Network issues.

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Teanz

9 posts

Wannabe Geek

#129184 6-Sep-2013 08:59

Hi,

Hopefully I'm not over stepping any boundaries asking for some help on my first post here. I work for a small company that has had telecom come in and setup our VOIP and LAN it works fine apart from a couple of issues which telecom doesn't seem keen on fixing.

When we connect a new printer by wireless they show up as a connected device with an IP address on the Telecom Pace V5542 and can be pinged through the Paces interface, however when we try and connect to them from a desktop/laptop also connected by wireless to the Pace they cannot be pinged or seen for around 12 hours then they start responding and can be used - problem here is they like to drop off randomly again so we can loose the printers for a day randomly.

Current connected laptops also cannot ping each other but still have access to the internet. I connected a laptop by Ethernet as well just to see if that would make a difference at all which it didn't, it was dished out an IP address and could access the internet but couldn't be pinged.

I don't have alot of experience with networking so I'm a tad stumped, our Business hub rep has suggested to call an I.T company which to me doesn't seem to be an acceptable answer seeing as they were in-charge of the setup.

The gear that we have is VDSL > Telecom Pace router (all laptops printers connected wireless) > IPECS POE Switch for the VOIP phones > Connected to this switch is the PBX and Cisco 1941 Router which has a 5mb line for the VOIP traffic.

DHCP is controlled by the Pace

If anyone has any input it would be appreciated

RunningMan

8953 posts

Uber Geek

#890741 6-Sep-2013 09:10

Welcome.

Can two devices connected by wired ethernet ping each other? If so, check for a "wireless isolation" or similar setting in the WiFI setup that prevents WiFi clients from seeing other local network devices.

Teanz

9 posts

Wannabe Geek

#890820 6-Sep-2013 11:36

I've plugged 2 laptops into the switch and pinged from one to the other. I could ping from the first laptop to the second, but not from the second laptop to the first and it doesn't look like the Pace has any wifi isolation ability. I can ping any of our VOIP phones from a laptop connected via wireless as well just thought that might be worth mentioning.

Teanz

9 posts

Wannabe Geek

#890832 6-Sep-2013 11:53

Hmm

Well now I feel rather stupid. Just noted that when you do a DNSquery the laptop responds and it seems windows 8 firewall disables ping requests by default. This doesn't explain why the printers take overnight to be accessed when the Pace can ping them as soon as they are connected.

Mattmannz

471 posts

Ultimate Geek

#891068 6-Sep-2013 19:22

Sounds like a windows firewall issue. Can you disable the firewall and retest? Its possible that windows is applying a public network policy that is very restrictive to the wireless.

Matt.

Teanz

9 posts

Wannabe Geek

#891119 6-Sep-2013 21:45

Yea when I figured out the firewall was blocking the pings I disabled it and gave it a go to no avail :( What I could do was use NAT to forward port 80 to the printers IP and could access the web interface that way. Just to actually check it was working, which it was.

Could the Cisco Router have anything to do with it? its meant to only route the VOIP side of things but also seems to play a role with NAT as we are unable to setup any sort of remote access, it works fine once the port is forwarded if you connect to the external IP address while on the LAN but not externally :/ and telecom advised they would charge $200 to forward a port on the router.

Mattmannz

471 posts

Ultimate Geek

#891120 6-Sep-2013 21:48

Sounds like the wired and wireless are on different segments and possibly subject some sort of router based firewalling.

Can you post the IP details from the two segments?

webwat

2036 posts

Uber Geek

Trusted

#892159 9-Sep-2013 15:17

Does the cisco also do any DHCP that its not supposed to? Try plugging the printer into a different switch and see what happens.

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Teanz

9 posts

Wannabe Geek

#892788 10-Sep-2013 15:29

Sorry for the delayed replies haven't had access to the printer it was locked away and I managed to drop it off the network through the web interface.

I've since moved the printer to my desk and have plugged it in via Ethernet into the Telecom Pace directly and pinged it fine I then plugged it into the switch and it once again worked fine.

So working off that I got a laptop and plugged it via Ethernet and pinged a wireless laptop fine (and vice versa) as soon as i moved it off Ethernet and connected it wireless it was unable to communicate with any laptop connected by wireless.

It seems there is some form of isolation occurring that shouldn't be The devices can communicate with the telecom pace when connected so have access to the internet but that's as far as it gets there just no wireless to wireless communication.

BUT (I know always a but) I have a second printer that is connected wireless that is working (but has a 400ms reply time) this printer used to do exactly what the current one is doing and it then randomly started working.

As for the Cisco router doing DHCP it appears not the Telecom pace is managing a range and all the IP phones are just assigned a static IP on the same subnet not in that range.

I appreciate the feedback thus far thanks. *edit* Here's a Ping from the Telecom Pace to the printer on 192.168.1.120

and here's one from my laptop to the printer (connected via wireless)

Mattmannz

471 posts

Ultimate Geek

#892902 10-Sep-2013 20:06

You need to supply more info to get some help. Note down the subnet and gateway details for all the segments as a starter.

Foiler

220 posts

Master Geek

#892976 10-Sep-2013 22:36

The "Host unreachable" message is coming from 192.168.1.125 - is that the Pace router? If not then maybe that IP belongs to another router that mistakenly has DHCP enabled?

Teanz

9 posts

Wannabe Geek

#894141 11-Sep-2013 11:15

192.168.1.125 was my laptop.

I've put in a workaround which is suitable for now so I'll consider it resolved and just work on it in my spare time. I've put in another router that creates a WAN link on a different subnet and as its connected via Ethernet there's no issue with connecting the printer to that router via wireless. I've then created a static route to link the two subnets and alls well for now.

Thanks for your feedback guys appreciate the time.

Inphinity

2780 posts

Uber Geek

#894155 11-Sep-2013 11:31

Foiler: The "Host unreachable" message is coming from 192.168.1.125 - is that the Pace router? If not then maybe that IP belongs to another router that mistakenly has DHCP enabled?

.125 is most likely the laptops own IP address. Destination host unreachable probably means it failed to do an ARP lookup for the address, so it never gets to the point of trying an ICMP request (which would return a request timed out if it got this far and couldn't ping). This is probably a security/firewall setting on the router, but without seeing all the config, it's hard to know what exactly is set.

Foiler

220 posts

Master Geek

#894156 11-Sep-2013 11:32

hopefully those shocking ping times to the printer have come right with your workaround ..

Mattmannz

471 posts

Ultimate Geek

#894307 11-Sep-2013 15:01

Where abouts are you based? If local to me Wgtn/Kapiti/Manawatu I could call in and have a look.

Talk to Telecom and get them to provide you a basic diagram for the service they have provided including addressing etc and we can advise further. If they won't do that then it's time to ditch them and get another provider.

Cheers
Matt.

Teanz

9 posts

Wannabe Geek

#895296 13-Sep-2013 15:13

Thanks for the offer Matt but were in Central Otago :)

Have started making a little bit of a headway with telecom and will be testing a few things this weekend.