Is there a network traffic stoppage/downtime if I switch vlans

I have a quick question.
I have a switch that is in production that handles our ESX server environment. I need to change the Vlan the ESX servers are connected to. If I change the switch ports with the command int range Gi0/8-17, switchport mode access vlan 52. then what sort of downtime and/or loss traffic can I expect if I switch it on the fly?
thanks!

First I think you need the command "switchport acess vlan 52. But that's not the topic ;-)..
Like Guiseppe said, when the routing or L3 connection is possible. Do you have portfast enable? Or is it an trunk which is normaly user by ESX I think. When it is an access port and portfast is enable i think it would work fast. 50 sec. are only on normal stp enviroments.
Seabstian

Similar Messages

Finder locks up when there is network traffic

Mac Mini Intel Core Dual 2007
OSX 10.4.8
Recently i had an issue where a Mac Mini 2007 (first Intel Mini) which worked perfectly for years didn't boot anymore.
I checked ran a check of the harddisk using Disk Utility and it turned out that both boot records, the main partition and the Recovery partition were corrupt.
I was able to boot from an external disk and save my data, so i was lucky.
I replaced the harddrive and tried to install OSX from the DVD only to find out that after appx 1 minute into the install the Finder would stop working. Spinning beachball.
Maybe this drive was also bad, so i replaced the drive again with yet another harddisk. Same situation.
So maybe something happened to the memory, maybe when a certain spot on the memory gets used the Finder stops. So i replaced the memory as well. Same situation.
What else can i swap out? Video is on board, so i decided to remove the Wifi card, just as a test. Then the installer runs correctly and the Mini works as expected. I was able to reinstall OSX and since i don't use Wifi, and assuming the Wifi adapter was at fault, i left the Wifi card out and reinstalled OSX.
That was in my lab. But when i moved the Mini to its place and hooked up the ethernet cable again i got the same symptom. After appx.1 minute Finder stops.
When i boot the Mini without the ethernet cable it boots ok. When i connect the ethernet cable i get the same symptom as when i had the Wifi adapter in the Mini, after 1 minute Finder stops.
The ethernet adapter is working because when i configure an IP address that is already on the network i get an error message. This can only happen if the adapter is able to listen on the cable.
I reset the PRAM, tried Safe boot all with the same result.
Any idea what might have happened here?
Thanks,
Ton.

