configuring broadcast traffic to heart commuication RH cluster Post: 302690711

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ibv_detach_mcast

IBV_ATTACH_MCAST(3)					  Libibverbs Programmer's Manual				       IBV_ATTACH_MCAST(3)

NAME

       ibv_attach_mcast, ibv_detach_mcast - attach and detach a queue pair (QPs) to/from a multicast group

SYNOPSIS

       #include <infiniband/verbs.h>

       int ibv_attach_mcast(struct ibv_qp *qp, const union ibv_gid *gid,
			    uint16_t lid);

       int ibv_detach_mcast(struct ibv_qp *qp, const union ibv_gid *gid,
			    uint16_t lid);

DESCRIPTION

       ibv_attach_mcast() attaches the QP qp to the multicast group having MGID gid and MLID lid.

       ibv_detach_mcast() detaches the QP qp to the multicast group having MGID gid and MLID lid.

RETURN VALUE

       ibv_attach_mcast() and ibv_detach_mcast() returns 0 on success, or the value of errno on failure (which indicates the failure reason).

NOTES

       Only QPs of Transport Service Type IBV_QPT_UD may be attached to multicast groups.

       If a QP is attached to the same multicast group multiple times, the QP will still receive a single copy of a multicast message.

       In  order  to receive multicast messages, a join request for the multicast group must be sent to the subnet administrator (SA), so that the
       fabric's multicast routing is configured to deliver messages to the local port.

SEE ALSO

       ibv_create_qp(3)

AUTHORS

       Dotan Barak <dotanba@gmail.com>

libibverbs							    2006-10-31						       IBV_ATTACH_MCAST(3)