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  • CA ArcServe r11.1 - have to switch Tape Drive Offline then Online to finish backup

    - by Richard
    Ill keep it brief, I have an HP Ultrium 1 in a server currently running CA ArcServe r11.1. I have 5 daily backup tapes, each of which are new. 3 of the 5 work fine without intervention but 2 of them stop at varying points through the backup asking for a new tape, even though that tape is not full. The way I have found around this is to switch the tape drive offline for 10 minutes then switch it back online, whilst the backup is still running. Has anyone ever seen this before? If so, any ideas how to permanently fix this. If all else fails just some pointers in the right direction. Thanks

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  • How to take advantage of two Internet connections (WiFi / Wired) ?

    - by Madhur Ahuja
    I have two separate internet connections, one through WiFi and other Wired. However, generally I have observed that Windows try to use only one ( mostly faster one/ Or Wired by preference - I am not sure). Is there a way I can take advantage of having both ? For example I can have my web browser use the wired one and my torrent software use the Wifi One. PS: This question may be regarded as duplicate but reason I am posting it again is I have not found any concrete answer for it. Two internet Connections, one LAN - how to share?

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  • Connect to wired and wireless networks at same time, Ubuntu

    - by Gary Chambers
    Currently, I have a media PC running Ubuntu 10.04 that I am trying to connect via a wired network cable directly to a NAS box, and wirelessly to the router. This works no problem after I run sudo /etc/init.d/networking restart but I can't get both interfaces to come up on system startup. My /etc/network/interfaces file reads as follows: auto eth0 iface eth0 inet static address 10.0.1.2 netmask 255.255.254.0 broadcast 10.0.1.255 network 10.0.1.0 auto wlan2 iface wlan2 inet dhcp As I say, I know this works, because I can get it to work by restarting the network interfaces, but I can't bring them both up on system startup. Does anyone know why this might be?

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  • What equipment do real ISP's use?

    - by Allanrbo
    In a dormitory of 550 residents, people often mistakenly set up DHCP servers for the whole network by plugging in their private Wi-Fi routers wrongly. Also recently, someone mistakenly configured their PC to a static IP being the same as that of the default gateway. We use cheap 3Com switches at the moment. I know that Cisco switches support DHCP snooping to solve the DHCP problem, but that still does not solve the default gateway IP takeover problem. What sort of switch equipment do real ISP's use so their customers cannot break the network for the other customers? What we ended up doing In case anyone are courious, we ended up doing seperate VLANs for each user. And as a matter of fact, not just the 550 users, but for 2500 users (11 dorms). Here's a page describing the setup: http://k-net.dk/technicalsetup/ (the section "Transparent firewall using VLANs"). There was no significant load on the router server as I feared in one of the comments below. Even at 800Mpbs.

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  • How to take advantage of two Internet connections (WiFi / Wired)?

    - by Madhur Ahuja
    I have two separate internet connections, one through WiFi and other Wired. However, generally I have observed that Windows try to use only one ( mostly faster one/ Or Wired by preference - I am not sure). Is there a way I can take advantage of having both ? For example I can have my web browser use the wired one and my torrent software use the Wifi One. PS: This question may be regarded as duplicate but reason I am posting it again is I have not found any concrete answer for it. Two internet Connections, one LAN - how to share?

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  • assign auto static ip on ubuntu 10.04

    - by ronakin
    I'm trying to set auto static ip. I've set the content of /etc/network/interfaces to be: auto lo auto eth0 iface eth0 inet static address 192.168.1.2 netmask 255.255.255.0 gateway 192.168.1.1. and /etc/resolv.conf to be: nameserver 192.168.1.1. It seems that the ip address have set successfully. However, when I plug out the lan cable and then plug it back, the ip address is not set. How can I make it automatically set the static ip when the lan cable is connected?

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  • How important is dual-gigabit lan for a super user's home NAS?

