Deployment Guide

4.4.3 DNOS-OF L2 Rewrite Group Entries

DNOS-OF L2 Rewrite group entries are of indirect type and have a single action bucket. They are used when it

is desired to modify Ethernet header fields for bridged packets. Use of an DNOS-OF L2 Rewrite group entry is

optional, and can only be a Policy ACL Flow Table action.

DNOS-OF L2 Rewrite actions are optional with the exception of group. This permits an DNOS-OF L2 Rewrite

group entry to selectively modify the source MAC, destination MAC, and/or VLAN ID.

If a Set Field action sets the VLAN id, the VLAN id must be the same as in a chained L2 Interface group

entry. Note that if the VLAN id is not rewritten, the VLAN id in the L2 Interface group entry must be the

same as the VLAN id matched in the Policy ACL Flow Table flow entry that forwarded to the rewrite group.

4.4.3.1 Naming Convention

Table 49 details the DNOS-OF L2 Rewrite group entry identifier subfields that encode the type and VLAN ID.

4.4.3.2 Action Buckets

The single action bucket specifies the output group for forwarding the packet and optional Ethernet header

modifications.

Field

Argument

Description

Group

entry

Must chain to a L2 Interface group entry.

Required.

Set Field

MAC_SRC

Re-write the source MAC. Optional.

Set Field

MAC_DST

Re-write the destination MAC. Optional.

Set Field

VLAN-id

Re-write the VLAN id. Optional.

Chained group entries must be defined before being used. DNOS-OF maintains reference counts for used

entries, and a group entry cannot be deleted if it is referenced by a flow entry or another group.

4.4.3.3 Counters

DNOS-OF L2 Rewrite group entry counters are as shown in Table 51 for completeness.