icp.config

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

重要

After you modify the icp.config file, navigate to the Traffic Server bin directory and run the traffic_ctl config reload 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.

フォーマット

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 : ctype : proxy_port : icp_port : MC_on : MC_IP : MC_TTL :

Each field is described in the following list.

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

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

Use the following options:

  • 1 to indicate an ICP parent cache
  • 2 to indicate an ICP sibling cache
  • 3 to indicate an ICP local cache
proxy_port
The port number of the TCP port used by the ICP peer for proxy communication.
icp_port
The port number of the UDP port used by the ICP peer for ICP communication.
MC_on

Enable or disable MultiCast:

  • 0 if multicast is disabled
  • 1 if multicast is enabled
MC_ip
The MultiCast IP address.
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).

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