Reference Guide
debug isis spf-triggers
Enable debugging on the events that triggered IS-IS shortest path first (SPF) events for debugging purposes.
S4820T
Syntax
debug isis spf-triggers
To turn off debugging, use the no debug isis spf-triggers command.
Command Modes EXEC Privilege
Command History
This guide is platform-specific. For command information about other platforms, refer to the 
relevant 
FTOS Command Line Reference Guide
.
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
Version 8.3.11.1 Introduced on the Z9000.
Version 6.3.1.0 Introduced.
debug isis update-packets
Enable debugging on link state PDUs (LSPs) that a router detects.
S4820T
Syntax
debug isis update-packets [interface]
To turn off debugging, use the no debug isis update-packets [interface] 
command.
Parameters
interface
(OPTIONAL) Identifies the interface type slot/port as one of the 
following:
• For a 40-Gigabit Ethernet interface, enter the keyword 
fortyGigE then the slot/port information.
• For a Gigabit Ethernet interface, enter the keyword 
GigabitEthernet the slot/port information.
• For a Port Channel interface, enter the keywords port-
channel
 then a number. The range is from 1 to 128.
• For a 10-Gigabit Ethernet interface, enter the keyword 
TenGigabitEthernet then the slot/port information.
• For a VLAN, enter the keyword vlan then a number from 1 to 
4094.
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