Soft Gre; Figure 9 Soft Gre-Based Architecture - Nokia 7368 Product Manual

7368 ISAM ONT G-240W-G Product Guide
GRE works by encapsulating a payload (an inner packet that needs to be delivered
to a destination network) inside an outer IP packet. GRE tunnel endpoints send
payloads through GRE tunnels by routing encapsulated packets through intervening
IP networks. The inner packets are not parsed along the way; only the outer IP
packets are parsed as they are forwarded towards the GRE tunnel endpoint, where
the GRE encapsulation is removed, and the payload is forwarded to its final
destination.
4.2.12.2
In soft GRE, only one side of the tunnel needs to be configured; the other end learns
the remote IP addresses of all remote tunnel endpoints by examining the incoming
GRE packets.
GRE tunnels can be automatically created when devices attach to the AP,
eliminating the need for each AP to be explicitly provisioned on the WLAN Gateway.
Because this soft GRE is stateless and the tunnel contexts are created based on
need, the WLAN Gateway does not need to maintain states for unused tunnels,
which improves scalability.
The operator can restrict the traffic going through the GRE tunnel based on the
SSIDs or LAN ports.
Figure
Figure 9
Issue: 01
Release 05.08.01a | August 2018 | Edition 01

Soft GRE

9 shows the soft GRE architecture.
Soft GRE-based architecture
TR-069 VLAN: 881
Home
Network
BRG
3FE-47555-AAAA-TCZZA
Motive
DHCP
server
Access Network
VLAN: 100
Mgmt
IPTV VLAN: 981
IPTV
Network
G-240W-G unit data sheet
Viurs
scanner
Security
VSR
Parental
Cntl
Basic
Diag.
vCPE
Qos
BW on
Demand
Soft-GRE
Tunnel
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