HP Virtual Connect 8Gb 24-port Fibre Channel Module for c-Class BladeSystem - Manual (Page 81)

Configuring the Virtual Connect domain using the CLI 81
Because VLAN tags are added or removed when Ethernet packets leave or enter the VC-Enet shared
uplink, the VLAN tags have no relevance after the Ethernet packet enters the enclosure.
IMPORTANT: If you are deploying a server where VLAN tags will be used (added) on the
server itself, do not connect the server Ethernet port carrying VLAN-tagged traffic to a shared
uplink set.
Identifying an associated network as the native VLAN causes all untagged incoming Ethernet packets to
be placed onto this network. Only one associated network can be designated as the native VLAN. All out-
going Ethernet packets are VLAN tagged.
Displaying shared uplink port sets
• Summary display
>show uplinkset
• Detailed display
>show uplinkset *
• Single uplinkset display
>show uplinkset MyUplinkSetName
Adding uplink ports to a shared uplink port set
To add uplink ports to a shared uplink port set, use the add uplinkport command:
>add uplinkport enc0:1:2 uplinkset=MyUplinkSetName
Creating a network that uses a shared uplink port set
To create a network that uses a shared uplink port set, use the add network command:
>add network MyNewNetworkName uplinkset=MyUplinkSetName vlanid=156
Server VLAN Tagging Support
With VC 1.31 and lower, each server port could be connected to a single virtual network. With v1.31
and higher, each server port can be connected to multiple virtual networks, each using a unique server
VLAN ID for virtual network mapping.
This feature can be turned off or turned on by using the following command:
>set enet-vlan VLanTagControl=Tunnel
>set enet-vlan VlanTagControl=Map
If upgrading firmware to VC v1.31 or higher, this feature is disabled by default.
If Virtual Connect is set to map VLAN tags, the translation of Server VLAN tags to internal network VLAN
and again to external data center VLAN tags, and the reverse, on incoming and outgoing frames can
result in a configuration where the server VLANs might not match the external VLANs used on uplinks. To
avoid this scenario, the server connections can be forced to use the same VLAN mappings as the shared
uplink sets.
>set enet-vlan VLanTagControl=Map SharedServerVLanId=true
When using mapped VLAN tags, the overall link speed can be controlled as follows: