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On Sun, Nov 07, 2010 at 12:24:21PM +0100, Ulrich Sp=F6rlein wrote:
> On Sat, 06.11.2010 at 23:19:33 -0700, Pyun YongHyeon wrote:
> > On Sat, Nov 6, 2010 at 2:37 AM, Ulrich Sp=F6rlein <uqs@spoerlein.net> w=
rote:
> > > Hello Pyun,
> > >
> > > On this new server, I cannot get more than ~280kByte/s up/downstream =
out of
> > > re(4) without any tweaking.
> > >
> > > re0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mt=
u 1500
> > > =A0 =A0 =A0 =A0options=3D389b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,V=
LAN_HWCSUM,WOL_UCAST,WOL_MCAST,WOL_MAGIC>
> > > =A0 =A0 =A0 =A0ether 00:21:85:63:74:34
> > > =A0 =A0 =A0 =A0inet6 fe80::221:85ff:fe63:7434%re0 prefixlen 64 scopei=
d 0x1
> > > =A0 =A0 =A0 =A0inet 46.4.12.147 netmask 0xffffffc0 broadcast 46.4.12.=
191
> > > =A0 =A0 =A0 =A0nd6 options=3D3<PERFORMNUD,ACCEPT_RTADV>
> > > =A0 =A0 =A0 =A0media: Ethernet autoselect (100baseTX <half-duplex>)
> > > =A0 =A0 =A0 =A0status: active
> > >
> >=20
> > It seems the link was resolved to half-duplex. Does link partner
> > also agree on the resolved speed/duplex?
>=20
> As this is a dedicated server in a colo hundreds of km away, I have no
> means to check this easily. Especially I cannot change the setting from
> auto-neg. Btw, linux will show a negotiated 100/full link via mii-tool.
you can always ask the guys responsible for network infrastructure
> > > # ifconfig re0
> > > re0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mt=
u 1500
> > > =A0 =A0 =A0 =A0options=3D88<VLAN_MTU,VLAN_HWCSUM>
> > > =A0 =A0 =A0 =A0ether 00:21:85:63:74:34
> > > =A0 =A0 =A0 =A0inet6 fe80::221:85ff:fe63:7434%re0 prefixlen 64 scopei=
d 0x1
> > > =A0 =A0 =A0 =A0inet 46.4.12.147 netmask 0xffffffc0 broadcast 46.4.12.=
191
> > > =A0 =A0 =A0 =A0nd6 options=3D3<PERFORMNUD,ACCEPT_RTADV>
> > > =A0 =A0 =A0 =A0media: Ethernet 100baseTX <full-duplex> (100baseTX <ha=
lf-duplex>)
> > > =A0 =A0 =A0 =A0status: active
> > >
> >=20
> > This time, it seems you used forced media configuration
> > instead of auto. It still shows duplex mismatch so it's
> > normal to see poor performance. What makes me wonder
> > is why you have duplex mismatch?
> > Did you use forced media configuration on link partner?
> > What happens when you use different switch?
>=20
> Sadly, none of these options are available to me :/
> But even 100/half should give more than enough performance, right?
no, not if the other end is 100/full. Duplex mismatch usually gives around
100-200 kB/s. I've experienced this (around 75kB/s), setting speed/duplex
manually fixed the problem.
> Uli
> _______________________________________________
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Buki
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