Wired Intelligent Edge (Campus Switching and Routing)

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Occasional Contributor II

Mitel Phones Not Receiving DHCP Address from Aruba 3810M Switch

I have one location where I am replacing several Cisco switches with several HP devices. I have one Layer3 device that is an HP/Aruba 3810M and three Layer2 Devices that are HP/Aruba 2530 - 24G 's. These switches are in a hub and spoke configuration and all of the 2530's are directly downstream of the 3810. Our Mitel phones that are connected to the downstream 2530's are pulling IP addresses and functioning properly meaning that I can make and recieve any internal or external phone calls. On the 3810, however, the mitel phones are failing to recieve an IP address. I found this reply by Harley@DSC on a different topic: 

 

If your switch supports vlans, and can be configured with a tagged and untagged vlan on an interface, it should be compatible with most or all IP Phones. 

 

Typically, the phone will either be configured manually to use the voice vlan, or will recieve (initially on the data vlan) an option from DHCP that will let it know what vlan it should start tagging things with. Once it starts tagging things with the voice vlan, the switch only needs to support vlan tagging.

 

One gotcha that I've found with Aruba switches is that by default when you enable LLDP the lldp tlv "network_policy" will be enabled. With that TLV enabled, and a "voice" vlan configured, a lot of phones will ignore what they get from DHCP in favor of what they get from there. That works fine, if you have configured it to hand out what they need, but if you prefer to use dhcp, make sure and use "no lldp config <port-range> medTlvEnable network_policy" (assuming that doesn't interfere with anything else)

 

but I am uncertain if this is my issue. I know LLDP to some degree LLDP is enabled by default, but I am not able to test this out immediatly, and I was hoping for a little more feedback before I try to tackle this task again. 

 

Thanks in advance for all the help you have and will continue to provide. You guys are awesome. 

 

Thanks, 

 

 

MVP Expert

Re: Mitel Phones Not Receiving DHCP Address from Aruba 3810M Switch

Greetings!

 

Just to clarify the issue — are the phones not getting a DHCP address on the correct VLAN, or are they not getting an IP address at all?  It might help to share a sanitized version of the configuration in question to figure out if there's a VLAN configuration issue contributing to the problem.

 

With regards to LLDP on the switch — it is enabled by default on all switch ports.



Matt Fern
Technical Marketing Engineer, Wired Intelligent Edge

Aruba, a Hewlett Packard Enterprise company

8000 FOOTHILLS BLVD  |  ROSEVILLE, CA 95747
T: 916.540.1759  |  E: mfern@hpe.com   |   Matt @ Twitter
Occasional Contributor II

Re: Mitel Phones Not Receiving DHCP Address from Aruba 3810M Switch

The Phones are not getting an IP address at all. Phones that are connected to the L2 Swtiches that come off of the 3810 do get IP address, and they are getting IP addresses from the correct VLAN. It is also important to note that the DHCP server is on the same subnet that it is handing out IP address from, so I dont think an IP Helper Address should be necessary, but I am also from a primarily cisco background and new to HP configurations. I will include a fully scrubbed config. Working for a government entity, they dont like to give out any IP information over public media. I hope it helps. Please note: vlan 15 is the voice vlan, and port 23 on this switch is what is considered the "DHCP Server". Port 23 is untagged for vlan 15. 

 

; JL073A Configuration Editor; Created on release #KB.16.06.0006
; Ver #13:4f.f8.1c.fb.7f.bf.bb.ff.7c.59.fc.7b.ff.ff.fc.ff.ff.3f.ef:49

hostname "Simms-Metro-1"
module 1 type jl073x
flexible-module A type JL083A
timesync sntp
no telnet-server
time daylight-time-rule continental-us-and-canada
ip route 0.0.0.0 0.0.0.0 X.X.X.X
ip routing
interface 22
name "MITEL_PAGING_UNIT"
exit
interface 23
name "MITEL_3300"
exit
interface 24
name "AT&T_SWITCHED_ETHERNET"
speed-duplex 100-full
exit
interface A1
name "SIMMS-AGM-1"
exit
interface A2
name "SIMMS-WELCOME-CENTER"
exit
interface A3
name "SIMMS-BACK-OFFICE"
exit
oobm
ip address dhcp-bootp
exit
vlan 1
name "DEFAULT_VLAN"
no untagged 22-23
untagged 1-21,A4
tagged 24,A1-A3
ip address X.X.X.X X.X.X.X
ip address X.X.X.X X.X.X.X
ip address X.X.X.X X.X.X.X
exit
vlan 15
name "VLAN15"
untagged 22-23
tagged 1-21,24,A1-A3
ip address X.X.X.X X.X.X.X
exit
vlan 339
name "VLAN339"
tagged 24
ip address X.X.X.X X.X.X.X
exit
no tftp server
no autorun
no dhcp config-file-update
no dhcp image-file-update
password manager
password operator

MVP Expert

Re: Mitel Phones Not Receiving DHCP Address from Aruba 3810M Switch

One thing I noticed is the voice option is missing from VLAN 15; this option explicitly defines a voice VLAN and, if missing, phones may not attach to that VLAN when connected to the switch.

 

To enable, simply run the following command:

 

switch(config)# vlan 15 voice


Matt Fern
Technical Marketing Engineer, Wired Intelligent Edge

Aruba, a Hewlett Packard Enterprise company

8000 FOOTHILLS BLVD  |  ROSEVILLE, CA 95747
T: 916.540.1759  |  E: mfern@hpe.com   |   Matt @ Twitter
Occasional Contributor II

Re: Mitel Phones Not Receiving DHCP Address from Aruba 3810M Switch

I actually thought that command was there. Do you know explicityly what that command does? I actually thought it was a command that was intended for QOS reasons, and I did not realize it changed the way a device recieved its IP address. 

Highlighted
MVP Expert

Re: Mitel Phones Not Receiving DHCP Address from Aruba 3810M Switch

The command instructs the switch to include the voice VLAN ID in the LLDP-MED TLV when a phone is connected to the switch on the appropriate port (either manually tagged, or assigned via another method such as device profile, AAA, etc), which allows the phone to discover and use that VLAN for VoIP traffic.

 

If no voice VLAN is designated, the VLAN ID in the TLV will not be populated, and the phone will not join the voice VLAN.



Matt Fern
Technical Marketing Engineer, Wired Intelligent Edge

Aruba, a Hewlett Packard Enterprise company

8000 FOOTHILLS BLVD  |  ROSEVILLE, CA 95747
T: 916.540.1759  |  E: mfern@hpe.com   |   Matt @ Twitter
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