469
Default:
The default dead interval is 40 seconds (normally 4 times of the hellow-interval).
Command Mode:
Interface Mode
Usage Guide:
If no HELLO data packet received after the
dead-interval
period then this
layer 3 switch is considered inaccessible and invalid. This command modifies the dead
interval value of neighboring layer 3 switch according to the actual link state. The set
dead-interval
value is written into the Hello packet and transmitted. To ensure the normal
operation of the OSPF protocol, the dead-interval between adjacent layer 3 switches
should be in accordance or at least 4 times of the
hello-interval
value
Example:
Switch#config terminal
Switch(config)#interface vlan 1
Switch(Config-if-Vlan1)#ip ospf dead-interval 80
14.6.3.21 ip ospf disable all
Command: [no]ip ospf disable all
Function:
Stop OSPF group process on the interface
Command Mode:
Interface Mode
Usage Guide:
This command resets the network area command and stops group
process on specific interface.
Example:
Switch#config terminal
Switch(config)#interface vlan 1
Switch(Config-if-Vlan1)#ip ospf disable all
14.6.3.22 ip ospf hello-interval
Command: ip ospf [<ip-address>] hello-interval
<time>
no ip ospf [<ip-address>] hello-interval
Function:
Specify the hello-interval on the interface; the “
no ip ospf [<ip-address>]
hello-interval
” restores the default value
Parameter: <ip-address>
is the interface IP address shown in dotted decimal notation;
<time>
is the interval sending HELLO packet, shown in seconds and ranging between
1
~
65535
Default:
The hello-interval on the interface is 10 seconds
Command Mode:
Interface Mode
Usage Guide:
HELLO data packet is the most common packet which is periodically sent
to adjacent layer 3 switch to discover and maintain adjacent relationship, elect DR and
BDR. The user set
hello-interval
value will be written into the HELLO packet and
transmitted. The less the
hello-interval
value is, the sooner the network topological