H3C S7500 Series Ethernet Switches Command Manual

Table Of Contents
Command Manual – Routing Protocol
H3C S7500 Series Ethernet Switches Chapter 4 Integrated IS-IS Configuration Commands
4-24
Examples
# Configure Level-2 Hello packets to be sent every 20 seconds over VLAN-interface 10.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] interface Vlan-interface 10
[H3C-Vlan-interface10] isis timer hello 20 level-2
4.1.26 isis timer holding-multiplier
Syntax
isis timer holding-multiplier value [ level-1 | level-2 ]
undo isis timer holding-multiplier [ level-1 | level-2 ]
View
Interface view
Parameters
value: Number of invalid Hello packets of an IS-IS neighbor, in the range of 3 to 1,000.
level-1: Specifies the number of invalid Hello packets of a Level-1 IS-IS neighbor.
level-2: Specifies the number of invalid Hello packets of a Level-2 IS-IS neighbor.
If neither the level-1 keyword nor the level-2 keyword is specified, the command takes
effect on both level-1 and level-2 IS-IS neighbors.
Description
Use the isis timer holding-multiplier command to configure the number of invalid
Hello packets for an IS-IS neighbor. When a specified number of Hello packets are not
received from a neighbor, the neighbor will be considered as invalid.
Use the undo isis timer holding-multiplier command to resume the default
configuration.
The number of invalid Hello packets is three by default.
You can configure the time intervals of Hello packets separately for Level-1 and Level-2
peers. But for a point-to-point link, since there is only one kind of Hello packet, you need
not to specify Level-1 or Level-2.
In fact, the number of invalid Hello packets is used to configure Holddown time. If a
router receives no Hello packet from the peer router within Holddown time, it will take
the peer router as invalid. Depending on the interface configuration, the Holddown time
can be configured differently for different routers within an area. You can adjust the
Holddown time by changing either the time interval for sending Hello packets or the
number of invalid Hello packets.