SMC Networks SMC6724L3 manual 200

CONFIGURING THE SWITCH

interface when estimating this delay. Set the transmit delay according to link speed, using larger values for lower-speed links.

-The transmit delay must be the same for all routers in an autonomous system.

-On slow links, the router may send packets more quickly than devices can receive them. To avoid this problem, you can use the transmit delay to force the router to wait a specified interval between transmissions.

•Retransmit Interval – Sets the time between resending link-state advertisements. (Range: 1-65535 seconds; Default: 1)

-A router will resend an LSA to a neighbor if it receives no acknowledgment. The retransmit interval should be set to a conservative value that provides an adequate flow of routing information, but does not produce unnecessary protocol traffic. Note that this value should be larger for virtual links.

-Set this interval to a value that is greater than the round-trip delay between any two routers on the attached network to avoid unnecessary retransmissions.

•Hello Interval – Sets the interval between sending hello packets on an interface. (Range: 1-65535 seconds; Default: 10)

-This interval must be set to the same value for all routers on the network.

-Using a smaller Hello interval allows changes in the network topology to be discovered more quickly, but may result in more routing traffic.

•Rtr Dead Interval – Sets the interval at which hello packets are not seen before neighbors declare the router down. This interval must be set to the same value for all routers on the network. (Range: 1-65535 seconds; Default: 40, or 4 times the Hello Interval)

•Cost – Sets the cost of sending a packet on an interface, where higher values indicate slower ports. (Range: 1-65535; Default: 1)

-This router uses a default cost of 1 for all ports. Therefore, if you install a Gigabit module, you need to reset the cost for all of the 100 Mbps ports to some value greater than 1.

-Routes are subsequently assigned a metric equal to the sum of all metrics for each interface link in the route.

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