Command Reference
OSPFv2 Commands
minimal
Indicates that the Fast Hello function is enabled to set the dead
interval to 1s.
hello-multiplier
multiplier
Indicates the number of Hello packets sent per second in the Fast
Hello function. The value ranges from 3 to 20.
Defaults
The value of dead-interval is 4 times the interval configured with the
ip ospf hello-interval
command
by default.
Command
Mode
Interface configuration mode
Usage Guide
The OSPF dead interval is contained in the Hello packet. If OSPF does not receive a Hello packet
from a neighbor within the dead interval, it declares that the neighbor is invalid and deletes this
neighbor record form the neighbor list. By default, the dead interval is four times the Hello interval. If
the Hello interval is modified
,
the dead interval is modified automatically.
When using this command to manually modify the dead interval, pay attention to the following issues:
1. The dead interval cannot be shorter than the Hello interval.
2. The dead interval must be the same on all routers in the same network segment.
OSPF supports the Fast Hello function.
After the OSPF Fast Hello function is enabled, OSPF finds neighbors and detects neighbor failures
faster. You can enable the OSPF Fast Hello function by specifying the
minimal
and
hello-multiplier
keywords and the
multiplier
parameter. The
minimal
keyword indicates that the death interval is set
to 1s
,
and
hello-multiplier
indicates the number of Hello packets sent per second. In this way, the
interval at which the Hello packet is sent decreases to less than 1s.
If the Fast Hello function is configured for a virtual link, the Hello interval field of the Hello packet
advertised on the virtual link is set to 0, and the Hello interval field of the Hello packet received on this
virtual link is ignored.
No matter whether the Fast Hello function is enabled, the death interval must be consistent and the
hello-multiplier
values can be inconsistent on routers at both ends of the virtual link. Ensure that at
least one Hello packet can be received within the death interval.
Run the
show ip ospf virtual-links
command to monitor the death interval and Fast Hello interval
configured for the virtual link.
The
dead-interval minimal hello-multiplier
and
hello-interval
parameters introduced for the Fast
Hello function cannot be configured simultaneously.
Configuration
Examples
The following example configures the interval for determining the death of the OSPF neighbor on
fastEthernet 0/1 to30seconds.
Ruijie(config)# interface fastEthernet 0/1
Ruijie(config-if-FastEthernet 0/1)# ip address
172.16.10.1 255.255.255.0
Ruijie(config-if-FastEthernet 0/1)# ip ospf dead-interval30
The following example configures the value of hello-multiplier to3.
Summary of Contents for RG-S29 Series
Page 1: ...RG S29 Series Switch RGOS Command Reference Release 11 4 1 B12...
Page 10: ...Command Reference Command Line Interface Commands Platform Description N A...
Page 93: ...Command Reference Line Commands Description...
Page 248: ...Command Reference PKG_MGMT Commands...
Page 332: ...Command Reference Protocol VLAN Commands Commands N A N A Platform Description...
Page 350: ...Command Reference Voice VLAN Commands Description...
Page 430: ...Command Reference LLDP Commands Description...
Page 467: ...Command Reference ERPS Commands Commands N A N A Platform Description N A...
Page 541: ...Command Reference IPv6 Commands Platform Description N A...
Page 914: ...Multicast Commands 1 IPv4 Multicast Routing Commands 2 IGMP Snooping Commands...
Page 1092: ...Configuration Guide SCC Commands Platforms N A...
Page 1196: ...Configuration Guide IPv6 Source Guard Commands Platform Description N A...
Page 1290: ...ACL QoS Configuration Commands 1 ACL Commands 2 QoS Commands...