Cisco Catalyst 2000 Configuration Handbook page 175

154 Cisco LAN Switching Configuration Handbook
(Optional) Use SLB Dynamic Feedback Protocol (DFP).
4.
a. (Optional) Use the DFP manager to communicate with DFP agents on servers.
b. (Optional) Use a DFP agent to provide DFP reports.
(CASA) mechanism. When a failure occurs, the backup SLB device already has
the current state information and can immediately take over.
This information is sent from the listening-ip address (an interface on the local
device) to the remote-ip address (an interface on the backup device), using TCP
port port-number (1 to 65,535). Replication messages are sent at interval sec-
onds (1 to 300, default 10).
A password (text string; use 0 if unencrypted, the default, or 7 if encrypted)
can be used for MD5 authentication with the backup device. The optional
timeout (0 to 65,535 seconds; default 180 seconds) defines a time period when
the password can be migrated from an old value to a new one. During this time,
both old and new passwords are accepted.
CSM replicates its connection information using the Content Switching
Replication Protocol (CSRP). The sticky connection database or the regular
connection database can be replicated. To replicate both, choose each one in a
separate replicate csrp command.
■ Enable the DFP manager:
(global) ip slb dfp [password [0|7] password [timeout]]
The router can become a DFP load-balancing manager. DFP can be configured
with a password (text string; use 0 if unencrypted, the default, or 7 if
encrypted) for MD5 authentication with a host agent. The optional timeout (0
to 65,535 seconds; default 180 seconds) defines a time period when the pass-
word can be migrated from an old value to a new one. During this time, both
old and new passwords are accepted.
■ Specify a DFP agent:
(slb-dfp) agent ip-address port-number [timeout [retry-count [retry-
interval]]]
A DFP agent on a real server is identified by its ip-address and the port-num-
ber number used. The DFP agent (the server) must contact the DFP manager
(the IOS SLB device) at timeout intervals (0 to 65,535 seconds; default 0 sec-
onds or no timeout period). The DFP manager attempts to reconnect to the
agent retry-count (0 to 65,535 retries; default 0 retries or an infinite number)
times, at intervals of retry-interval (1 to 65,535 seconds; default 180 seconds).
Define the agent:
■
(global) ip dfp agent subsystem-name
The DFP agent sends periodic reports to its manager, a distributed director
device. The subsystem-name (text string up to 15 characters) enables the man-