Skip to main content

networking - Static IP settings wrong? Why?



I have this issue when I try to copy files over my network (from PC to NAS).
The first file seems to copy without a problem until it reaches 99%.
It hangs for minutes and fails eventually.



Let me summarize my equipment:





  • NAS: Brand new Synology RS815 with 4x3TB in RAID10 configuration

  • Transfer medium: CAT6 cabling

  • Switch: Cisco SG500-28P

  • Patch Panel: Tried T568A and T568B termination on the patch panel. No difference there.



I'm building up my network and connected already a few cables to the patch panel.
My PC is connected to the switch without use of the patch panel (RJ45 connector on the cable). The NAS is placed near my PC for testing and is connected to a cat6 wall socket. The other end of the cable is connected to the patch panel where it is patched to the switch.
I can browse the NAS, manage the NAS by web interface

I believe it has something to do with the wiring on the patch panel or with the switch.
When I connect the NAS on another small switch near my pc, I don't have the issue.



EDIT:
I figured out that it has something to do with my static IP configuration.
After putting my NAS and Switch to DHCP, the transfers go without a problem.
I'm confused, because my setup is pretty straight forward. However, I nerver worked with a L2/L3 switch.



My internet provider has a modem with 4 ethernet ports and allows me to go online with 4 devices (wow.. thank you Telenet. 4 devices!! not..).
Their modem is also functional as router but has not many features.

From my modem I go to my own Netgear router (IP of the Netgear in the DMZ of the ISP modem).
From that netgear, I go to the cisco swtich.



How would you config the network?
The Netgear has a DHCP server, the Cisco switch has a DHCP server and also the Synology NAS has a DHCP server.


Answer



I have seen similar issues when the MTU setting is incorrect/mismatched.



Did you enable Jumbo Frames on the NAS? If so try disabling it.




Maybe with a static IP you need to set the MTU manually, but with DHCP it is detecting and setting it automatically.



Also for your Network/DHCP config. Make sure you only have one of the 3 DHCP servers enabled (I would suggest use the one on the Netgear router).


Comments

Popular posts from this blog

linux - iDRAC6 Virtual Media native library cannot be loaded

When attempting to mount Virtual Media on a iDRAC6 IP KVM session I get the following error: I'm using Ubuntu 9.04 and: $ javaws -version Java(TM) Web Start 1.6.0_16 $ uname -a Linux aud22419-linux 2.6.28-15-generic #51-Ubuntu SMP Mon Aug 31 13:39:06 UTC 2009 x86_64 GNU/Linux $ firefox -version Mozilla Firefox 3.0.14, Copyright (c) 1998 - 2009 mozilla.org On Windows + IE it (unsurprisingly) works. I've just gotten off the phone with the Dell tech support and I was told it is known to work on Linux + Firefox, albeit Ubuntu is not supported (by Dell, that is). Has anyone out there managed to mount virtual media in the same scenario?

ubuntu - Monitoring CPU, Mem, disk, on a single server

I've been looking for a simple starter solution for monitoring my [currently] single server hosted solution. Other than Nagios and similar, are there other good (simple) solutions people are using? Answer Everything depends on what you want. For example Munin is very simple, you can install and configure it in less then 10 minutes (on one server), it can sends alarms, make graphs from monitoring cpu, mem. apache connections, eaccellerator, disk io and many many more (it has many plugins). But if you are planning in future get some more machines, munin may not be enough. For example in munin you cant monitor state of individual processes, can't monitor changes in files (for security purpose). So if you wanna only see what is the utilization of basics parameters on your server and don't plan to buy some more servers Munin is what you are looking for, but if you wanna be alarmed when some of your service is down, take more control on what is happeninig on...

hp proliant - Smart Array P822 with HBA Mode?

We get an HP DL360 G8 with an Smart Array P822 controller. On that controller will come a HP StorageWorks D2700 . Does anybody know, that it is possible to run the Smart Array P822 in HBA mode? I found only information about the P410i, who can run HBA. If this is not supported, what you think about the LSI 9207-8e controller? Will this fit good in that setup? The Hardware we get is used but all original from HP. The StorageWorks has 25 x 900 GB SAS 10K disks. Because the disks are not new I would like to use only 22 for raid6, and the rest for spare (I need to see if the disk count is optimal or not for zfs). It would be nice if I'm not stick to SAS in future. As OS I would like to install debian stretch with zfs 0.71 as file system and software raid. I have see that hp has an page for debian to. I would like to use hba mode because it is recommend, that zfs know at most as possible about the disk, and I'm independent from the raid controller. For us zfs have many benefits, ...