Cisco Phones not getting IP when connected to HP E5406zl Core Switch

Hi,

I currently have Cisco 7940 phones which won't get any networking info if I connect the Cisco 1900 supplied from the phone vendor to my core switch, an HP E5406zl, so obviously the phone doesn't work.  If I connect the Cisco 1900 to any port on my HP 2920-48g-PoE+, i get an IP address, etc... all correct, except no Operational VLAN ID, and the phone works.  I've attached the running configs for both TC3 (HP 2920-48G-POE+) and the Core Switch (HP E5406zl)

Any help with this would be appreciated

Chuck
Core-switch-running-config.txt
TC3-running-config.txt
davemcclintock123Asked:
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Salah Eddine ELMRABETTechnical Lead Manager (Owner)Commented:
Hi,

Why you don't connect the Phone to the 2920 directly? why you need to connect the Cisco 1900 ?

BTW could you please post the Cisco 1900 config.

Regards.

Salah
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José MéndezCommented:
Sounds like a discovery protocol problem. The 7940s don't support LLDP, only CDP, which is Cisco proprietary

http://www.experts-exchange.com/Networking/Misc/Q_28655677.html

Maybe if you configure your phone switchports like

switchport access vlan XXX

Where XXX is the voice vlan.
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davemcclintock123Author Commented:
Salah,

I have 5 HP 2920-48G-POE+ switches uplinked to my core switch, HP E5406zl.  The 2920's will be located in Switch Closets throughout our building, but the 1900 will be in the same cabinet in my Data Center as the 5406.  So connecting to the 5406 is paramount
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davemcclintock123Author Commented:
Willywilburwonka,

HP doesn't have the switchport command, but I'll checkout the link
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José MéndezCommented:
Hey I m sorry i posted the wrong link, and BTW, I know HP has different commands, but I suspect they do similar functions like allowing 2 differnt traffic from voice and data
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davemcclintock123Author Commented:
From what I understand, the ports are data, and you configure the VLAN as Voice and tag the ports you want for Voice, that's the HP equivalent of switchport voice, which is done on a port by port basis
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Salah Eddine ELMRABETTechnical Lead Manager (Owner)Commented:
Hi,

what are the ports you used for connecting the 1900? also I'm still waiting for the 1900 Config!

I know you had previous issue regarding PING between VLANs and Trunk configuration connecting your TC3 switch to core.... so please share maximum information you may did some thing that changed the config explicitly according to the amount of actions done in your environment.

Best Regards.

Salah
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davemcclintock123Author Commented:
Salah,

Sorry, didn't get the 1900 Show Tech until late yesterday, I don't have access to the router, it's owned by our phone provider.  So I've attached the Show Tech for the Cisco 1921, Running Config for both the HP Core switch E5406zl, the HP 2920-48G-POE+ Switch, and the Cisco 3750 PoE Switch,  along with a Visio Drawing of the current layout.

Some more info about the phones:

There's no IP on them
The DHCP Server address that shows is 255.255.255.255
There's no Operational VLAN ID
I've setup an IP Helper Address of 10.91.86.1 in the core switch E5406 zl and TC3 HP 2920-48G-POE, which is the DHCP Server listed on my phone

as far as the Visio Drawing is concerned, I'm currently using the configuration on the bottom right, which is labeled as doesn't work.  If I use the configuration to the left, which is labeled as works, I can also take out TC4 and the core switch, and connect directly from either the Cisco 1921 or Cisco 3750 PoE to TC3, and that will also work, as well as bypassing the Cisco 3750 PoE and directly connecting the Cisco 1921 to TC4

Thanks

Chuck
TC3-Run-Conf-0415a.TXT
192-168-1-253-Cisco-PoE-Switch-Running-C
Core-Switch-0415-run-confl.txt
Network-Drawing.vsd
Cisco-1921---Show-Tech---10.91.86.1.docx
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Salah Eddine ELMRABETTechnical Lead Manager (Owner)Commented:
Hi,

The tech support you provided didn't include the configuration of the switch, checking the configu of your core switch and comparing the both drawing (the working one and the non working) I guess you have configured the port 8 in the TC4 switch as an uplink while the port 7 in the core switch is not! when connecting the core trought the TC4 the VLAN 160 is connected to cisco 3700 switch.

I don't know why you did this complicated setup? do you need to use the Cisco 3750 or you can bypass it?

BTW could you post the TC4 config.

Regards.

Salah
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davemcclintock123Author Commented:
Salah,

I currently need the 3750 there, so I can test.  If I disconnect the 3750 from the 1921, I take down my phone system, which we're currently using.  On Saturday I directly connected the 1921 to the test network, both to the core switch, and to TC4 and TC3.  When it was connected to the core switch, the phones didn't work, just like now.  But if I directly connected the 1921 to TC3 or TC4, then the phones worked.  If connect the 3750 to TC3 or 4 now, the phones will work, but if I have to do this when I move the test network to Production, then I have to Patch Cable the connection from the 1921 to the nearest switch closet, to connect to TC3 or 4.  The 1921 is located in my Data Center, along with the core switch E5406zl, which is why I need to get it working so I can connect the 1921 directly to the core switch

Hopefully I've been able to explain this so you can see why I need it done this way.  Also, I don't believe there's any way to configure the ports as Uplink Ports in the HP switches.  The switches labeled as Uplink, are just names I assigned, so anyone looking at them would know at a glance what they were

Thanks

Chuck
192-168-60-4-HP-2920-48G-POE--Test-Netwo
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Salah Eddine ELMRABETTechnical Lead Manager (Owner)Commented:
Hi,

Now I have a more clear idea on what you want to do, I think you get confused with previous questions you posted regarding the HP switch! also there is a difference in used terms between Cisco and HP (Trunk in Cisco means Tag in HP and Trunk in HP mean Port-Channel or aggregation in general)!

