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Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded ICMP errors from offending packet

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On 31.10.2016 20:25, Tom Herbert wrote:
> The normal hash for TCP or UDP using ECMP is over <protocol, srcIP,
> dstIP, srcPort, dstPort>. For an ICMP packet ECMP would most likely be
> done over <protocol, srcIP, dstIP>. There really is no way to ensure
> that an ICMP packet will follow the same path as TCP or any other
> protocol. Fortunately, this is really isn't so terrible. The Internet
> has worked this way ever since routers started using ports as input to
> ECMP and that hasn't caused any major meltdown.

The normal hash for forwarding is without srcPort or dstPort, so the
same as ICMP and especially also because of fragmentation problematic I
don't think a lot of routers use L4 port information for ECMP either.

Bye,
Hannes

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Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded  ICMP errors from offending packet Tom Herbert <tom@herbertland.com> - 2016-10-28 00:40 +0200
  Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded ICMP errors from offending packet Jakub Sitnicki <jkbs@redhat.com> - 2016-10-28 10:40 +0200
    Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded  ICMP errors from offending packet Tom Herbert <tom@herbertland.com> - 2016-10-28 16:30 +0200
      Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded ICMP errors from offending packet Jakub Sitnicki <jkbs@redhat.com> - 2016-10-30 14:10 +0100
        Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for  forwarded ICMP errors from offending packet David Miller <davem@davemloft.net> - 2016-10-31 20:20 +0100
          Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded ICMP errors from offending packet Jakub Sitnicki <jkbs@redhat.com> - 2016-11-01 16:30 +0100
            Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for  forwarded ICMP errors from offending packet David Miller <davem@davemloft.net> - 2016-11-01 16:40 +0100
              Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded ICMP errors from offending packet Jakub Sitnicki <jkbs@redhat.com> - 2016-11-01 17:30 +0100
              Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded  ICMP errors from offending packet Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-11-01 17:30 +0100
                Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for  forwarded ICMP errors from offending packet David Miller <davem@davemloft.net> - 2016-11-01 17:40 +0100
                Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded  ICMP errors from offending packet Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-11-01 18:10 +0100
        Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded  ICMP errors from offending packet Tom Herbert <tom@herbertland.com> - 2016-10-31 20:30 +0100
          Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded ICMP errors from offending packet Jakub Sitnicki <jkbs@redhat.com> - 2016-11-01 16:50 +0100
          Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded  ICMP errors from offending packet Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-11-01 17:30 +0100
            Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded  ICMP errors from offending packet Tom Herbert <tom@herbertland.com> - 2016-11-01 17:40 +0100
              Re: [PATCH net-next 5/5] ipv6: Compute multipath hash for forwarded  ICMP errors from offending packet Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-11-01 18:00 +0100

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