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6248P VOIP And Trunk Issue
Hi,
I am swapping out a old Linksys switch that has our phones and I am looking to VLAN our phones and PCs on the 6248P switch.
I have setup the 6248P to have VLAN1 as PC's and VLAN101 as the Voice. Tagged 101 on the port 40 which I am testing and left VLAN1 as untagged.
I have enabled Voice VLAN and assigned the VLAN ID to 101 then on the port settings change VLAN mode general and assigned PVID to 101.
Port 47 is the trunking port and I have set this as the trunk port however the phone does not get a IP Address from the Cisco 800. I am just changing the link from the Linksys to the dell to test but it does not work.
Can you advise me on the settings the for Trunk and if that's correct on what I have done.
I am quite a newb on networking but hopefully it makes sense above
Anonymous
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September 30th, 2015 08:00
On the phone you may need to check and be sure that LDDP-MED is enabled. Then enabled VLAN and set the VLAN ID on the phone to VLAN 101. Here is a link on how to achieve these settings.
http://bit.ly/1MG4x2h
Once those setting are set the phone will advertise to the switch and should be placed on the voice VLAN. If the phone does not hear an acknowledgement back, it will then send tagged frames for VLAN 101. Either way the end result will be that the phone is on VLAN 101.
Let us know if this works.
Cheers
Anonymous
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September 24th, 2015 07:00
Here are some points to keep in mind when enabling Voice VLAN.
• Voice VLAN should be configured on the interface.
• LLDP-MED needs to be operational on the port.
• Configured Voice VLAN should be one of the active VLANs from the dot1q database.
• The port should be authorized and link is active.
• The port should not be part of a Guest VLAN or LAG interface.
And here is an example of what the port configuration would look like for the phone connection.
console(config)# interface ethernet 1/g10
console(config-if)# spanning-tree portfast
console(config-if)# switchport mode general
console(config-if)# switchport general pvid 1
console(config-if)# switchport general allowed vlan add 1
console(config-if)# switchport general allowed vlan add 101 tagged
console(config-if)# lldp transmit-mgmt
console(config-if)# lldp notification
console(config-if)# lldp med
console(config-if)# lldp med confignotification
console(config-if)# lldp med transmit-tlv inventory
console(config-if)# voice vlan 101
console(config-if)# voice vlan auth disable
For your switch to switch connection the configuration would be:
console(config)# interface ethernet 1/e47
console(config-if)# switchport mode trunk
console(config-if)# switchport trunk allowed vlan add 101
If that is not allowing traffic to traverse the connection, you can try General mode.
console(config)# interface ethernet 1/e7
console(config-if)# switchport mode general
console(config-if)# switchport general allowed vlan add 101 tagged
Let us know if this helps out.
Basscom
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September 24th, 2015 18:00
That's awesome - I am not in the office today but back in on Tuesday so will attempt the change then. and will let you know. many thanks for giving the whole config!!
Basscom
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September 28th, 2015 19:00
Hi, I tested this today and it partly worked. However the Cisco 800 is managed by the phone company and does give a DHCP range of 172.20.132.x when plugged into the old switch however when plugging into the dell switch i pickup my dhcp range for the computers which the server is dishing out.
Anonymous
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September 29th, 2015 07:00
Just to confirm, do the workstations plug into the phones? It sounds like the phones ended up on the untagged VLAN 1. What model phone is being used?
Basscom
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September 29th, 2015 18:00
Yes that's correct. Model phone is Cisco SPA504G. I have spoken to the hosted phone provider and they don't support this with Dell switches so I may have to leave it!
Basscom
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September 30th, 2015 20:00
Hi,
That worked perfectly - thanks very much for all your help and quick assistance!!!
Anonymous
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October 1st, 2015 12:00
Good to hear, thanks for the update.