Re: Network very very slow... was iSCSI and jumbo frames

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

RVP a écrit :
> BERTRAND Joel wrote:
> 
>> Now jumbo frames are enabled
>> ...
>> With old Realtek and MTU 1500, throughput was about 10 Mbytes/s.
>> With a new Intel adapter and jumbo frames, I obtain the same result
>> ...
>> I suppose there is somewhere a bottleneck, but where ?
> 
> 1. Are ethernet cards on either end gigabit adapters?

	Yes.

> 2. Are the cards configured as such by their respective OSes?
>    (use ifconfig -v ifname)

	Yes.

NetBSD side :
legendre:[~] > ifconfig wm0
wm0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 9000
        capabilities=7ff80<TSO4,IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx>
        capabilities=7ff80<TCP4CSUM_Tx,UDP4CSUM_Rx,UDP4CSUM_Tx,TCP6CSUM_Rx>
        capabilities=7ff80<TCP6CSUM_Tx,UDP6CSUM_Rx,UDP6CSUM_Tx,TSO6>
        enabled=0
        ec_capabilities=17<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,EEE>
        ec_enabled=2<VLAN_HWTAGGING>
        address: b4:96:91:92:77:6e
        media: Ethernet autoselect (1000baseT full-duplex)
        status: active
        inet 192.168.12.1/24 broadcast 192.168.12.255 flags 0x0
        inet6 fe80::b696:91ff:fe92:776e%wm0/64 flags 0x0 scopeid 0x1

qNAP side :
[~] # ethtool eth0
...
        Speed: 1000Mb/s
        Duplex: Full
        Port: MII
...

> 3. Is the ethernet cable between the two machines Cat-5E or
>    better (with all 8 wires)? (Performance is sometimes not up
>    to spec with some cards and mere Cat-5 cables.)
	Cat6a...

	Regards,

	JKB