system.log
Jun 6 17:54:44 localhost DirectoryService[11]: Improper shutdown detected
Jun 6 17:54:40 localhost com.apple.launchd[1]: *** launchd[1] has started up. ***
Jun 6 17:54:54 localhost mDNSResponder[17]: mDNSResponder mDNSResponder-212.1 (Jul 24 2009 22:34:14) starting
Jun 6 17:54:54 localhost configd[15]: BUG in libdispatch: 10A432 - 1656 - 0xa30f
Jun 6 17:54:54 Toontjes-Mac-mini configd[15]: setting hostname to "Toontjes-Mac-mini.local"
Jun 6 17:54:54 Toontjes-Mac-mini configd[15]: network configuration changed.
Jun 6 17:54:55 Toontjes-Mac-mini configd[15]: Sleep - Filtered Sleep Failure Report - Power Button Shutdown - Early Failure
Jun 6 17:54:57 Toontjes-Mac-mini bootlog[43]: BOOT_TIME: 1402070074 0
Jun 6 17:54:57 Toontjes-Mac-mini fseventsd[37]: event logs in /.fseventsd out of sync with volume. destroying old logs. (705 23 58876)
Jun 6 17:54:57 Toontjes-Mac-mini fseventsd[37]: log dir: /.fseventsd getting new uuid: 1F2A324C-CFF3-4B36-9120-FC3BBB6AEB7E
Jun 6 17:54:57 Toontjes-Mac-mini com.apple.usbmuxd[27]: usbmuxd-167.1 built for iTunesEightTwo on Jul 9 2009 at 14:02:00, running 32 bit
Jun 6 17:54:57 Toontjes-Mac-mini blued[44]: Apple Bluetooth daemon started
Jun 6 17:54:57 Toontjes-Mac-mini /System/Library/CoreServices/loginwindow.app/Contents/MacOS/loginwindow[33]: Login Window Application Started
Jun 6 17:54:58 Toontjes-Mac-mini loginwindow[33]: Login Window Started Security Agent
Jun 6 17:54:59 Toontjes-Mac-mini loginwindow[33]: Login Window - Returned from Security Agent
Jun 6 17:54:59 Toontjes-Mac-mini loginwindow[33]: USER_PROCESS: 33 console
Jun 6 17:54:59 Toontjes-Mac-mini com.apple.launchd.peruser.501[72] (com.apple.ReportCrash): Falling back to default Mach exception handler. Could not find: com.apple.ReportCrash.Self
Jun 6 17:55:01 Toontjes-Mac-mini com.apple.launchd.peruser.501[72] (com.apple.Kerberos.renew.plist[97]): Exited with exit code: 1
Jun 6 17:55:04 Toontjes-Mac-mini WindowServer[54]: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
Jun 6 17:55:04 Toontjes-Mac-mini com.apple.WindowServer[54]: Fri Jun 6 17:55:04 Toontjes-Mac-mini.local WindowServer[54] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
Jun 6 17:55:27 Toontjes-Mac-mini _mdnsresponder[110]: /usr/libexec/ntpd-wrapper: scutil key State:/Network/Global/DNS not present after 30 seconds
Jun 6 17:55:27 Toontjes-Mac-mini _mdnsresponder[113]: sntp options: a=2 v=1 e=0.100 E=5.000 P=2147483647.000
Jun 6 17:55:27 Toontjes-Mac-mini _mdnsresponder[113]: d=15 c=5 x=0 op=1 l=/var/run/sntp.pid f= time.euro.apple.com
Jun 6 17:55:27 Toontjes-Mac-mini _mdnsresponder[113]: sntp: getaddrinfo(hostname, ntp) failed with nodename nor servname provided, or not known
Jun 6 17:55:40 Toontjes-Mac-mini fseventsd[37]: could not open <</Volumes/Untitled 1/.fseventsd/fseventsd-uuid>> (No such file or directory)
Jun 6 17:55:43 Toontjes-Mac-mini fseventsd[37]: log dir: /Volumes/Untitled 1/.fseventsd getting new uuid: E88E6A82-E349-43AE-B890-4A1FBB044006
Jun 6 17:55:43 Toontjes-Mac-mini mds[32]: (Normal) DiskStore: Creating index for /Volumes/Untitled 1
Jun 6 17:55:47 Toontjes-Mac-mini mdworker[125]: (Error) SyncInfo: searchfs error (Result too large) -- falling back to fsw search /
Jun 6 17:56:36 Toontjes-Mac-mini configd[15]: network configuration changed.
Jun 6 18:00:20 localhost com.apple.launchd[1]: *** launchd[1] has started up. ***
Jun 6 18:00:26 localhost DirectoryService[11]: Improper shutdown detected
Jun 6 18:00:35 localhost mDNSResponder[17]: mDNSResponder mDNSResponder-212.1 (Jul 24 2009 22:34:14) starting
Jun 6 18:00:36 localhost configd[14]: network configuration changed.
Jun 6 18:00:36 Toontjes-Mac-mini configd[14]: setting hostname to "Toontjes-Mac-mini.local"
Jun 6 18:00:37 Toontjes-Mac-mini configd[14]: Sleep - Filtered Sleep Failure Report - Power Button Shutdown - Early Failure
Jun 6 18:00:38 Toontjes-Mac-mini bootlog[46]: BOOT_TIME: 1402070413 0
Jun 6 18:00:38 Toontjes-Mac-mini fseventsd[40]: event logs in /.fseventsd out of sync with volume. destroying old logs. (257 25 341)
Jun 6 18:00:38 Toontjes-Mac-mini fseventsd[40]: log dir: /.fseventsd getting new uuid: BA7A6CFF-FB56-4314-9D28-CE142454FF73
Jun 6 18:00:39 Toontjes-Mac-mini com.apple.usbmuxd[30]: usbmuxd-167.1 built for iTunesEightTwo on Jul 9 2009 at 14:02:00, running 32 bit
Jun 6 18:00:39 Toontjes-Mac-mini blued[47]: Apple Bluetooth daemon started
Jun 6 18:00:39 Toontjes-Mac-mini /System/Library/CoreServices/loginwindow.app/Contents/MacOS/loginwindow[36]: Login Window Application Started
Jun 6 18:00:40 Toontjes-Mac-mini loginwindow[36]: Login Window Started Security Agent
Jun 6 18:00:41 Toontjes-Mac-mini loginwindow[36]: Login Window - Returned from Security Agent
Jun 6 18:00:41 Toontjes-Mac-mini loginwindow[36]: USER_PROCESS: 36 console
Jun 6 18:00:41 Toontjes-Mac-mini com.apple.launchd.peruser.501[74] (com.apple.ReportCrash): Falling back to default Mach exception handler. Could not find: com.apple.ReportCrash.Self
Jun 6 18:00:42 Toontjes-Mac-mini com.apple.launchd.peruser.501[74] (com.apple.Kerberos.renew.plist[103]): Exited with exit code: 1
Jun 6 18:00:50 Toontjes-Mac-mini WindowServer[57]: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
Jun 6 18:00:50 Toontjes-Mac-mini com.apple.WindowServer[57]: Fri Jun 6 18:00:50 Toontjes-Mac-mini.local WindowServer[57] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
Jun 6 18:01:09 Toontjes-Mac-mini _mdnsresponder[115]: /usr/libexec/ntpd-wrapper: scutil key State:/Network/Global/DNS not present after 30 seconds
Jun 6 18:01:09 Toontjes-Mac-mini _mdnsresponder[118]: sntp options: a=2 v=1 e=0.100 E=5.000 P=2147483647.000
Jun 6 18:01:09 Toontjes-Mac-mini _mdnsresponder[118]: d=15 c=5 x=0 op=1 l=/var/run/sntp.pid f= time.euro.apple.com
Jun 6 18:01:09 Toontjes-Mac-mini _mdnsresponder[118]: sntp: getaddrinfo(hostname, ntp) failed with nodename nor servname provided, or not known
Jun 6 18:02:10 Toontjes-Mac-mini SecurityAgent[129]: com.apple.desktopservices|2014-06-06 18:02:10 +0200
Jun 6 18:04:59 Toontjes-Mac-mini SecurityAgent[129]: com.apple.desktopservices|2014-06-06 18:04:59 +0200

