br2684ctl - RFC1483/2684 Bridge Daemon
br2684ctl [ -b ] [[ -c n ] [ -e 0|1 ] [ -p 0|1 ] [ -s sndbuf ] [
-a [itf].vpi.vci ]] ...
ATM PVC number, VPI and VCI. (Required)
-b Puts the process in the background.
-c n br2684 interface number such as 0, 1, ... (Required)
-e 0|1 Encapsulation method: 0=LLC, 1=VC mux (the default is 0
-p 0|1 Payload method: 0=Routed, 1=Bridged (the default is 1
-s sndbuf Send buffer size. Default is 8192.
br2684ctl handles RFC1483/2684 bridged PDUs. This is most often used
in ADSL scenarios where usually the subscribers’ ethernet traffic is
encapsulated in ATM AAL5 (by bridging ADSL modems) according to
RFC2684. The subscriber-side ADSL modem can be external with an
ethernet connector or an internal ADSL card in a PC. RFC1483 has been
obsoleted by RFC2684.
For example it is possible to set up your Linux box to handle several
ATM PVC’s with bridged-1483 (sometimes referred as SNAP) encapsulation.
The Linux network stack might provide DHCP, IP masquerading, IP
firewall services or bridge the Ethernet frames just like it had
several ethernet interfaces. In fact it can have several (logical)
ethernet interfaces, where ATM is just used as a carrier.
br2684ctl creates a new network interface named nas[n] which is bound
to an specific ATM PVC. It requires two mandatory arguments: -c, the
interface number, and -a, the ATM PVC. It should be noted that the
order of the command arguments matter; -c should be followed by -a. You
can create as many interfaces as necessary in one go, just make a long
command line ;)
For example, following command will create a nas0 interface which uses
the ATM PVC with VPI=0 and VCI=401. You need to configure the PVC
connection 0.401 on the ATM switch manually.
% br2684ctl -c 0 -a 0.401
The command will only create a new interface nas0. Next step is to
assign an IP address and netmask to the interface nas0 using the
ifconfig command. Using ifconfig, you can also assign a Ethernet MAC
address to the interface nas0, if necessary.
% ifconfig nas0 192.168.2.1 netmask 255.255.255.0
Messages are logged to the LOCAL2 syslog facility.
This man page is based on a tutorial by by Joonbum Byun
7 Jul 2003 br2684ctl(8)