    - by Andrew
    Long story short: I'm building my own home server based on Ubuntu with 4 drives in RAID 10. Its primary purpose will be NAS and backup. Would I be making a terrible mistake by building a NAS Server with a single Gigabit NIC? Long story long: I know the absolute max I can get out of a single Gigabit port is 125MB/s, and I want this NAS to be able to handle up to 6 computers accessing files simultaneously, with up to two of them streaming video. With Ubuntu NIC-bonding and the performance of RAID 10, I can theoretically double my throughput and achieve 250MB/s (ok, not really, but it would be faster). The drives have an average read throughput of 83.87MB/s according to Tom's Hardware. The unit itself will be based on the Chenbro ES34069-BK-180 case. With my current hardware choices, it'll have this motherboard with a Core i3 CPU and 8GB of RAM. Overkill, I know, but this server will be doing other things as well (like transcoding video). Unfortunately, the only Mini-ITX boards I can find with dual-gigabit and 6 SATA ports are Intel Atom-based, and I need more processing power than an Atom has to offer. I would love to find a board with 6 SATA ports and two Gigabit LAN ports that supports a Core i3 CPU. So far, my search has come up empty. Thus, my dilemma. Should I hold out for such a board, go with an Atom-based solution, or stick with my current single-gigabit configuration? I know there are consumer NAS units with just one gigabit interface (probably most of them), but I think I will demand a lot more from my server than the average home user. Any advice is appreciated. Thanks.

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  • Connect to wired and wireless networks at same time, Ubuntu

    - by Gary Chambers
    Currently, I have a media PC running Ubuntu 10.04 that I am trying to connect via a wired network cable directly to a NAS box, and wirelessly to the router. This works no problem after I run sudo /etc/init.d/networking restart but I can't get both interfaces to come up on system startup. My /etc/network/interfaces file reads as follows: auto eth0 iface eth0 inet static address 10.0.1.2 netmask 255.255.254.0 broadcast 10.0.1.255 network 10.0.1.0 auto wlan2 iface wlan2 inet dhcp As I say, I know this works, because I can get it to work by restarting the network interfaces, but I can't bring them both up on system startup. Does anyone know why this might be?

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  • How to determine most stable Cisco IOS release?

    - by Chris J
    This post is about a Catalyst 4948E switch. I was looking on the download page and realized that there are no "GD" versions available. Are the "ED" versions stable? Even if you change "ED" to "GD" in the URL the IOS images are still the same. http://www.cisco.com/cisco/software/release.html?mdfid=283027810&flowid=3592&softwareid=280805680&release=15.1.1-SG2&relind=AVAILABLE&rellifecycle=ED&reltype=latest Is 15.1 as reliable as 15.0? My devices are currently on the 12.2 train. Is there anything special to upgrade to one of the 15.x trains? Are the configurations compatible.

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  • Display current layout WITHOUT using Windows's language bar

    - by Shiki
    Basically I love quick launch and pinning is not for me, I can't just pin 50 apps, nor pin them to start menu / use the win + type method. Anyway, Quick Launch works perfectly under Win7 IF you don't use the language bar. If you use it, sometimes (or always) it may fail to start/appear, you have to readd it. So my question is: Is there a tray app, a RainMeter way to show this? (First would be better). Thanks. (Best would be if I could switch layout globally but that train is gone. (Look at the changing global layout. Thank you Microsoft. (Irony included)).

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  • How to test/debug bad network wiring?

    - by Jack Lloyd
    I recently bought a place already wired with Cat 5E (8 ports, leading to a central closet). However attempting to get link, nothing works. On closer examination, it was obvious that the ends in the closet were wired backwards (brown on pin 1, etc). The jacks that I've pulled out of the wall do look to be correctly done. However, testing with a network cable tester shows zero link between any of the jacks and any of the ports in the closet - I had expected to just see a 1/8, 2/7, ... 8/1 mismatch, but instead get nothing at all. The runs are accessible and look neat, though they take some bends that seem quite sharp and are in some cases much longer than they need to be (the person who put this in was a professional electrician but I suspect this was the first time he ran network cabling). My best guess at this point is that he either bought bad cable, or put so much tension on it that he snapped wires. Though it seems surprising/unlikely that I wouldn't get at least one active wire on one of the 8 lines. So, my question: is there anything else I should try or test before I go ripping out everything and running new cable?

