High-level data link control. An International Telecommunication Union (ITU) standard for a bit-oriented data link layer protocol on which most other bit-oriented protocols are based.
hold time
Maximum number of seconds allowed to elapse between the time a BGP system receives successive keepalive or update messages from a peer.
host module
On an M160 router, provides routing and system management functions of the router. Consists of the Routing Engine and Miscellaneous Control Subsystem (MCS).
