In this section:
The following section is only applicable to the DSC Platform.
Certain scenarios can override the configurations of the AB Planes for linksets described on this page. For more information about these scenarios, refer to Traffic Load Sharing in a TTC Network.
Setting the Loadshare Mode attribute in the Web UI may improve load balancing between links in many practical network configurations. For Japanese Networks, the Loadshare Mode value should be set to TTC AB Plane, which affects the Signaling Link Selection (SLS) load sharing algorithm by determining which Message Signal Unit (MSU) is sent to which plane.
The following is true when the TTC AB Plane is enabled:
The TTC AB Plane can only be enabled for TTC SS7 NA variants. An error is returned if any other SS7 variant is enabled.
To respect the TTC AB Plane, a routeset must use a combined linkset, one as A Plane and the other as B Plane, with an equal route cost, and have both linksets as normal or fully normal.
When each linkset has half or more links available (is normal or fully normal), the TTC AB Plane bit divides the MSUs with even SLS values through the A Plane linkset and the MSUs with odd SLS values through the B Plane linkset. However, sometimes there is a trade-off between evenly distributing traffic across available links and respecting the TTC AB Plane bit for linkset selection. These cases are handled as follows:
Execute the instructions in the following procedure for a combined linkset scenario.
Create or select an MTP3 NA
For detailed information about creating and configuring an NA, refer to Configuring an Network Appearance.
After configuring the routeset and linksets, you can determine the state of the linksets based on the availability of the links.
For procedures relating to Single Linkset scenarios or other Combined Linksets scenarios, refer to Traffic Load Sharing in a TTC Network