Page History

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• For Ingress leg Require/Supported header processing: The Require/Supported header in the received message after Ingress SMM processing but before any other SBC processing is taken as base.
• If pass-through <option tag list> is specified for Ingress leg respective to the message under consideration, option tags present in the Require/Supported header but not in the <option tag list> are removed.
• If pass-through "all" is specified for Ingress leg respective to the message under consideration, option tags present in the Require/Supported header are left intact.
• If block <option tag list> is specified for Ingress leg respective to the message under consideration, option tags present in the <option tag list> are removed if they exist in the Require/Supported header.
• If block "all" is specified for Ingress leg respective to the message under consideration, all option tags present in the Require/Supported header are removed.
• For Egress Require/Supported header processing: the Require/Supported header in the message to be egressed by SBC after all SBC processing but before Egress SMM processing is taken as the base.
• If pass-through <option tag list> is specified for Egress leg respective to the message under consideration, option tags present in the Require/Supported header to be egressed but not in the <option tag list> are removed.
• If pass-through "all" is specified for Egress leg respective to the message under consideration, option tags present in the Require/Supported header are left intact.
• If block <option tag list> is specified for Egress leg respective to the message under consideration, option tags present in the <option tag list> are removed if they exist in the Require/Supported header.
• If block "all" is specified for Egress leg respective to the message under consideration, all option tags present in the Require/Supported header are removed.
• If an option tag present in the received Ingress request is dropped due to Require Transparency settings, and if reject request is configured, the request is rejected with a new internal cause code. This internal cause code is mapped to 420 "Bad Extension" by default. Option-tags added to Require header due to SBC processing, for example path, are not cause rejection of the message even if they are eventually dropped by the Require Transparency Functionality.