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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: PBR needing to hit the cpu?
What I think we're talking about here is not really "policy- based routing" but "policy-based forwarding", right? If so, then any nin-FIFO scheme would have to to be kicked up to the CPU, right? - ferg ps. I heard you left Cisco again. ;-) -- Tony Li <[email protected]> wrote: On Sep 17, 2005, at 8:57 PM, David Hubbard wrote: > Just curious, do most vendors' hardware need to hit the > cpu when doing policy-based routing? I found one of my > border routers' cpu's on the bad end of a DDoS but once > I turned off a not necessarily required setup to force > some outbound traffic to take a specific outbound link > via PBR, the DDoS traffic was no longer an issue. It was > only about 200 Mbit so I hadn't expected it to be an issue > but apparently it was; I was surprised when support told > me the PBR was making traffic hit the cpu. That's not at all surprising. PBR would be pretty hard to push into a hardware forwarding path. Not impossible, but certainly challenging. Tony
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