57
Chapter 7
Hierarchical Caching
7. From the Type drop-down list, select:
o
Parent to indicate that the ICP peer is a parent cache.
o
Sibling to indicate that the ICP peer is a sibling cache.
8. In the Proxy Port field, enter the TCP port used by the ICP peer for ICP communication. This is the Traffic
Server’s proxy port (usually 8080).
9. In the ICP Port field, enter the UDP port used by the ICP peer for ICP communication (usually 3130).
10. From the MultiCast Member drop-down list, select:
o
No if the ICP peer is not on a multicast network with the Traffic Server.
o
Yes if the ICP peer is on a multicast network with the Traffic Server.
11. In the MultiCast IP field, enter the multicasr IP address.
12. From the MultiCast TTL drop-down list, select:
o
1 if you do not want IP multicast datagrams to be forwarded beyond a single subnetwork.
o
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).
13. Click the Add button.
14. Click the Make These Changes button.
To identify an ICP peer manually:
1. Telnet into the HP web cache appliance and select Shell Access as described in
Overview of Access
Methods‚ on page 7
.
2. Open the
icp.config
file located in Traffic Server’s
config
directory with Vi.
3. For each ICP peer you want to identify, enter a separate line in the configuration file in the following
format:
host:host_IP:cache_type:proxy port:icp
port:MC_on:MC_IP:MC_TTL
where:
Field
Description
host
Specifies the host name of the ICP peer.
host_IP
Specifies the IP address of the ICP peer.
cache_type
Specifies the type of ICP peer. Enter one of the following:
1
to indicate an ICP parent cache
2
to indicate an ICP sibling cache
proxy_port
Specifies the TCP port number used by the ICP peer for proxy communication. The
default is 8080.
icp_port
Specifies the UDP port number used by the ICP peer for ICP communication. The
default is 3130.
MC_on
Specifies multicast options. Enter one of the following:
0
if the ICP peer is not on a multicast network with the Traffic Server.
1
if the ICP peer is on a multicast network with the Traffic Server.