Specifying Intervals For Sending Is-Is Hello And Csnp Packets; Specifying The Is-Is Hello Multiplier; Configuring A Dis Priority For An Interface - HPE FlexNetwork HSR6800 Configuration Manual

•
Configure IP addresses for all interfaces, and make sure that all neighboring nodes are
reachable to each other at the network layer.
•
Enable IS-IS.
Specifying intervals for sending IS-IS hello and CSNP
packets
Step
Enter system view.
1.
Enter interface view.
2.
Specify the interval for
3.
sending hello packets.
Specify the interval for
4.
sending CSNP packets on
the DIS of a broadcast
network.
The interval between hello packets sent by the DIS is 1/3 the hello interval set with the isis timer
hello command.

Specifying the IS-IS hello multiplier

If a neighbor receives no hello packets from the router within the advertised hold time, it considers
the router down and recalculates the routes. The hold time is the hello multiplier multiplied by the
hello interval.
On a broadcast link, Level-1 and Level-2 hello packets are advertised separately. You must set a
hello multiplier for each level.
On a P2P link, Level-1 and Level-2 hello packets are advertised in P2P hello packets. You do not
need to specify Level-1 or Level-2.
To specify the IS-IS hello multiplier:
Step
Enter system view.
1.
Enter interface view.
2.
Specify the number of hello packets a
3.
neighbor must miss before declaring
the router is down.

Configuring a DIS priority for an interface

On a broadcast network, ISIS must elect a router as the DIS at a routing level. You can specify a DIS
priority at a level for an interface. The greater the interface's priority, the more likely it becomes the
DIS. If multiple routers in the broadcast network have the same highest DIS priority, the router with
the highest MAC address becomes the DIS.
To specify a DIS priority for an interface:
Command
system-view
interface interface-type
interface-number
isis timer hello seconds [ level-1
| level-2 ]
isis timer csnp seconds [ level-1
| level-2 ]
Command
system-view
interface interface-type
interface-number
isis timer holding-multiplier value
[ level-1 | level-2 ]
140
Remarks
N/A
N/A
Optional.
10 seconds by default.
Optional.
10 seconds by default.
Remarks
N/A
N/A
Optional.
3 by default.