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Chapter 11
Configuring Interfaces
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 .
TE Port
In trunking E port (TE port) mode, an interface functions as a trunking expansion port. It may be
connected to another TE port to create an Enhanced ISL (EISL) between two switches. TE ports are
specific to Cisco MDS 9000 Family switches. They expand the functionality of E ports to support the
following:
•
•
•
In TE port mode, all frames are transmitted in EISL frame format, which contains VSAN information.
Interconnected switches use the VSAN ID to multiplex traffic from one or more VSANs across the same
physical link. This feature is referred to as trunking in the Cisco MDS 9000 Family (see
"Configuring
SD Port
In SPAN destination port (SD port) mode, an interface functions as a switched port analyzer (SPAN).
The SPAN feature is specific to switches in the Cisco MDS 9000 Family. It monitors network traffic that
passes though a Fibre Channel interface. This monitoring is done using a standard Fibre Channel
analyzer (or a similar switch probe) that is attached to an SD port. SD ports do not receive frames, they
merely transmit a copy of the source traffic. The SPAN feature is nonintrusive and does not affect
switching of network traffic for any SPAN source ports (see
Using
ST Port
In the SPAN tunnel port (ST port) mode, an interface functions as an entry point port in the source switch for
the RSPAN Fibre Channel tunnel. The ST port mode and the remote SPAN (RSPAN) feature are specific to
switches in the Cisco MDS 9000 Family. When configured in ST port mode, the interface cannot be attached
to any device, and thus cannot be used for normal Fibre Channel traffic (see the
page
Fx Port
Interfaces configured as Fx ports can operate in either F port or FL port mode. The Fx port mode is
determined during interface initialization depending on the attached N port or NL port. This
administrative configuration disallows interfaces to operate in any other mode—for example, preventing
an interface to connect to another switch.
B Port
While E ports typically interconnect Fibre Channel switches, some SAN extender devices, such as the
Cisco PA-FC-1G Fibre Channel port adapter, implement a bridge port (B port) model to connect
geographically dispersed fabrics. This model uses B ports as described in the T11 Standard FC-BB-2.
Figure 11-1 on page 11-3
OL-6973-03, Cisco MDS SAN-OS Release 2.x
VSAN trunking
Transport quality of service (QoS) parameters
Fibre Channel trace (fctrace) feature
Trunking"). TE ports support class 2, class 3, and class F service.
SPAN").
43-16).
depicts a typical SAN extension over an IP network.
Fibre Channel Interfaces
Chapter 43, "Monitoring Network Traffic
"Remote SPAN" section on
Cisco MDS 9000 Family Configuration Guide
Chapter 12,
11-5
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