NAME

       icp.config - Traffic Server ICP configuration file

       The icp.config file defines ICP peers (parent and sibling caches).

       IMPORTANT:
          After  you modify the icp.config file, navigate to the Traffic Server bin directory and
          run the traffic_line -x command to apply the changes. When you apply the changes  to  a
          node  in a cluster, Traffic Server automatically applies the changes to all other nodes
          in the cluster.

FORMAT

       Each line in the icp.config file contains the name and  configuration  information  for  a
       single ICP peer in the following format:

          host : host_IP : peer_type : proxy_port : icp_port : MC_on : MC_IP : MC_TTL :

       Each field is described in the following list.

       ``host`` {#host}
              The hostname of the ICP peer.

              This  field  is  optional;  if you do not specify the hostname of the ICP peer, you
              must specify the IP address.

       ``host_IP`` {#host_IP}
              The IP address of the ICP peer.

              This field is optional; if you do not specify the IP address of the ICP  peer,  you
              must specify the hostname.

       ``ctype`` {#ctype}
              Use the following options:

              • 1 to indicate an ICP parent cache

              • 2 to indicate an ICP sibling cache

       ``proxy_port`` {#proxy_port}
              The port number of the TCP port used by the ICP peer for proxy communication.

       ``icp_port`` {#icp_port}
              The port number of the UDP port used by the ICP peer for ICP communication.

       ``MC_on`` {#mc_on}
              Enable or disable MultiCast:

              • 0 if multicast is disabled

              • 1 if multicast is enabled

       ``MC_ip`` {#mc_ip}
              The MultiCast IP address.

       ``MC_ttl`` {#mc_ttl}
              The multicast time to live. Use the following options:

              • 1 if IP multicast datagrams will not be forwarded beyond a single subnetwork

              • 2  to  allow delivery of IP multicast datagrams to more than one subnet (if there
                are one or more multicast routers attached to the first hop subnet).

EXAMPLES

       The following example configuration is for three nodes: the local host,  one  parent,  and
       one sibling.

          localhost:0.0.0.0:3:8080:3130:0:0.0.0.0:1
          host1:123.12.1.23:1:8080:3131:0:0.0.0.0:1
          host2:123.12.1.24:2:8080:3131:0:0.0.0.0:1

COPYRIGHT

       2014, dev@trafficserver.apache.org