Sdp Ping; Sdp Keepalives - Alcatel-Lucent 7705 Service Manual

SDP Ping

Ping is an application that allows a user to test whether a particular host is reachable. SDP
Ping is an application that allows a user to test whether a particular SDP endpoint is
reachable.
SDP ping uses the SDP identifier that is stored in the 7705 SAR that originates the ping
request. SDP ping responses can be configured to return through the corresponding return
tunnel as a round-trip ping, or out-of band when unidirectional pings are requested. Refer to
the 7705 SAR OS OAM and Diagnostics Guide, "SDP Ping", for more information.

SDP Keepalives

The SDP keepalive application allows a system operator to actively monitor the SDP
operational state using periodic Alcatel-Lucent SDP Echo Request and Echo Reply
messages. Automatic SDP keepalives work in a manner that is similar to a manual SDP ping
command. The SDP Echo Request and Echo Reply messages provide a mechanism for
exchanging far-end SDP statuses.
SDP keepalive Echo Request messages are only sent after the SDP has been completely
configured and is administratively up and the SDP keepalives are administratively up. If the
SDP is administratively down, keepalives for the SDP are disabled.
SDP keepalive Echo Request messages are sent out periodically based on the configured
Hello Time. An optional message length for the Echo Request can be configured.
The SDP is immediately brought operationally down when:
After a response is received that indicates the error has cleared and the Hold Down Time
interval has expired, the SDP is eligible to be put into the operationally up state. If no other
condition prevents the operational change, the SDP enters the operational state.
Configuring SDP keepalives on a given SDP is optional. SDP keepalives have the following
configurable keepalive parameters:
7705 SAR OS Services Guide
• the Max Drop Count Echo Request messages do not receive an Echo Reply
• a keepalive response is received that indicates an error condition
• Hello Time
• Message Length
• Max Drop Count
• Hold Down Time
• Timeout
Services Overview
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