Server admin not showing network traffic graph

This topic was posted a while ago with no solution, and it has been [archived|http://discussions.apple.com/thread.jspa?messageID=6953359]. I have just experienced the same problem with Leopard Server Admin (SA). It seems to be a problem on the server, not in the client admin, since it occurs both when I use SA on the server itself and a client, and deleting client prefs. has not helped. I'm presuming that there is a corrupted database or prefs. file for this graph.
All the other SA graphs show just fine. Fixing permissions has not helped, either.
Anyone have any idea where to look on the server? Thanks.
Message was edited by: Trevor Jacques

I'm pretty sure I have since I have a few Mac Mini's on the network with their home directory residing on the server and my Windows users are sharing a few daily use files on the server including a MYOB data file, also our intranet web site is hosting on the same server, not to mention I have 3 print queues there and all the outgoing mails from both of our all-in-one scan to email machines are using the same server. All of these services and users are using their computer as if nothing is wrong, so I have to assume that there is network traffic unless server admin interprets the term "network traffic" differently.

How do I time out my thread if there is no network traffic

How do I time out my thread if there is no network traffic for a given time? I have the following code listening for data:
StringBuffer requestLine = new StringBuffer();
int c;
while(true) {
    c = in.read();
    if(c == '\r' || c == '\n') {//Not sure here???
        break;
    requestLine.append((char)c);
}But how do I time this out if there has been no traffic for lets say 5 minutes?

Have you redefined 'in'?
If it's a raw socket connection, you can use the Socket.setSoTimeout method before you open the connection to specify how long it should hold it open if there is no data available.

Is there anyway to monitor network traffic on the newer Time Capsules, similar to the SNMP monitoring previously?

Is there anyway to monitor network traffic on the newer Time Capsules, similar to the SNMP monitoring previously?

