Users Guide

Table Of Contents

1696 OpenFlow

Modify Field The switch supports modifying certain fields in the packet. The

feature can be used to give higher priority to certain packets by

modifying the 802.1p and DSCP fields. The feature can also be

used to implement policy based routing.

The packet modifications can be made to the single-port and

multi-port flows. If multiple egress ports are specified in the flow

then all of the packet modification actions must precede the port

forwarding actions. All ports in a multi-port flow perform the

same packet modifications. Dell EMC Networking OpenFlow

Hybrid does not support modifying packets differently for

different ports. This action is only supported for table 4 and 24.

The field modification is supported for the following fields:

• Set VLAN ID

• Set VLAN Priority

• Modify Source MAC Address

• Modify Destination MAC Address

• Modify IPv4 ToS bits

If the flow has a modify VLAN action and does not specify a

tagged matched criterion, the flow is rejected.

The packet actions may appear in any order, but must precede any

forwarding actions. Also, each type of packet modification action

must appear only one time in the flow.

The remaining OpenFlow 1.0 packet modification actions are not

supported. The unsupported actions are:

• Strip VLAN Header.

• Modify IPv4 Source Address

• Modify IPv4 Destination address.

• Modify Transport Source Port.

• Modify Transport Destination Port.

Table 48-4. Supported/Unsupported OpenFlow Forwarding Actions (Continued)

Forwarding Action Description