Cisco MGX 8850 (PXM1E/PXM45) Configuration Manual page 107

Chapter 2 Configuring General Switch Features
Table 2-7
Parameter
-holdtime
-topoChangeTimer
Step 2 Enter the dspncdp command to verify that the NCDP parameters were set properly.
M8850_LA.8.PXM.a > dspncdp
Distribution Mode
Node stratum level
Max network diameter
Hello time interval
Hold Down time interval
Topology change time interval
Root Clock Source
Root Clock Source Reason
Root Clock Source Status
Root Stratum Level
Root Priority
Secondary Clock Source
Secondary Clock Source Reason
Secondary Clock Source Status
Last Clock Source change time
Last Clock Source change reason : None
Once NCDP is enabled on your node, the best clock source and second best clock source are
automatically selected and distributed to all nodes in the network that have NCDP enabled. If no
previous NCDP clock configuration has been done, NCDP selects a root clock source that comes from
an internal oscillator. If you want the root clock source to come from an external source, use the
cnfncdpclksrc command as described in the
Chapter 9, "Switch Operating Procedures."
Note Cisco recommends using an external clock source instead of the internal oscillator.
If you want to specify the root clock source to come from an external source before you enable NCDP,
Caution
use the cnfncdpclksrc <portid> 0 command as described in the
section in
enable NCDP with the cnfncdp command, the root clock source will be the external clock you
configured, instead of the internal oscillator.
If you wish to change the BITS clock selected by NCDP, enter the cnfncdpclksrc command, as described
in the
Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
cnfncdp Command Parameters (continued)
Chapter 9, "Switch Operating Procedures."
"Configuring an NCDP Clock Source"
Description
Specifies the time interval, in milliseconds, between each PDU
configuration. The range is 47 through 60000 milliseconds.
Default = 500 milliseconds
Time interval, in milliseconds, for which the topology change
notification bit will be sent in the the configuration PDUs. The range
is from 47 through 60000 milliseconds.
Default = 500 milliseconds
: ncdp
: 3
: 20
: 500 ms
: 500 ms
: 500 ms
: internal clock
: Free Run
: ok
: unknown
: 0
: 0.0
: unknown
: unknown
: N/A
"Configuring an NCDP Clock Source"
If you run cnfncdpclksrc <portid> 0 before you
section in Chapter 9, "Switch Operating Procedures."
Configuring Clock Sources
section in
"Configuring an NCDP Clock Source"
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