I know that I can change my anti-replay window size but don't know that reasonable numbers or what impact on resource will result by upping the windows. VoIP generates lots of packets so I am guessing the window size might need to be larger rather than smaller Any suggestions
I wouldnt think expanding the window size will have any significant impact on resources. The only resource impacted is memory, since it'll have to remember a larger range of sequence numbers; but I dont think this is a large impact.
You cn go from the default 64 to say 200 if that makes any diff, and increase further.
If your underlying n/w has re-ordering/drop issues due to multiple paths (or LLQ for voip), then increasing the window size will postpone replay error drops. If at 200, you still have drops - say the low priority is still getting dropped, you will have to increase the window further.
bottomline is, there is no recommended value as such. Will be a trial-error, based on the particular n/w scenario,
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