33: Configuring a GRE interface 
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© Virtual Access 2017 
GW1000 Series User Manual 
Issue: 1.9    Page 307 of 350 
33.2.1  GRE connection: common configuration - general setup 
 
Figure 152: The GRE common configuration page 
Web Field/UCI/Package Option 
Web: Protocol of the new interface 
UCI: network.<if name>.proto 
Opt: proto 
Shows the protocol the interface will operate on. GRE should be 
currently selected. 
Web: Tunnel IP Address 
UCI: network.<if name>.ipaddr 
Opt: ipaddr 
Configures local IP address of the GRE interface. 
 
Web: Mask Length 
UCI: network.<if name>.mask_length 
Opt: mask_length 
Subnet mask, in CIDR notation, to be applied to the tunnel.  
Typically '30' for point-to-point tunnels.