Cisco Nexus 5000 Series Switch Fabric Manager Software Configuration Guide, NX-OS 4.0 (OL-16598-01, June 2008)

CHAPTER
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13-1
Nexus 5000 Series Switch Fabric Manager Software Configuration Guide
OL-16598-01
13
Configuring VSAN Trunking
This chapter describes the VSAN trunking feature provided in Nexus 5000 Series switches.
This chapter includes the following sections:
• Information About VSAN Trunking, page 13-1
• Configuring VSAN Trunking, page 13-3
• Default Settings, page 13-7
Information About VSAN Trunking
VSAN trunking enables interconnect ports to transmit and receive frames in more than one VSAN, over
the same physical link, using enhanced ISL (EISL) frame format (see Figure 13-1).
VSAN trunking is supported on native Fibre Channel interfaces, but not on virtual Fibre Channel
interfaces.
Figure 13-1 VSAN Trunking
The VSAN trunking feature includes the following restrictions:
• Trunking configurations are only applicable to E ports. If trunk mode is enabled in an E port and
that port becomes operational as a trunking E port, it is referred to as a TE port.
• The trunk-allowed VSANs configured for TE ports are used by the trunking protocol to determine
the allowed-active VSANs in which frames can be received or transmitted.
• If a trunking-enabled E port is connected to a third-party switch, the trunking protocol ensures
seamless operation as an E port.
Additional information about VSAN trunking is covered in the following topics:
• VSAN Trunking Mismatches, page 13-2
• VSAN Trunking Protocol, page 13-2
Switch 1
Any other
switch
ISL
E port E port
Switch 1 Switch 2
EISL
TE port TE port
Trunking
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