The network-parameters element enables and configures the TCP keepalive feature used for keeping H.323 connections open. This is also used for global SCTP configuration.

Parameters

tcp-keepalive-count

Enter the number of outstanding keepalives before connection is torn down

• Default: 4
• Values: Min: 1 | Max: 4294967295

tcp-keepalive-idle-timer

Enter the idle time in seconds before triggering keepalive processing. If you have upgraded the release you are running and a value outside of the acceptable range was configured in an earlier release, the default value is used and a log message is generated.

• Default: 400
• Values: Min: 30 | Max: 7200

tcp-keepalive-mode

Enter the TCP keepalive mode

• Default: 0
• Values:
  • 0—The sequence number is sent un-incremented
  • 1—The sequence number is sent incremented
  • 2—No packets are sent
  • 3—Send RST (normal TCP operation)

tcp-keepinit-timer

Enter the TCP connection timeout period if a TCP connection cannot be established. If you have upgraded the release you are running and a value outside of the acceptable range was configured in an earlier release, the default value is used and a log message is generated.

• Default: 75
• Values: 0-999999999

tcp-keepalive-interval-timer

Enter the TCP retransmission time if a TCP connection probe has been idle for some amount of time

• Default: 75
• Values: Min: 15 / Max: 75

sctp-send-mode

Leave this parameter set to its default (unordered) so data delivery can occur without regard to stream sequence numbering. If data delivery must follow stream sequence number, change this parameter to ordered.

• Default: unordered
• Values: ordered | unordered

sctp-rto-initial

Sets the initial value of the SCTP retransmit timeout (RTO).

• Default: 3000 msec (value recommended by RFC 4960)
• Values: 0-4294967295

sctp-rto-max

Sets the maximum value of the SCTP retransmit timeout (RTO).

• Default: 60000 msec (value recommended by RFC 4960)
• Values: 0-4294967295

sctp-rto-min

Sets the maximum value of the SCTP retransmit timeout (RTO).

• Default: 1000 msec (value recommended by RFC 4960)
• Values: 0-4294967295

sctp-hb-interval

Sets the initial value of the SCTP Heartbeat Interval timer.

• Default: 30000 msec (value recommended by RFC 4960)
• Values: 0-4294967295

sctp-max-burst

Sets the maximum number of DATA chunks contained in a single SCTP packet.

• Default: 4 DATA chunks (value recommended by RFC 4960)
• Values: 0-4294967295

sctp-sack-timeout

Sets the initial value of the SACK (Selective Acknowledgement) Delay timer.

• Default: 200 msec (value recommended by RFC 4960)
• Values: 0-500

sctp-assoc-max-retrans

Specifies the maximum number of consecutive unacknowledged retransmissions to a specific SCTP endpoint. Should this value be exceeded, the endpoint is considered to be unreachable, and the SCTP association is placed in the CLOSED state.

• Default: 10 retries (value recommended by RFC 4960)
• Values: 0-4294967295

sctp-path-max-retrans

Specifies the maximum number of RTO expirations/unacknowledged HEARTBEATS to a specific SCTP transport address. Should this value be exceeded, the endpoint is considered to be inactive, and an alternate transport address, if available, will be used for subsequent transmissions.

• Default: 5
• Values: 0-4294967295

options

Enter any optional features or parameters


Path

network-parameters is an element under the system path. The full path from the topmost ACLI prompt is: configure terminal , and then system , and then network-parameters