I understand why Unicast flooding occurs due to asymmetric routing. But what is the BEST recommendation to deal with the issue assuming I am not going to re-architect my network.
1) Raise the bridge table timeout to 4 hours? - What are the downsides? Possibly filling the cam table?
2) Lower the arp table timeout to 5 minutes? - downside increases cpu processing on the router
I would think a compromise would be just fine as well. 10 minutes on the bridge and arp table? On a stable network arp's every 10 minutes should not be that cpu intensive.
Also, why not make the arp timer lower than the bridge timer. Than you are assured to 're-arp' before the bridge timer expires.
I am looking for some discussion on setting the timers. I have read all the links that say why this happens and to set the 2 timers to be equal. I cannot find any information on the pros and cons of messing with the timers.