* XDP Redirect detail
@ 2022-04-16 9:43 Marco
2022-04-16 17:02 ` Toke Høiland-Jørgensen
0 siblings, 1 reply; 4+ messages in thread
From: Marco @ 2022-04-16 9:43 UTC (permalink / raw)
To: xdp-newbies
Hi
Can XDP_REDIRECT forward packets to egress interface with speed
different than ingress interface?
More precisely, if ingress interface speed is 100 Gbps and the egress
interface speed is 10 Gbps, the xdp program can be load on two
interfaces and forward traffic (using XDP_REDIRECT) between them?
Best regards
Marco
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: XDP Redirect detail
2022-04-16 9:43 XDP Redirect detail Marco
@ 2022-04-16 17:02 ` Toke Høiland-Jørgensen
2022-04-24 7:30 ` Marco
[not found] ` <CAAVAo4OaTBRHy1bhw4YGSG07-BfP6u6ybfO+cS6hr2xYiwvJCw@mail.gmail.com>
0 siblings, 2 replies; 4+ messages in thread
From: Toke Høiland-Jørgensen @ 2022-04-16 17:02 UTC (permalink / raw)
To: ctxspi, xdp-newbies
Marco <ctxspi@gmail.com> writes:
> Hi
>
> Can XDP_REDIRECT forward packets to egress interface with speed
> different than ingress interface?
>
> More precisely, if ingress interface speed is 100 Gbps and the egress
> interface speed is 10 Gbps, the xdp program can be load on two
> interfaces and forward traffic (using XDP_REDIRECT) between them?
Well, yes, it can forward packets just fine; but it'll just forward each
packet as it comes in, there's no mechanism for queueing or otherwise
rate limiting them. 10->100G is fine, of course, but in the other
direction, if you are receiving at 100Gbps line rate, you'll end up
forwarding 10 Gbps of it out the 10G interface and dropping the rest,
semi-randomly as the TX buffers overflow.
We're working on adding a queueing mechanism to XDP to help with this,
but it'll probably be a little while yet before it surfaces...
-Toke
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: XDP Redirect detail
2022-04-16 17:02 ` Toke Høiland-Jørgensen
@ 2022-04-24 7:30 ` Marco
[not found] ` <CAAVAo4OaTBRHy1bhw4YGSG07-BfP6u6ybfO+cS6hr2xYiwvJCw@mail.gmail.com>
1 sibling, 0 replies; 4+ messages in thread
From: Marco @ 2022-04-24 7:30 UTC (permalink / raw)
To: Toke Høiland-Jørgensen; +Cc: xdp-newbies
Hi Toke
Your information is very useful for me.
Thanks for your reply.
Marco
Il giorno sab 16 apr 2022 alle ore 19:02 Toke Høiland-Jørgensen
<toke@redhat.com> ha scritto:
>
> Marco <ctxspi@gmail.com> writes:
>
> > Hi
> >
> > Can XDP_REDIRECT forward packets to egress interface with speed
> > different than ingress interface?
> >
> > More precisely, if ingress interface speed is 100 Gbps and the egress
> > interface speed is 10 Gbps, the xdp program can be load on two
> > interfaces and forward traffic (using XDP_REDIRECT) between them?
>
> Well, yes, it can forward packets just fine; but it'll just forward each
> packet as it comes in, there's no mechanism for queueing or otherwise
> rate limiting them. 10->100G is fine, of course, but in the other
> direction, if you are receiving at 100Gbps line rate, you'll end up
> forwarding 10 Gbps of it out the 10G interface and dropping the rest,
> semi-randomly as the TX buffers overflow.
>
> We're working on adding a queueing mechanism to XDP to help with this,
> but it'll probably be a little while yet before it surfaces...
>
> -Toke
>
--
E' meglio coltivare GNU/Linux... tanto Windows si pianta da solo!!
^ permalink raw reply [flat|nested] 4+ messages in thread[parent not found: <CAAVAo4OaTBRHy1bhw4YGSG07-BfP6u6ybfO+cS6hr2xYiwvJCw@mail.gmail.com>]
end of thread, other threads:[~2022-04-25 7:29 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-04-16 9:43 XDP Redirect detail Marco
2022-04-16 17:02 ` Toke Høiland-Jørgensen
2022-04-24 7:30 ` Marco
[not found] ` <CAAVAo4OaTBRHy1bhw4YGSG07-BfP6u6ybfO+cS6hr2xYiwvJCw@mail.gmail.com>
2022-04-25 7:29 ` Toke Høiland-Jørgensen
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