Solved Network switch connected to switch doesn't work

January 18, 2012 at 16:49:55
Specs: DEBIAN UBUNTU FEDORA, 2.4 GHz/4GB
I have a Nortel 48port layer2 switch. All desktops connected to its ports are working just fine. Due to shortage of ports I tried to connect a Netgear 8-port switch to one of the ports on Nortel. For some reason it doesn't seem to work. Can anyone assist what could be wrong?

Many thanks in advance for your help.

Ivan

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✔ Best Answer
January 26, 2012 at 09:23:27
Well, if Port two is configured as the link to your other switch it's obvious what the problem is.

Port two shows PVID = 96

You told me the only VLAN you had configured on the switch was 9

If Port two is the uplink to the other switch, change the PVID to 9 and ensure 9 is also in the "allowed VLAN's" and it should work.

As I suggested earlier, if you reset the unit to factory defaults, it would work. This would apply VLAN 1 (the default VLAN) to all ports. Since you don't have need for multiple VLAN's I would suggest doing this to simplify setup and configuration.

Unfortunately I can't reset it to factory defaults as I might lose connection to default gateway and therefore all other services like email, internet etc

Write down your IP configuration information (IP address Subnet Mask, Default Gateway, etc) and after the reset, configure that first. Just understand that if you don't have a console cable, then you won't be able to get back into it as a console cable is the only way to access the management interface on one of these switches once it's been reset to defaults.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***



#1
January 19, 2012 at 14:16:06
What model Nortel switch?

Are VLAN's configured on this switch or is it all just set to defaults (ie: VLAN 1 on all ports)?

How is the port on the Nortel that the 8 port switch connects to configured?

Did you use a crossover cable?

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#2
January 20, 2012 at 01:07:29
Thanks for the reply Curt. It is a Nortel 5510-48T. There is just one vlan on all ports i.e. vlan9. I haven't changed the default configuration of the port. Do you want me to check its certain parameters/settings? I am using straight cable and not cross over.

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#3
January 20, 2012 at 07:23:18
I happen to be very familiar with the Baystack 5500 series. We have many 5510's and 5520's in our environment and have lately been buying 5632's and 5698's. But I digress...........

While not absolutely necessary any more, it's always best to use a crossover cable when connecting like devices. So I highly recommend you use a crossover as your uplink cable between switches.

The only settings I can think of that you will want are to have the interface set to "Access"

If you've changed it from Access to "trunk", "untag PVID only", or "tagPVIDonly" it won't work.

I'm not sure if you're using the Java Device manager or the web browser to connect. If you're using JDM, connect to the switch and right click on the port in question and select "Edit" from the menu. Then in the window that opens up, click on the VLAN tab to check the port settings I'm talking about. You should have "1" as your PVID and under "VlanIds" the only VLAN showing should be 1. For "Type" the radio button beside "Access" should be enabled.

From the web browser (pre v6.2 SW/FW), go to:

Applications >> VLAN >> Port Configuration

Then check the port you're using. It should show the following:
PVID = 1
Tagging = Untag All

To check and ensure you have only VLAN 1 added to that port, click on:

Applications >> VLAN >> Port Information

and choose the appropriate port and click Submit.

If you are running v6.2 or higher SW/FW connect with your web browser (EDM) and after logging in click on the "Device Physical View" tab and then right click on the appropriate port and select "Edit" from the menu and then click on the VLAN tab to check those settings.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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Related Solutions

#4
January 20, 2012 at 15:45:17
Thanks again Curt. Actually this switch has arrived from our head office very recently and as you can see i'm not familiar with it at all :( I dont think it has got a web interface configured since it is not accessible thru web browser. I only access it thru telnet. I am not familiar with java device manager too. Is it available for download somewhere? Also, is it quick and easy to enable web interface?
Since all switches are auto-uplink these days I didn't worry about the cable type but now I will try cross-over cable as well. I will try it on Monday.

Many thanks!

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#5
January 22, 2012 at 07:25:09
You have to enable HTTP access. From the telnet go to "Telnet/SNMP/Web Access Configuration" and enable web access, then you'll be able to login via your web browser.

As for JDM, that was a tool Nortel developed if I'm remembering correctly. You might try the Nortel website for it. JDM = java device manager. Look under the 55xx Network Switches.

