Cisco Systems 3560 Manual De Usuario

To disable default route generation, use the no default-information originate router configuration 
command. Use the no area-password or no domain-password router configuration command to disable 
passwords. To disable LSP MTU settings, use the no lsp mtu router configuration command. To return 
to the default conditions for summary addressing, LSP refresh interval, LSP lifetime, LSP timers, SFP 
timers, and PRC timers, use the no form of the commands. Use the no partition avoidance router 
configuration command to disable the output format. 

You can optionally configure certain interface-specific IS-IS parameters, independently from other 
attached routers. However, if you change some values from the defaults, such as multipliers and time 
intervals, it makes sense to also change them on multiple routers and interfaces. Most of the interface 
parameters can be configured for level 1, level 2, or both.

These are some interface level parameters you can configure:

The default metric on the interface, which is used as a value for the IS-IS metric and assigned when 
there is no quality of service (QoS) routing performed. 

The hello interval (length of time between hello packets sent on the interface) or the default hello 
packet multiplier used on the interface to determine the hold time sent in IS-IS hello packets. The 
hold time determines how long a neighbor waits for another hello packet before declaring the 
neighbor down. This determines how quickly a failed link or neighbor is detected so that routes can 
be recalculated. Change the hello-multiplier in circumstances where hello packets are lost 

prc-interval prc-max-wait 
[prc-initial-wait prc-second-wait]

(Optional) Sets IS-IS partial route computation (PRC) throttling timers.

prc-max-wait—the maximum interval (in seconds) between two 
consecutive PRC calculations. The range is 1 to 120; the default is 5.

prc-initial-wait—the initial PRC calculation delay (in milliseconds) 
after a topology change. The range is 1 to 10,000; the default is 2000.

prc-second-wait—the hold time between the first and second PRC 
calculation (in milliseconds). The range is 1 to 10,000; the default is 
5000. 

log-adjacency-changes [all]

(Optional) Set the router to log IS-IS adjacency state changes. Enter all to 
include all changes generated by events that are not related to the 
Intermediate System-to-Intermediate System Hellos, including End 
System-to-Intermediate System PDUs and link state packets (LSPs).

lsp-mtu size

(Optional) Specify the maximum LSP packet size in bytes. The range is 128 
to 4352; the default is 1497 bytes.

If any link in the network has a reduced MTU size, you must change 
the LSP MTU size on all routers in the network.

(Optional) Causes an IS-IS Level 1-2 border router to stop advertising the 
Level 1 area prefix into the Level 2 backbone when full connectivity is lost 
among the border router, all adjacent level 1 routers, and end hosts.

end 

Return to privileged EXEC mode.

Verify your entries.

copy running-config startup-config 

(Optional) Save your entries in the configuration file.