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Usage Guide:
When two layer 3 switches connected to the same segments both want to be the
“Defined layer 3 switch”, the priority will decide which one should be chosen. Normally the one
with higher priority will be elected, or the one with larger router-id number if the priorities are the
same. A layer 3 switch with a priority equal to 0 will not be elected as “Defined layer 3 switch” or
“Backup Defined layer 3 switch”.
Example:
Configure the priority of DR electing. Configure the interface vlan 1 to no election right,
namely set the priority to 0.
Switch#config terminal
Switch(config)#interface vlan 1
Switch(Config-if-Vlan1)#ip ospf priority 0
1.6.3.27 ip ospf retransmit-interval
Command: ip ospf [<ip-address>] retransmit-interval
<time>
no ip ospf [<ip-address>] retransmit-interval
Function:
Specify the retransmit interval of link state announcements between the interface and
adjacent layer 3 switches. The “
no ip ospf [<ip-address>] retransmit-interval
” command
restores the default value.
Parameter: <ip-address>
is the interface IP address show in dotted decimal notation.
<time>
is the retransmit interveral of link state announcements between the interface and
adjacent layer 3 switches, shown in seconds ang raning between 1
～
65535.
Default:
Default retransmit interval is 5 seconds.
Command Mode:
Interface Mode.
Usage Guide:
When a layer 3 switch transmits LSA to its neighbor, it will maintain the link state
announcements till confirm from the object side is received. If the confirm packet is not received
within the interval, the LSA will be retransmitted. The retransmit interval must be larger than the
time it takes to make a round between two layer 3 switches.
Example:
Configure the LSA retransmit interval of interface vlan 1 to 10 seconds.
Switch#config terminal
Switch(config)#interface vlan 1
Switch(Config-if-Vlan1)#ip ospf retransmit-interval 10
1.6.3.28 ip ospf transmit-delay
Command: ip ospf [<ip-address>] transmit-delay <time>
no ip ospf [<ip-address>] transmit-delay
Function:
Set the transmit delay value of LSA transmitting; the “
no ip ospf [<ip-address>]
transmit-delay
” restores the default value.
Parameter: <ip-address>
is the interface IP address show in dotted decimal notation.
<time>
is the transmit delay value of link state announcements between the interface and