Wednesday, February 6, 2019

OSPF

I have the following:

router ospf 4

router-id 192.168.100.6

no passive-interface gigethernet 1/0/1

network 172.10.10.0 0.0.0.3 area 0

network 172.10.11.0 0.0.0.0 area 0

network 172.10.20.0 0.0.0.255 area 0

network 172.20.15.254 0.0.0.0 area 0

network 172.20.15.0 0.0.0.0 area 0

I have spent hours going over OSPF guides (I'm new to it, relatively speaking), and I'm not getting it.

Unlike regular static routes, where its [destination address/network] [subnet] [gateway/next hop], I'm not understanding the correlation.

If I have these five networks is it the same thing as saying:

[destination] 172.10.10.0 [subnet(wildcard)] 0.0.0.3 [gateway/router] 192.168.100.6 ?

Or is it [source] 172.10.10.0 [subnet] [gateway] 192.168.100.6 ?

Or is it [advertise] 172.10.10.0 0.0.0.3 on gateway 192.168.100.6 ?

I have some devices that are both in the ospf but they have static routes going elsewhere, and I'm not sure what to do since I don't know what takes precedence.

So I have a static route

ip route 10.10.10.10 255.255.255.0 [gateway]

The SOURCE point is within the listed OSPF networks on the L3 switch.

If the source network is in the OSPF listing, is it telling anything with those addresses to route through the ospf side?

Freaking confused.



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