Guidelines for Configuring VMANs
The following sections provide VMAN configuration guidelines for the supported
platforms:
Guidelines for All Platforms
The
following are VMAN configuration guidelines for all platforms:
- Duplicate customer MAC addresses that ingress from
multiple VMAN access ports on the same VMAN can disrupt the port learning
association process in the switch.
- VMAN names must conform to the guidelines described in
Object Names.
- You must use mutually exclusive names for:
- VMAN ports can belong to load-sharing groups.
Guidelines for BlackDiamond X8 and
8000 Series Modules and Summit Family Switches
The following are VMAN configuration guidelines for BlackDiamond X8 and
8000 series modules, SummitStack, and Summit family switches:
- You can enable or disable jumbo frames before
configuring VMANs. You can enable or disable jumbo frames on individual
ports. See Configuring Ports on a Switch for more information on configuring jumbo frames.
- Spanning Tree Protocol (STP) operation on CVLAN
components in a PEB as described in IEEE 802.1ad is not supported.
- The initial version of this feature does not implement
an XML API.
- Multiple VMAN roles can be combined on one port with
certain VLAN types as shown in the following table.
Port Support for Combined VMAN Roles and VLANs
| Platform |
Combined CNP, CEP, and Tagged
VLAN
,
|
Combined PNP, CNP, and CEPa, b,
|
Combined PNP and Tagged
VLAN |
Combined PNP and Untagged
VLAN |
|
Summit X440, X460, X460-G2, X480, X670,
X670-G2, and X770, and E4G-200 and E4G-400
|
X |
X |
X
|
X |
|
BlackDiamond 8800 a-, c-, and
e-series modules
|
X |
X |
X |
X |
|
BlackDiamond X8, 8900 c-, xl-, and xm-series
modules
|
X |
X |
X |
X |
Note
If you already configured VLANs and VMANs
on the same module or stand-alone switch using ExtremeXOS 11.4, you cannot change
the VMAN ethertype from 0X8100 without first removing either the VLAN or VMAN
configuration.
1 Subsets of this group are also
supported. That is, any two of these items are supported.
2 When a CNP is combined with a CEP or tagged
VLAN, any CVIDs not explicitly configured for a CEP or tagged
VLAN are associated with the CNP.
3 A PNP (tagged VMAN) and a CNP (untagged
VMAN) or CEP cannot be combined on a port for which the selected
VMAN ethertype is 0x8100.
4 If the secondary VMAN ethertype is selected
for the port, it must be set to 0x8100.
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