OSPF priority id/EIGRP max routers

MrD

In OSPF areas can range from 0-65535 & process IDs can range from 1-65535. Is this correct?

I read that OSPF is scalable up to around 1000 routers, and after that IS-IS is commonly used. What about EIGRP? How scalable are we talking?

chinaman

OSPF process ID range is 1 to 65535,
OSPF area 0- 4.2 billion

Unlimeted hop count and default ospf priority range to 0 - 255 where 0 means it will not become a Designated router and 255 means elected as DR if possible you can also set a Back up DR.

You can change the ospf priority:
go to interface s0
enter ip ospf priority 0 - 255, so that it will elected as a DR

Remeber the OSPF used cost as a metric to select a best route path to a remote network.

Changing the bandwidth of the interface will modify cost of metric of OSPf or you can also used the ip ospf cost 1 - 65535.

The lower the cost the better example if you have a 100 mbps fastethernet link you will have the cost of 1 and if you have 10 mbps you will have the coast of 10 which is not good.



EIGRP range is 1 - 65535
metric used is Bandwidth and delay or K1 and K3
hop count is default like igrp (100 hop count)
255 is the maximum and the command used is metric maximum-paths.
It can also load balance unequal cost link.

To load balance in IGRP used Variance command, however no idea about the value in variance.