ava with external dhcp server

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Automatic VLAN Assignment Configuration Example

April 05

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AVA Ed01 2All rights reserved 2005, Alcatel

Introduction

What is Automatic VLAN Assignment (AVA) ?

128.2.0.0 /16 128.3.0.0 /16

128.4.0.0 /16128.1.0.0 /16

VLAN 20 VLAN 30

VLAN 10VLAN 40

VLAN?

IP Touch/IP Phone

An easy way to assign a VLAN number (Tag) to an IP Touch/IP phone

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Automatic VLAN Assignment (AVA)

What are the benefits of AVA ? An automatic process that makes IP-Phone deployment easier

No Tag configuration to enter on each phone set Allows Voice/Data traffic split (PC cascaded behind an IP-Phone)

- Broadcast domain separation- QOS (Voice prioritization over Data)

Network Switch

802.1q port

VLAN 1 (Default)

VLAN 3(Voice VLAN)

PCIP-phone

VLAN 6

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Introduction

How AVA works ?

AVA is based on a double DHCP request to a Communication Server Phase 1 : AVA process to get the Voice VLAN ID Phase 2 : Standard DHCP process to obtain the IP address

in the Voice VLAN

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Automatic VLAN Assignment (AVA) : Principle

Two Phases for the Automatic VLAN Assignment (AVA) Phase 1 : AVA Process Phase 2 : DHCP process

AVA Process

DHCP Process

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AVA process : DHCP Discover

Initial Status PC and IP-Touch phone are cascaded on the same Data Switch port

(OS 6648) belonging to the Default VLAN (1) The Appliance Server acts as a DHCP/AVA Server

Phase 1 step 1 The IP-Phone 4035 sends a DHCP Discover (Broadcast)

that is forwarded to VLAN6 by the DHCP relay agent

AVA/DHCP Server

VLAN 1

DHCP discoverVLAN 6

VLAN 3

Virtual Routers

192.168.46.80

OS6648

DHCP Relay Agent

Virtual RoutersVLAN 1 10.10.10.1VLAN 3 128.120.50.1VLAN 6 192.168.46.1

IP Touch 4038/4068or IP-Phone 4035

PC

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AVA process: DHCP Discover

Phase 1 step 1 DHCP Discoverfrom IP-phone

4035

No Tagging

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AVA : DHCP Offer

Phase 1 step 2 The Appliance Server (DHCP Server + AVA Server) replies with a

DHCP offer This offer contains a dummy address and asks the IP-phone to

Tag its traffic (tag value is 3 for this configuration).

AVA/DHCP Server

DHCP range for VLAN 110.10.10.10 - 10.10.10.10

Dummy IP @ 10.10.10.254VLAN 1

PC

DHCP offer VLAN 4

VLAN 3

Virtual Routers

(use Tag 3 !!!)

OS6648


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AVA process (4035): DHCP Offer

Source:DHCP/AVA server

192.168.46.80forwarded by Relay Agent10.10.10.1

Dummy address 10.10.10.254

Phase 1 step 2 DHCP Offerfrom Appliance

Server

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AVA process: Second DHCP Discover

Phase 2 step 1 The IP-Phone 4035 sends a 2nd DHCP Discover using a VLAN Tag 3 As a result this Tagged DHCP discover will go directly to VLAN 3

AVA/DHCP Server

VLAN 1

2nd DHCP Discover

IP-phone Traffic=> Tag 3

PC

2nd DHCPdiscover(Tag 3)

VLAN 4

VLAN 3

Virtual Routers OS6624

192.168.46.80

OS6624 port 2/2In 802.1q


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DHCP process: Second DHCP Discover

Phase 2 step 1 DHCP Discoverfrom IP-phone

4035

Tagging (Tag = 3)

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DHCP process : 2nd DHCP Offer

Automatic VLAN Assignment (AVA) Phase 2 step 2

A DHCP Offer (with Tag 3) is sent by the AVA/DHCP server This offer contains an IP address (taken in the VLAN 3 DHCP range)

AVA/DHCP Server

VLAN 1

PC

2nd DHCPOffer (Tag 3)IP @ 128.120.50.10

VLAN 4

VLAN 3


128.20.50.81

OS6624 port 2/2In 802.1q

2nd DHCP Offer

DHCP IP@ in VLAN 3=> 128.120.50.10


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DHCP process : 2nd DHCP Offer

Phase 2 step 2 DHCP Offerfrom Appliance

Server

Source:DHCP/AVA server

128.120.50.80forwarded by Relay Agent128.120.50.1

VLAN 3 IP address 128.120.50.10

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DHCP process : DHCP Request

Phase 2 step 3 A DHCP Request (with Tag 3) is sent by the IP-phone to get the

proposed DHCP IP @

AVA/DHCP Server

VLAN 1

PC

DHCP Request(Tag 3)

VLAN 4

VLAN 3


192.168.46.80

OS6624 port 2/2In 802.1q

DHCP Request

=> Tag 3

I want to get the IP @ 128.120.50.10 !!!


