Configuring Egress Trunk
The Stir/Shaken in the egress trunk defines whether to sign a call or not when passing the calls to Egress trunk.
This option means the switch will ignore Stir/Shaken for this egress trunk.
Require Signature or Block Call
This option means Class 4 will not send call to this egress trunk if it does not has an Identity header.
Require Valid Signature or Block Call
This option means Class 4 will not send call to this egress trunk if it does not has a valid Identity header.
Passthur or Sign Call if no signature
This options means Class 4 will attempt to sign calls according to the attestation defined in the ingress trunk to sign the call.
By default, Class 4 does not do anything to P-header. Class 4 supports 2 different p-asserted identity header setting as shown her: