
25-85
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 Configuration 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 structure is
discovered as well larger the cost. The ensure the normal operation of OSPF protocol the
hello-interval
parameter
between the layer 3 switches adjacent to the interface must be in accordance.
Example:
Switch#config terminal
Switch(config)#interface vlan 1
Switch(Config-if-Vlan1)#ip ospf hello-interval 20
Relevant Commands:
ip ospf dead-interval
25.33 ip ospf message-digest-key
Command:
ip ospf [<
ip-address
>] message-digest-key
<key_id>
MD5
<LINE>
no ip ospf [<
ip-address
>] message-digest-key
<key_id>
Function:
Specify the key id and value of MD5 authentication on the interface; th
e “
no ip ospf [<
ip-address
>]
message-digest-key
<key_id>
“restores the default value.