• Drops the trafficfor allof the VLANs on thevNIC.
• Raises the following faults:
◦ Link Down
◦ VIF Down
CiscoUCS Manager does not raise a fault or warning about the VLAN configuration.
Forexample, a vNIC on a server is configured with VLANs 101, 102, and 103. Interface 1/3 is assigned only
toVLAN 102. Interfaces 1/1 and 1/2 are not explicitly assigned to a VLAN, which makes them available for
trafficon VLANs 101 and 103. As a result of this configuration, the Cisco UCS domain does not include a
borderport interface that can carry traffic for all three VLANS for which the vNIC is configured. As a result,
CiscoUCS Manager brings down the vNIC, drops trafficfor all three VLANs on the vNIC, and raises the
LinkDown and VIF Down faults.
Hard Pinning
Hardpinning occurs when you useLAN pingroups tospecify the pinning target for the traffic intended for
thedisjoint L2 networks. In turn, the uplink Ethernet port or port channelthat is the pinning target must be
configuredto communicatewith the appropriatedisjoint L2 network.
Withhard pinning, Cisco UCS Manager validates data traffic from a vNIC against the VLAN membership
ofall uplink Ethernet ports and port channels, and validates the LAN pin group configuration to ensure it
includesthe VLAN and the uplink Ethernet port or port channel. If the validation fails at any point, Cisco
UCSManager does thefollowing:
• Raises a Pinning VLAN Mismatch fault with a severity of Warning.
• Drops trafficfor theVLAN.
• Does not bring the link down, so that traffic for other VLANs can continue to flow along it.
Forexample, if you want to configure hard pinning for an upstream disjoint L2 network that uses VLAN177,
dothe following:
• Create a LAN pin group with the uplink Ethernet port or port channel that carries the trafficfor the
disjointL2 network.
• Configure at least one vNIC in the service profile with VLAN 177 and the LAN pin group.
• Assign VLAN 177 to an uplink Ethernet port or port channel included in the LAN pin group
Ifthe configuration fails at any of these three points, then Cisco UCS Manager warns for a VLAN mismatch
forVLAN 177 and drops the trafficfor that VLAN only.
Configuring Cisco UCS for Upstream Disjoint L2 Networks
Whenyou configure a Cisco UCS domain to connect with upstream disjoint L2 networks, you need to ensure
thatyou complete all of the followingsteps.
Before You Begin
Beforeyou begin this configuration, ensure that the ports on the fabric interconnects are properly cabled to
supportyour disjointL2 networks configuration.
Cisco UCS Manager GUI Configuration Guide, Release 2.0
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Configuring Cisco UCS for Upstream Disjoint L2 Networks