Lustre 1.6 Operations Manual

31.2.1.4 forwarding ("")
This is a string that can be set either to "enabled" or "disabled" for explicit control of
whether this node should act as a router, forwarding communications between all
local networks.
A standalone router can be started by simply starting LNET (“modprobe ptlrpc”)
with appropriate network topology options.
Variable
acceptor
accept_port
(988)
accept_backlog
(127)
accept_timeout
(5, W)
accept_proto_version
Description
The acceptor is a TCP/IP service that some LNDs use to establish
communications. If a local network requires it and it has not been
disabled, the acceptor listens on a single port for connection
requests that it redirects to the appropriate local network. The
acceptor is part of the LNET module and configured by the
following options:
• secure - Accept connections only from reserved TCP ports (<
1023).
• all - Accept connections from any TCP port. NOTE: this is
required for liblustre clients to allow connections on nonprivileged
ports.
• none - Do not run the acceptor.
Port number on which the acceptor should listen for connection
requests. All nodes in a site configuration that require an acceptor
must use the same port.
Maximum length that the queue of pending connections may grow
to (see listen(2)).
Maximum time in seconds the acceptor is allowed to block while
communicating with a peer.
Version of the acceptor protocol that should be used by outgoing
connection requests. It defaults to the most recent acceptor protocol
version, but it may be set to the previous version to allow the node
to initiate connections with nodes that only understand that
version of the acceptor protocol. The acceptor can, with some
restrictions, handle either version (that is, it can accept connections
from both 'old' and 'new' peers). For the current version of the
acceptor protocol (version 1), the acceptor is compatible with old
peers if it is only required by a single local network.
Chapter 31 Configuration Files and Module Parameters (man5) 31-7