Configuring Access Guardian Bring Your Own Devices (BYOD) Overview
OmniSwitch AOS Release 8 Network Configuration Guide December 2017 page 28-129
SSDP frames received from the WLAN controller are encapsulated as follows:
Configuration Guidelines
Consider the following guidelines when configuring SSDP Relay functionality for the switch:
• Configure the GRE tunnel interface before attempting to associate the interface with the SSDP tunnel
relay. An IP address is required to bring the interface up; if necessary, specify a dummy IP address
when configuring the interface.
• The GRE tunnel must also be configured on the WLAN controller. Refer to the OmniAccess WLAN
user guide for additional information on configuring a WLAN controller.
• The SSDP and mDNS relay features both require an association with a GRE tunnel IP interface. If both
of these features are required on the switch, configure both to use the same tunnel interface. There is
only one Layer 2 GRE tunnel established between the switch and the WLAN controller, so both
features need to use the same GRE tunnel.
• Only a Layer 2 IPv4 GRE tunnel is supported. However, IPv6 SSDP frames from the client are also
relayed through the IPv4 GRE tunnel, as the payload includes the Layer 2 headers (only Layer 2 GRE
mode is supported by the WLAN controller) regardless of the inner IPv6 header.
Application Example 1: Wired DLNA-Capable Client
In this application example, an active wired DLNA-capable client is attempting to print to a DLNA printer
and stream to a DLNA TV. All the devices are connected to the OmniSwitch 6860, but the SSDP
discovery phase has to flow through the WLAN controller. As a result, the Layer 2 GRE tunnel is required
to handle the initial contact between the devices. Once communication is established, subsequent traffic
flows directly between the devices without going through the controller.
• The WLAN controller handles the SSDP discovery process between the wired client and end service
devices. Encapsulated SSDP packets are sent between the controller and the OmniSwitch 6860 through
the Layer 2 GRE tunnel until discovery is complete.
DA-MAC
OmniSwitch MAC
SA - MAC
WLAN controller
MAC/intermediate
router MAC
IP Header
Src IP: WLAN controller IP
Dst IP: OmniSwitch IP
IP protocol: GRE
GRE VER 00 00
GRE TYPE 00 00 (indicating L2
frame in the payload)
Payload
SSDP frame destined to
the wired service/ client
(appended with 802.1Q
tag)
OmniSwitch 6860 SSDP Relay
DLNA-Capable TV
DLNA-Capable Printer
VLAN X
VLAN Y
DLNA/SSDP L2GRE Tunnel - VLAN X/Y
WLAN Controller
Wired Client Device
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