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DHCP process : DHCP Request

Phase 2 step 3 2nd DHCP Request from the IP-phoneto get the proposedIP address in

VLAN 3128.120.50.10

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DHCP process : DHCP Ack

Phase 2 step 4 A DHCP Ack (with Tag 3) is sent by the Comm Server to confirm the

proposed DHCP IP address

AVA/DHCP Server

VLAN 1

PC

DHCP Ack(Tag 3)

VLAN 4

VLAN 3


192.168.46.80

OS6624 port 2/2In 802.1q

DHCP Ack

=> Tag 3

Please find the requested IP @ 128.120.50.10 !!!


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DHCP process : DHCP Ack

Phase 2 step 4 DHCP Ackfrom Com Server

Tagging (Tag = 3)

Confirmationof the DHCP @

attribution(128.120.50.10)

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Comm Server configuration for AVA

Comm Server Software Release : R6.1-f2.400

Instances: All Subnetworksx xx -> x xx xx x

Consult/Modify: All Subnetworksx xx Node Number (reserved) : 1 xx DHCP configuration : 1 xx xx Subnetwork xx xx Subnet address : 10.0.0.0 xx Netmask : 255.0.0.0 xx xx Broadcast address : 10.255.255.255 xx Default router address : 10.10.10.1 xx TFTP server address : 192.168.46.80 xx VLAN ID : 3 xx VLAN Address : 10.10.10.254 Dummy address

VLAN Tag ID

AVA process

Default VLAN

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Comm Server DHCP rangesConsult/Modify: IP Addressesx xx Node Number (reserved) : 1 xx DHCP configuration : 1 xx xx Subnetwork xx Subnet address : 10.0.0.0 xx Netmask : 255.0.0.0 xx xx Range first address : 10.10.10.10 xx Range last address : 10.10.10.10 x

Not used but required

Default VLAN (1)

Consult/Modify: IP Addresses Rangex xx Node Number (reserved) : 1 xx DHCP configuration : 1 xx xx Subnetwork xx xx Subnet address : 128.120.0.0 xx Netmask : 255.255.0.0 xx xx Range first address : 128.120.50.10 xx Range last address : 128.120.50.20 x

Used by 4035 & 4068 sets

VLAN 3

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Association between Mac Address and IP address Consult/Modify: Tsc Ip Userx xx Node Number (reserved) : 1 xx Directory Number : 3003 xx Directory Number : 3003 xx Set Type + IPTouch 4068 xx Voice Coding Algorithm + Default xx Terminal Ethernet Address : 00:80:9f:56:07:2b xx IP Address : 128.120.50.15 xx IP Domain Number : 0 xx Use of volume in system + YES x

Consult/Modify: Tsc Ip Userx xx Node Number (reserved) : 1 xx Directory Number : 3005 xx Directory Number : 3005 xx Set Type + 4037 (4035 & TSC IP) xx Voice Coding Algorithm + Default xx Terminal Ethernet Address : 00:80:9f:3d:0f:68 xx IP Address : 128.120.50.10 xx IP Domain Number : 0 xx Use of volume in system + YES x

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Leased IP addresses

12.DHCP server configuration============================

1. 'Activate DHCP server'2. 'View configuration'3. 'View IP addresses currently used'4. 'Add IP address or range'5. 'Update advanced parameters'6. 'Delete an IP address or range'0. 'Previous menu'

What is your choice ? 3

+--------------------------------------------------------------------+| IP address | MAC address | Expiry date (GMT) | Status |+--------------------------------------------------------------------+| 128.120.50.15 | 00:80:9f:56:07:2b | 2005/02/24 11:34:45 | USED || 128.120.50.10 | 00:80:9f:3d:0f:68 | 2005/02/24 11:25:35 | USED |+--------------------------------------------------------------------+

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QOS: TOS/802.1p

The IP Phone QoS configuration is defined on the Comm Server:

The 802.1p (layer 2) &/or DSCP (Layer 3) parameters are handled by the

IP-Touch / IP-Phone

Modify: IP Quality of service Categoryx xx Node Number (reserved) : 1 xx Instance (reserved) : 1 xx IP Quality of service Category Id : 0 xx xx 802.1Q used + True xx 802.1Q priority : 5 xx VLAN ID : 1 xx TOS/diffServ : 40 xx UDP Lost : 7 xx UDP Lost Reinit : 7 xx UDP Keep Alive : 15 xx x

802.1p

TOS/DSCP

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OS6624 configuration for AVA

Please refer to Tech Tip 2050 for theOmniSwitch 6600 configuration

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THANK YOUTHANK YOU

Automatic VLAN Assignment Configuration ExampleIntroductionAutomatic VLAN Assignment (AVA)IntroductionAutomatic VLAN Assignment (AVA) : PrincipleAVA process : DHCP DiscoverAVA process: DHCP DiscoverAVA : DHCP OfferAVA process (4035): DHCP OfferAVA process: Second DHCP DiscoverDHCP process: Second DHCP DiscoverDHCP process : 2nd DHCP OfferDHCP process : 2nd DHCP OfferDHCP process : DHCP RequestDHCP process : DHCP RequestDHCP process : DHCP AckDHCP process : DHCP AckComm Server configuration for AVAComm Server configuration for AVAComm Server configuration for AVAComm Server configuration for AVAQOS: TOS/802.1pOS6624 configuration for AVA

ava with external dhcp server

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