Guidelines for Configuring VMANs
The following sections provide VMAN configuration guidelines for the supported platforms:
•
Guidelines for All Platforms•
Guidelines for BlackDiamond X8 and 8000 Series Modules and Summit Family Switches Guidelines for All PlatformsThe 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:• VLANs
• VMANs
• IPv6 tunnels
•
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.Table 3: Port Support for Combined VMAN Roles and VLANs
Platform Combined
Summit X440, X460, X480, X60, and X770, and E4G-200 and E4G-400
X X X4 X
BlackDiamond 8500 and 8800 a-, c-, and e-series modules
X X Xd X
BlackDiamond X8, 8900 c-, xl-, and
xm-series modules X X Xe 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.
Procedure for Configuring VMANs
This section describes the procedure for configuring VMANs. Before configuring VMANs, review Guidelines for Configuring VMANs on page 67. To configure a VMAN, complete the following procedure at each switch that needs to support the VMAN:
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.
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.
1 If you are configuring a BlackDiamond 8800 series switch, a SummitStack, or a Summit family switch, enable jumbo frames on the switch.
Note
Because the BlackDiamond 8800 series switches, SummitStack, and the Summit family of switches enable jumbo frames switch-wide, you must enable jumbo frames before configuring VMANs on these systems.
2 Create a VMAN using the command:
create vman vman_name vr vr_name
3 Assign a tag value to the VMAN using the command:.
configure vman vman_name tag tag_id
4 To configure PNP ports on a PEB or PB, use the following command with the tagged option:
configure vman vman_name add ports [ all | port_list ] {untagged { port-cvid port_cvid} | tagged}
5 To configure CNP ports on a PEB, use the following command with the untagged option:
configure vman vman_name add ports [ all | port_list ] {untagged { port-cvid port_cvid} | tagged}
Note
You must configure CNP ports as untagged, so that the S-tag is stripped from the frame on egress. If the port-cvid is configured, any untagged packet received on the port will be double tagged with the configured port CVID and the SVID associated with the VMAN.
Packets received with a single CVID on the same port will still have the SVID added as usual. As double tagged packets are received from tagged VMAN ports and forwarded to untagged VMAN ports,the SVID associated with the VMAN is stripped. Additionally, the CVID associated with the configured port CVID is also stripped in the same operation.
6 To configure CEP ports on a PEB, do the following:
a Use the following command to establish a physical port as a CEP and configure CVID mapping and translation:
configure vman vman_name add ports port_list cep cvid cvid_range {translate cvid | cvid_range}}
b Use the following commands to add or delete CVIDs for a CEP and manage CVID mapping and translation:
configure vman vman_name ports port_list add cvid {cvid | cvid_range}
{translate cvid | cvid_range }
configure vman vman_name ports port_list delete cvid {cvid | cvid_range } c Use the following commands to manage CVID egress filtering for a CEP:
enable vman cep egress filtering ports {port_list | all}
disable vman cep egress filtering ports {port_list | all}
7 Configure additional VMAN options as described in Configuring VMAN Options on page 70.
8 To configure a VLAN to use a VMAN, configure the VLAN on the switch port at the other end of the line leading to the VMAN access port.