similar to: disable TCP slowstart ?

I have a beefy machine (Intel dual-quad core, 16GB memory 2 x GigE) I have loaded RHEL5.1-xen on the hardware and have created two logical systems: 4 cpus, 7.5 GB memory 1 x Gige Following RHEL guidelines, I have it set up so that eth0->xenbr0 and eth1->xenbr1 Each of the two RHEL5.1 guests uses one of the interfaces and this is verified at the switch by seeing the unique MAC addresses.

Can anyone tell me whether I have a routing problem, or an openVPN problem, or something else? I''ve stared at this for so long I think I must be looking in the wrong place! I have 3 machines: Machine A has single ethernet card, eth0, 192.168.5.5 Machine B has eth0, 192.168.5.? on the local net, eth1, 81.2.x.y to the internet, and

Hi list (and happy new year), I'm experiencing some troubles using Samba (4.1.17 debian version) over VPN. Basically we've following setup : PC === LAN ===> VPN (WAN) ==== LAN ===> Samba file Server Copying big (say > 1MiB) files from PC to Samba file server almost always ends up with a NT_STATUS_IO_TIMEOUT error (or "a network error occured" if trying to copy from

Hi all, I order to reach maximum performance on my centos kvm hosts I have use these params: - On /etc/grub.conf: kernel /vmlinuz-2.6.18-164.11.1.el5 ro root=LABEL=/ elevator=deadline quiet - On sysctl.conf # Special network params net.core.rmem_default = 8388608 net.core.wmem_default = 8388608 net.core.rmem_max = 16777216 net.core.wmem_max = 16777216

Hi, We are running on 5.5 on a HP ProLiant DL360 G6. Kernel version is 2.6.18-194.17.1.el5 (we had also tested with the latest available kernel kernel-2.6.18-238.1.1.el5.x86_64) We running some performance tests using the "iperf" utility. We are seeing very bad and inconsistent performance on the UDP testing. The maximum we could get, was 440 Mbits/sec, and it varies from 250 to 440

Hi, Below is my Linux firewall network configuration: - eth0 - isp 1, IP: 1.1.1.10, Netmask: 255.255.255.252 eth1 - isp 2, IP: 2.2.2.10, Netmask: 255.255.255.252 eth2 - lan, IP: 172.16.0.254, Netmask: 255.255.255.0 eth3 - dmz, 192.168.0.254, Netmask: 255.255.255.0 isp 1 gateway: 1.1.1.9 isp 2 gateway: 2.2.2.9 Below is my iptables rules: - echo 1 > /proc/sys/net/ipv4/ip_forward iptables

Hi, I''m doing some test on a network 10 gb nics and xen with version 3.1 i''m measuring 2.5 gb/sec from domU to an external physical machine with iperf. switching to 3.2 has reduced the measured performance to 40-50 Mb/sec. did anything change in the network interface? can someone help me? thanks _______________________________________________ Xen-users mailing list

Hi all, I have a rhel 5.1 xen server with two rhel 3 ES hvm guests installed. Both rhel3 guests use an internal xen bridge (xenbr1) which it isn''t binded to any physical interface host. On this bridge throughput it is very very poor, only 2.5 Mbs. How can I increase this throughput??? Many thanks. -- CL Martinez carlopmart {at} gmail {d0t} com

I have htb on 486 sx with 16mb ram. Slackware 9.1. Connection : dsl 1Mbit. 486 works as router and trafic shaper for network made of 12 pc''s. it does the job quite well, but when i play Counter-Strike or connect to my 486 via ssh (on lan), i get huge lag every 11-20 sec. when i connect to 486 via ssh and run iptraf program i see all the trafic, and after a while when lag comes the

Will VoIP be Next? Telco's that provide Internet services to their customers are now trying to charge select companies for large volumes of content that pass over their network to their paying customers! What part of this "greed fest' makes any sense to you? Telco's sell DSL telling customers how much faster it is, how much they can do with Highspeed Internet connections and now

OS: CentOS 5.0 x86. Hi, I am using CentOS 5.0 at home, ADSL ~16 Mbps/~1 Mbps Internet connection and my ping time to my ISP is 160-170 msec. When downloading something with Firefox, I am getting download speeds of about 100-180 KB/sec (for example when downloading SP2 of XP from MS server). Are the CentOS networking settings OK for this kind of latency, or do I have to change some settings?

Hi, On one of our asterisk systems that is quite busy, we are seeing the following from 'netstat -s': Udp: 17725210 packets received 36547 packets to unknown port received. 44017 packet receive errors 17101174 packets sent RcvbufErrors: 44017 <--- this When this number increases, we see SIP errors, and in particular Qualify packets are lost, and

i all I use linux as GiGE router and have 6 NIC on it Those days the NIC interrupt takes around 100% CPU but the system is 4G memroy and 8 CPU. I can't see any error packet in this NIC interface too After I block the udp, the %CPU drops. but the UDP only takes around 8M in general We use UDP traffic for voice. Do you have any suggestion ? increase the kernel parameter? Thank you so much

That's quite helpful, thanks, At the end of the day I would like to find some tool in Centos repository which as output will give me attachment in plain/text format (attachment is either plain text either html, but if I will have a attachment as plaint/text that would be enough to process content of attachment) Mails are coming from exchange server, and they are in eml format. Any mime tool

i just purchased a tripp lite OMNIVS1500XL and have been attempting to get it working with the usb drivers since it doesn't have a serial port. it hasn't been anywhere near successful and i was hoping someone might be able to point me in the right direction. i run gentoo and this is what i currenlty have installed: nut 2.0.2 libusb 0.1.10a (gentoo modified) usbutils 0.11-r5

Hello everybody! I'am just leaning Python and wanted to write something useful for me, an recursive masstagger for ogg-vorbis files. My script uses pyvorbis 1.3 from the Debian testing tree. so far here is my Problem: The pyvorbis bindings aren't documented. As i understand the pyvorbis package, this is a simpe 1:1 mapping to libvorbis. dir(pyvorbins-oject) gives me an refernece to an

We've moved within the last two months to Asterisk 1.4.x All remote facilities are connected via highspeed (9mbit) connections (Over OpenVPN) to a central Asterisk box, acting as a voice router, that funnels all calls into our Avaya Definity G3R via PRI. When corporate employees visit the remote facilities and try to call the G3R's voice mail system(Audix), DTMF is not recognized unless

Greetings all- I have a CentOS 5 (Final) system that is serving up content to several other hosts via NFS. The amount of data transferred is rather small as most of the files are under 100kb and each export has maybe 100 files that are accessed regularly. I'm finding that as I add more hosts accessing the NFS server, the performance seems to be getting poorer. There are obvious delays when

Dear R-Experts. I collected different datas about Nitrogen content (mg/ml) in Dung. The dung was eighter fresh (day=0) or had different ages (15,29,47) to observe nutrient changes over time. Now I like to draw a boxplot. boxplot(nmgml~day) abline((nmgml~day) The Problem is, that the boxplot considers the day values as groups and not as time series (neighter when the days are numeric or

Currently I'm running CentOS 4.4 on a Dell Poweredge 850 with an Intel Pro/1000 Quad-port adapter. I seem to be able to only achieve 80% utilization on the adapter, while on the same box running Fedora Core 5 I was able to reach 99% utilization. I am using iSCSI Enterprise Target as my application and I am using the nullio feature, it just discards any write and sends back random data for