Cisco Systems DSC9148D8G48PK9 manual PortChannel Deletion, Interfaces in a PortChannel

Chapter 6 Configuring PortChannels

Information About PortChannels

Table 6-1compares ON and ACTIVE modes.

Table 6-1 Channel Group Configuration Differences

ON Mode	ACTIVE Mode
No protocol is exchanged.	A PortChannel protocol negotiation is performed
	with the peer ports.
Moves interfaces to the suspended state if its	Moves interfaces to the isolated state if its
operational values are incompatible with the	operational values are incompatible with the
PortChannel.	PortChannel.
When you add or modify a PortChannel member	When you add or modify a PortChannel interface,
port configuration, you must explicitly disable	the PortChannel automatically recovers.
(shut) and enable (no shut) the PortChannel
member ports at either end.
Port initialization is not synchronized.	There is synchronized startup of all ports in a
	channel across peer switches.
All misconfigurations are not detected as no	Consistently detect misconfigurations using a
protocol is exchanged.	PortChannel protocol.
Transitions misconfigured ports to the suspended	Transitions misconfigured ports to the isolated
state. You must explicitly disable (shut) and	state to correct the misconfiguration. Once you
enable (no shut) the member ports at either end.	correct the misconfiguration, the protocol ensures
	automatic recovery.
This is the default mode.	You must explicitly configure this mode.

PortChannel Deletion

When you delete the PortChannel, the corresponding channel membership is also deleted. All interfaces in the deleted PortChannel convert to individual physical links. After the PortChannel is removed, regardless of the mode used (ACTIVE and ON), the ports at either end are gracefully brought down, indicating that no frames are lost when the interface is going down (see the “Graceful Shutdown” section on page 2-9).

If you delete the PortChannel for one port, then the individual ports within the deleted PortChannel retain the compatibility parameter settings (speed, mode, port VSAN, allowed VSAN, and port security). You can explicitly change those settings as required.

•If you use the default ON mode to avoid inconsistent states across switches and to maintain consistency across switches, then the ports shut down. You must explicitly enable those ports again.

•If you use the ACTIVE mode, then the PortChannel ports automatically recover from the deletion.

Interfaces in a PortChannel

You can add or remove a physical interface (or a range of interfaces) to an existing PortChannel. The compatible parameters on the configuration are mapped to the PortChannel. Adding an interface to a PortChannel increases the channel size and bandwidth of the PortChannel. Removing an interface from a PortChannel decreases the channel size and bandwidth of the PortChannel.

This section describes interface configuration for a PortChannel and includes the following topics:

•Interface Addition to a PortChannel, page 6-8

	Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x		6-7