3.8.3.2.1. Configuring Trunking Gateways in OpenScape 4000 
An IPv6 trunking gateway is added to OpenScape 4000 SoftGate like
an IPv4 trunking gateway via AMOs, except for configuring the IP mode.
With each IPv6 trunking gateway in a OpenScape 4000 SoftGate, "Dual
Stack" mode or "IPv6 only" mode can be selected, but only if the functionality
of the board is pure trunking (HG3550). This selection is done with AMO
CGWB.
CHANGE-CGWB:MTYPE=CGW,LTU=<ltu>,SLOT=<slot>,TYPE=IPCONF,IPMODE=DUALSTCK;
orCHANGE-CGWB:MTYPE=CGW,LTU=<ltu>,SLOT=<slot>,TYPE=IPCONF,IPMODE=IPV6;
The IPMODE default is IPV4.
"Dual Stack" mode has to be used when both IPv4 and IPv6 have to be
supported on a SIP trunking route configured for IPv6. In this case,
IPv6 is preferred. All IPv6 dual-stack partners have to be released explicitly.
The released IPv6 partners are listed in the Release Note. Interworking
with Full-ICE devices is not supported.
"IPv6 only" mode has to be used with pure IPv6 partners.
Remarks
- In order to avoid the IPv6 route being bypassed by IPv4 direct media connections, please ensure that DMCEND is configured for the IPv6 trunking gateway.
CHA-LDAT:LROUTE=<lroute>,LATTR=DMCEND;
- IPv6 is used for signaling and payload.
- All IPv6 addresses are configured/managed centrally in the Next Generation Server (NGS) of the OpenScape 4000 central switch.
- Switch Dual Stack/IPv6 board to IPv4:
-
In order to change a board from Dual Stack/IPv6 to IPv4, AMO CGWB has to be used:CHANGE-CGWB:MTYPE=CGW,LTU=<ltu>,SLOT=<slot>,TYPE=IPCONF,IPMODE=IPv4;When an IPv6 or Dual Stack board is changed back to IPv4, all the IPv6 settings related to this board will be disabled automatically (IPv6 address, trunk profile configuration) or deleted (NGS entry). This means that if a further change is made back to IPv6 or Dual Stack, the IPv6 address has to be configured again in the NGS (see also Section 12.3.2.2, “Configuring the IPv6 Address for OpenScape 4000 SoftGate Trunking Gateway (Next Generation Server)”).