Allied Telesis AT-WR4500 manual EoIP Setup

AT-WR4500 Series - IEEE 802.11abgh Outdoor Wireless Routers	151
RouterOS v3 Configuration and User Guide

The EoIP interface appears as an Ethernet interface under the interface list.

This interface supports all features of an Ethernet interface. IP addresses and other tunnels may be run over the interface.

The EoIP protocol encapsulates Ethernet frames in GRE (IP protocol number 47) packets (just like PPTP) and sends them to the remote side of the EoIP tunnel.

Maximal number of EoIP tunnels is 65536.

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WDS significantly faster than EoIP on wireless links (up to 10-20%), so it is recommended to use WDS whenever possible.

8.1.2 EoIP Setup

Submenu level: /interface eoip

Property Description

arp (disabled enabled proxy-arp reply-only; default: enabled) - Address Resolution Protocol mac-address(MAC address) - MAC address of the EoIP interface. You can freely use MAC addresses that are in the range from 00-00-5E-80-00-00to 00-00-5E-FF-FF-FF

mtu (integer; default: 1500) - Maximum Transmission Unit. The default value provides maximal compatibility

name (name; default: eoip-tunnelN) - interface name for reference

remote-address- the IP address of the other side of the EoIP tunnel - must be a RouterOS router tunnel-id(integer) - a unique tunnel identifier

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tunnel-id is method of identifying tunnel. There should not be tunnels with the same tunnel-id on the same router. tunnel-id on both participant routers must be equal.

mtu should be set to 1500 to eliminate packet refragmentation inside the tunnel (that allows transparent bridging of Ethernet-like networks, so that it would be possible to transport full-sized Ethernet frame over the tunnel).

When bridging EoIP tunnels, it is highly recommended to set unique MAC addresses for each tunnel for the bridge algorithms to work correctly. For EoIP interfaces you can use MAC addresses that are in the range from 00-00-5E-80-00-00 to 00-00-5E-FF-FF-FF, which IANA has reserved for such cases.

Alternatively, you can set the second bit of the first byte to mark the address as locally administered address, assigned by network administrator, and use any MAC address, you just need to ensure they are unique between the hosts connected to one bridge.

Example

To add and enable an EoIP tunnel named to_mt2 to the 10.5.8.1 router, specifying tunnel-idof 1:

[admin@AT-WR4562] interface eoip> add name=to_mt2 remote-address=10.5.8.1 \ \... tunnel-id 1

[admin@AT-WR4562] interface eoip> print Flags: X - disabled, R - running

0 X name="to_mt2" mtu=1500 arp=enabled remote-address=10.5.8.1 tunnel-id=1

[admin@AT-WR4562] interface eoip> enable 0

[admin@AT-WR4562] interface eoip> print Flags: X - disabled, R - running

0 R name="to_mt2" mtu=1500 arp=enabled remote-address=10.5.8.1 tunnel-id=1

[admin@AT-WR4562] interface eoip>