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9dd165e050
Commit bdebeece5 (lacp: Require successful LACP negotiations when
configured.) makes successful LACP negotiation mandatory for the
bond to come UP. This patch provides a configuration option to
bring up the bond by falling back to active-backup mode on LACP
negotiation failure.
Several of the physical switches that support LACP block all traffic
for ports that are configured to use LACP, until LACP is negotiated
with the host. When configuring a LACP bond on a OVS host
(eg: XenServer), this means that there will be an interruption of the
network connectivity between the time the ports on the physical
switch and the bond on the OVS host are configured. The interruption
may be relatively long, if different people are responsible for
managing the switches and the OVS host.
Such network connectivity failure can be avoided if LACP can be
configured on the OVS host before configuring the physical switch,
and having the OVS host fall back to a bond mode (active-backup) till
the physical switch LACP configuration is complete. An option
"lacp-fallback-ab" is introduced with this patch to provide such
behavior on openvswitch.
Signed-off-by: Ravi Kondamuru <Ravi.Kondamuru@citrix.com>
Signed-off-by: Dominic Curran <Dominic.Curran@citrix.com>
Signed-off-by: Ethan Jackson <ethan@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/*
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* Copyright (c) 2011 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef LACP_H
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#define LACP_H 1
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#include <stdbool.h>
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#include <stdint.h>
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#include "packets.h"
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/* LACP Protocol Implementation. */
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enum lacp_status {
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LACP_NEGOTIATED, /* Successful LACP negotations. */
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LACP_CONFIGURED, /* LACP is enabled but not negotiated. */
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LACP_DISABLED /* LACP is not enabled. */
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};
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struct lacp_settings {
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char *name; /* Name (for debugging). */
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uint8_t id[ETH_ADDR_LEN]; /* System ID. Must be nonzero. */
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uint16_t priority; /* System priority. */
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bool active; /* Active or passive mode? */
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bool fast; /* Fast or slow probe interval. */
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bool fallback_ab_cfg; /* Fallback to BM_SLB on LACP failure. */
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};
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void lacp_init(void);
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struct lacp *lacp_create(void);
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void lacp_unref(struct lacp *);
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struct lacp *lacp_ref(const struct lacp *);
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void lacp_configure(struct lacp *, const struct lacp_settings *);
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bool lacp_is_active(const struct lacp *);
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void lacp_process_packet(struct lacp *, const void *slave,
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const struct ofpbuf *packet);
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enum lacp_status lacp_status(const struct lacp *);
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struct lacp_slave_settings {
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char *name; /* Name (for debugging). */
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uint16_t id; /* Port ID. */
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uint16_t priority; /* Port priority. */
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uint16_t key; /* Aggregation key. */
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};
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void lacp_slave_register(struct lacp *, void *slave_,
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const struct lacp_slave_settings *);
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void lacp_slave_unregister(struct lacp *, const void *slave);
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void lacp_slave_carrier_changed(const struct lacp *, const void *slave);
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bool lacp_slave_may_enable(const struct lacp *, const void *slave);
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bool lacp_slave_is_current(const struct lacp *, const void *slave_);
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/* Callback function for lacp_run() for sending a LACP PDU. */
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typedef void lacp_send_pdu(void *slave, const void *pdu, size_t pdu_size);
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void lacp_run(struct lacp *, lacp_send_pdu *);
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void lacp_wait(struct lacp *);
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#endif /* lacp.h */
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