Cluster Administration Troubleshooting - Digitalchina Networks DCS-3950 series Manual

6.4.1.5 debug cluster packets
Command: debug cluster packets {register|build|heartbeat} {in|out} [detail]
no debug cluster packets {register|build|heartbeat} {in|out} [detail]
Function: Enable the debugging message of cluster admin receiving and sending
packets; the 'no' form of this command disables the enabled debugging messages.
Parameter: Register displays a register packet of cluster administration. Build displays
join a cluster or delete packet from the cluster administration. Heartbeat packet for check
if cluster admin members are working properly; in parameter displays the debugging
messages related to the command or member switches receiving packets; out parameter
displays the debugging messages related to the command or member switches sending
packets.
Default: None.
Command mode：Admin Mode.
Usage Guide: Cluster packets debugging will be enabled if this command is executed,
including the keep-alive packets, the registering packets, and construction packets.
Example: Enable debugging for cluster registering packets.
Switch#debug cluster packets register in

6.4.2 Cluster administration troubleshooting

Cluster heart beat count and cluster heart beat keep alive time can be set on the
command switch. The cluster heart beat count should be no less than current cluster
heartbeat keeps alive time, or the configuration will not be available and error will be
reported.
When the private IP address pool is configured for the switch, it must be guaranteed
that the address pool configuration must not conflict with any public IP addresses.
VLAN 1 must be contained in the ALLOWED VLAN configuration if switches are
connected through the TRUNCK ports. Or switches in the cluster may be unable
to communicate with each other.
It is recommended a higher tier switch of better performance should be used as
the command switch because the load of the command switch is usually quite
high.
Routing protocols (rip, ospf, bgp) should not be enabled in VLAN 1, if cluster
commander is enabled in VLAN 1 in the command switch. Or the routing would
be looped because the cluster private management subnet would have been
broadcasted to other switches.
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