marvin Posted February 2, 2010 Posted February 2, 2010 Hi Just wondering if anyone can help on this or encountered a similar issue before? We had our network switches replaced last summer and everything has been running fine. The only problem i am having now is that i cannot find the ip addresses of the HP Procurve swicthes on DHCP. I have also tried scanning ip addresses on the network and i can find 2 of them which are listed on dhcp but the other 3 dont show up at all! The network is running fine, just that i can not get to these switches at all. Can anyone help on this? These are HP Procurve switches and we have a windows 2003 server! Thanks
Michael Posted February 2, 2010 Posted February 2, 2010 Why not telnet into them and configure the IP this way?
mac_shinobi Posted February 2, 2010 Posted February 2, 2010 Why not telnet into them and configure the IP this way? If you install spiceworks onto a client machine ( spare one or laptop ) and see if that finds them ? Still a dhcp reservation and telnetting into them and assigning each on an ip address and do it that way or as per above configure manual / static ip addys.
sted Posted February 2, 2010 Posted February 2, 2010 they show up in dhcp with no name usually iirc but they do dhcp by default. Other than that write down mac address (its on the back) add a reservation and power cycle them
keithu Posted February 2, 2010 Posted February 2, 2010 I would just plug a serial cable into the console port and talk to them with a hyperterminal or TeraTerm Pro. If you type 'menu' at the command prompt you should get a menu (oddly enough). I'm assuming these are manageable switches.
Sylv3r Posted February 2, 2010 Posted February 2, 2010 Are these assigned an IP via DHCP - have they been assigned static IP's outside of the DHCP scope? This is what we have done as it makes the switches easier to manage.
marvin Posted February 3, 2010 Author Posted February 3, 2010 These were setup by a firm so not sure but under DHCP i have Under Scope ---->Reservations the switches are on there with their IP addresses but whenever i try to access them via IE, only 2 of them responds and these are listed under DHCP as active and the others are listed under DHCP as inactive! Its almost as if they lost the original IP address and picked up some random ones but they are not listed under DHCP. Hope this makes sense
K.C.Leblanc Posted February 3, 2010 Posted February 3, 2010 I would just plug a serial cable into the console port and talk to them with a hyperterminal or TeraTerm Pro. If you type 'menu' at the command prompt you should get a menu (oddly enough). I'm assuming these are manageable switches. This, You should have your switches on static IPs anyway.
Ste_Harve Posted February 3, 2010 Posted February 3, 2010 What model switches are they? there's not a remote chance that they could be unmanaged ones could they?
nicholab Posted February 3, 2010 Posted February 3, 2010 This is easy to solve do they have a serial port? This will be on the front to the it is ether a 9 pin d-sub or on an RJ45 it will say console next to it. If you plug into this you enable or disable the ip interface and web interface.
Tunster Posted February 3, 2010 Posted February 3, 2010 (edited) Most ProCurve stuff is managable. We've got our whole site full of them and I need to do the same as the OP and static them all (long history of network mismanagement). An SNMP scanner (SoftPerfect Network Scanner: fast and free network scanner - it's freeware) will find them all and this utility works a treat! The SNMP device name will appear as something like this... ProCurve J4904A Switch 2848, revision I.08.98, ROM I.08.07 (/sw/code/build/mako(ts_08_5)) I'm starting to manage the networks IP assignments using this as a guide for what addresses are taken and not taken. I can at least start to rearrange my static IPs into different groups. Edited February 3, 2010 by Tunster grammar! 1
sted Posted February 3, 2010 Posted February 3, 2010 This, You should have your switches on static IPs anyway. meh im happy with reserved ips i dont believe in actual statics for anything other than servers as ive had to change things too often (2 networks and only the top 32 ips on curriculum can see the admin network and schools wanting sims on teachers pcs) and its easier to change a reservation and force a reboot imo These were setup by a firm so not sure but under DHCP i have Under Scope ---->Reservations the switches are on there with their IP addresses but whenever i try to access them via IE, only 2 of them responds and these are listed under DHCP as active and the others are listed under DHCP as inactive! Its almost as if they lost the original IP address and picked up some random ones but they are not listed under DHCP. Hope this makes sense id reboot them (which you need to do for the cable anyway iirc. I have had hp switches that work fine but management interface dosent respond until a reboot as if it goes ive nor been used in ages im going to sleep)
Guest Guest Posted February 3, 2010 Posted February 3, 2010 meh im happy with reserved ips i dont believe in actual statics for anything other than servers as ive had to change things too often (2 networks and only the top 32 ips on curriculum can see the admin network and schools wanting sims on teachers pcs) and its easier to change a reservation and force a reboot imo What about when you have a powercut and the switches (obviously) come up far quicker than the DHCP server? They may pick up their last IP, they may not. Maybe this is how your problem has come about? Have you powercycled them to see if they then pick up their original address? Other than that you'll have to grab your netbook (see they can be useful) and a usb-rs232 adaptor and get cracking