So you first need to remove all configuration on your test Core Switch and TC3, TC4...
You need to configure you test core switch will all vlans you have in the production network and add the voice VLAN 160
Configure port Tagging for all ports you will use to connect the TC switchs to Core Switch.
Configure VLAN to TC switch and specify the voice, then connect your phones

You can also use GVRP in order to get the VLAN dynamically from your core switch

More details will be found on the following links:

http://www.experts-exchange.com/Hardware/Networking_Hardware/Switches/Q_28625096.html

HP and Cisco - VLANs and Trunks Confusion!

Using GVRP (Dynamic VLANs)

Good Luck.

Salah
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davemcclintock123Author Commented:
Salah,

This is currently configured with this:

You need to configure you test core switch will all vlans you have in the production network and add the voice VLAN 160
Configure port Tagging for all ports you will use to connect the TC switchs to Core Switch.
Configure VLAN to TC switch and specify the voice, then connect your phones

Yet connecting the 1921 or 3750 (which does uplink to other switches in the production network and all the phones work there) to the test network core switch doesn't allow the phone plugged in to TC3 or TC4 to work.  No IP or VLAN info is being passed thru to the phones

Now I have one of the ports on the 3750 configured as:  

interface FastEthernet1/0/12
 switchport access vlan 160
 switchport mode access
 switchport voice vlan 160
 spanning-tree portfast

Now if I plug a PC in to that port, it gets an IP from the 1921 router.  Do you think that if I set one port on the core switch as VLAN 160 untagged, and plug a PC into that port, should it get an IP from the 1921?  All other ports in the test network are currently configured as VLAN 160 Tagged and Voice

Thanks

Chuck
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José MéndezCommented:
Just to let you know, this is the link I intended to share in my previous post:

https://supportforums.cisco.com/discussion/11787606/cisco-ip-phones-79607940-getting-data-vlan-ip

Ithink the discussion is already turning toward fixing the networking devices that support the IP Phone instead of focusing on the phone as the culprit. That is good I think, we are clear on which device to focus.

Hope you guys figure it out.
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Salah Eddine ELMRABETTechnical Lead Manager (Owner)Commented:
Hi,

In the production which VLAN you use for PC?? you need to TAG the VLAN for voice and Untag the VLAN for DATA so you can use the same cable to connect the Phone and use the second switch port from the phone to connect your PC.

Did you have a look at this question?:

http://www.experts-exchange.com/Hardware/Networking_Hardware/Switches/Q_28625096.html

Regards.

Salah
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davemcclintock123Author Commented:
Salah,

Haven't looked at the link yet, I will in a few minutes.  I use VLAN in both production and test networks.  I understand the tagging and untagging, I'll try untagging one port in the core switch as VLAN 160 untagged, and connect a PC to that port.  Hopefully I'll be able to see if it can get an IP from the phone router.  If it does, then I'll know that part works, and then the question will be, why isn't it passing this thru to the other switches...I'll read the link, and let you know how everything goes

Thanks

Chuck
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davemcclintock123Author Commented:
Salah,

First off, thanks for your help.  I just read the link, and this i understood already.  I've done a little more testing, and this is what I've discovered:

If I connect the 1921 to an ethernet port on the core switch 5406, and then I untag a port for VLAN 160 on the 5406, and then plug a PC into that port, I don't get an IP, which I should in the 10.91.86.x subnet

On TC3 2920, If I connect the 1921 to a port on TC3 or TC4 (VLAN 160 tagged), untag a second port for VLAN 160, and then plug a PC into that port, I get an IP in the 10.91.86.x subnet

Apparently, the core switch does not want to pass anything with VLAN 160, if I uplink the phone system to it thru an Ethernet port, ports 1-20.  Whereas, it will pass it thru the 10 GB ports, A21 & 22, B21 & 22, C22, if I connect the 1921 to an ethernet port on TC3 or TC4 (VLAN 160 tagged). This appears to be the issue.

Chuck
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Salah Eddine ELMRABETTechnical Lead Manager (Owner)Commented:
Hi,

Since I don't have a look on the 1900 router configuration (tech support didn't include it) I cannot check why you didn't get the IP, also I didn't follow all your configuration files (for HP switchs) in deep I just focused on the connected ports described on the layout.

For more understanding about HP switchs, here is training document:

http://sdste.k12.sd.us/members/AOS%20Documentation/Student-Guide_Get-Start-w-Switch-and-Route_v9.41_ILT.pdf

Best Regards.

Salah
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davemcclintock123Author Commented:
We found that there were a few issues:

1)  The Cisco 3750, which was in between the Cisco 1921 and the HP E5406zl, needed to have the port uplinked to the HP as a Trunk Port

2)  There's an issue with Cisco 7940/60 phones and HP switches.  The 7940/60 phones need to have the VLAN ID manually configured.  Cisco 7941/61 phones are able to get the VLAN ID dynamically

Everything works now, although I pushed HP Support to its limits

Thanks for all your input

Chuck
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davemcclintock123Author Commented:
HP Support found the issue
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