Considerations and Limitations for Group Tables

Group Table Configuration Considerations

• RUCKUS ICX devices support all group types in the OpenFlow v1.3.0 specification.
• Multiple actions are supported by a group. The following packet modifications are supported through these actions for group types Indirect, Select and Fast failover:
  • Modify a VLAN
  • Modify the source MAC address
  • Modify the destination MAC address
  • Decrement the TTL
  • Pop VLAN
• Each action bucket can have only one output port.
• Each OpenFlow port can be a part of any number of groups.
• A group entry can include ports from different slots and ports with different speeds.
• Group tables are not impacted based on the OpenFlow type on the interface (Layer 2 or Layer 3 or Layer23 and hybrid interfaces).
• To disable OpenFlow on interfaces, the interface must be removed from any group entry first.

Group Tables Limitations

For configuring OpenFlow, consider the following limitations.

• Watch_group is not supported in the Fast failover group type.
• Policy-based routing (PBR) or Transparent VLAN flooding cannot be configured along with the group table when OpenFlow v1.3.0 is enabled and vice versa.

Group All Limitations

• To multicast flow-matching traffic to all action buckets, all action buckets are executed every time for the group All.
• A packet is replicated for the output port in each bucket. Only one packet is processed for each bucket of the group.

Group Indirect Limitations

• The group Indirect executes one defined action bucket in a group. Only one action bucket can exist and it is executed every time.
• Group Indirect supports one and only one bucket in each group entry.

Group Select Limitations

• To load balance flow-matching traffic to all action buckets, one of the action buckets is chosen each time for the group Select.
• Weighted load balancing for group Select is not supported.
• Group chaining is not supported.
• Individual bucket statistics are not supported.

Group Fast Failover Limitations

• The group Fast failover executes the first live bucket. Each action bucket associated with a specific port or group determines the "liveness" of the bucket.
• The buckets are selected in the defined sequence.
• On a stack unit fast failover, traffic convergence takes up to 3 seconds.
• If no buckets are live, packets are dropped.