ES4710BD 10 Slots L2/L3/L4 Chassis Switch

Default: The default HELLO-packet-sending interval is 10 seconds.

Command mode: Interface Mode

Usage Guide: The HELLO packet is a most common packet sent to neighboring layer 3 switches regularly for discovering and maintaining the neighborhood and the election of DR and BDR. The hello-intervalvalue set will be written to the HELLO packet and send with it. Smaller hello-intervalenables faster discovery of network topology changes and incurs greater routing overhead. For OSPF protocol to run properly, the hello-intervalparameter between the interface and the neighboring layer 3 switch must be the same.

Example: Setting the HELLO-packet-sending interval of interface vlan1 to 20 seconds. Switch(Config-If-Vlan1)#ip ospf hello-interval 20

Related command: ip ospf dead-interval

18.4.2.2.11 ip ospf passive-interface

Command: ip ospf passive-interface no ip ospf passive-interface

Function: Sets an interface to receive OSPF packets only, the “no ip ospf passive-interface”command cancels the setting.

Default: The interface receives/sends OSPF packets by default.

Command mode: Interface Mode

Example: Setting Ethernet interface vlan1 to receive OSPF packet only. Switch(Config-If-Vlan1)#ip ospf passive-interface

18.4.2.2.12 ip ospf priority

Command: ip ospf priority <priority> no ip ospf priority

Function: Set the priority of the interface in “designated layer 3 switch” (DR) election; the “no ip ospf priority” command restores the default setting.

Parameters: < priority> is the priority value, ranging from 0 to 255.

Default: The priority of the interface when electing designated layer 3 switch is 1.

Command mode: Interface Mode

Usage Guide: When two layer 3 switches in the same network segment want to be the “designated layer 3 switch” (DR), the DR is decided by the priority value, the switch with higher priority becomes the DR; if priority values are equal, the switch with the larger router-id is selected. When a layer 3 switch has a priority value of 0, it will not be elected to be either “designated layer 3 switch” or “backup designated layer 3 switch”.

Example: Configuring the priority of the interface when electing a designated layer 3 switch (DR) and excluding interface vlan1 from the election, i.e., set the priority to 0.

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Accton Technology ES4710BD manual Ip ospf passive-interface, Ip ospf priority, Related command ip ospf dead-interval