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HP Virtual Connect for c-Class BladeSystem Version 3.30 User Guide

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Virtual Connect networks 71
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 outgoing
Ethernet packets are VLAN-tagged.
To enable native VLAN when defining a shared uplink set, select the box under Native. To enable or disable
native VLAN on an existing network, go to the Edit Shared Uplink Set screen (on page 98). Click on the Edit
icon, and then select or deselect the box under Native.
Smart Link
Enabling Smart Link configures the network so that if all external links lose their link to external switches,
Virtual Connect drops the Ethernet link on all local server blade Ethernet ports connected to that network. This
feature can be useful when using certain server network teaming (bonding) configurations.
Private Networks
The Private Networks option provides extra networking security. When checked, the network is configured so
that all server ports connected to it cannot communicate with each other within the Virtual Connect domain.
All packets from servers are sent through the VC domain and out the uplink ports only. Servers on the network
can only communicate with each other through an external Layer 3 router that redirects the traffic back to the
VC domain.
VLAN Tunneling Support
As of VC 3.30, you can have both mapped and tunneled networks within the same domain. VLAN tunneling
support is now controlled on a per network basis. You can enable or disable VLAN tunneling when adding
or modifying a network with a dedicated uplink. Networks that are associated with a shared uplink set
cannot be tunneled (since they are already being mapped).
When the 'Enable VLAN Tunneling' checkbox is selected, packets on that network with VLAN tags are
passed through the VC domain without modification. When the 'Enable VLAN Tunneling' checkbox is not
selected, the uplink ports in the network do not pass any packets that have VLAN tags.