Selecting IP interface assignments

Last Updated : May 07, 2017 |
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Avaya Aura® MSsupports SDP containing IPv4 and IPv6 network address types using the ANAT (Alternate Network Address Types) protocol as described in RFC 4091.
The IP network address assignment functions as follows:
When Transport is set to IPv4 Only:
  • The SDP offer generated by Avaya Aura® MS does not contain IPv6.
  • The SDP answer from Avaya Aura® MS is always IPv4.
    • If the incoming SDP is IPv4 only, the SDP answer is IPv4 only.
    • If the incoming SDP is ANAT IPv4/IPv6, the SDP answer is ANAT with IPv4 selected.
  • Preferences for remote and local offers are not used when IPv4 only is selected as the transport.
When Transport is set to Dual IPv4/IPv6:
  • Avaya Aura® MS generates an SDP offer containing both IPv4 and IPv6 using ANAT. The ordering of IPv4/IPv6 is determined by using the Preferences for Local Offers as follows:
    • If Preferences for Local Offers is set to IPv4 Preferred, then the SDP contains ANAT with both IPv4/IPv6 and with IPv4 preferred in the ANAT group.
    • If Preferences for Local Offers is set to IPv6 Preferred, then the SDP contains ANAT with both IPv4/IPv6 and with IPv6 preferred in the ANAT group.
  • Avaya Aura® MS generates SDP answer using the Preferences for Remote Offers as follows:
    • If Preferences for Remote Offers is set to the default of Use Remote Preference, then the selection of IPv4 or IPv6 is based on the received SDP preference:
      • For incoming IPv4 only SDP, IPv4 only SDP is used.
      • For incoming IPv6 only SDP, IPv6 only SDP is used.
      • For incoming ANAT SDP with IPv4 preferred over IPv6, IPv4 is used in the ANAT response.
      • For incoming ANAT SDP with IPv6 preferred over IPv4, IPv6 is used in the ANAT response.
    • If Preferences for Remote Offers is set to IPv4 Preferred, the system overwrites the remote preference and sets IPv4 is in the offer.
      • For incoming IPv4 only SDP, IPv4 only SDP is used.
      • For incoming IPv6 only SDP, IPv6 only SDP is used, since this was the only transport offered.
      • For incoming ANAT SDP with IPv4 preferred over IPv6, IPv4 is used in the ANAT response.
      • For incoming ANAT SDP with IPv6 preferred over IPv4, IPv4 is used in the ANAT response.
    • If Preferences for Remote Offers is set to IPv6 Preferred, the system overwrites the remote preference and sets IPv6 is in the offer.
      • For incoming IPv4 only SDP, IPv4 only SDP is used.
      • For incoming IPv6 only SDP, IPv6 only SDP is used.
      • For incoming ANAT SDP with IPv4 preferred over IPv6, IPv6 is used in the ANAT response.
      • For incoming ANAT SDP with IPv6 preferred over IPv4, IPv6 is used in the ANAT response.
Perform the following procedure to configure the IP interfaces for Avaya Aura® MS:
Before you begin
IPv4 is enabled by default. If your system requires IPv6, you must ensure it is enabled before proceeding with Avaya Aura® MS interface assignments. If IPv6 is not enabled, then EM only displays IPv4 options. For information about enabling IPv6 for Linux®, see the OS documentation.
  1. Navigate to EMSystem ConfigurationNetwork SettingsIP Interface Assignments.
  2. Under IPv4 Interfaces, select the desired IPv4 address for each interface: Signaling, Media, Cluster and OAM.
  3. Under IPv6 Interfaces, select IPv6 address for Signaling and Media Cluster interfaces, if desired.
  4. If 1+1 High Availability configuration is desired:
    1. IPv4 Signaling and Media Cluster addresses must match.
    2. If IPv6 is configured:
      ADDITIONAL INFORMATION:
      • IPv6 Signaling and Media Cluster addresses must match.
      • IPv4 and IPv6 addresses must be on the same network interface.
  5. If IPv6 is enabled for your system, then configure the following:
    1. In the IP Configuration section, select the Transport mode as either Dual IPv4/IPv6 or IPv4 Only.
    2. In the IP Configuration section, select Preferences for Remote Offers.
    3. In the IP Configuration section, select Preferences for Local Offers.
  6. Click Save.