Can I use a real router and still have the Time Capsule for backups etc?
Yes, that is what Bridge Mode is for. Just connect the Time Capsule to a LAN <--> Ethernet port on your "main" router.

I need a clarification : Can I use EJBs instead of helper classes for better performance and less network traffic?

My application was designed based on MVC Architecture. But I made some changes to HMV base on my requirements. Servlet invoke helper classes, helper class uses EJBs to communicate with the database. Jsps also uses EJBs to backtrack the results.
I have two EJBs(Stateless), one Servlet, nearly 70 helperclasses, and nearly 800 jsps. Servlet acts as Controler and all database transactions done through EJBs only. Helper classes are having business logic. Based on the request relevant helper classed is invoked by the Servlet, and all database transactions are done through EJBs. Session scope is 'Page' only.
Now I am planning to use EJBs(for business logic) instead on Helper Classes. But before going to do that I need some clarification regarding Network traffic and for better usage of Container resources.
Please suggest me which method (is Helper classes or Using EJBs) is perferable
1) to get better performance and.
2) for less network traffic
3) for better container resource utilization
I thought if I use EJBs, then the network traffic will increase. Because every time it make a remote call to EJBs.
Please give detailed explanation.
thank you,
sudheer

Please suggest me which method (is Helper classes or Using EJBs) is perferable :
1) to get better performance
EJB's have quite a lot of overhead associated with them to support transactions and remoteability. A non-EJB helper class will almost always outperform an EJB. Often considerably. If you plan on making your 70 helper classes EJB's you should expect to see a dramatic decrease in maximum throughput.
2) for less network traffic
There should be no difference. Both architectures will probably make the exact same JDBC calls from the RDBMS's perspective. And since the EJB's and JSP's are co-located there won't be any other additional overhead there either. (You are co-locating your JSP's and EJB's, aren't you?)
3) for better container resource utilization
Again, the EJB version will consume a lot more container resources.

Unknown network traffic / router traffic monitoring

So I got a new PC with windows 7 on it, and I installed this gadget that monitors network traffic, and it shows a lot of traffic that my local PC isn't showing, so I am thinking there is something running on the LAN that I can't see. I was looking to find a live, better program to monitor the actiontec router, for traffic. anyone know of anything that can maybe show me who is using all the bandwidth on my network?
i have found software for Linksys, but nothing for the Actiontec.
Thanks,
Quasimodem
Fios in Florida
Solved!
Go to Solution.

Keep in mind that when looking at Wireshark (sniffer) software there are different types of traffic:
Unicast
Broadcast
Multicast
Unicast is traffic between two devices. You will see the traffic between the PC with wireshark and another device on your local network such as a printer, another PC or the Router. You should not see traffic between another PC and the Internet for example. Using a phone as an example some calls you and the conversation is between you and the person on the other end of the phone. This is unicast traffic. Using defaults of the actiontec, IP address seen will be 192.168.1.1 for the router and 192.168.1.2-99 for devices on your network. If you have the TV service, 192.168.1.100-1xx is used for the cable boxes.
Broadcast traffic is traffic sent to all devices. Its not directed toward a particular PC but rather usually looking for information. In a sniffer trace you will see broadcast traffic. Going back to the phone example, someone makes an announcement on an overhead intercom system that is broadcast traffic. Broadcast traffic will be seen as 192.168.255.255
Multicast traffic is traffic from one device for many devices. Usually used in video feeds. Using the phone system as an example someone wishes to tell a group of people something so instead of calling each person up and telling them each person who wants the information joins a conference bridge. Anyone is allowed to listen but only those that wish to get the information receive it. Generally how multicast works. Multicast traffic will be seen as IP address 224.x.x.x or something of the sorts where the address will be 2xx.x.x.x.
I hope this makes sense. Probably more information than you needed but at least it will help you understand what wireshark is telling you.

