Setting Optional Parameters

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JUNOSe 9.1.x Link Layer Configuration Guide > Configuring ATM > Setting Optional Parameters
Setting Optional Parameters

You can also set the following parameters:
Set the administrative state of an ATM AAL5 interface to disabled.
host1(config-if)#atm aal5 shutdown
Enable CAC on the interface.
host1(config-if)#atm cac 3000000 ubr 3000
Configure the clock source.
host1(config-if)#atm clock internal
Configure framing on a T3/E3 physical interface.
host1(config-if)#atm framing g751adm
Enable ILMI on the interface.
host1(config-if)#atm ilmi-enable
Set the ILMI keepalive timer.
host1(config-if)#atm ilmi-keepalive 5
Specify the cable length (line build-out) for the ATM interface.
host1(config-if)#atm lbo long
Set the administrative state of the ATM interface to disabled.
host1(config-if)#atm shutdown
Configure SNMP link status traps on the interface.
host1(config-if)#atm snmp trap link-status
host1(config-if)#atm aal5 snmp trap link-status
Set the operational mode of the physical interface to SDH STM1.
host1(config-if)#atm sonet stm-1
Configure the UNI version of ILMI using one of the following methods:
Enable auto configuration of ILMI.
host1(config-if)#atm auto-configuration
Set the UNI version that the router uses when ILMI link autodetermination is unsuccessful or ILMI is disabled.
host1(config-if)#atm uni-version 4.0
Configure the number of virtual circuits for each virtual path.
host1(config-if)#atm vc-per-vp 128
Configure a virtual path tunnel and its traffic parameters.
host1(config-if)#atm vp-tunnel 2 128
Enable scrambling of the ATM cell payload on a T3 or an E3 interface.
host1(config-if)#ds3-scramble
Set the time interval at which the router records bit and packet rates.
host1(config-if)#load-interval 90
Place the interface into loopback mode for router-to-router testing.
host1(config-if)#loopback diagnostic
Disable an interface.
host1(config-if)#shutdown
Optional Tasks on ATM 1483 Subinterfaces

You can perform the following optional tasks on ATM 1483 subinterfaces:
Set the MTU.
host1(config-subif)#atm atm1483 mtu 7800
Configure SNMP link status traps.
host1(config-subif)#atm atm1483 snmp trap link-status
Set the administrative state of an ATM 1483 subinterface to disabled.
host1(config-subif)#atm atm1483 shutdown
Configure an advisory receive speed.
host1(config-subif)#atm atm1483 advisory-rx-speed 2000
atm aal5 shutdown
Use to set an ATM AAL5 interface administrative state to disabled.

When you set the administrative state of the ATM AAL5 interface to disabled, the router automatically disables all F5 OAM services configured on the associated VC, and prevents the VC from receiving or transmitting F5 OAM cells.

Example
host1(config-if)#atm aal5 shutdown
Use the no version to enable a disabled interface.
atm aal5 snmp trap link-status
Use to enable SNMP link status traps on the AAL5 layer interface.

Example
host1(config-if)#atm aal5 snmp trap link-status
Use the no version to disable the traps.
atm atm1483 advisory-rx-speed
Use to set an advisory receive speed for an ATM 1483 subinterface. This setting has no effect on data forwarding. You can use it to indicate the speed of the client interface. When traffic is tunneled with L2TP, the advisory receive speed is sent from the LAC to the LNS. See JUNOSe Broadband Access Configuration Guide, Chapter 12, Configuring an L2TP LAC for additional information about the advisory receive speed.

NOTE: If you specify an advisory receive speed greater than 4294967 kbps, the speed is not accurately represented in the L2TP AVP, which is in bits per second (bps).

The range is 0–2147483647 kbps.

Example
host1(config-subif)#atm atm1483 advisory-rx-speed 2000
Use the no version to restore the default behavior—the RX speed is not sent to the LNS.
atm atm1483 mtu
Use to set the MTU size for an ATM 1483 subinterface.

The range is 256–9180.

Example
host1(config-subif)#atm atm1483 mtu 7800
Use the no version to restore the default size of 9180.
atm atm1483 shutdown
Use to set an ATM 1483 subinterface administrative state to disabled.

When you set the administrative state of the ATM 1483 subinterface to disabled, the router automatically disables all F5 OAM services configured on the associated VC, and prevents the VC from receiving or transmitting F5 OAM cells.

Example
host1(config-subif)#atm atm1483 shutdown
Use the no version to enable a disabled subinterface.
atm atm1483 snmp trap link-status
Use to enable SNMP link status traps on an ATM 1483 layer subinterface.

Example
host1(config-subif)#atm atm1483 snmp trap link-status
Use the no version to disable the traps.
atm auto-configuration
Use to enable autoconfiguration of ILMI. Entering the atm auto-configuration command overrides any previous configuration of the atm uni-version command.

Autoconfiguration is enabled by default.

Example
host1(config-if)#atm auto-configuration
Use the no version to disable autoconfiguration and set the ILMI parameters to the UNI version configured using the atm uni-version command, which has a default value of UNI 4.0.
atm cac
Use to enable CAC on the interface. You can set a subscription limit, so you can oversubscribe the port, and the UBR weight, so you can limit the number of UBR connections.