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  • automatically switch from display 1 to display 2 every x minutes

    - by Jean-Pierre
    I am not that good with programmation, but I guess you are. we are planning to install 2 display monitor in the back of the other one. There will be 1 computer that will display a different application on each display monitor. I want to be able to switch display 1 to 2 and display 2 to display 1 to show what is on the other monitor without having to move themselve on the back of the monitor to see the opposite monitor. I need a script that will switch display every x times. How can I do that ?

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  • Ubuntu 10.04 says wired network disconnected, but it works

    - by mistily
    I've installed ubuntu 10.04, hoping to get rid of the 9.10 errors. (Nvidia driver didn't work quite properly, had some problems with clicking in flash, and I had -and still have- wired network working, but ubuntu said that it's disconnected) So the Nvidia driver is better now, but the network error is the same. I still have a working wired network connection, but when it starts says that it is disconnected. Notification area tells me the same thing. Why is that?

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  • Switch monitor configurations on Windows 7

    - by Horst Walter
    I use one of my PCs for flight simulation as well as for home theater. In case one it has 2 monitors attached, and in case 2 (home theater) a HD TV is being used. All 3 monitors are attached at the same time to the graphics card. How could it best switch best between different configurations. In case 1 I'd like to have the configuration with monitor 1/2, alternatively I'd like quickly to switch to another config only with the HD TV as primary screen. A similar question has been asked 6 months back with no full solution yet, so I come up with it again. The comment there of Darius (Windows + P key) is the best so far.

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  • CA ArcServe r11.1 - have to switch Tape Drive Offline then Online to finish backup

    - by Richard
    Ill keep it brief, I have an HP Ultrium 1 in a server currently running CA ArcServe r11.1. I have 5 daily backup tapes, each of which are new. 3 of the 5 work fine without intervention but 2 of them stop at varying points through the backup asking for a new tape, even though that tape is not full. The way I have found around this is to switch the tape drive offline for 10 minutes then switch it back online, whilst the backup is still running. Has anyone ever seen this before? If so, any ideas how to permanently fix this. If all else fails just some pointers in the right direction. Thanks

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  • Should I limit end-user gigabit ports to avoid saturating uplink/trunk connections?

    - by Joel Coel
    We have a campus with 16 buildings and older 850nm 1Gbps fiber links between the buildings, that all come to a core switch for our servers that also uses 1Gbps ports. We're finally starting to replace our aging 10/100 end-user switches, and much of what we're looking at are 1 Gbps units. My question is, since the trunk/uplink lines are still 1Gbps, if I were to install 1 Gbps switches for end users, should I limit the ports to 100Mbps until I can also upgrade the trunks to avoid allowing a bad-behaving host to saturate a trunk line (since we're a college, we have plenty of mis-behaving hosts) and thereby create a DoS situation for a building, or will TCP congestion control typically take care of that for me? What if we have a lot of UDP traffic (games, video chats, even a small amount of bittorrent)?

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  • Are VLANs necessary for my environment?

    - by kleefaj
    Greetings. I'm the new network manager for a school. I've inherited an environment made up of several Windows servers, about 100 Windows clients, ten printers, one Cisco router, six Cisco switches, and 1 HP switch. Also, we're using VoIP. There are four floors in our building. The hosts on each floor are assigned to a separate VLAN. An office on the first floor has its own VLAN. All the switches are on their own VLAN. The IP phones are on their own VLAN. And the servers are on their own VLAN. For the number of hosts on the network, are all these VLANs really buying me anything? I'm new to the VLAN concept but it seems overly complicated for this environment. Or it's genius and I just don't get it. Any thoughts? Thanks, Jeff

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  • Do I need a Gigabit router with a 24Mbps down and 7Mbps upload speed cable modem?

