826 | Intermediate System to Intermediate System (IS-IS)
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debug isis update-packets 
e
Enable debugging on Link State PDUs (LSPs) that are detected by a router. 
Syntax
debug isis update-packets [interface] 
To turn off debugging, enter the no debug isis update-packets [interface] command.
Parameters
 
Command Modes
EXEC Privilege
default-information originate
e
Generate a default route into an IS-IS routing domain and controls the distribution of default 
information.
Syntax
default-information originate [always] [metric metric] [route-map map-name]
To disable the generation of a default route into the specified IS-IS routing domain, enter the no 
default-information originate [always] [metric metric] [route-map map-name] command.
Parameters
 
Defaults
Not configured.
Command Modes
ROUTER ISIS (for IPv4)
CONFIGURATION-ROUTER-ISIS-ADDRESS-FAMILY-IPV6 (for IPv6)
Command
History
interface
(OPTIONAL) Identifies the interface type slot/port as one of the following: 
• For a 1-Gigabit Ethernet interface, enter the keyword 
GigabitEthernet followed 
by the slot/port information. 
• For a Port Channel interface, enter the keyword 
port-channel followed by a 
number:
C-Series and S-Series Range: 1-128
E-Series Range: 1 to 32 for EtherScale, 1 to 255 for TeraScale and 1 to 512 for 
ExaScale. 
• For a SONET interface, enter the keyword 
sonet followed by the slot/port 
information. 
• For a 10-Gigabit Ethernet interface, enter the keyword 
TenGigabitEthernet 
followed by the slot/port information. 
• For a VLAN, enter the keyword 
vlan followed by a number from 1 to 4094.
always (OPTIONAL) Enter the keyword always to have the default route always 
advertised
metric metric (OPTIONAL) Enter the keyword metric followed by a number to assign to the 
route.
Range: 0 to 16777215
route-map 
map-name
(OPTIONAL) A default route will be generated by the routing process if the route 
map is satisfied.
Version 7.5.1.0 Introduced IPv6 ISIS support
Version 6.3.1.0 Introduced