What does it mean when a port is suspended?

What does it mean when a port is suspended?

When a port in the etherchannel is in a suspended state means the port configuration is not compatible with others in the same etherchannel.

What is LACP port suspension?

LACP sets a port to the suspended state if it does not receive an LACP bridge protocol data unit (BPDU) from the peer ports in a port channel. This can cause some servers to fail to boot up as they require LACP to logically bring up the port. This command does not require a license.

What is port channeling?

A port channel is a communication link between two switches supported by matching channel group interfaces on each switch. Port channels combine the bandwidth of multiple Ethernet ports into a single logical link. A channel group is a collection of Ethernet interfaces on a single switch.

What is no LACP suspend individual?

suspend-individual Configure lacp port-channel state. Disabling this will cause lacp to put the port to individual state and not suspend the port in case it does not get LACP BPDU. from the peer ports in the port-channel. ! So on Nexus 7000, suspend-individual means suspend if no LACP PDU is heard.

How can I see my port channel?

Use the command, show port-channel summary, to verify the number of port-channels already configured. You can have a maximum of 256 port channels on the Cisco Nexus 1000V. Use this procedure to force the physical interface to take on the characteristics of the port channel.

What does no LACP suspend?

If we apply “no lacp suspend-individual”, all the interfaces in this port channel should be in “individual” mode and up (if the host physical ports are up) on the switch side. If the PXE server only uses the first physical port, the switch will only see MAC address coming from the first port.

What is virtual port channel in Nexus?

Cisco virtual Port Channel (vPC) is a virtualization technology, launched in 2009, which allows links that are physically connected to two different Cisco Nexus Series devices to appear as a single port channel to a third endpoint.

How do I suspend a port on a Nexus switch?

On the Nexus switches there is a command lacp suspend-individual (see lacp suspend-individual) within the port-channel interface context that controls what should happen to an “I” port. On the Nexus 7000 switches this is enabled by default and so an I port will become suspended.

Is traffic still being sent and received on the Nexus switch?

While suspended on the Nexus switch we can also see that the neighbour device (a Catalyst switch) shows the port as “up, line protocol is up”: And we can see that traffic is still being sent and received on the port.

Why is spanning tree not running on the Nexus 7000 switch?

On the Nexus 7000 switches this is enabled by default and so an I port will become suspended. If this configuration is changed such that we have no lacp suspend-individual configured, then the interface does not get suspended, and spanning tree does run on the port.

What is the VPC configuration on the Cisco Nexus 5000 series switch?

The vPC on the Cisco Nexus 5000 Series switch remains up and running. The global configuration, such as Spanning Tree Protocol (STP), and the interface-level configurations are included in the consistency check. The show vpc consistency-parameters global command lists all global consistency check parameters.