You cannot configure CAC on an ATM interface on which you have created a bulk-configured VC range for use by a dynamic ATM 1483 subinterface. Conversely, you cannot create a bulk-configured VC range on an ATM interface on which you have configured CAC. For information about creating bulk-configured VC ranges, see Bulk Configuration of VC Ranges in Chapter 16, Configuring Dynamic Interfaces Using Bulk Configuration.

Example
host1(config-if)#atm cac 3000000 ubr 3000
Use the no version to disable CAC on the interface.
atm clock internal

Use to cause the ATM interface to generate the transmit clock internally.

You must specify one of the following:

module—Internal clock is from the line module (the default)

chassis—Internal clock is from the configured system clock
Example
host1(config-if)#atm clock internal
Use the no version to cause ATM interfaces to recover the clock from the received signal.
atm framing

Use to configure T3 or E3 framing on an ATM interface.

Specify one of the following framing types for a T3 (DS3) interface:

cbitadm—c-bit with ATM direct mapping

cbitplcp—c-bit with PLCP framing (default)

m23adm—M23 ATM direct mapping

m23plcp—M23 with PLCP framing

Specify one of the following framing types for an E3 interface:

g832adm—G.832 ATM direct mapping

g751adm—G.751 ATM direct mapping

g751plcp—G.751 PLCP mapping (default)
Example
host1(config-if)#atm framing g751adm
Use the no version to return framing to the default:
For a T3 interface, the default is cbitplcp

For an E3 interface, the default is g751plcp

atm ilmi-enable
Use to enable ILMI on the interface.

Example
host1(config-if)#atm ilmi-enable
Use the no version to disable ILMI on the interface.
atm ilmi-keepalive
Use to generate ILMI keepalive messages. This value sets the time interval in seconds between poll PDU transmissions if no sequence data PDUs are pending.

Example
host1(config-if)#atm ilmi-keepalive 5
Use the no version to disable the generation of keepalive messages.
atm lbo

Use to specify the cable length (line build-out) for the ATM T3 or E3 interface. The length of cable determines power requirements.

Specify one of the following keywords:

long—A cable length in the range 0–225 feet

short—A cable length in the range 226–450 feet (the default)
Example
host1(config-if)#atm lbo long
Use the no version to restore the default value, short.
atm shutdown
Use to set an ATM interface administrative state to disabled.

When you set the administrative state of the ATM interface to disabled, the router automatically disables all F5 OAM services configured on the associated VC, and prevents the VC from receiving or transmitting F5 OAM cells.

Example
host1(config-if)#atm shutdown
Use the no version to enable a disabled interface.
atm snmp trap link-status
Use to enable SNMP link status traps on the ATM layer interface.

Example
host1(config-if)#atm snmp trap link-status
Use the no version to disable the traps.
atm sonet stm-1
Use to set the mode of operation on the physical interface to Synchronous Digital Hierarchy (SDH) Synchronous Transport Mode (STM).
host1(config-if)#atm sonet stm-1
Use the no version to restore the default value, SONET STS-3c operation.
atm uni-version
Use to specify the UNI version for the interface to use.

Valid values are 3.0, 3.1, or 4.0.

Example
host1(config-if)#atm uni-version 4.0
There is no no version.
atm vc-per-vp
Use to configure the number of VCs for each VP. The router does not execute this command when any VCs are open on the interface.

VCs and VP tunnels must not exist when you issue this command. If they do, you must delete the VC and VP tunnel configuration before you issue this command.

The specified value must be a power of 2, or an error message is returned.

The minimum number of VCs per VP is 4096 for OCx/STMx ATM line modules. If you enter a value that is below the minimum, the router uses the minimum value.

The E120 router and the E320 router support the entire VPI/VCI range; therefore, it does not support this command.

Example
host1(config-if)#atm vc-per-vp 128
Use the no version to restore the default value.
atm vp-tunnel
Use to define a VP tunnel and configure the rate of traffic flow within the tunnel.

You specify a tunnel rate in Kbps. All circuits in the VP are restricted to the rate that you set.

If any virtual circuits are open within the VPI before the tunnel is created, the router does not execute this command.

For more information about configuring a shapeless VP tunnel for QoS, see JUNOSe Quality of Service Configuration Guide, Chapter 19, Configuring an Integrated Scheduler to Provide QoS for ATM.

Example
host1(config-if)#atm vp-tunnel 2 128
Use the no version to remove the VP tunnel. When circuits are open within the tunnel, the router does not remove the tunnel.
ds3-scramble

e3-scramble
Use to scramble the ATM cell payload on a T3 or an E3 interface. DS3 (T3) and E3 scrambling assists clock recovery on the receiving end of the interface.

Example
host1(config-if)#ds3-scramble
Use the no version to disable scrambling.
load-interval
Use to set the time interval at which the router calculates bit and packet rate counters for the ATM interface.

You can choose a multiple of 30 seconds, in the range 30–300 seconds.

Example
host1(config-if)#load-interval 90
Use the no version to return to the default setting, 300 seconds.
loopback

Use to place the interface into loopback mode.

Specify either:

diagnostic—Places the interface into internal loopback.

line—Places the interface into external loopback.
Example
host1(config-if)#loopback diagnostic
Use the no version to remove any loopback.

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