sted Posted February 3, 2010 Posted February 3, 2010 What about when you have a powercut and the switches (obviously) come up far quicker than the DHCP server? They may pick up their last IP, they may not. Maybe this is how your problem has come about? just reboot them again. Powercuts are for me rare enough to not worry about that much and its not like i log into the switches on a daily basis i tend to log in set igmp and tree spanning then never go in again (might on occasion flash upgrade the firmware but that i do try and do with a cable if at all possible but switches are usually in server room and server usually has a serial port just need to unplug the ups serial lead for 10 mins)
Tunster Posted February 3, 2010 Posted February 3, 2010 just reboot them again. Powercuts are for me rare enough to not worry about that much and its not like i log into the switches on a daily basis i tend to log in set igmp and tree spanning then never go in again (might on occasion flash upgrade the firmware but that i do try and do with a cable if at all possible but switches are usually in server room and server usually has a serial port just need to unplug the ups serial lead for 10 mins) But you're making more work for yourself. Also, with a DHCP switch; you may create issue if another device comes along and takes the same address (DHCP can be that stupid!) or there's a static IP from a student laptop that conflicts and knocks out any management on it. That in turn stops the student working as well. We've never had any problems so far with power cuts as they normally come back with the same address. Just for management sakes, I'd rather place all the switches in our non-DHCP static zone (which I'm very slowly doing so). Makes upgrading them all easy with a TFTP server and knowing the location. Why use a RS-232 cable to upgrade when you can do it at the comfort of your tech machine and telnet via IP?
K.C.Leblanc Posted February 3, 2010 Posted February 3, 2010 Guys, can we wait till we know if Marvin has got his issues sorted before we turn this into a debate thread.
DMcCoy Posted February 3, 2010 Posted February 3, 2010 Usually a reboot will get the procurve to pick up an address again. On occasion I've had to do a factory reset before it would pick up a dhcp address. Once I've found them I switch it to a static address. If reboot doesn't work then you can always telnet in via the serial port and see what it's up to.
Tunster Posted February 3, 2010 Posted February 3, 2010 Usually a reboot will get the procurve to pick up an address again. On occasion I've had to do a factory reset before it would pick up a dhcp address. Once I've found them I switch it to a static address. If reboot doesn't work then you can always telnet in via the serial port and see what it's up to. And that serial cable is like gold dust. Can never let it leave my sights as one of my other colleagues would more than likely nick it and then it would be missing when I need it most!
Guest Guest Posted February 3, 2010 Posted February 3, 2010 just reboot them again. Powercuts are for me rare enough to not worry about that much and its not like i log into the switches on a daily basis i tend to log in set igmp and tree spanning then never go in again (might on occasion flash upgrade the firmware but that i do try and do with a cable if at all possible but switches are usually in server room and server usually has a serial port just need to unplug the ups serial lead for 10 mins) And when one of those switches has gone potty as the result of the powercut and you've got 30 switches to run round and powercycle before you can even start troubleshooting the problem... Its not just recommended practise for the sake of it
marvin Posted February 3, 2010 Author Posted February 3, 2010 Now few things kicks in when you say powercut! Last week we had we had to switch the server off due to the some emergency electrical work going on in the building. By the time the power was back, the switches were back on before the server but i dint notice any of this as the network was running fine. But if i remember right, when i restarted teh server, i switched off 2 of the switches and turned them back on as the server was coming back up! And these are the switches that are actually showing up as active on DHCP and i can get to the login console via ip address. Now if i am correct, if i restart the other 3 switches after school today, i should be able to see them under DHCP as active?
Guest Guest Posted February 3, 2010 Posted February 3, 2010 Now few things kicks in when you say powercut! Last week we had we had to switch the server off due to the some emergency electrical work going on in the building. By the time the power was back, the switches were back on before the server but i dint notice any of this as the network was running fine. But if i remember right, when i restarted teh server, i switched off 2 of the switches and turned them back on as the server was coming back up! And these are the switches that are actually showing up as active on DHCP and i can get to the login console via ip address. Now if i am correct, if i restart the other 3 switches after school today, i should be able to see them under DHCP as active? Seems like a good bet, yes
sted Posted February 3, 2010 Posted February 3, 2010 And when one of those switches has gone potty as the result of the powercut and you've got 30 switches to run round and powercycle before you can even start troubleshooting the problem... Its not just recommended practise for the sake of it dont think ive got any school with more than 5 switches in and most have 3 at the most almost always in the same rack. I do see your point i just dont like static ips if i can avoid them
marvin Posted February 3, 2010 Author Posted February 3, 2010 A restart of those switches didnt do the trick!
maark Posted February 3, 2010 Posted February 3, 2010 try a factory reset - using 2 pens - hold clear and reset buttons in - release reset and then release clear - i think - check manual
marvin Posted February 3, 2010 Author Posted February 3, 2010 Would i not lose all it settings by reseting the switches?
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now