4-11
IPv6 Diagnostic and Troubleshooting
Debug/Syslog for IPv6
operation. For example, you can send messages about routing misconfigura-
tions and other network protocol details to an external device, and later use
them to debug network-level problems.
Configuring Debug and Event Log Messaging
To specify the types of debug and Event Log messages that you want to send
to an external device:
■ Use the debug < debug-type > command to send messaging reports for the
following types of switch events:
• Events recorded in the switch’s Event Log
• IPv6 DHCPv6 client and Neighbor Discovery events
• LLDP events
■ Use the logging < severity severity-level | system-module system-module>
command to select a subset of Event Log messages to send to an external
device for debugging purposes according to:
• Severity level
• System module
Debug Command
Syntax: [no] debug ipv6 [ debug-type ]
Configures the types of IPv6 messages that are sent to Syslog
servers or other configured debug destinations, where debug-type
is any of the following event types:
(none)
all IPv6 events
dhcpv6-client < events | packets >
one of the following IPv6 client debug message types
events — DHCPv6 client events
packets — DHCPv6 client packets
nd
IPv6 neighbor discovery events
packet
all IPv6 packet messages
The no debug ipv6… form of the command stops the sending of
debug messages of the specified type.
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