Chapter 5
Setup and Configuration
RUGGEDCOM ROX II
User Guide
534 Configuring a Routing Interface
Parameter Description
Dead Interval Default: 40
The time before considering a router dead (in seconds).
Number of Hellos Per Second The number of times a hello message can be sent within one second.
4. On the Interface Parameters form, configure the following parameter(s) as required:
NOTE
Link detection is enabled automatically for active network interfaces. It makes sure the appropriate
routing daemon is notified when an interface goes down and stops advertising subnets associated
with that interface. The routing daemon resumes advertising the subnet when the link is restored.
This allows routing daemons to detect link failures more rapidly, as the router does not have to
wait for the dead interval to time out. Link detection also causes redistributed routes to start and
stop being advertised based on the status of their interface links.
NOTE
The link cost determines which route to use when multiple links can reach a given destination.
By default, OSPF assigns the same cost to all links unless it is provided with extra information
about the links. Each interface is assumed to be 10 Mbit, unless otherwise specified by the Auto-
Cost Bandwidth parameter set for the interface. For more information about the Auto-Cost
Bandwidth, refer to Section 5.38.1, “Configuring Costing for Routable Interfaces”.
The default OSPF reference bandwidth for link cost calculations is 100 Mbit. The reference
bandwidth divided by the link bandwidth gives the default cost for a link, which by default is 10. If a
specific bandwidth is assigned to each link, the costs take this into account.
Link costs can be assigned manually under OSPF to each routable interface. This should be done
when the speed of the link should not be used as the method for choosing the best link.
Parameter Description
Authentication Type Synopsis: message-digest, null
The authentication type on this interface.
Link Cost The link cost. If not set, the cost is based on calculation of reference bandwidth divide by
interface bandwidth.
Hello Interval Default: 10
The time (in seconds) between sending hello packets.
priority Default: 1
Priority of interface.
Passive Interface Default: true
Whether an interface is active or passive. Passive interfaces do not send LSAs to other
routers and are not part of an OSPF area.
Retransmit Interval Default: 5
Time (in seconds) between retransmitting lost link state advertisements.
Transmit Delay Default: 1
The link state transmit delay (in seconds).
5. Click Commit to save the changes or click Revert All to abort. A confirmation dialog box appears. Click OK
to proceed.
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