Enable BFD for OSPF on an IPv4 VLAN Interface
About this task
BFD provides a failure-detection mechanism between two systems. Use the following procedure to enable OSPF BFD on an IPv4 VLAN interface.
Note
Enabling BFD at the application level does not establish a BFD session. To establish a BFD session, you must enable BFD globally and at the interface level.Procedure
- In the navigation pane, expand .
- Select VLANs.
- Select the Basic tab.
- Select the VLAN on which you want to enable BFD for OSPF.
- Select IP.
- Select OSPF.
- Select BfdEnable.
OSPF Field Descriptions
Use the data in the following table to use the OSPF tab.
Name |
Description |
---|---|
Enable |
Enables or disables OSPF routing on the specified VLAN. The default is false. |
HelloInterval |
Specifies the length of time, in seconds, between the transmission of hello packets. This value must be the same for all routers attached to a common network. The default is 10 seconds. After you change the hello interval values, you must save the configuration file, and then restart the switch. After the switch restarts, it restores the values and checks for consistency. |
RtrDeadInterval |
Specifies the interval used by adjacent routers to determine if the router was removed from the network. This interval must be identical on all routers on the subnet and a minimum of four times the hello interval. To avoid interoperability issues, the RtrDeadInterval value for the OSPF interface needs to match with the RtrDeadInterval value for the OSPF virtual interface. The default is 40 seconds. |
DesigRtrPriority |
Specifies the priority of this VLAN in multiaccess networks to use in the designated router election algorithm. The value 0 indicates the router is not eligible to become the designated router on this particular network. If a tie occurs, routers use their router ID as a tie breaker. The default is 1. |
Metric |
Specifies the metric for this TOS on this VLAN. The value of the TOS metric is (10^9 / interface speed). The default is 1.
|
AuthType |
Specifies the type of authentication required for the interface.
|
AuthKey |
Specifies the key (up to eight characters) when you specify simple password authentication in the VLAN AuthType variable. |
AreaId |
Specifies the OSPF area name in dotted-decimal format. The area name is not related to an IP address. You can use a suitable value for the OSPF area name (for example, 1.1.1.1 or 200.200.200.200). |
AdvertiseWhenDown |
Advertises the network even if the port is down. If true, OSPF advertises the network on this VLAN as up, even if the port is down. The default is false. After you configure a port without a link and enable AdvertiseWhenDown, it does not advertise the route until the port is active. Then, OSPF advertises the route even when the link is down. To disable advertising based on link states, disable AdvertiseWhenDown. |
IfType |
Specifies the type of OSPF interface (broadcast, NBMA, passive, or p2p). Before you change an OSPF interface type, you must first disable the interface. If the interface is an NBMA interface, you must also delete all configured neighbors. |
PollInterval |
Specifies the length of time, in seconds, between hello packets sent to an inactive OSPF router. Neighbors must use the same poll interval. |
IfMtuIgnore |
Specifies whether the VLAN ignores the MTU configuration. To allow the switch to accept OSPF DD packets with a different MTU size, enable MtuIgnore. The interface drops incoming OSPF DD packets if their MTU is greater than 1500 bytes. |
BfdEnable |
Enables Bidirectional Forwarding Detection (BFD) for OSPF. |