Digi TransPort WR11 - Page 272

Configuring network interfaces ConfigureGeneric Routing Encapsulation (GRE)interfaces
Digi TransPort® Routers User Guide
272
Enable GRE checksums
Selects whether to add GRE checksums to GRE packets when the router is terminating a GRE
tunnel. Set this parameter to off to disable checksums, and to on to enables checksums.
Enable IGMP on this GRE tunnel
This IGMP parameter enables or disables the transmission and reception of IGMP packets on
this interface. IGMP advertises members of multicast groups. If IGMP is enabled, and a
member of a multicast group is discovered on this interface, multicast packets for this group
received on other interfaces are sent out this interface.
Enable DNS inbound blocking
Enables or disables blocking DNS requests on the GRE tunnel, to prevent the tunnel from
responding to DNS requests over this interface.
Enable IP analysis
When set to on, the un-encapsulated IP traffic is captured into the analyser trace.
Enable Tunnel analysis
When set to on, the GRE encapsulated packets and keepalives is captured to the analyser
trace.
3. Click Apply.
Command line
Command Instance Parameter Values Equivalent web parameter
tun n metric Numeric Metric
value
Metric for the route associated with this
interface
tun n MTU MTU value Maximum transmission unit size
tun n tunkey Key number Key number
tun n Firewall on,off Turn firewall on or off
tun n csum on,off Enable GRE checksums
tun n block_dns on,off Enable DNS inbound blocking
tun n igmp on, off Enable IGMP packets
tun n ipanon on, off Enable IP analysis for traffic on this
interface
tun n tunanon on, off Enable GRE tunnel analysis
Note RIP Routing Parameters-command line only: In the command-line interface, there are
commands and sub-parameters for GRE Tunnels that specifically relate to RIP. See Configure Routing
Information Protocol (RIP) settings to configure these sub parameters.