OpenFlow Packet Processing Limitations

Flows can contain only one "output" action. Multiple output actions may be specified in a group table. We support 4,096 groups, which may be configured as either "all" or "indirect" types; group types "select" and "fast failover" are not currently supported. Each group of type "all" may have up to 64 buckets. When multiple output actions are specified in a group bucket that is considered one "set". We can support 50 individual sets and they may all be used in one group or be distributed across multiple groups.

Match Fields—All match fields are supported except the following:

SCTP source port
SCTP destination port
ARP source ipv4 address
ARP target ipv4 address
ARP source hardware address
ARP target hardware address
IPv6 ND target IP address
IPv6 ND source link-layer address
IPv6 ND target link-layer address
IPv6 extension headers
IPv6 flow label

Actions—All actions are supported except for the following set-field operations:

In-port
Phy port
Ethernet frame type
IP protocol
ARP opcode
ARP source ipv4 address
ARP target ipv4 address
ARP source hardware address
ARP target hardware address
SCTP source port
SCTP destination port
ICMPv4 type
ICMPv4 code
IPv6 ND target IP address
IPv6 ND source link-layer address
IPv6 ND target link-layer address
ICMPv6 type
ICMPv6 code

Output ports are fully supported, except as noted.

NORMAL—Unmodified packets are forwarded. The modifications are discarded.

FLOOD
CONTROLLER
IN-PORT
ALL LOCAL

Group table transformations—the following field modifications (in any combination) are supported for packet flows using a group table:

VLAN ID
DMAC *
SMAC *
TOS *
TTL (or Hop Count)
Priority (802.1Q) *

Note

* Can only be changed if the flow is going out one port per a group table. If going out more than one port, the SMAC cannot be changed and the DMAC is filled in with the MAC address of the interface that the VLAN is configured on.

Published May 2016prev | next

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