CCNA 2.9.c: Link Aggregation Protocol (LACP)

Overview: Link Aggregation Control Protocol (LACP) is another option when configuring EtherChannels   Study Notes: LACP is an open protocol adhering to the 802.3ad standard It uses the multicast address of 01-80-c2-00-00-02 Channel mode must be set to “active” or “passive” to specify an LACP port-channel Active – Enable LACP unconditionally Passive – Enable LACP […]

CCNA 2.9.b: Port Aggregation Protocol (PaGP)

Overview: Port Aggregation Protocol (PAgP) is another option when configuring EtherChannels Study Notes: PAgP is a Cisco proprietary protocol It uses the multicast address of 01-00-0C-CC-CC-CC Channel mode must be set to “auto” or “desirable” to specify a PAgP port-channel Auto – Enable PAgP only if a PAgP device is detected Desirable – Enable PAgP […]

CCNA 2.9.a: Static PortChannel

Overview: Static port-channels are an option when configuring EtherChannels   Study Notes: No protocol is applied (not LACP or PAgP) Channel mode must be “On” to specify a static port-channel Maximum number of links in port-channel is 8 It is recommended to configure number of links as 1, 2, 4 or 8 Statically configured port-channels […]

CCNA 2.9: Configure, verify, and troubleshoot (Layer 2/Layer 3) EtherChannel

Overview: EtherChannel is a way of combining multiple ports into a single one.  Layer 2 EtherChannel combines multiple physical switchports whereas Layer 3 EtherChannel combines multiple logical interfaces such as subinterfaces.   Study Notes: There are 3 options when configuring Port-Channels: 2.9.a Static PortChannel 2.9.b Port Aggregation Protocol (PaGP) 2.9.c Link Aggregation Protocol (LACP) The […]

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