atcomsystems.ca/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems IPO500V2 Vlan Tagging

I am getting ready to install my first multi-site networked IPO. I had a meeting with the data guy for my customers site today and was working out the details of the circuit. He wants to have a seperate vlan for voice and data. Voice=Vlan 01, Data=Vlan 02. Now for my question, is there any way to do vlan tagging on the ipo so that the carrier can pass the voice traffic through as a priority? If I can do this just on the IPO that would be great. If I have to pass it through another device I can work with that too. If someone can help me with this issue I would greatly appreciate it! Thanks.

Who has control of the routers?
You, the customer or the carrier?

The routers on site are taken care of by the data vendor. But I can work with him on what I need.

Have them set up QOS on the routers along with full duplex.

Ok, so I'm still a little new to all of this. How exactly is this going to solve my problem?

Here is the Diffserve setting from the help file:

DiffServ Settings
When transporting voice over low speed links it is possible for normal data packets (1500 byte packets) to prevent or delay voice packets (typically 67 or 31 bytes) from getting across the link. This can cause unacceptable speech quality. Therefore it is important that all traffic routers and switches in a network to have some form of Quality of Service mechanism (QoS). QoS routers are essential to ensure low speech latency and to maintain sufficient audible quality.

· IP Office supports the DiffServ (RFC2474) QoS mechanism. This uses a Type of Service (ToS) field in the IP packet header. The IP Office uses this field to prioritize voice and voice signaling packets on its WAN interfaces. Note that the IP Office does not perform QoS for its Ethernet ports including the WAN Ethernet port on the Small Office Edition.

· The hex and decimal entry fields for the following values are linked, the hex value being equal to the decimal multiplied by 4.

· DSCP (Hex): Default = B8 (Hex)/46 (decimal), Range = 00 to FC (Hex)/0 to 63 (decimal)
The DiffServ Code Point (DSCP) setting applied to VoIP calls. For correct operation, especially over WAN links, the same value should be set at both ends.

· DSCP Mask (Hex): Default = FC (Hex)/63 (decimal), Range = 00 to FC (Hex)/0 to 63 (decimal)
Allows a mask to be applied to packets for the DSCP value.

· SIG DSCP (Hex): Default = 88 (Hex)/34 (decimal), Range = 00 to FC (Hex)/0 to 63 (decimal)
This setting is used to prioritize VoIP call signaling.


So he can set the diffserv settings to match, and we are all happy little campers....

Ok, I'll talk to him about these settings. Thanks for your help.