On Tue, 25 Mar 2003, Seumas Macmhicean wrote:
>We are building a PE2650/PE2550/PE1650 based network usind two net
>interfaces per box. One side of each box is public facing, connected via a
>100Mb NetGear Hub. The other side is private, connected via a 1Gb NetGear
>Switch.
Which model switch?
>We have 11 boxes connected via the private network, and it is designed for
>inter-box data transfer such as backups, etc. However, on copying large
>files (>1GB) between two boxes via the private network, all other boxes on
>the network experience a crippling slowdown.
Slowdown how? CPU, disk, network, responsiveness?
CPU usage is in the low zeroes
>(0.02) on the other boxes at this time, so the slowdown is inside the kernel
>- is it being interrupted to death by the network interfaces?
Possibly, but any modern network switch acts as a multi-port bridge, so
your other boxes should not even see traffic. Does tcpdump show any
network activity? Are the boxes transferring files properly
autonegotiating speed and duplex (use mii-tool)? It may be that your
gigabit switch doesn't have much internal bandwidth.
Cheers,
Phil
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