Setting The Csnp Interval; Configuring Hello Packet Parameters - Juniper IGP - CONFIGURATION GUIDE V11.1.X Configuration Manual

JUNOSe 11.0.x IP, IPv6, and IGP Configuration Guide
For example, if you set the IS-IS reference bandwidth to 50,000,000, the default
metric for a 10-Mbps interface is calculated as 5. Interfaces with lower bandwidths
have higher default metrics than this interface. Similarly, links with higher bandwidths
have lower default metrics than this interface.
reference-bandwidth

Setting the CSNP Interval

You can set the advertised complete sequence number PDU (CSNP) interval for an
IS-IS interface.
isis csnp-interval

Configuring Hello Packet Parameters

You can set the hello interval and the hello multiplier for IS-IS hello packets.
isis hello-interval
isis hello-multiplier
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Configuring IS-IS Interface-Specific Parameters
Use to set a reference bandwidth from which a default metric can be calculated
by IS-IS for interfaces without a configured metric.
Example
host1(config-router)#reference-bandwidth 100000000
Use the no version to remove the reference bandwidth. When you do so, the
default metric reverts to 10.
See reference-bandwidth
Use to configure the isis csnp-interval level for a specified interface. The level
can be configured independently for level 1 and level 2.
For LAN interfaces: the default value is 10 seconds, which you probably do not
need to change. For WAN interfaces: the default value is 0 seconds or disabled.
On point-to-point subinterfaces use isis csnp-interval with the isis mesh-group
command.
Completed sequence number PDUs are sent by the designated router to maintain
database synchronization.
Example
host1(config-if)#isis csnp-interval 30 level-1
Use the no version to restore the default value.
See isis csnp-interval