Hi Saku, all,
In order to route traffic to internet VRF one can use either default route
pointing at Internet VRF or FBF to dictate which table will be used to perform
the lookup.
Each of these comes with a certain performance tax and I’d like to figure out
which method would be faster two lookups or FBF and one lookup?
Reading the TRIO papers the lookup “workflow” consists of all the features
enabled and the complexity of the workflow dictates how many lookups into
RLDRAM are necessary. And I believe that the overall lookup performance
basically boils down to how many memory lookups are needed per workflow.
It could be that the queries to RLDRAM are bundled while the workflow is in
progress and at the end the RLDRAM is queried only once
maybe even in a parallel fashion(remember there are 4 phy mem blocks), to
retrieve all the info needed to modify the packet header or yield the egress LC.
However this can't be done if the workflow requires some information from
RLDRAM in order to complete,
in that case RLDRAM would have to be accessed multiple times during the
workflow waiting for data to be retrieved from RLDRAM and that would increase
the lookup time significantly.
I'd like to understand the lookup performance vs. functionality trade-off on
TRIO chipset and I wasn't able to find any info unfortunately.
adam
Adam Vitkovsky
IP Engineer
T: 0333 006 5936
E: [email protected]
W: www.gamma.co.uk
This is an email from Gamma Telecom Ltd, trading as “Gamma”. The contents of
this email are confidential to the ordinary user of the email address to which
it was addressed. This email is not intended to create any legal relationship.
No one else may place any reliance upon it, or copy or forward all or any of it
in any form (unless otherwise notified). If you receive this email in error,
please accept our apologies, we would be obliged if you would telephone our
postmaster on +44 (0) 808 178 9652 or email [email protected]
Gamma Telecom Limited, a company incorporated in England and Wales, with
limited liability, with registered number 04340834, and whose registered office
is at 5 Fleet Place London EC4M 7RD and whose principal place of business is at
Kings House, Kings Road West, Newbury, Berkshire, RG14 5BY.
_______________________________________________
cisco-nsp mailing list [email protected]
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