There are no traffic sources available to this Database Firewall

Hi, Experts, I want to create " Enforcement Points" in DBforewall. But I get message :"There are no traffic sources available to this Database Firewall, You will not be able to use the system in its current state. Please install more network interfaces and reinstall the Database Firewall software. "
I have two netwotk cards. one is for DBFW access, one is for capture network trafic. Any one can help me?
#ifconfig
eth0 Link encap:Ethernet HWaddr 00:1F:16:2D:77:9D
inet addr:10.182.?.? Bcast:10.182.207.255 Mask:255.255.254.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:20991 errors:0 dropped:0 overruns:0 frame:0
TX packets:8187 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:2706212 (2.5 MiB) TX bytes:6313332 (6.0 MiB)
Memory:f2600000-f2620000
eth1 Link encap:Ethernet HWaddr 00:1B:8C:25:19:3B
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:150859 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:25953197 (24.7 MiB) TX bytes:0 (0.0 b)
Interrupt:122
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:8863 errors:0 dropped:0 overruns:0 frame:0
TX packets:8863 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:6188256 (5.9 MiB) TX bytes:6188256 (5.9 MiB)

I think the problem is that as the error message says, you don't have enough network interfaces available.
The installation process creates a network bridge and therefore you need 3 network interfaces: eth0 ist for management access, eth1 and eth2 are the ports for the bridge (an IP will not be assigned for these two interfaces) and at last the br0 interface. When you don't provide enough interfaces during the installation process, the bridge will not be configured and this could be the problem.

SAP DMS - SAP ECC network traffic

Hi all,
I have the following situation:
The SAP ECC servers are hosted outside my company and we are planning to install a SAP DMS server.
We have 2 options: host the SAP DMS outside or install SAP DMS in our datacenter.
When the SAP user attaches or reads a file to/from SAP DMS, how is the network traffic ?
Is there any traffic fom SAP ECC to SAP DMS or the file goes to/from DMS from/to end-user ?
How SAP DMS impacts my WAN ?
Best Regards,
Leonardo.

Leonardo, I have done some research / trouble shooting and architectural changes to raise the upload / download speeds, there are several dependencies like Network, Application, hardware etc but to your question:
First of all, DMS is a core functionality of ECC and utilizes both ECC for execution and Content Servers (recommended for Obvious performance reasons) for Data Storage. For your case I recommend that you host Content Server at the Data Center (assuming you have no other option) and have a Cache Server installed Onsite. (This requires minimal maintenance). When the user uploads a file the traffic is high as the entire File needs to be transferred to the data center, on the other hand Cache server (if installed onsite) considerably reduces the retrieval time.
Again having said above there are several other parameters that could affect your upload / download speeds.
Hope you'll find this useful, let me know if you have further questions.
regards
C

Curious about App-V 4.6 RO Cache Network Traffic

Our environment is Server 4.5 SP2, and Client 4.6 SP3. We utilize RO cache on DFS network storage, and our clients are VDI VM's.
We recently ran into an issue when we recycled a large pool of VM's where the CPU/Network Utilization was maxed on our cache file server. Upon further investigation there appears to be about 550MB of traffic between each VM and the Cache file itself when
the VM boots (no users logged in). Can someone explain to me what this traffic could be?

In RO cache mode (ReadOnlyFSD], *nothing* should get streamed down to the client at all.
where does the amount of data show up - any specific files/folders, or monitored network traffic between the client and the DFS share?
is there anything in the App-V log file?
Did you initiate a server publishing refresh with a user that has access to all applications before you sealed the VDI Master image?
Falko
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CPU 100%, network traffic light

