I am trying to test a custom implementation of a packet forwarding algorithm for an IPV4 router. To test the performance of my algorithm, I need the forwarding table (FIB) from a real router and a trace of the packets received by the router. I was looking at www.ripe.net and www.caida.org, but could not quite understand how to get the exact information I need. Any help from the community would be highly appreciated.
Which simulator you are using for your simulation? FIB means Forward Information Base? If that then FIB is a part of CCNx forwarding engine. In this case you can use Wireshark to examine CCNx packets.
The FIB simply creates a mapping of IP addresses to MAC address in TCAM which results in a hardware lookup for packet forwarding decision against all mappings in the FIB in one parallel iteration. Therefore, to a large extend the FIB is static and as such is only adjusted with changes in the RIB which fundamentally is used to determine packet forwarding (through routing protocol updates and convergence), which is forward to and stored in FIB (e.g., a TCAM table) for the actual forwarding. To that end, if you are using a custom packet forwarding algorithm what is more efficient and faster than the TCAM, wouldn't you be more interested in the RIB data that installs IP-to-MAC mappings in the FIB? Can you supply more information about what exactly you are trying to measure in respect to the packet forwarding please.
Kamrul and Ryan,
Thanks for taking time to answer my question.
@Kamrul - I am not using a network simulator. I am simulating the packet forwarding performance of a single node.
@Ryan - My packet forwarding engine will be implemented in hardware and as such I need test vectors that will emulate a FIB and the IP packet stream or just the IP packet headers.
My goal at the moment is to improve the performance of the packet forwarding function and not the routing function. As such the routing protocol update rate and convergence is not an optimization metric.
You can find lots of Internet traces at http://www.caida.org/data/overview/
Hello Marco,
Caida just has the internet traces. It does not have an associated RIB or FIB.
My understanding of the problem is that, if I have to simulate a address lookup function, I need to have the lookup table and the internet trace from the same router. I am open to suggestions and corrections.
Cheers
Prashant
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