Citrix SD-WAN Platforms
The accelerated bridges support either 1 Gbps or 10 Gbps data rates. Ethernet and SFP+ interfaces are
supported, depending on model.
One-arm deployment. One-arm deployments are also supported, using WCCP or virtual inline
modes. With such deployments, an SD-WAN 4000/5000 traic port is connected directly to a port on
the WAN router. The other port on the bridged pair is le unconnected.
Performance considerations. Inline deployments provide higher performance than the one-arm de-
ployments, because the use of two ports instead of one doubles the peak throughput of the interfaces.
Peak throughput is important with SD-WAN 4100/5100 appliances, because the compressor provides
acceleration in proportion to the compression ratio. That is, a connection that achieves 100:1 com-
pression transfers data 100 times faster than an uncompressed connection, as long as the rest of the
network path can keep up.
For example, take a datacenter with a 500 Mbps WAN link and a 1 Gbps LAN. The small 2:1 speed ratio
between the WAN and LAN allows compression to provide only a 2x speedup on a whole-link basis,
because there is no way to get data onto or o of the LAN at speeds above 1 Gbps. A 10 Gbps LAN,
which allows a tenfold increase in peak data rates, is recommended for use with SD-WAN 4100/5100
deployments.
When an SD-WAN 4100/5100 appliance is deployed in a one-arm mode, the peak transfer rate is cut in
half. An SD-WAN 4100/5100 in one-arm mode, connected to the router with a 1 Gbps LAN interface, sat-
urates this interface when the WAN is running at full speed in both directions. For good performance,
SD-WAN 4100/5100 must have a LAN interface that is much faster than the WAN. When the appliance
is connected directly to the router in a one-arm mode, use a 10 Gbps router port.
Note
The 10 Gbps ports support 10 Gbps only. They do not negotiate lower speeds. Use the 1 Gbps
ports for 1 Gbps networks.
Other ports
An SD-WAN 4100/5100 appliance has atleast two non-accelerated ports. Port 0/1 is typically used for
management, Port 0/2 is present but typically not used. A Light Out Management (LOM) port is also
provided. An RS-232 port can be used for management.
SD-WAN 4100 WANOP
June 19, 2020
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