RTMNEWQDISCRTMDELLQDISC

RTMNEWQDISCRTMDELLQDISC is not an official single term in Linux or networking literature. It is commonly encountered as a concatenation of two Netlink route message identifiers used by the kernel’s network subsystem to manage queue disciplines (qdisc) in the tc framework. Specifically, it combines RTM_NEWQDISC and RTM_DELLQDISC.

RTM_NEWQDISC represents a request to create a new qdisc on a given network device, while RTM_DELLQDISC represents a request to remove an existing qdisc. Qdisc stands for queue discipline and is a modular mechanism for shaping, scheduling, and policing network traffic. These Netlink messages are part of NETLINK_ROUTE, the kernel interface used by user-space programs such as iproute2 to query and modify networking state.

In practice, the combined string may appear in logs, debugging output, or documentation to indicate that both events occurred or are supported. It is not a formal protocol name; rather it is a descriptive shorthand for a sequence involving creation and deletion of qdiscs. The exact interpretation depends on the software context.

See also: Linux traffic control (tc), queuing discipline (qdisc), Netlink, RTM_NEWQDISC, RTM_DELLQDISC, NETLINK_ROUTE.