Interaction with Other Features
Configuring Virtual Chassis
page 9-16
OmniSwitch AOS Release 7 Network Configuration Guide
June 2013
Interaction with Other Features
This section contains important information about how other OmniSwitch features interact with the virtual
chassis feature. Refer to the specific chapter for each feature to get more detailed information about how to
configure and use the feature.
Data Center Bridging
•
Priority-based Flow Control (PFC) - To support (PFC) across the VFL links of Virtual Chassis the
links have to be configured in a certain manner. Only one VFL member port is allowed from each port
group based on the type of module being used to support the VFL member ports. See the table below
for the port group requirements:
OS10K Module Port Groups
•
If a chassis is operating in virtual chassis mode and the Data Center license is activated, then this port
group requirement will be enforced, if there is no Data Center license installed the requirements are not
applicable.
•
If the
vcsetup.cfg
file contains a configuration that does not adhere to this requirement, then upon boot
up only one configured VFL member port from each group of ports listed above will be enabled. The
configuration of the remaining ports of the same port group will be rejected. There is no guarantee as to
which port will be selected to become a VFL member port.
•
During run time configuration, if there is already a port from the port group that is a member of the
VFL then no additional ports from the port group can be added to the same VFL and an error will be
reported.
•
When configuring PFC over VFL on an OmniSwitch 6900, the VFL should not have more than 8 ports
comprising the VFL.
Multicast Load Balancing
IP Multicast traffic load balancing may not be optimized on VFL member ports that belong to the same
port group as listed in the table above. To ensure IP Multicast traffic load balancing is optimized over the
VFL, only one VFL member port should be included per port group.
Module
Port Grouping
OS10K-XNI-U32E
Port Group 1 (Ports 1-16)
Port Group 2 (Ports 17-32)
OS10K-XNI-U16E/U16L
Port Group 1 (Ports 1-16)
OS10K-QNI-U8E
Port Group 1 (Ports 1-4)
Port Group 2 (Ports 5-8)
OS10K-QNI-U4E
Port Group 1 (Ports 1-4)
Note
: The OS6900 platform and the OS10K-XNI-U32S module are not
affected