nanog mailing list archives
Re: PBR needing to hit the cpu?
From: Tony Li <tony.li () tony li>
Date: Sat, 17 Sep 2005 23:40:20 -0700
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
Current thread:
- PBR needing to hit the cpu? David Hubbard (Sep 17)
- Re: PBR needing to hit the cpu? Tony Li (Sep 17)
- Re: PBR needing to hit the cpu? rafi-nanog (Sep 18)
- Re: PBR needing to hit the cpu? Tony Li (Sep 18)
- Re: PBR needing to hit the cpu? rafi-nanog (Sep 18)
- Re: PBR needing to hit the cpu? Richard A Steenbergen (Sep 18)
- Re: PBR needing to hit the cpu? Sean Figgins (Sep 18)
- Re: PBR needing to hit the cpu? Adam Rothschild (Sep 18)
- Time Warner Outage? Brian Boles (Sep 18)
- Re: Time Warner Outage? Justin (Sep 18)
- Re: PBR needing to hit the cpu? Adam Rothschild (Sep 18)
- Re: PBR needing to hit the cpu? Lincoln Dale (Sep 18)
- Re: PBR needing to hit the cpu? Tony Li (Sep 17)
- <Possible follow-ups>
- Re: PBR needing to hit the cpu? Fergie (Paul Ferguson) (Sep 18)