SCTP Parameter Template Configuration Mode Commands

SCTP Parameter Template Configuration Mode Commands
 
 
This chapter provides information about commands used to configure parameters for Stream Control Transmission Protocol (SCTP) associations. The commands become part of a template that can be associated with services running on the system.
 
 
sctp-alpha
Configures the SCTP retransmission timeout (RTO) alpha value.
Product
MME
Privilege
Administrator
Syntax
sctp-alpha value
default sctp-alpha
default
Returns the command to its default setting of 5.
value
Default: 5
Specifies the SCTP retransmission timeout alpha value. value must be an integer from 0 to 65535.
Usage
Use this command to configure the SCTP RTO alpha value. The RTO alpha value is used in calculating the smoothed round-trip time (SRTT) and the round-trip time variation (RTTVAR) for new round trip time (RTT) measurements.
Example
The following command sets the SCTP RTO alpha value to 10:
sctp-alpha 10
 
sctp-alt-accept-flag
Configures the SCTP alternate accept flag for additional life time for the association.
Product
MME
Privilege
Administrator
Syntax
sctp-alt-accept-flag { disable | enable }
default sctp-alt-accept-flag
default
Returns the command to its default setting of enable.
disable | enable
Specifies if the alternate accept flag is enabled or disabled.
Usage
Use this command to configure the SCTP alternate accept flag for additional life time for the association.
Example
The following command disables the alternate accept flag for the SCTP association:
sctp-alt-accept-flag disable
 
sctp-beta
Configures the SCTP retransmission timeout (RTO) beta value.
Product
MME
Privilege
Administrator
Syntax
sctp-beta value
default sctp-beta
default
Returns the command to its default setting of 10.
value
Default: 10
Specifies the SCTP retransmission timeout beta value. value must be an integer from 0 to 65535.
Usage
Use this command to configure the SCTP RTO beta value. The RTO beta value is used in calculating the smoothed round-trip time (SRTT) and the round-trip time variation (RTTVAR) for new round trip time (RTT) measurements.
Example
The following command sets the SCTP RTO beta value to 20:
sctp-beta 20
 
sctp-checksum-type
Configures the checksum type used to increase the integrity of the SCTP packets during transmission.
Product
MME
Privilege
Administrator
Syntax
sctp-checksum-type { adler32 | crc32 }
default sctp-checksum-type
default
Returns the command to its default setting of CRC32.
adler32 | crc32
Specifies the type of checksum used to increase data integrity of SCTP packets.
adler32: Specifies that the Adler-32 checksum algorithm is used to increase data integrity for SCTP packets.
crc32: Specifies that a 32-bit cyclic redundancy check is used to increase data integrity of SCTP packets.
Usage
Use this command to select the checksum for data integrity of SCTP packets.
Example
The following command enables the Adler-32 checksum algorithm used to increase data integrity of SCTP packets:
sctp-checksum-type adler32
 
sctp-cookie-life
Configures the lifetime of the SCTP cookie.
Product
MME
Privilege
Administrator
Syntax
sctp-cookie-life value
default sctp-cookie-life
default
Returns the command to its default setting of 600 (60000 milliseconds).
value
Default: 600 (60000 milliseconds)
Specifies the lifetime of the SCTP cookie. value must be an integer from 50 to 1200. The range translates to 5000 milliseconds to 120000 milliseconds as the granularity of the value variable is in 100 millisecond increments.
Usage
Use this command to configure the lifetime of the SCTP cookie.
Example
The following command configures the lifetime of the SCTP cookie to 80000 milliseconds:
sctp-cookie-life 800
 
sctp-max-assoc-retx
Configures the maximum number of retransmissions for SCTP associations.
Product
MME
Privilege
Administrator
Syntax
sctp-max-assoc-retx value
default sctp-max-assoc-retx
default
Returns the command to its default setting of 10.
value
Default: 10
Specifies the maximum number of retransmissions allowed by this template for SCTP associations. value must be an integer from 0 to 255.
Usage
Use this command to configure the maximum number of retransmissions allowed by this template for SCTP associations.
Example
The following command configures the maximum number of retransmissions to 7:
sctp-max-assoc-retx 7
 
