C
HAPTER
45
| IP Routing Commands
Open Shortest Path First (OSPFv2)
– 1065 –
ip ospf hello-interval This command specifies the interval between sending hello packets on an
interface. Use the no form to restore the default value.
SYNTAX
ip ospf [ip-address] hello-interval seconds
no ip ospf [ip-address] hello-interval
ip-address - This parameter can be used to indicate a specific IP
address connected to the current interface. If not specified, the
command applies to all networks connected to the current interface.
seconds - Interval at which hello packets are sent from an interface.
This interval must be set to the same value for all routers on the
network. (Range: 1-65535)
COMMAND MODE
Interface Configuration (VLAN)
DEFAULT SETTING
10 seconds
COMMAND USAGE
Hello packets are used to inform other routers that the sending router is
still active. Setting the hello interval to a smaller value can reduce the
delay in detecting topological changes, but will increase routing traffic.
EXAMPLE
Console(config)#interface vlan 1
Console(config-if)#ip ospf hello-interval 5
Console(config-if)#
ip ospf message-
digest-key
This command enables message-digest (MD5) authentication on the
specified interface and to assign a key-id and key to be used by
neighboring routers. Use the no form to remove an existing key.
SYNTAX
ip ospf [ip-address] message-digest-key key-id md5 key
no ip ospf [ip-address] message-digest-key key-id
ip-address - This parameter can be used to indicate a specific IP
address connected to the current interface. If not specified, the
command applies to all networks connected to the current interface.
key-id - Index number of an MD5 key. (Range: 0-255)
key - Alphanumeric password used to generate a 128 bit message
digest or “fingerprint.” (Range: 1-16 characters)
COMMAND MODE
Interface Configuration (VLAN)
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