[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 2127
  • Last Modified:

HP 2620 - Voice VLAN across multiple switches

Hi All.  I am in the process of configuring a bunch of HP switches along with a phone system.  The goal is to have the phone system hand out DHCP addresses to phones, and have the rest of the devices plugged into this network receive DHCP from another DHCP server.  Right now, I am trying to get this working across 2 switches, but there will eventually be more.

The phone system is attached directly to switch A.  There is also another DHCP server attached to one of the ports on switch A.  When I plug a device into one of the ports on switch A, everything seems to work as expected.  If it is a phone, it's assigned to the voice VLAN (VLAN 10), and gets a DHCP address from the phone system.  If it is another device, it stays in the default VLAN (VLAN 1), and gets its address from the other DHCP server.

The problem occurs when I plug a device into switch B.  If it is a non-phone device, it gets DHCP from the regular DHCP server as normal.  If it is a phone, it's moved to VLAN 10, but it's unable to get an address from the phone system.  Both switch A and switch B are plugged into another Netgear switch, which is what joins all of the switches.  My question is, if the phones are moved to VLAN 10 when plugged into switch A or switch B, why do they only receive DHCP when they're plugged into switch A?

Here is the config for switch A:
hostname "FLOOR4-MDF-0"
time timezone -300
no stack
interface 2
   speed-duplex 100-full
exit
ip default-gateway 10.1.4.1
ip routing
vlan 1
   name "DEFAULT_VLAN"
   untagged 1-20,25-28
   ip address 10.1.5.40 255.255.0.0
   no untagged 21-24
   exit
vlan 10
   name "Voice"
   untagged 21-24
   tagged 1-20,25-28
   voice
   no ip address
   exit
qos type-of-service diff-services
snmp-server community "public" unrestricted
management-vlan 1
no dhcp config-file-update
password manager


And here is the config for switch B:

hostname "FLOOR4-MDF-1"
time timezone -300
no stack
ip default-gateway 10.1.4.1
ip routing
vlan 1
   name "DEFAULT_VLAN"
   untagged 1-28
   ip address 10.1.5.41 255.255.0.0
   exit
vlan 10
   name "Voice"
   tagged 1-28
   voice
   no ip address
   exit
qos type-of-service diff-services
snmp-server community "public" unrestricted
no dhcp config-file-update
password manager

Thanks!
0
ClearBlueTechnologies
Asked:
ClearBlueTechnologies
  • 3
  • 2
1 Solution
 
JAN PAKULACommented:
it doesn't seem that you have any trunking ports between those switches.

You will need that to for vlan 10 data to pass through as a tagged  packet

http://sdste.k12.sd.us/members/AOS%20Documentation/Switch_Software_operation_guide.pdf

JAN MA CCNA
0
 
ClearBlueTechnologiesAuthor Commented:
it doesn't seem that you have any trunking ports between those switches.

You will need that to for vlan 10 data to pass through as a tagged  packet


Thanks for the reply.  From what I've read today, HP has a different meaning for the word "trunk" than other vendors.  The way to carry data for multiple vlans on an HP is to use "tagging", because HP refers to the word "trunk" as aggregating multiple ports on one link.  Port 26 is the one that each of my HP switches uses to connect to the Netgear, so I would think my tagged commands would cover that.  Please correct me if I'm wrong.
0
 
JAN PAKULACommented:
you are right - how looks configuration of your netgear switch?

http://2and2is5.wordpress.com/2011/02/05/trunking-between-cisco-and-hp-switches/
0
 
ClearBlueTechnologiesAuthor Commented:
you are right - how looks configuration of your netgear switch?

I actually didn't have access to that netgear at the time, but I'll try to have a look at it today.  I can't imagine what could be happening on that switch that could prevent VLAN information from being passed around, so I'm thinking it's more likely a problem with how I've configured my VLANs.
0
 
ClearBlueTechnologiesAuthor Commented:
you are right - how looks configuration of your netgear switch?

It actually turned out to be an issue with the netgear switch having it's own vlan configuration, and not preserving my vlan 10 tags as they were passing from switch to switch.
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

  • 3
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now