TRB255 Routes

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Main Page > EOL Products > TRB255 > TRB255 Manual > TRB255 WebUI > TRB255 Status section > TRB255 Routes

The information in this page is updated in accordance with firmware version TRB2_R_00.07.11.3.


Summary

The Routes page displays the router's ARP table and active IPv4 and IPv6 routes. This chapter is an overview of the Routes page of TRB255 routers.

If you're having trouble finding this page or some of the parameters described here on your device's WebUI, you should turn on "Advanced WebUI" mode. You can do that by clicking the "Advanced" button, located at the top of the WebUI.

General Routes

ARP


The Address Resolution Protocol (ARP) is a communication protocol used for mapping an Internet Protocol address (IP address) to a physical machine's link layer address (MAC address) belonging to the local network.

The ARP section displays the router's ARP cache (also known as ARP table) data. The ARP cache contains information on each known MAC address and its corresponding IP address. When the router receives a packet destined for a local host, the ARP program attempts to find a physical host or MAC address in the ARP cache that matches the IP address. If the ARP cache doesn't contain the needed IP address, ARP broadcasts a request packet to all LAN machines in order to find the device with the IP address in question.

The figure below is an example of the ARP cache section:

Field name Value Description
IP address ip; Default: none IP address of a local host.
MAC address mac; Default: none MAC address of a local host.
Interface string; Default: none Interface through which the router is associated with the host.

You can also view the ARP cache via shell using the arp or ip neigh commands, depending on which output your prefer:

root@Teltonika-TRB255:~# arp
IP address       HW type     Flags       HW address            Mask     Device
192.168.1.151    0x1         0x2         18:d6:c7:00:00:00     *        br-lan
root@Teltonika-TRB255:~# ip neigh
192.168.1.151 dev br-lan lladdr 18:d6:c7:00:00:00 REACHABLE

IPv4 Routes


The IPv4 Routes section displays the router's routing table. A routing table contains a list of routes to network destinations associated with and known by the router.

The figure below is an example of the Active IP routes section:

Field name Value Description
Network string; Default: none Associated network interface name.
Target ip | ip/netmask; Default: none Destination network address.
IPv4 gateway ip; Default: none Indicates the IP address of the gateway through which the target network can be reached.
Metric integer [0..4,294,967,295]; Default: none Metrics help the router choose the best route among multiple feasible routes to a destination. The route will go in the direction of the gateway with the lowest metric value.
Table string | integer; Default: none Name or number of the associated routing table.

You can also view the routing table via shell using the route or ip route commands, depending on which output your prefer:

root@Teltonika-TRB255:~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.2.1     0.0.0.0         UG    0      0        0 eth1
192.168.1.0     *               255.255.255.0   U     0      0        0 br-lan


root@Teltonika-TRB255:~# ip route
default via 192.168.2.1 dev eth1
192.168.1.0/24 dev br-lan  proto kernel  scope link  src 192.168.1.1

IPv6 routes


The IPv6 Routes section displays the router's IPv6 routing table.

The figure below is an example of the IPv6 routes section:

Field name Value Description
Network string; Default: none Associated network interface name.
Target ip6 | ip6/netmask; Default: none Destination network address.
IPv6-Gateway ip6 | ip6/netmask; Default: none Source of the network address.
Metric integer [0..4,294,967,295]; Default: none Metrics help the router choose the best route among multiple feasible routes to a destination. The route will go in the direction of the gateway with the lowest metric value.
Table string | integer; Default: none Name or number of the associated routing table.

You can also view the routing table via shell using the route -A inet6 or ip -6 route show commands, depending on which output your prefer:

root@Teltonika-TRB255:~# ip -6 route
fdb2:7fc0:b88f::/64 dev br-lan  proto static  metric 1024 
ff00::/8 dev eth1  proto kernel  metric 256 
ff00::/8 dev br-lan  proto kernel  metric 256 
ff00::/8 dev ath1  proto kernel  metric 256

IPv6 Neighbours


The IPv6 Neighbours section displays IPv6 associated neighbours.

The figure below is an example of the Active IPv6 Neighbours section:

Field name Value Description
IPv6 Address ip6; Default: none IPv6 address of the associated neighbour.
MAC Address ip6; Default: none MAC address of the associated neighbour.
Interface string; Default: none Name of the associated network interface.

Dynamic routes

The Dynamic routes page contains multiple sections, each of which displays the routing data of a Dynamic Routing protocol supported by the device. Data is only displayed once a protocol is configured and enabled. Else, each section is empty.