sctp-max-in-strms
Configures the maximum number of incoming SCTP streams allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-max-in-strms value
default sctp-max-in-strms
default
Returns the command to its default setting of 16.
value
Default: 16
Specifies the maximum number of incoming SCTP streams allowed by the template. value must be an integer from1 to 65535.
Usage
Use this command to configure the maximum number of incoming SCTP streams allowed by the template.
Example
The following command configures the maximum number of incoming SCTP streams allowed by the temple to 32:
sctp-max-in-strms 32
 
sctp-max-init-retx
Configures the maximum number of retransmissions of SCTP initiations allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-max-init-retx value
default sctp-max-init-retx
default
Returns the command to its default setting of 5.
value
Default: 5
Specifies the maximum number of retransmissions of SCTP initiations allowed by the template. value must be an integer from 0 to 255.
Usage
Use this command to configure the maximum number of retransmissions of SCTP initiations allowed by the template.
Example
The following command configures the maximum number of retransmissions of SCTP initiations allowed by the template to 10:
sctp-max-init-retx 10
 
sctp-max-mtu-size
Configures the maximum transmission unit (MTU) size, in bytes, for SCTP streams allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-max-mtu-size bytes
default sctp-max-mtu-size
default
Returns the command to its default setting of 1500 bytes.
bytes
Default: 1500
Specifies the maximum MTU size, in bytes, for SCTP streams allowed by the template. bytes must be an integer value from 508 to 65535.
Usage
Use this command to configure the maximum MTU size, in bytes, for SCTP streams allowed by the template.
Example
The following command configures the maximum MTU size for SCTP streams allowed by the template to 3000:
sctp-max-mtu-size 3000
 
sctp-max-out-strms
Configures the maximum number of outgoing SCTP streams allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-max-out-strms value
default sctp-max-out-strms
default
Returns the command to its default setting of 16.
value
Default: 16
Specifies the maximum number of outgoing SCTP streams allowed by the template. value must be an integer from1 to 65535.
Usage
Use this command to configure the maximum number of outgoing SCTP streams allowed by the template.
Example
The following command configures the maximum number of outgoing SCTP streams allowed by the temple to 32:
sctp-max-out-strms 32
 
sctp-max-path-retx
Configures the maximum number of retransmissions of SCTP paths allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-max-path-retx value
default sctp-max-path-retx
default
Returns the command to its default setting of 5.
value
Default: 5
Specifies the maximum number of retransmissions of SCTP paths allowed by the template. value must be an integer from 0 to 255.
Usage
Use this command to configure the maximum number of retransmissions of SCTP paths allowed by the template. An SCTP path is a connection between an endpoint address and a peer endpoint address.
Example
The following command configures the maximum number of retransmissions of SCTP paths allowed by the template to 10:
sctp-max-path-retx 10
 
sctp-min-mtu-size
Configures the minimum maximum transmission unit (MTU) size, in bytes, for SCTP streams allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-min-mtu-size bytes
default sctp-min-mtu-size
default
Returns the command to its default setting of 508 bytes.
bytes
Default: 508
Specifies the minimum MTU size, in bytes, for SCTP streams allowed by the template. bytes must be an integer value from 508 to 65535.
Usage
Use this command to configure the minimum MTU size, in bytes, for SCTP streams allowed by the template.
Example
The following command configures the minimum MTU size for SCTP streams allowed by the template to 1000:
sctp-min-mtu-size 1000
 
sctp-rto-initial
Configures the initial time for SCTP retransmission timeouts (RTOs) allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-rto-initial value
default sctp-rto-initial
default
Returns the command to its default setting of 30 (3000 milliseconds).
value
Default: 30 (3000 milliseconds)
Specifies the initial time for SCTP RTO. value must be an integer from 1 to 1200. The granularity for value is in 100ms increments (20 = 2000ms).
Usage
Use this command to configure the initial time for SCTP RTOs allowed by the template.
Example
The following command configures the initial SCTP RTO to 6000ms:
sctp-rto-initial 60
 
