Routing Table
Routing Table
The table below shows IPv4 and IPv6 routing information. The IPv4 subnet mask is ‘255.255.255.255’ for a host destination and ‘0.0.0.0’ for the default route. The gateway address is written as ‘*’(IPv4)/‘::’(IPv6) if none is set.
Click System Monitor > Routing Table to open the following screen.
System Monitor > Routing Table
The following table describes the labels in this screen.
System Monitor > Routing Table 
label
Description
IPv4 / IPv6 Routing Table
Destination
This indicates the destination IPv4 address or IPv6 address and prefix of this route.
Gateway
This indicates the IPv4 address or IPv6 address of the gateway that helps forward this route’s traffic.
Subnet Mask
This indicates the destination subnet mask of the IPv4 route.
Flag
This indicates the route status.
U–Up: The route is up.
!–Reject: The route is blocked and will force a route lookup to fail.
G–Gateway: The route uses a gateway to forward traffic.
H–Host: The target of the route is a host.
R–Reinstate: The route is reinstated for dynamic routing.
D–Dynamic (redirect): The route is dynamically installed by a routing daemon or redirect.
M–Modified (redirect): The route is modified from a routing daemon or redirect.
Metric
The metric represents the "cost of transmission." A router determines the best route for transmission by choosing a path with the lowest "cost." The smaller the number, the lower the "cost."
Interface
This indicates the name of the interface through which the route is forwarded.
brx indicates a LAN interface where x can be 0 – 3 to represent LAN1 to LAN4 respectively.
ptm0 indicates a VDSL (including G.fast) WAN interface using IPoE or in bridge mode.
ethx indicates an Ethernet WAN interface using IPoE or in bridge mode.
ppp0 indicates a WAN interface using PPPoE.
wlx indicates a wireless interface where x can be 0 – 1.