General Guidelines and Limitations
The trunking feature has the following general configuration guidelines and limitations:
- F ports support trunking in Fx mode.
- The trunk-allowed VSANs configured for TE, TF, and TNP links 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.
- Trunking F ports and trunking F PortChannels are not supported on the following hardware:
- On core switches, the FC-SP authentication will be supported only for the physical FLOGI from the physical pWWN.
- No FC-SP authentication is supported by the NPV switch on the server F ports.
- MDS does not enforce the uniqueness of logical pWWNs across VSANs.
- DPVM is not supported on trunked F port logins.
- The DPVM feature is limited to the control of the port VSAN, since the EVFP protocol does not allow changing the VSAN on which a logical pWWN has done FLOGI.
- The port security configuration will be applied to both the first physical FLOGI and the per VSAN FLOGIs.
- Trunking is not supported on F ports that have FlexAttach enabled.
- On MDS 91x4 core switches, hard zoning can be done only on F ports that are doing either NPIV or trunking. However, in NPV mode, this restriction does not apply since zoning is enforced on the core F port.
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