Slow network speed on Centos5 running in VMWare 6 with bridged networking
Hi
I'm not sure why this is happening - but my CentOS5 VMWare machine with bridged networking has VERY slow networking performance when trying to access via FTP/Samba
I have a static IP LAN setup, where all my lan PC's are on the 192.168.0.x / 255.255.255.0 network and using 192.168.0.110 as gateway ( that machine is an endian firewall box that manages my 4mb ADSL connection and also acts as primary DNS server).
The VMWare box was created on a 3Ghz E8650 dual core with 4GB RAM -of which 1 GB is dedicated to the CentOS5 VM, and 40GB hdd pre-allocated to VM.
The VM networking is configured "correctly" since I am able to access internet and other IP's from this VM, but at very slow speeds. It's as if the connection is routed "outside" my LAN, over the ADSL and then back in via ADSL and not directly over the CAT5...
The VM is installed on a Vista Business host - is there something on Vista that could be causing this "choke"?
I'm not sure why this is happening - but my CentOS5 VMWare machine with bridged networking has VERY slow networking performance when trying to access via FTP/Samba
I have a static IP LAN setup, where all my lan PC's are on the 192.168.0.x / 255.255.255.0 network and using 192.168.0.110 as gateway ( that machine is an endian firewall box that manages my 4mb ADSL connection and also acts as primary DNS server).
The VMWare box was created on a 3Ghz E8650 dual core with 4GB RAM -of which 1 GB is dedicated to the CentOS5 VM, and 40GB hdd pre-allocated to VM.
The VM networking is configured "correctly" since I am able to access internet and other IP's from this VM, but at very slow speeds. It's as if the connection is routed "outside" my LAN, over the ADSL and then back in via ADSL and not directly over the CAT5...
The VM is installed on a Vista Business host - is there something on Vista that could be causing this "choke"?
Last Comment
ASKER
Hi
All firewalls and anti-virus are already disabled.
All firewalls and anti-virus are already disabled.
you said, you have "that machine is an endian firewall box that manages my 4mb ADSL connection and also acts as primary DNS server)."
when you try to access the linux host via Ip , does it slow aswell ??
or its just file copy is slow ??
if i tell you to ssh to that box via host name , does it slow to connect ??
when you try to access the linux host via Ip , does it slow aswell ??
or its just file copy is slow ??
if i tell you to ssh to that box via host name , does it slow to connect ??
ASKER
SSH *seems* fine, but because there's only basically text being sent and received, it's difficult to guage speed - also, ALL my other PC's on the lan are configured in exactly the same way, and none of them suffer the slowdown - I even have a WinXP VM machine running alongside the CentOS5 one that works perfectly (on another IP of course) - switching the XP Vm off doesn' have any effect on the speed of the CenOS Vm tho...
If I try to FTP to the CentOS box directly via IP, I also get very slow connection in both upload and download - so I don't think it's DNS related...
If I try to FTP to the CentOS box directly via IP, I also get very slow connection in both upload and download - so I don't think it's DNS related...
ASKER
PS, CentOS machine has firewall and SELinux off.
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ASKER
OK, traceroute on Cnetos Vm = 15 hops, tracert on Vista = 15 hops to www.google.com and both are relatively close ( the Host being slightly faster on all hops)
No dropped packets when pinging.
/etc/sysconfig/network-scr
# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
DEVICE=eth0
BROADCAST=192.168.0.255
HWADDR=00:0c:29:97:35:22
IPADDR=192.168.0.240
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes
GATEWAY=192.168.0.110
TYPE=Ethernet
nothing weird in messages or logs, top shows near 0 resource and mem usage.
watch also shows near 0 traffic...
No dropped packets when pinging.
/etc/sysconfig/network-scr
# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
DEVICE=eth0
BROADCAST=192.168.0.255
HWADDR=00:0c:29:97:35:22
IPADDR=192.168.0.240
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes
GATEWAY=192.168.0.110
TYPE=Ethernet
nothing weird in messages or logs, top shows near 0 resource and mem usage.
watch also shows near 0 traffic...
which version vmware have you installed ?
ASKER
6.0.2 build 59824
This version has worked for me in the past with no issues - I'm starting to think it's something on CentOS that I missed when configuring the box...
This version has worked for me in the past with no issues - I'm starting to think it's something on CentOS that I missed when configuring the box...
>>watch also shows near 0 traffic...
Are you sure?
It should have close to the same amount of traffic as Vista while you are running the tests. For a ping, you'd be getting 64bytes/sec so 480K/min, if I've done my maths correctly. A webpage will get you up to a meg extra
How about a bandwidth test - http://www.bandwidthplace.com/ run a free test, on virtual and physical and compare the results.
Are you sure?
It should have close to the same amount of traffic as Vista while you are running the tests. For a ping, you'd be getting 64bytes/sec so 480K/min, if I've done my maths correctly. A webpage will get you up to a meg extra
How about a bandwidth test - http://www.bandwidthplace.com/ run a free test, on virtual and physical and compare the results.
ok you said ftp and samba is slow
thats why i said, to download wincp
and then connect to the linux and try to transfer some file between linux and box
if this wincp works that mean you have problem with ftp and samba
but you didnot conferm me yet
thats why i said, to download wincp
and then connect to the linux and try to transfer some file between linux and box
if this wincp works that mean you have problem with ftp and samba
but you didnot conferm me yet
ASKER
Yes, 480Kib is the reading - I meant 0 EXTRA traffic - since I was under the impression that you were attributing slow network performance to some other rogue traffic eating up capacity...
Internet bandwidth is not a problem on the CentOS VM box - if I ftp from the VM box to a public FTp, I get close to my 4mb ADSL speed limit, my problem is when I try to do fiel transfers between PC's on my LAN, then it seems that speeds are still in the same region as what I get internet wise - and I'm expecting MUCH faster local LAN speeds - all my NIC's, cables and switches are Gigabit capable.
Internet bandwidth is not a problem on the CentOS VM box - if I ftp from the VM box to a public FTp, I get close to my 4mb ADSL speed limit, my problem is when I try to do fiel transfers between PC's on my LAN, then it seems that speeds are still in the same region as what I get internet wise - and I'm expecting MUCH faster local LAN speeds - all my NIC's, cables and switches are Gigabit capable.
ASKER
winscp gives me the same slow speed
have a look at this one
http://communities.vmware.com/thread/103787
do you have 64 bit or 32 bit system ??
http://communities.vmware.com/thread/103787
do you have 64 bit or 32 bit system ??
ASKER
32 bit, and the disk I/O is definitely not the bottleneck.
ok what service is running on the linux box ?? and also you said, you already disable all the firewall on this linux box still is same problem right ??
is there any way to enable and disable bridge network ??
i am not sure but some where i saw that due to duplixing problem sometime network performance gets slow hence file copy and other
i am not sure but some where i saw that due to duplixing problem sometime network performance gets slow hence file copy and other
any luck for your problem ??
ASKER
Nope - have tried setting Vm guest to single CPU - but nothing seems to be working...
ASKER
Guys, I'm still nowhere closer to fixing this - I'm going to accept your comments nonetheless, since some of the comments may help others - unfortunately, it didn't help for me...
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try to disable everything