H3C S7500E Series Command Manual page 410

Command Manual – IPv4 Routing
H3C S7500E Series Ethernet Switches
Parameters
value: Number of hello intervals, in the range of 3 to 1000.
level-1: Applies the number to the Level-1 IS-IS neighbor.
level-2: Applies the number to the Level-2 IS-IS neighbor.
Note:
If neither level-1 nor level-2 is specified in the command, the number applies to the
current level IS-IS process.
This command is not available in loopback interface view.
Description
Use the isis timer holding-multiplier command to configure the number of hello
intervals, within which if the interface receive no hello packets, its neighbor is
considered dead.
Use the undo isis timer holding-multiplier command to restore the default.
On an interface, the default number of hello intervals is three.
You can specify the number of hello intervals for Level-1 and Level-2 neighbors
respectively on a broadcast network. For a point-to-point link, there is only one kind of
Hello packet, so you need not specify Level-1 or Level-2.
The specified number of hello intervals is used to configure the Holddown time. If a
router receives no Hello packets from a neighbor within Holddown time, it will take the
neighbor as dead. The Holddown time can be configured differently for different routers
within an area. You can adjust the Holddown time by changing either the hello interval
or the number of Hello intervals on an interface.
Related commands: isis timer hello.
Examples
# Configure the number of Level-2 Hello intervals as 5 for interface VLAN-interface,
that is, if no Hello packet is received from the interface within 5 hello intervals, the IS-IS
neighbor is considered dead.
<Sysname> system-view
[Sysname] interface Vlan-interface 10
[Sysname-Vlan-interface10] isis timer holding-multiplier 5
Chapter 4 IS-IS Configuration Commands
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