sctp-rto-max
Configures the maximum time for SCTP retransmission timeouts (RTOs) allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-rto-max value
default sctp-rto-max
default
Returns the command to its default setting of 600 (60000 milliseconds).
value
Default: 600 (60000 milliseconds)
Specifies the maximum time for SCTP RTOs allowed by the template. value must be an integer from 50 to 1200. The granularity for value is in 100ms increments (120 = 12000ms).
Usage
Use this command to configure the maximum time for SCTP RTOs allowed by the template.
Example
The following command configures the maximum time for SCTP RTOs allowed by the template to 120000ms:
sctp-rto-max 120
 
sctp-rto-min
Configures the minimum time for SCTP retransmission timeouts (RTOs) allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-rto-min value
default sctp-rto-min
default
Returns the command to its default setting of 10 (1000 milliseconds).
value
Default: 10 (1000 milliseconds)
Specifies the minimum time for SCTP RTOs allowed by the template. value must be an integer from 1 to 500. The granularity for value is in 100ms increments (20 = 2000ms).
Usage
Use this command to configure the minimum time for SCTP RTOs allowed by the template.
Example
The following command configures the minimum time for SCTP RTOs allowed by the template to 2000ms:
sctp-rto-min 20
 
sctp-sack-frequency
Configures the frequency of SCTP selective acknowledgements allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-sack-frequency value
default sctp-sack-frequency
default
Returns the command to its default setting of 2.
value
Default: 2
Specifies the frequency of SCTP selective acknowledgements allowed by the template. value must be an integer from 1 to 20.
Usage
Use this command to configure the frequency of SCTP selective acknowledgements allowed by the template.
Example
The following command configures the frequency of SCTP selective acknowledgements allowed by the template to 10:
sctp-sack-frequency 10
 
sctp-sack-period
Configures the period for SCTP selective acknowledgements allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-sack-period { value | units-10ms value }
default sctp-sack-period
default
Returns the command to its default setting of 2 (200 milliseconds).
value
Default: 2 (200 milliseconds)
Specifies the period for SCTP selective acknowledgements allowed by the template. value must be an integer from 0 to 5. The granularity for value is in 100ms increments (3 = 300ms).
units-10ms value
Specifies that the integer added as value is to be calculated using 10ms granularity for this command. value must be an integer from 0 to 50.
Usage
Use this command to configure the period for SCTP selective acknowledgements allowed by the template.
Example
The following command configures the period for SCTP selective acknowledgements allowed by the template to 400ms (using the 10ms granularity):
sctp-sack-period units-10ms 40
 
sctp-start-mtu-size
Configures the start maximum transmission unit (MTU) size, in bytes, for SCTP streams allowed by the template.
Product
MME
Privilege
Administrator
Syntax
sctp-start-mtu-size bytes
default sctp-start-mtu-size
default
Returns the command to its default setting of 1500 bytes.
bytes
Default: 1500
Specifies the start MTU size, in bytes, for SCTP streams allowed by the template. bytes must be an integer value from 508 to 65535.
Usage
Use this command to configure the start MTU size, in bytes, for SCTP streams allowed by the template.
Example
The following command configures the start MTU size for SCTP streams allowed by the template to 3000:
sctp-start-mtu-size 3000
 
timeout
Configures timeouts for SCTP data chunk bundle transmissions and/or SCTP heartbeat request responses.
Product
MME
Privilege
Administrator
Syntax
timeout { sctp-bundle value | sctp-heart-beat value }
[ default | no ] timeout { sctp-bundle | sctp-heart-beat }
default
Returns the command to its default setting of disabled for sctp-bundle and 30 seconds for sctp-heart-beat.
no
Removes the selected configuration.
sctp-bundle value
Default: disabled
Specifies that SCTP data chunks are to be queued until this timer expires at which time the data chunks are bundled and committed for transmission. value must be an integer from 1 to 65535. The granularity for value is in 100ms increments (10 = 1000ms or 1 second).
sctp-heart-beat value
Default: 30 seconds
Specifies the SCTP heartbeat timeout in seconds. value must be an integer from 1 to 300. An SCTP heartbeat is sent o a peer to determine reachability. If an acknowledgement is not received before this timer runs out, heartbeat requests are no longer sent and the peer is considered unreachable.
Usage
Use this command to configure timeouts for SCTP data chunk bundle transmissions and/or SCTP heartbeat request responses.
Example
The following command enables the SCTP data chunk bundle timeout value and configures it to 2 seconds:
timeout sctp-bundle 20
 
 
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