HP Virtual Connect 8Gb 20-port Fibre Channel Module for c-Class BladeSystem - Manual (Page 199)

Virtual Connect server profiles 199
If the 'Force same VLAN mappings as Shared Uplink Sets' option is selected, server VLAN mappings are the
same as the shared uplink set VLAN mappings. You can choose only from a list of shared uplink sets when
selecting Multiple Networks. After selecting a shared uplink set from the pull-down list, a list of VLANs that
belong to the chosen shared uplink set is displayed.
The server VLAN mappings are the same as those used on the shared uplink set, which are automatically
displayed and cannot be changed. One of the networks can also be selected as the 'Untagged' network,
which means that untagged packets are placed on that VLAN, and the VC-Enet module also transmits
untagged packets to the server for that network.
With this 'forced' option selected, the server connection VLAN mappings are linked to the chosen shared
uplink set. Any change to the uplink VLAN mappings is reflected automatically on the server connection using
those shared uplink set VLAN mappings. Therefore, to minimize network outage time, any VLAN mapping
changes to the uplinks requires immediate changes being made to the VLAN tagging on the servers.
No Forced VLAN Mappings
If the 'Force same VLAN mappings as Shared Uplink Sets' option is not selected, you can choose available
networks and assign a unique server VLAN associated with the network for this server port. Not forcing VLAN
mappings provides greater flexibility in selecting the set of networks to connect to each server port, and
enables administrators to specify server VLAN mappings independent of those assigned by the network
administrator for the shared uplink sets. The untagged option is always available, but it might be unassigned,
that is, any untagged frame from the server is dropped. Each network can be selected only once per server
port. Similarly, each server-assigned VLAN must be unique per server port.
This option is not available if the domain-wide 'Force server connections to use the same VLAN mappings as
shared uplink sets' checkbox on the Advanced Settings tab of the Ethernet Settings screen is selected.
If the selected network is part of a shared uplink set, it has an associated external VLAN mapping. This
external VLAN is used to pre-populate the server-assigned VLAN entry to maintain consistency throughout the
VC domain. However, multiple networks on different shared uplink sets can have the same external VLAN
mapping. If those networks are selected for the same server port, you must edit the server VLAN to ensure all
VLANs are unique for each server port.