1mpcd(8) Maintenance Commands mpcd(8)
2
6 mpcd - ATM MPOA (Multi-Protocol Over ATM) client daemon
7
9 mpcd [ -s Control ATM address ] [ -l Data ATM address ] [ -c MPS con‐
10 trol ATM address ] [ -i Interface number ] [ -m MPS MAC address ] [ -L
11 LEC address [ -n ELAN name ] [ -C LECS Address ]]
12
14 MPOA client internetwork layer shortcuts. Using these shortcuts MPCs
15 forward unicast internetwork layer packets effectively over ATM without
16 need for routing protocols.
17 MPC has two roles; ingress and egress. In ingress role MPC detects
19 flows destined outside it's own subnet and tries to establish shortcuts
20 to those destinations. In egress role MPC accepts shortcuts and packets
21 arriving on those shortcuts. Maintaining shortcuts is done with the
22 help of MPOA server
23 Just as the Linux LAN Emulation client, MPOA client is also divided in
25 two parts. The parts are kernel component and a daemon process. The
26 daemon opens and receives data shortcuts and control connections with
27 the kernel component. The kernel component tallies packets flowing out
28 from the LANE device and makes the decision if a packet should be for‐
29 warded using LANE or MPOA shortcuts.
30 If the daemon is killed with SIGHUP it will close all the open connec‐
32 tions, purge ingress and egress cache entries, query LECS if applicable
33 and then restart itself.
34 Linux MPOA client only supports non-LLC-muxed shortcuts. The number of
36 supported MPOA clients is unlimited.
37
39 -s Control ATM address
40 Local ATM address this MPC uses for MPOA control connections.
41 -l Data ATM address
43 Local ATM address from and to which MPOA shortcuts are estab‐
44 lished.
45 -c MPS control ATM address
47 ATM address of MPS. Only needed if MPS can not advertise it by
48 itself.
49 -i Interface number
51 The interface number of LEC this MPC serves. E.g. 2 for "lec2".
52 -m MPS MAC address
54 MAC address of default router where MPS recides. Only useful if
55 the MPOA server fails to advertise itself.
56 -L LEC address
58 Listen address of the LANE client zeppelin. mpcd uses this
59 address as its own ATM address when it queries LECS for MPC con‐
60 figuration parameters. If this option is not present then mpcd
61 will not use LECS to query for configuration parameters. This
62 option is normally the same as zeppelin's -l option.
63 -n ELAN name
65 Name of the ELAN for which mpcd asks for parameters when it con‐
66 nects to LECS. If this option is not given, LECS should respond
67 with parameters belonging to the default ELAN if one exists.
68 This option is normally the same as zeppelin's -n option.
69 -C LECS address
71 ATM address of LECS mpcd asks for parameters. If this option is
72 left empty and -L is given, mpcd uses ATM Forum assigned Well-
73 Known LECS address. This option is normally the same as zep‐
74 pelin's -c option.
75
77 This script snippet shows how to run LANE and MPOA. After UNI sig‐
78 nalling and ILMI have been started LANE (zeppelin) and MPOA (mpcd) are
79 started. The commented out line shows how to start mpcd so that it
80 queries LECS for MPC parameters.
81 Arguments jaarli[1-3] are local ATM addresses listed in file
83 /etc/hosts.atm.
84 ATM=/usr/src/atm
86 case "$1" in
87 start)
88 cd $ATM
89 if [ -x sigd/atmsigd ] ; then
90 sigd/atmsigd -b
91 fi
92 if [ -x ilmid/ilmid ] ; then
93 ilmid/ilmid -b -x
94 fi
95 if [ -x led/zeppelin ] ; then
96 led/zeppelin -2 -n sampo -i2 -l jaarli3 &
97 ifconfig lec2 10.10.10.208 \
98 netmask 255.255.255.192 \
99 broadcast 10.10.10.255
100 ifconfig lec2 up
101 route add default gw 10.10.10.193
102 fi
103 if [ -x mpoad/mpcd ] ; then
104 mpoad/mpcd -i2 -s jaarli1 -l jaarli2 &
105 #mpoad/mpcd -i2 -s jaarli1 -l jaarli2 \
106 -L jaarli3 -n sampo &
107 fi
108 ;;
109 esac
110 exit 0
111
113 Supports only Ethernet type of ELANs. Probably others too.
114
116 Heikki Vatiainen <hessu@cs.tut.fi>, Sampo Saaristo <s156953@cs.tut.fi>
117
119 zeppelin(8), atmsigd(8)
120Linux Nov 17, 1998 mpcd(8)