What are the LACP modes?

LACP has two modes, i.e., Active mode (Ports initiate negotiation with other ports by exchanging LACP packets.) and Passive Mode (Ports reply to the received LACP packets but it doesn’t initiate LACP.).

What are LACP packets?

LACP allows a network device to negotiate an automatic bundling of links by sending LACP packets to their peer, a directly connected device that also implements LACP. Maximum number of bundled ports allowed in the port channel: Valid values are usually from 1 to 8. LACP mode : Active: Enables LACP unconditionally.

What is the difference between LACP and static lag?

LAG without Link Aggregation Control Protocol is a static configuration, in which each pair of ports in a LAG require manual configuration respectively. However, LACP enabled ports are dynamic configuration, which enable to auto-configure into trunk groups when building LAG.

Are LACP packets tagged?

When “vlan dot1q tag native” command is enabled on Cisco 3750E router, the LACP PDUs are getting tagged with native vlan and being sent out of the ether channel ports which is against the LACP IEEE RFC which states that LACP PDUs are always untagged.

What layer is LACP?

Starting in Junos OS Release 15.1X49-D80, Link Aggregation Control Protocol (LACP) is supported in Layer 2 transparent mode in addition to existing support in Layer 3 mode for SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200 devices and vSRX instances.

What are two types of LAGs?

Two types of LAGs are supported:

  • Static—The ports in the LAG are manually configured.
  • Dynamic—A LAG is dynamic if LACP is enabled on it.
  • By MAC Addresses—Based on the destination and source MAC addresses of all packets.

What is static LACP?

Static—The ports in the LAG are manually configured. A LAG is static if LACP is disabled on it. The group of ports assigned to a static LAG are always active members.