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*Updated* How to implement the IPv4 & IPv6 dual stack mode on CME 8.0 ?



This document covers how to implement the IPv4 & IPv6 dual stack mode on CME 8.0. This will help you if you have multiple partners connected across ipv6 & ipv4 network and you can Make, Receive calls to your network using any of the IP. This covers the configuration part on the CME to enable dual stack mode.

Configuring Ipv4 & Ipv6 on CME 8.0

CME Image on 2811 Router


hostname 2811-ROUTER



boot system flash c2800nm-ipvoicek9-mz.150-1.XA1.bin


Configure the ipv6 & ipv4 dhcp pool for the IP Phones:

Configure both the ipv6 & ivp6 on the Interface configuration

interface FastEthernet0/1

description #### Internal Interface ####

ip address

duplex full

speed 100

ipv6 address 3001:E50:0:15::1/64

ipv6 enable

ipv6 dhcp server Call-manager

Telephony-service configuration for CME

# voice service voip


bind control source-interface FastEthernet0/1

sccp ccm group 1

associate ccm 1 priority 1

protocol mode dual-stack preference ipv6

max-ephones 42

max-dn 144

ip source-address port 2000

ip source-address 3001:E50:0:15::1

service phone settingsAccess 1

system message CCME 8.0

cnf-file location flash:

cnf-file perphone

load 7911 SCCP11.8-3-3SR2S

load 7970 SCCP70.9-0-2SR1S

max-conferences 16 gain -6




transfer-system full-consult secondary-dialtone 9

create cnf-files version-stamp Jan 01 2010 00:00:00

Note:- CME with dual-stack Mode and IPV6 preference. This "dual-stack mode" will enable CME to work on both ipv6&ipv4 and you can set any IP version as preference.

Note:- Both ipv4 & ipv6 source address configured for communication

Configure ephone & ephone-dn

ephone-dn 1

number 1003

name testlab-1

ephone 1

nte-end-digit-delay 100


mac-address 0014.789C.3C0E

type 7970

button 1:1

Dial-Peer Configuration on CME for Ipv4 & Ipv6 Session Target

Create the Dial-peers using ipv4 / ipv6 depending upon the type of external network IP, as your CME will work on both ipv4 & ipv6

dial-peer voice 18 voip

description carrier1 ipv4

destination-pattern 2345...

session target ipv4:

incoming called-number .T


dial-peer voice 19 voip

description carrier2 ipv6

destination-pattern 298755...

session protocol sipv2

session target ipv6:[5001:630:12:101::50]

incoming called-number .T

voice-class codec 1

no vad

Ephone Registration output to show, Ephone has been registered using both ipv6 & ivp4 address.

#show ephone registered

Ephone-1[0] Mac: 0014.789C.3C0E TCP socket:[2] activeLine:0 whisperLine:0 REGISTERED in SCCP ver 19/17 max_streams=5

mediaActive:0 whisper_mediaActive:0 startMedia:0 offhook:0 ringing:0 reset:0 reset_sent:0 paging 0 debug:0 caps:8

IPv6: 3001:E50:0:15::293D:E02D:55D9:E65F* 49152 IP: 7970 keepalive 23286 max_line 8 available_line 8

button 1: cw:1 ccw:(0)

dn 1 number 1002 CH1 IDLE

Preferred Codec: g711ulaw

Lpcor Type: none

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