 3-8
The speed of each Token Ring port must match the speed of the ring to which it is connected. The
default speed for all TRIP ports is 4 Mbps, which you can change to 16 Mbps on any port with the
configuration command ring-speed n, where n is the speed (4 or 16) in Mbps. Before you enable the
Token Ring interfaces, ensure that each is set for the correct speed, or it can bring the ring down. The
following sample session changes the ring speed on Token Ring port 1/2 from the default 4 Mbps to
16 Mbps:
Caution
connected, either 4 or 16 Mbps. If the port is set for a different speed, it will cause the ring to beacon,
which effectively brings the ring down and makes it inoperable.

FDDI Connections

Both single-mode and multimode connections are available and can be combined on one FIP. The
fiber-optic cable connects directly to the FIP ports. Single-mode uses separate transmit and receive
cables. You will need two single-mode cables for a single attachment connection or four cables for
a dual attachment connection. Multimode uses one integrated transmit/receive cable for each
physical interface (one for PHY A and one for PHY B). You will need one multimode cable for a
single attachment connection, and two cables for a dual attachment connection. Figure 3-14, which
shows the connections for a dual attachment connection that uses both single-mode and multimode
fiber, illustrates the types of connections used for both fiber modes. For pinout descriptions, refer to
the section "FDDI Connection Equipment" in the chapter "Preparing for Installation."
3-130 Cisco 700 Hardware Installation and Mainteneance
Token Ring Connections
7000# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
7000 (config)# int tokenring 1/2
7000 (config)# ring-speed 16
7000 (config)# ^Z
7000# copy running-config startup-config
[OK]
7000#
Each TRIP port must be configured for the same ring speed as the ring to which it is
MAU
TRIP