Specifications

ip set port forwarding-mode
282 SSR Command Line Interface Reference Manual
ip set port forwarding-mode
Purpose
Causes the SSR, when processing an IP packet, to extract only certain fields from a layer-4
flow, rather than the entire flow.
Format
ip set port <port-list> forwarding-mode <destination-based|host-flow-based>
Mode
Configure
Description
The SSR’s flow identifying logic normally extracts the complete application (layer-4) flow
from an IP packet. The ip set port forwarding-mode command causes the SSR to extract
only certain flow-related fields from the packet’s L3 header, rather than the full layer-4
flow. This allows ports to route packets based on destination address alone, or on
destination and source address only. As a result, in environments that do not have any
filtering or RSVP requirements, the flow table can be used much more efficiently.
Parameters
port <port-list>
Modifies the flow extraction behavior on the specified ports. All ports must have an
IP interface configured for them.
destination-based
If the packet is a unicast packet, causes the destination IP address, TOS and L4 protocol
fields to be the only fields extracted from the IP packet. These fields and the port of
entry field are set into the flow block being constructed. All of the other fields are set
to zero.
For L3 multicast packets, the destination IP address, source IP address, TOS and L4 protocol
fields are the only fields extracted from the IP packet. These along with the port of entry
are the only fields set in the flow block. The remaining fields are set to zero. The flow
lookup then proceeds as normal.
host-flow-based