My setup:
Xserve G4, 2 Gb RAM
OSX Server 10.4.11
In recent days, the server CPU is maxed out as shown by the graphs in Server Admin. Our network traffic is fairly light as shown by the graph.
I run:
top -o cpu
Processes: 71 total, 7 running, 64 sleeping... 197 threads 08:35:30
Load Avg: 7.69, 6.83, 6.10 CPU usage: 82.6% user, 17.4% sys, 0.0% idle
SharedLibs: num = 134, resident = 22.1M code, 3.04M data, 6.75M LinkEdit
MemRegions: num = 9369, resident = 270M + 6.72M private, 44.1M shared
PhysMem: 113M wired, 141M active, 824M inactive, 1.05G used, 711M free
VM: 4.36G + 85.0M 26950(0) pageins, 0(0) pageouts
PID COMMAND %CPU TIME #TH #PRTS #MREGS RPRVT RSHRD RSIZE VSIZE
15923 httpd 19.2% 0:01.98 1 12 249 6.91M+ 19.5M 11.7M+ 72.4M+
15867 httpd 18.0% 0:05.45 1 12 275 14.0M+ 19.4M 18.8M+ 79.4M+
15926 httpd 17.5% 0:01.57 1 12 247 6.38M+ 19.5M 11.0M+ 71.9M+
15922 httpd 17.4% 0:02.01 1 12 257 9.51M+ 19.5M 14.3M+ 74.9M+
15870 httpd 9.9% 0:13.47 1 12 275 13.8M+ 19.5M 18.7M+ 79.1M+
15917 top 7.6% 0:05.40 1 26 22 1.17M 448K 1.59M 27.0M
15871 httpd 7.4% 0:13.82 1 12 274 13.8M+ 19.5M 18.8M+ 79.1M+
269 mysqld 1.5% 2:47:51 29 150 134 29.6M- 5.48M 33.3M- 132M-
0 kernel_tas 0.4% 5:11.65 43 2 2532 19.4M 0K 96.5M 1.11G
106 lookupd 0.1% 1:27.48 6 44 53 4.23M+ 1020K 4.98M+ 33.6M+
102 SecurityAg 0.1% 1:34.08 1 69 99 1.76M 7.10M 8.66M 116M
48 memberd 0.0% 1:20.43 3 22 24 268K 412K 628K 27.7M
15650 sshd 0.0% 0:00.42 1 11 42 108K 1.62M 496K 30.0M
38 netinfod 0.0% 0:21.80 1 14 22 208K 524K 572K 26.9M
63 WindowServ 0.0% 0:14.16 2 67 56 588K 4.97M 5.02M 92.2M
52 notifyd 0.0% 0:10.16 2 79 21 204K 416K 468K 27.2M
120 ntpd 0.0% 0:04.63 1 11 19 192K 608K 412K 27.1M
298 httpd 0.0% 0:06.42 1 10 229 104K 19.5M 7.00M 79.8M
272 serialnumb 0.0% 0:00.96 3 27 32 308K 800K 1.08M 28.3M
15921 httpd 0.0% 0:01.17 1 12 277 14.3M 19.5M 18.6M 79.9M
15920 httpd 0.0% 0:01.19 1 13 277 14.3M 19.5M 18.7M 79.9M
15919 httpd 0.0% 0:01.23 1 12 274 13.8M 19.5M 18.3M 79.2M
15918 httpd 0.0% 0:01.44 1 13 229 1.66M 19.5M 6.32M 67.1M
15900 httpd 0.0% 0:06.63 1 12 277 14.4M 19.5M 19.2M 79.9M
15881 trivial-re 0.0% 0:00.01 1 16 19 200K 512K 760K 26.7M
15869 httpd 0.0% 0:11.61 1 12 275 13.9M 19.5M 18.6M 79.4M
15868 httpd 0.0% 0:09.79 1 12 274 13.8M 19.5M 18.9M 79.1M
15852 servermgrd 0.0% 0:01.47 4 61 169 4.30M 3.86M 7.28M 46.4M
15824 pickup 0.0% 0:00.01 1 16 20 204K 500K 700K 26.7M
15651 bash 0.0% 0:00.04 1 14 17 200K 896K 820K 27.2M
15643 sshd 0.0% 0:00.12 1 18 43 128K 1.62M 1.36M 30.1M
348 slpd 0.0% 0:00.40 6 31 34 260K 908K 968K 30.2M
305 httpd 0.0% 66:38.29 1 13 237 3.14M 19.4M 9.52M 68.3M
304 httpd 0.0% 66:09.95 1 13 278 15.1M 19.4M 21.0M 80.3M
303 httpd 0.0% 68:59.73 1 13 234 3.17M 19.4M 9.29M 68.3M
302 httpd 0.0% 66:02.83 1 13 281 15.3M 19.4M 20.8M 80.0M
301 httpd 0.0% 68:12.51 1 13 281 15.6M 19.4M 21.4M 81.0M
300 rotatelogs 0.0% 0:00.02 1 14 18 136K 380K 360K 26.6M
299 rotatelogs 0.0% 0:04.57 1 14 18 140K 380K 364K 26.6M
285 mds 0.0% 0:00.05 6 71 46 556K 1.37M 1.88M 40.8M
217 sh 0.0% 0:00.04 1 14 18 188K 812K 720K 27.2M
207 getty 0.0% 0:00.00 1 14 18 112K 388K 332K 26.6M
164 crashrepor 0.0% 0:00.00 1 17 18 120K 384K 200K 26.6M
150 automount 0.0% 0:00.02 3 40 30 312K 932K 1.05M 28.7M
146 automount 0.0% 0:00.03 3 42 34 312K 968K 1.09M 29.0M
143 rpc.lockd 0.0% 0:00.00 1 10 18 108K 432K 192K 26.7M
134 nfsiod 0.0% 0:00.00 5 30 25 128K 376K 180K 28.6M
101 authorizat 0.0% 0:00.05 1 31 27 368K 940K 1.21M 27.4M
98 mcxd 0.0% 0:02.21 1 41 39 608K 1.26M 2.23M 69.1M
95 loginwindo 0.0% 0:00.25 3 101 90 904K 2.04M 3.25M 102M
Not sure where to start diagnosing this issu

