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Cisco VISM Installation and Configuration Guide
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
Chapter4 Configuring VISM Features
Configuring VISM Features
Step 2 Type the cnfclksrc command, slot-num.port-num, and clk-type argument values, and press Enter to
configure the PXM card clock source. Specify the arguments with the following values:
•slot-num.port-num:
–
slot-num = 7 or 8, port-num = 1 to n.
Note Ensure that you type the period with no spaces on either side, between the slot-num
argument value and the port-num argument value.
•clk-type argument values:
–
P = Primary
–
S = Secondary
–
N = Null (no external clocking source; use the PXM card’s internal crystal)
Specify the cnfclksrc command argument values according to the following rules:
•If the clock source is the external BITS clock (a T1 or E1 por t on the PXM ba ck c ar d), sp ec ify the
configuration as:
cnfclksrc 7.35 P
Note Type 7 for the slot number regardless of the PXM card’s location in the chassis. Type 35
for the port number—the BITS port is always port 35.
•If the clock source is an external signal on one of the PXM OC3 ports, specify the configuration as:
cnfclksrc 7.n P
Note Type 7 for the slot number regardless of the PXM card’s location in the chassis. The n
port parameter value is the OC3 port number in the range 1 to 4.
•If the clock source is the PXM’s internal crystal and no other clock source has been specified, do
not configure the clock source. The crystal is the automatic default.
•If you want to change the clocking source from external to the PXM card’s internal crystal, specify
the configuration as:
cnfclksrc 7.X N
Note Type 7 for the slot number regardless of the PXM card’s location in the chassis. The X
argument value is the either 35 or the OC3 port number, depending upon which is the
currently specified source. The null port number argument value cancels the previous
configuration and returns the clocking source to the default internal crystal.
•If the clock source is from a line on a VISM card, specif y t he co nfigur ation a s:
cnfclksrc y.1 P