Trunking Protocols - Cisco MDS 9000 Series Configuration Manual

Configuring Trunking
• TF-TNP port link—A single link can be established to connect an TF port to an TNP port using the PTP
• A Fibre Channel VSAN is called Virtual Fabric and uses a VF_ID in place of the VSAN ID. By default,

Trunking Protocols

The trunking protocol is important for trunking operations on the ports. The protocols enable the following
activities:
• Dynamic negotiation of operational trunk mode.
• Selection of a common set of trunk-allowed VSANs.
• Detection of a VSAN mismatch across an ISL.
Table 23: Supported Trunking Protocols, on page 201
Table 23: Supported Trunking Protocols
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
7
8
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.
Protocol (EVFP). A server can reach multiple VSANs through a TF port without inter-VSAN routing
(IVR).
protocol to carry tagged frames (see the link 2 in
because PTP also supports trunking PortChannels.
Note
The TF-TNP port link between a third-party NPV core and a Cisco NPV switch
is established using the EVFP protocol.
the VF_ID is 1 for all ports. When an N port supports trunking, a pWWN is defined for each VSAN and
called a logical pWWN. In the case of MDS core switches, the pWWNs for which the N port requests
additional FC_IDs are called virtual pWWNs.
7
8
These features are not currently supported.
These features are not currently supported.
Figure 5: Trunking F Ports, on page
specifies the protocols used for trunking and channeling.
Default
Cisco EPP (PTP)
FC-LS Rev 1.62 EVFP
Cisco EPP (PTP)
Cisco EPP (PCP)
Cisco EPP (PTP and PCP)
FC-LS Rev 1.62 EVFP
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
Trunking Protocols
200). PTP is used
201