Enabling The Trunking Protocols; About Trunking Protocols - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Chapter 16 Configuring Trunking
D r a f t Ve r s i o n 3 - 0 3 D e c 2 0 0 8 - C i s c o C o n f i d e n t i a l

Enabling the Trunking Protocols

This section explains how to enable or disable the required trunking and channeling protocols
represented in
•
•
•

About Trunking Protocols

The trunking protocol is important for trunking operations on the ports. The protocols enable the
following activities:
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•
•
Table 16-1
Table 16-1
Trunk Link
TE-TE port link
TF-TN port link
TF-TNP port link
E or F PortChannel
TF Port Channel
Third-party TF-TNP port link
1. These features are not currently supported.
By default, the trunking protocol is enabled on E ports and disabled on F ports. If the trunking protocol
is disabled on a switch, no port on that switch can apply new trunk configurations. Existing trunk
configurations are not affected. The TE port continues to function in trunk mode, but only supports
traffic in VSANs that it negotiated with previously (when the trunking protocol was enabled). Also, other
switches that are directly connected to this switch are similarly affected on the connected interfaces. In
some cases, you may need to merge traffic from different port VSANs across a non-trunking ISL. If so,
disable the trunking protocol.
We recommend that both ends of a trunking link belong to the same port VSAN. On certain switches or
Note
fabric switches where the port VSANs are different, one end returns an error and the other end is not
connected.
Tip To avoid inconsistent configurations, disable all ports with a shutdown command before enabling or
disabling the trunking protocols.
OL-18084-01, Cisco MDS NX-OS Release 4.x
Figure 16-2 and includes the following topics:
About Trunking Protocols, page 16-7
Enabling the Cisco Trunking and Channeling Protocols, page 16-8
Enabling the F Port Trunking and Channeling Protocol, page 16-8
Dynamic negotiation of operational trunk mode.
Selection of a common set of trunk-allowed VSANs.
Detection of a VSAN mismatch across an ISL.
specifies the protocols used for trunking and channeling.
Supported Trunking Protocols
1
Default
Cisco EPP (PTP)
FC-LS Rev 1.62 EVFP
Cisco EPP (PTP)
Cisco EPP (PCP)
Cisco EPP (PTP and PCP)
1
FC-LS Rev 1.62 EVFP
Cisco MDS 9000 Family CLI Configuration Guide
Enabling the Trunking Protocols
16-7