System information

BSR 64000 Configuration and Management Guide
10-12
Use the isis hello-interval command in Interface Configuration mode to specify the
length of time between hello packets that the BSR sends on either the Level 1 or Level
2 IS-IS router interface, as shown below:
MOT(config-if)#isis hello-interval <seconds> {level-1 | level-2}
where:
seconds is the ISIS hello interval.
level-1 is for Level 1 IS-IS routing.
level-2 is for Level 2 IS-IS routing.
The hello interval can be configured independently for Level 1 and Level 2, except on
serial point-to-point interfaces. (Because there is only a single type of hello packet
sent on serial links, it is independent of Level 1 or Level 2.) Specify an optional level
for X.25, and Frame Relay multiaccess networks.
Specifying the Advertised Hello Multiplier
Use the isis hello-multiplier command in Interface Configuration mode to specify the
the number of Intermediate System-to-Intermediate System (IS-IS) hello packets a
neighbor can miss before the BSR determines the adjacency between the BSR
interface and the neighbor is down, as shown below:
MOT(config-if)#isis hello-multiplier <n>
where:
n is the number of missing hello packets from 1 to 65535.
Setting the Advertised CSNP Interval
Complete Sequence Number PDUs (CSNPs) hold a complete list of all LSPs in the
IS-IS routing database. CSNPs are sent periodically on all links, and the receiving
systems use the information in the CSNP to update and synchronize their LSP
databases. The designated router multicasts CSNPs on broadcast links in place of
sending explicit acknowledgments for each LSP.