The "User-Name" AVP

The "User-Name" Diameter AVP, which is of type UTF8String, uses the AVP code "1".

It has the MANDATORY flag, the MAY-ENCRYPT flag.

It is part of the AA-Request, AA-Answer, Re-Auth-Request, Re-Auth-Answer, Session-Termination-Request, Session-Termination-Answer, Abort-Session-Request, Abort-Session-Answer, Accounting-Request, Accounting-Answer, Credit-Control-Request, Credit-Control-Answer, QoS-Authorization-Request, NAT-Control-Request, IKEv2-SK-Request, IKEv2-SK-Answer, User-Authorization-Request, Server-Assignment-Request, Server-Assignment-Answer, Multimedia-Auth-Request, Multimedia-Auth-Answer, Registration-Termination-Request, Push-Profile-Request, Example-Request, Diameter-EAP-Request, Diameter-EAP-Answer, MIP6-Request, MIP6-Answer, AA-Mobile-Node-Request, AA-Mobile-Node-Answer, Home-Agent-MIP-Request, Home-Agent-MIP-Answer, Send-Routing-Info-for-SM-Request, Send-Routing-info-for-SM-Answer, MT-Forward-Short-Message-Request, Multimedia-Authentication-Request, Multimedia-Authentication-Answer, Boostrapping-Info-Answer, Push-Profile-Request, Server-Assignment-Request, Server-Assignment-Answer, Registration-Termination-Request, User-Data-Request, Profile-Update-Request, Subscribe-Notifications-Request, Push-Notification-Request, Bootstrapping-Info-Request, Event-Notification-Request, ProSe-Subscriber-Information-Request, Update-ProSe-Subscriber-Data-Request, ProSe-Notify-Request, 3GPP-Provide-Location-Request, 3GPP-Location-Report-Request, 3GPP-Update-Location-Request, 3GPP-Authentication-Information-Request, 3GPP-Cancel-Location-Request, 3GPP-Insert-Subscriber-Data-Request, 3GPP-Delete-Subscriber-Data-Request, 3GPP-Purge-UE-Request, 3GPP-Notify-Request, 3GPP-ME-Identity-Check-Request, 3GPP-Update-VCSG-Location-Request, Cancel-VCSG-Location-Request, 3GPP-LCS-Routing-Info-Request, 3GPP-LCS-Routing-Info-Answer, ProSe-Initial-Location-Information-Request, User-Authorization-Request commands.

It is part of the User-Identifier, NIDD-Authorization-Response, NIDD-Authorization-Update, Group-User-Identifier, Associated-Identities, SCSCF-Restoration-Info, Associated-Registered-Identities, Identity-with-Emergency-Registration grouped AVPs.