Camelot,
Thanks again for your response!
Camelot wrote:
You shouldn't need to do that - what happens when you try?
Safari can't connect to the server "localhost".
The only thing I can think of off-hand that would cause this is if mod_status was disabled (which you might have done thinking you didn't need it). It would be a good idea to re-enable this, even if only short-term, to get an idea of what's going on.
mod_status is not listed in Web > Modules
Not sure if it will help significantly but I did enable the query cache for MySQL.
The query cache will generally help reduce load on the database server, but only if there's sufficient RAM on the server to cache the queries and results. The real question is how mush RAM is your system using? If it's out of memory then enabling the query cache can be detrimental.
For that matter, do your sites seem slow? Is your only concern the relatively high CPU load? or are pages loading slowly, too?
The pages are taking exceptionally long to load.
The 1.7 Gb Ram...Yes, it's a config of 512-512-512-256.
Swapping that 256MB for a 512MB seems like a no-brainer, no matter what else you do. It'll cost you $20 from OWC.
You're right...no brainer. Will do
Was wondering if a permissions issue could create the problems I'm having with Apache?
Unlikely. If apache didn't have permission to serve a file it would throw an error page back pretty quickly. I can't see this is the cause, but a quick look at apache's error log will tell you if there are any permission issues.
The site was running well this morning but as bloggers logged into Wordpress and general traffic picked up, the CPU load ramped up to 100% and pages are now loading very slowly.

Impact of NI-PSP on network traffic?

Hi,
We are planning a large-scale automation project and are looking to widely use Shared Variables. What concerns should we have about the impact on network traffic? Should the LabVIEW-based systems exist on their own subnet? Are there any special network switch hardware that is recommended? For instance, Rockwell Automation systems use UDP and recommend switches capable of IGMP Snooping. Are any such network hardware features recommeded for a system based on LabVIEW Shared Variables? Thank you.
Chris White
ThinkG Consulting LLC

Chris,
I am not aware of any recommended out of the ordinary network hardware for use with NI-PSP. There have been issues on machines that have more than one network interface enabled, and this is not a supported configuration, as noted in the LabVIEW DSC Readme:
"Network-published shared variables do not function properly if multiple network
adapters are enabled on the same computer."
NI-PSP is built on UDP and any firewalls that block certain UDP ports can be a problem. How external network traffic affects NI-PSP and vice versa is a pretty arbitrary question that obviously depends on how much external traffic you have and how much NI-PSP traffic you have, which depends on the number of shared variables, the number of subscribers and publishers, and the update rates of these variables, as well as whether variables are bound to I/O servers. UDP is a lossy protocol so extremely heavy traffic could cause some packets to be missed.
Hope this answers your questions!
Doug M
Applications Engineer
National Instruments
For those unfamiliar with NBC's The Office, my icon is NOT a picture of me

Module problems? (Network traffic dies, some devices stop responding)

