How to process OSPF in FW?

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How to process OSPF in FW?

L4 Transporter

Hello,

I heard from someone in the past that control plane send ospf hello packet and data plane has routing table.

Is it correct??

OSPF issue occurred in my custom site. So I wonder it.

And what is the different between routing table and FIB?

Thanks.

1 ACCEPTED SOLUTION

Accepted Solutions

L3 Networker

Hello cheon.

The hello packets are generated on the management plane and sent out the data plane. The routing table is managed by the mangment plane, and "frequently used, or best match" routes are sent to the FIB.

The FIB(forwarding information base) is a software copy of the routes which are programmed to the TCAM for packet forwarding.  This is a simple explanation, but I hope it answers your questions.

-chadd.

View solution in original post

9 REPLIES 9

L3 Networker

Hello cheon.

The hello packets are generated on the management plane and sent out the data plane. The routing table is managed by the mangment plane, and "frequently used, or best match" routes are sent to the FIB.

The FIB(forwarding information base) is a software copy of the routes which are programmed to the TCAM for packet forwarding.  This is a simple explanation, but I hope it answers your questions.

-chadd.

Thank you very much, chadd.

I got very helpful from you answer.

L2 Linker

Hi cheon,

What was the issue you had? We have run into OSPF issues that have a lower than default hello interval. Like 2 seconds.

Hi stewart,

I had ospf issue that failed ospf hello negotiation with neighbor L3 device when FW was attacked ddos.

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