Specifications

HP Virtual Connect for Cisco Network Administrators (version 1.2x) page 26
channel-group 2 mode active
spanning-tree portfast
Note:
The PortFast command in this scenario is only required under the Port Channel interfaces and
is not required on the physical interfaces. However, best practice is to include the PortFast
command under the physical interface just in case the port channel is dissolved and the
uplinks resort to simple failover mode.
Sample Configuration 4: VC Uplinks Connected to a Cisco EtherChannel VLAN Trunk
The figure below shows a VC and Cisco EtherChannel plus VLAN Trunking scenario and the minimum
configuration required on the Cisco switch. All four VC uplinks are assigned to a Shared Uplink Set
and are VLAN Trunk ports. The Shared Uplink Set is configured with VLAN IDs 2 thru 4 corresponding
to vNets “vNet_LAN2”, “vNet_LAN3”, and “vNet_LAN4” respectively. All server NICs are untagged
and assigned to single VLANs from the Shared Uplink Set. In addition, the Shared Uplink Set has it’s
connection mode set to “auto”.
Figure 10. VC Uplinks Connected to two Cisco EtherChannels that are also VLAN Trunks
External Cisco Switch Configuration:
interface Port-channel1
description "Port Channel to VC1"
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 2,3,4
switchport mode trunk
spanning-tree portfast trunk
!
interface Port-channel2