I searched the forum and the web, but didn't see anything similar to this. I apologize if this has been answered before.
My problem is that my network traffic randomly just stalls. This happens approximately once a day, at a random moment, during load or no load at all. I don't know anything else than reboot that fixes the issue.
Logs contain the following lines, which are inserted at the time when networking dies:
modprobe: FATAL: Module ip_tables not found.
modprobe: FATAL: Module iptable_filter not found.
modprobe: FATAL: Module ip_queue not found.
nf_hook: Verdict = QUEUE.
nf_hook: Verdict = QUEUE.
nf_hook: Verdict = QUEUE.
nf_hook: Verdict = QUEUE. ....
Another thing is that after Arch has been up for few hours, I can't get my memory card reader working unless I remove and reload the module ehci_hcd. The reader always works straight after boot and after reloading ehci_hcd, but will stop working after some time. From log:
ehci_hcd 0000:00:1d.7: port 4 reset error -110
hub 5-0:1.0: hub_port_status failed (err = -32)
hub 5-0:1.0: Cannot enable port 4. Maybe the USB cable is bad?
These messages keep repeating.
Could these two problems be related? And what to do with them?
Last edited by peabrain (2008-04-28 21:36:59)

I dont think these logs are related. One is for the USB subsystem, the other for networking. They are completely different subsystems.
The networking issue is probably the most annoying so focus on that first.
IP_TABLES and IP_QUEUE are modules relating to ip filtering and queueing. I have to ask the obvious - what are your trying to do with your system. These modules are usually used in firewalls, servers, h/w routers etc. If you dont need them, blacklist them in /etc/rc.conf. Blacklist is deprecated "officially" however , for me it works fine in Arch. Just add the ip_tables and ip_queue to the line with BLACKLIST=() on and uncomment it.
Reboot.
If that doesnt work then something is trying to use these modules and hanging your internet IP packets. Without knowing your system and software install, its diffucult to diagnose and because I dont use this functioanlity, I am no expert but I am aware that ISPs use quite large queues and this can be shifted to a linux box.
nf_filter is the NET FILTER module , used to filter IP packets according to predefined criteria. Not sure why you need this, but I think there is some form of queuing in linux, there has to be given packet arrival in non-sync - has to be queued. If net-hook listed as a module, use "lsmod" as root. If its listed, blacklist it like the others.
Other than that, try a later kernel from www.kernel.org, rebuild it but make sure net filtering and queuing options are turned off.
I really dont know. Google !??
Last edited by keratos (2008-04-29 12:26:45)

Tools to capture network traffic

Hi,
I'm looking for freeware tools which run on windows platform for capturing network traffic out of an interface and then tell that which type for traffic uses how much bandwidth of the interface. for e.g HTTP uses x%, Telnet use y%

Also - check out ntop.
Using the capture that you get from Ethereal/Wireshark it will display the data in a very pretty way.
Check it out here:-
http://images.google.co.uk/images?sourceid=navclient-ff&ie=UTF-8&rls=GGGL,GGGL:2006-26,GGGL:en&q=ntop&sa=N&tab=wi
and get it here:-
www.ntop.org - there is a windows version.
HTH
LH
Please rate all posts

Track past network traffic?

Hello,
We've been having a problem in our studio where someone has been using machines after hours (and possible during work hours) to do downloading. Is it possible to check individual machines (logs, perhaps?) to see network traffic/the amount of files being downloaded/what's being downloaded, etc.?
I maintain our XServe and individual machines, but I've yet to have to deal with anything like this.
The problem has since stopped, but we're hoping there's a way to trace back to where it was originating from (all we can tell is that it's internal on one of the machines in the studio, but not exactly which machine).
Thanks,
Kristin.

depending on how long ago this happened and how far back your logs go, you may be able to determine this.
do you have a firewall that logs traffic? if so, you should be able to look there first as long as the data is available.
OS X won't log network activity by default, but you can probably configure things to do so. i'm not sure, off the top of my head.
at the very least, you can check login times both on your Xserve and on individual workstations. that may provide good leads.
good luck, and post what you find.

Is there a network traffic stoppage/downtime if I switch vlans

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