    - by djangofan
    Do I need a Gigabit port capable wireless router with a 24Mbps down and 7Mbps upload speed cable modem? Does anyone know how to calculate this? FYI, I wont be using the wireless connection from my main computer system. My computer will connect via a hard wire into the router (of the wireless variety), which in turn is connected to the cable modem. My research suggests that the 100 Mbps port can easily handle it. Is that true?

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  • How switch between screen inside screen?

    - by André Andrade
    I have to work inside two environment. One Windows (local) and one Linux (remote). I've installed the screen linux utility in both. I'm able to open a screen on my windows, then in one tab, I opened a ssh connection to the linux remote and I start another screen. Sample linux -- |0 linux remote 0| 1 linux remote 1 windows-- |0 linux | 9 windows I can switch between "linux remote 0" and "linux remote 1" using Atl+. This is configured in .screenrc (bindkey "^[0" select 0) How could I switch to "9 windows"?

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  • Error while trying to configure VLAN with Open vSwitch

    - by Abhishek Chanda
    I am trying to connect a number of VMs using Open vSwitch. The VMs are on two separate physical boxes. Here is what I did: Created two tap devices on one physical host sudo ip tuntap add mode tap tap0 and same for tap1 Bring them up sudo ip link set tap0 up Add them as ports to Open vSwitch (br0 was created as a OVS bridge previously) sudo ovs-vsctl add-port br0 tap0 tag=1 Now I booted the VMs (using VirtualBox) and assigned addresses 192.168.122.11 and 192.168.122.12. Now when I try to ping one VM from another, I get the error Connect: network is unreachable. Since both VMs are connected to the switch on the same VLAN, I expect to be able to ping one from another. What is going wrong here?

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  • How to troubleshoot slow powerconnect 62xx management interface

    - by Hannes
    Our Dell Powerconnect 62xx switches have a very high packetloss on the management interface. I presume this is caused by a new appliance which uses multicast for communication but I am not sure. Our network setup is following: servers a - Dell PC6248 | servers b - Dell PC6248 |- juniper core router servers c - Dell PC6248 | What we see is that the multicast traffic arrives at all servers (but only the servers b use the multicast) and I fear that this multicast traffic floods the switch management interface. The switches' management interfaces are reachable via vlan101, all other traffic is sent over other vlans. When I tcpdump on one of the 2 servers with a vlan 101 ip address, I only get a few arp requests but almost nothing. When I try to ping between these 2 servers, it works like a charm. I would like to know what a good way is to troubleshoot this problem and maybe help me understand what is going wrong on that subnet.

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  • Is there a way to define a rule on a bridge that will return reply for ARP request

    - by user1495181
    client (IP = 1.1.1.1) - bridge (brctl) - server (IP = 2.2.2.2) (all machine are Ubuntu). The client block arp request. (there are multiple clients ) I need to define a rule on the bridge machine that will return the client MAC when it get ARP request for IP 1.1.1.1. I see that in ebtables there is an arpreply option , but i didnt manage to find an example to define the arpreply by given arp request ip. ebtables -t nat -A PREROUTING -p arp -j arpreply --arpreply-mac 00:09:5B:91:56:08 Can you please adcive

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  • Do I need a Gigabit router with a 24MB/s down and 7MB/s upload speed cable modem?

    - by djangofan
    Do I need a Gigabit port capable wireless router with a 24MB/s down and 7MB/s upload speed cable modem? Does anyone know how to calculate this? FYI, I wont be using the wireless connection from my main computer system. My computer will connect via a hard wire into the router (of the wireless variety), which in turn is connected to the cable modem. My research suggests that the 100 MB/s port can easily handle it. Is that true?

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