Ip fast channel1/9/2024 ![]() Its other member ports are in standby mode until a LACP PDU is received by the portĬhannel. Static fallback: the port channel maintains one active port while in fallback mode all Port channel reverts to its configured fallback mode if one is configured. The period the LAG waits to receive a peer PDU. Fallback mode allows an active LACP interface to maintainĪ LAG without receiving PDUs from its peer. Mode does not form a LAG until it receives PDUs from, and negotiates Fallback ModeĪn active interface that is not in fallback Under these parameters, when the switch does not receive a LACP PDU for an interface during a ninety-second period, it records the partner interface as failed and removes the interface from the port channel. After synchronization is complete, interfaces exchange one PDU every thirty seconds, facilitated by a default timeout of 30 seconds and a failure tolerance of three. Links aggregate on the static switch without LACP links do notĪggregate on the other switch, and no port-channel connection isĭuring synchronization, interfaces in dynamic LAGs transmit one LACP PDU per second. Links do not aggregate because LACP negotiation is not Links aggregate when LACP negotiation is successful. Table 1 summarizes the effect of different LACP modeĬombinations: Table 1. With passive or active partner interfaces, but port channels are notįormed when the interface on each switch is passive. Receives and responds to the packet to form a LAG.Īn active interface can form port channels The partner switch must be in active modeĪnd initiates negotiation by sending a LACP packet. Passive interfaces only send LACP PDUs in response.An aggregate forms if the peer runs LACP in (LACP PDUs) at a rate of one per second when forming a channel with an Active interfaces send LACP Protocol Data Units.Packets may drop when static LAG configurationsĭynamic LAGs are aware of their partners’ port-channel states. The member ports do not send LACP packets or process The switch aggregates links without an awareness of LAGs on the partner switch and In static mode (with the channel-group mode configured as on on the member interfaces), Platform in the latest EOS release are available here. The maximum number of ports per LAG varies by platform numbers for each The ports try to complete LACP negotiationĪutomatically with the linked ports (also configured as a dynamic LAG) on the partner LACP-compatible ports into a dynamic LAG. Switches to automatically establish and maintain link aggregation groups (LAGs, alsoĬalled channel groups or port channels). The Link Aggregation Control Protocol (LACP), described by IEEE 802.3ad, defines a method for two
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