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174 AT-WR4500 Series - IEEE 802.11abgh Outdoor Wireless Routers
RouterOS v3 Configuration and User Guide
If no service name is specified in WindowsXP, it will use only service with no name. So if you want to
serve WindowsXP clients, leave your service name empty.
Property Description
authentication (multiple choice: mschap2 | mschap1 | chap | pap; default: mschap2, mschap1, chap,
pap) - authentication algorithm
default-profile (name; default: default) - default user profile to use
interface (name) - interface, which the clients are connected to
keepalive-timeout (time; default: 10) - defines the time period (in seconds) after which the router is
starting to send keepalive packets every second. If no traffic and no keepalive responses has came for that
period of time (i.e. 2 * keepalive-timeout), not responding client is proclaimed disconnected.
max-mru (integer; default: 1480) - Maximum Receive Unit. The optimal value is the MTU of the
interface the tunnel is working over decreased by 20 (so, for 1500-byte Ethernet link, set the MTU to
1480 to avoid fragmentation of packets)
max-mtu (integer; default: 1480) - Maximum Transmission Unit. The optimal value is the MTU of the
interface the tunnel is working over decreased by 20 (so, for 1500-byte Ethernet link, set the MTU to
1480 to avoid fragmentation of packets)
max-sessions (integer; default: 0) - maximum number of clients that the AC can serve
0 - unlimited
mrru (integer: 512..65535; default: disabled) - maximum packet size that can be received on the link. If a
packet is bigger than tunnel MTU, it will be split into multiple packets, allowing full size IP or Ethernet
packets to be sent over the tunnel
disabled - disable MRRU on this link
one-session-per-host (yes | no; default: no) - allow only one session per host (determined by MAC
address). If a host will try to establish a new session, the old one will be closed
service-name (text) - the PPPoE service name
The default keepalive-timeout value of 10 is OK in most cases. If you set it to 0, the router will not
disconnect clients until they log out or router is restarted. To resolve this problem, the one-session-per-
host property can be used.
Security issue: do not assign an IP address to the interface you will be receiving the PPPoE requests on
Specifying MRRU means enabling MP (Multilink PPP) over single link. This protocol is used to split big
packets into smaller ones. Under Windows it can be enabled in Networking tag, Settings button,
"Negotiate multi-link for single link connections". Their MRRU is hardcoded to 1614. This setting is
usefull to overcome PathMTU discovery failures. The MP should be enabled on both peers..
Example
To add PPPoE server on ether1 interface providing ex service and allowing only one connection per
host:
[admin@AT-WR4562] interface pppoe-server server> add interface=ether1 \
\... service-name=ex one-session-per-host=yes
[admin@AT-WR4562] interface pppoe-server server> print
Flags: X - disabled
0 X service-name="ex" interface=ether1 mtu=1480 mru=1480
authentication=mschap2,mschap,chap,pap keepalive-timeout=10
one-session-per-host=yes default-profile=default
[admin@AT-WR4562] interface pppoe-server server>