mmeettiiss__ddaaeemmoonn   (1)General Commands Manual         mmeettiiss__ddaaeemmoonn   (1)



NNAAMMEE
       mmeettiiss__ddaaeemmoonn      — Metis is the CCNx 1.0 forwarder, which runs on each
       end system and as a software forwarder on intermediate systems.


SSYYNNOOPPSSIISS
       mmeettiiss__ddaaeemmoonn [----ppoorrtt _p_o_r_t]  [----ddaaeemmoonn]   [----ccaappaacciittyy  _c_o_n_t_e_n_t_S_t_o_r_e_S_i_z_e]
       [----lloogg _f_a_c_i_l_i_t_y_=_l_e_v_e_l ...]  [----lloogg--ffiillee _l_o_g_f_i_l_e]  [----ccoonnffiigg _c_o_n_f_i_g_f_i_l_e]

DDEESSCCRRIIPPTTIIOONN
       mmeettiiss__ddaaeemmoonn  is  the CCNx 1.0 forwarder, which runs on each end system
       and as a software forwarder on intermediate systems.   metis_daemon  is
       the  program  to  launch  Metis, either as a console program or a back‐
       ground daemon (detatched from console).  Once running, use the  program
       mmeettiiss__ccoonnttrrooll to configure Metis.


       Metis is structured as a set of Listeners, each of which handles a spe‐
       cific method of listening for packets.  For  example,  a  TCP  listener
       will  accept  connections on a specific TCP port on a specific local IP
       address.  An Ethernet listener will accept frames of a specific  Ether‐
       Type on a specific Interface.


       When  Metis  accepts a connection, it will create a Connection entry in
       the ConnectionTable to represent that peer.  For Ethernet, a Connection
       is the tuple {dmac, smac, ethertype}.  For TCP and UDP, it is the tuple
       {source IP, source port, destination IP, destination port}.  The connid
       (connection ID) becomes the reverse route index in the Pending Interest
       Table.


OOPPTTIIOONNSS
       --config _c_o_n_f_i_g_f_i_l_e
                 Reads configuration parameters from _c_o_n_f_i_g_f_i_l_e.   The  _-_-_p_o_r_t
                 option  has  no effect in this mode and Metis will not listen
                 to any ports.  This means that mmeettiiss__ccoonnttrrooll will not be able
                 to  connect  to  Metis  to  configure  it  further unless one
                 includes at least a listener for  TCP  localhost  or  a  unix
                 domain socket.


       --capacity _c_o_n_t_e_n_t_S_t_o_r_e_S_i_z_e
                 Sets  the  capacity  of the Content Store to _c_o_n_t_e_n_t_S_t_o_r_e_S_i_z_e
                 content objects.  Metis uses a  least-recently-used  eviction
                 policy.  A size of 0 will disable the Content Store.


                 The  Content Store sits on the fast path of the forwarder, so
                 there is a cost associated with adding and removing items  to
                 the Content Store tables.


       --daemon  Runs  Metis  in  daemon mode, detaching from the console.  It
                 must be run with the _-_-_l_o_g_-_f_i_l_e option.


       --log _f_a_c_i_l_i_t_y=_l_e_v_e_l
                 Sets the log level of the given  _f_a_c_i_l_i_t_y             to  the
                 given  _l_e_v_e_l.  The _-_-_l_o_g option may be repeated several times
                 setting the log level of different facilities.  If  the  same
                 facility  is  listed  twice,  only  the  last occurance takes
                 effect.  The default log level is Error for all facilities.


                 Facilities:

                    ·  all: All facilities.


                    ·  config: Configuration activies.


                    ·  core: Core forwarder, such as startup and shutdown.


                    ·  io: Listeners, connections, and all I/O related activi‐
                       ties.


                    ·  message: CCNx messages, such as parsing.


                    ·  processor:  Forwarding  processor, such as CS, FIB, and
                       PIT activities.



                 The log levels are:  debug,  info,  notice,  warning,  error,
                 critical, alert, off.


       --log-file _l_o_g_f_i_l_e
                 Specifies  the _l_o_g_f_i_l_e             to write all log messages.
                 This parameter is required with _-_-_d_a_e_m_o_n mode.


       --port _p_o_r_t
                 The UDP  and  TCP  port  to  listen  on.   If  no  _c_o_n_f_i_g_f_i_l_e
                 is  specified,  Metis  will listen on this port on all inter‐
                 faces including localhost.


                 If this parameter is not given, Metis uses the  default  port
                 9695.


UUSSAAGGEE
       mmeettiiss__ddaaeemmoonn  --config  metis.cfg  --log  all=info  --log  config=debug
       --log-file metis.log


SSEEEE AALLSSOO
       See mmeettiiss__ccoonnttrrooll((11)) for a description of how to  configure  mmeettiiss__ddaaee‐‐
       mmoonn.


       For  a list of all configuration lines that may be used with mmeettiiss__ccoonn‐‐
       ttrrooll and by _-_-_c_o_n_f_i_g configuration file, see mmeettiiss..ccffgg((55)).


CCAAVVEEAATTSS
          ·  A given interface may only have  one  Ethernet  listener  on  one
             EtherType.


          ·  If  there are multiple longest matching prefix entries that match
             an Interest, it will be forwarded to all those routes (i.e.  mul‐
             ticast).


          ·  Ethernet  fragmentation will only use the interface MTU and there
             is not MTU discovery.  If Metis is used in a bridged environment,
             this may lead to errors if the MTU changes on different segments,
             such as a 10G link at 9000 bytes and a  100  Mbps  link  at  1500
             bytes.


BBUUGGSS
          ·  Adding the same listener twice will cause Metis to crash.


          ·  Errors in the configuration file may cause Metis to crash.


          ·  The  command  'list  connections' will display all connections as
             TCP encapsulation.


AAUUTTHHOORR
       Marc Mosko Palo Alto Research Center



                                                            mmeettiiss__ddaaeemmoonn   (1)