About Portchannel Modes - HP Cisco MDS 9216 - Fabric Switch Configuration Manual

Chapter 23 Configuring PortChannels
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
The following attributes are shown in
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Step 11 Click OK.
The PortChannel is created. Note that it may take a few minutes before the new PortChannel is visible
in the Fabric pane.

About PortChannel Modes

You can configure each PortChannel with a channel group mode parameter to determine the PortChannel
protocol behavior for all member ports in this channel group. The possible values for a channel group
mode are as follows.
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Table 23-1
Table 23-1
ON Mode
No protocol is exchanged.
Moves interfaces to the suspended state if its
operational values are incompatible with the
PortChannel.
OL-16184-01, Cisco MDS SAN-OS Release 3.x
VSAN List—This gives a list of VSANs to which the ISLs belong.
Trunk Mode—You can enable trunking on the links in the PortChannel. Select trunking if your link
is between TE ports. Select nontrunking if your link is between E ports. Select auto if you are not
sure.
Force Admin, Trunk, Speed, and VSAN attributes to be identical—This check box ensures that the
same parameter settings are used in all physical ports in the channel. If these settings are not
identical, the ports cannot become part of the PortChannel.
Speed—The port speed values are auto, 1Gb, 2Gb, 4Gb, and autoMax2G.
ON (default)—The member ports only operate as part of a PortChannel or remain inactive. In this
mode, the PortChannel protocol is not initiated. However, if a PortChannel protocol frame is
received from a peer port, the software indicates its nonnegotiable status. This mode is backward
compatible with the existing implementation of PortChannels in releases prior to Release 2.0(1b),
where the channel group mode is implicitly assumed to be ON. In Cisco MDS SAN-OS Releases
1.3 and earlier, the only available PortChannel mode was the ON mode. PortChannels configured in
the ON mode require you to explicitly enable and disable the PortChannel member ports at either
end if you add or remove ports from the PortChannel configuration. You must physically verify that
the local and remote ports are connected to each other.
ACTIVE—The member ports initiate PortChannel protocol negotiation with the peer port(s)
regardless of the channel group mode of the peer port. If the peer port, while configured in a channel
group, does not support the PortChannel protocol, or responds with a nonnegotiable status, it will
default to the ON mode behavior. The ACTIVE PortChannel mode allows automatic recovery
without explicitly enabling and disabling the PortChannel member ports at either end.
compares ON and ACTIVE modes.
Channel Group Configuration Differences
Figure 23-12:
ACTIVE Mode
A PortChannel protocol negotiation is performed
with the peer ports.
Moves interfaces to the isolated state if its
operational values are incompatible with the
PortChannel.
Cisco MDS 9000 Family CLI Configuration Guide
PortChannel Configuration
23-11