Now that Avaya has bought them out, they (Avaya) have done away with JDM and you can only access them via telnet and HTTP.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#6
January 23, 2012 at 22:29:12
Curt, I tried cross-over cable but that didn't work as well. I have enabled web access but I cant login since I dont know the username and password. I know the telnet password and can login without any issues. Do you know whats the default username and password for web access? Do you know how to reset them?

I couldn't find the JDM as well. Any chance you could share it on the web if you have a copy?

Cheers,

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#7
January 24, 2012 at 07:24:07
Perhaps the problem is your change to the VLAN assignment then. I have no idea why you're using VLAN 9 when your switch is just configured as a switch (ie: you're not using multiple VLAN's. Changing from VLAN 1 to any other VLAN is going to cause issues. That's likely what's causing this issue.

I suggest you save the existing configuration and then reset the unit to factory defaults and leave it as VLAN 1 only and do not configure any other VLAN's.

Login information (usernam/password) should be the same for both telnet and web sessions. It's possible you haven't set the password information yet so you may have to do that. From the main telnet menu click on "Console/Comm Port Configuration" Then set the "Telnet/WEB Switch Password Type" to "Local Password" Once you'ev done that, the exact same login information should now work for the Web sessions.

What version FW/SW are you using? When you first telnet into the switch you get the "Nortel" Logo under it you should see that info. Please let me know what your switch is using.

As for the JDM, I just checked and the most recent version we have (jdm_6214.exe) is 214 MB's and I have no way to send that to you so I had a quick look online and I found it on Avaya's website (they bought out Nortel's network appliances) at the following link:

https://support.avaya.com/css/appma...

Click on the "downloads" tab and grab the file that I named above.

Avaya says to not use the JDM on any switches running v6.2 or newer SW.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#8
January 24, 2012 at 16:33:53
Hi Curt, I have been able to log into the web interface now. Found that there are two default usernames i.e. "RW" and "RO". Now I can login with RW account.

System Information shows following info:
Ethernet Routing Switch 5510-48T HW:05 FW:5.0.0.4 SW:v5.1.1.016 BN:16 (c) Nortel Networks

Application > VLAN > Port Configuration shows following information.

All ports have following configuration except Port 1 and 2:

Filter Untagged Frames: No
Filter Unregistered Frames: Yes
PVID: 9
Port Priority: 0
Tagging: Untag All

Port 1 (connected to Cisco router):
Filter Untagged Frames: No
Filter Unregistered Frames: Yes
PVID: 9
Port Priority: 0
Tagging: Tag All


Port 2 (connected to riverbed):
Filter Untagged Frames: No
Filter Unregistered Frames: Yes
PVID: 96
Port Priority: 0
Tagging: Untag All

I am not sure what has been configured here. Does the mentioned info help what's causing the problem? Unfortunately I can't reset it to factory defaults as I might lose connection to default gateway and therefore all other services like email, internet etc

Many thanks for your help Curt.

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#9
January 26, 2012 at 09:23:27
✔ Best Answer
Well, if Port two is configured as the link to your other switch it's obvious what the problem is.

Port two shows PVID = 96

You told me the only VLAN you had configured on the switch was 9

If Port two is the uplink to the other switch, change the PVID to 9 and ensure 9 is also in the "allowed VLAN's" and it should work.

As I suggested earlier, if you reset the unit to factory defaults, it would work. This would apply VLAN 1 (the default VLAN) to all ports. Since you don't have need for multiple VLAN's I would suggest doing this to simplify setup and configuration.

Unfortunately I can't reset it to factory defaults as I might lose connection to default gateway and therefore all other services like email, internet etc

Write down your IP configuration information (IP address Subnet Mask, Default Gateway, etc) and after the reset, configure that first. Just understand that if you don't have a console cable, then you won't be able to get back into it as a console cable is the only way to access the management interface on one of these switches once it's been reset to defaults.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#10
January 26, 2012 at 20:18:30
Hi Curt, The problem seems to be fixed now as I just rebooted the switch.

Sorry about the confusion, to be honest I didn't know about PVID:96 as well until I got the web access.

I really appreciate your help mate.

Best regards,

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#11
January 27, 2012 at 04:40:32
My pleasure.

I still recommend you download the JDM and have a look at it. That's my preferred tool for day-to-day maintenance of the switches and it works perfectly what that version of the SW/FW.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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