Specifications

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Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
OL-1166-04
Chapter 2 Cisco IGX 8400 Series Cards
Universal Frame Module
UFM-U Configuration
Because of hardware constraints, the UFM-U does not permit random combinations of speeds across
active ports. Configuring active ports on the UFM-U requires that you use certain specified
combinations (called modes) of maximum rates on these active ports.
Note Specifying the maximum speed for active ports requires careful planning, so read the following
information before attempting to configure your UFM-U active ports. To specify active ports and the
maximum speed allowed on each active port, see the “Initial Configuration of the UFM-U” section on
page 2-54.
Active ports on the UFM-U are grouped into port groups, which are indicated by alphabetic names. For
example, Group A consists of ports 1 through 4 on the V.35 and X.21 back cards, and ports 1 and 2 on
the HSSI back card. Group B consists of ports 5 through 8 on the V.35 and X.21 back cards, and ports
3 and 4 on the HSSI back card. Group C consists of ports 9 through 12 on the V.35 and X.21 back cards;
the HSSI back card does not have a Group C.
Initial Configuration of the UFM-U
Timesaver Specify your desired mode before you add connections to the card to avoid having to delete some or all
of your connections and down your active ports before changing the mode. For information on changing
the mode, see the “Configuring UFM-U Modes” section on page 2-56.
To configure your UFM-U on initial power-on of the module, use the following procedure:
Step 1 Select the desired mode with the switch software cnfmode command.
Note The UFM-U is initially set to mode 1 at card power-on.
Step 2 Select the appropriate mode for the card, based on desired maximum throughputs for each port group.
Step 3 Configure port speeds with the switch software cnfport command. For each port to be activated, set the
port speeds at or below the maximum throughput shown in Table 2-34 and Table 2-35.
Step 4 Activate the appropriate ports for each port group with the switch software upport command.
Step 5 Add connections to the UFM-U with the switch software addcon command.
Calculating Maximum Throughput on the UFM-U
When configuring your active ports and selecting your mode, remember the following two rules:
• The maximum continuous throughput on the UFM-U card cannot exceed 16 Mbps.
• The maximum throughput per port group cannot exceed 8 Mbps.
When calculating your maximum throughput, you must add the maximum bit rate for each port in the
port group to find the maximum group throughput before calculating the maximum throughput for the
card.