[no] port {aps-id}
config
This command enables access to the context to configure APS on SONET/SDH ports and assigns an APS group ID. Both working and protection circuits must be configured with the same APS group ID on either the same 7705 SAR node (SC-APS) or on two 7705 SAR nodes (MC-APS).
keyword
1 to 8
aps
config>port
This command configures APS on SONET/SDH ports. An APS group contains a working and protection circuit with the same APS group ID on either a single 7705 SAR node (SC-APS) or on two 7705 SAR nodes (MC-APS).
The working circuit must be connected to the peer working circuit, and the protection circuit must be connected to the peer protection circuit.
The aps command is only available for APS groups, not for physical ports.
advertise-interval advertise-interval
no advertise-interval
config>port>aps
This command specifies the time interval, in 100s of milliseconds, between ‟I am operational” messages sent by the protection and working circuits to their neighbor in an MC-APS group. The advertise-interval value is valid only for an MC-APS.
10
the time interval, in 100s of milliseconds, between transmitted operational messages
hold-time hold-time
no hold-time
config>port>aps
This command specifies how much time can pass without the node receiving an advertise packet from its neighbor before the MC-APS signaling link is considered operationally down. The hold time is in 100s of milliseconds and is usually the advertise-interval value multiplied by 3.
specifies, in 100s of milliseconds, how long to wait for an APS advertise packet before the neighbor in an MC-APS group is considered operationally down.
hold-time-aps {[lsignal-fail sf-time] [lsignal-degrade sd-time]}
no hold-time-aps
config>port>aps
This command configures hold-down timers to debounce signal failure conditions (lais, b2err-sf) and signal degrade conditions (b2err-sd) for 1+1 unidirectional SC-APS switching mode. If the signal fail or signal degrade conditions exceed the configured hold-down time, APS is activated.
no hold-time-aps (values are 0)
the signal failure hold-down time in milliseconds, from 1 to 100
the signal degrade hold-down time in milliseconds, from 1 to 100
neighbor ip-address
no neighbor
config>port>aps
This command specifies the neighbor's IP address in an MC-APS group. When the value of the neighbor IP address is set to 0.0.0.0, or not set, this implies that the APS group is configured as an SC-APS group.
The route to the neighbor must not traverse the MC-APS member (working or protection) circuits. It is recommended that the neighbor IP address configured be on a shared network between the routers that own the working and protection circuits. The node should be connected with a direct interface to ensure optimum failover time.
By default, no neighbor address is configured and both the working and protection circuits should be configured on the same router as an SC-APS group.
0.0.0.0
specifies the neighbor's IP address for MC-APS.
protect-circuit port-id
no protect-circuit
config>port>aps
This command configures a physical port that will act as the protection circuit for this APS group.
The protection circuit port must contain only the default configuration and cannot belong to another APS group. The protection circuit port must be of the same type as the working circuit (SONET/SDH) for the APS group; if it is not, the command will return an error.
A protection circuit can only be added if the working circuit already exists. The protection circuit must be removed from the configuration before the working circuit can be removed.
When a port is a protection circuit of an APS group, the configuration options available in the config>port port-id>sonet-sdh context are not allowed for that port unless they are in the following exception list:
clock-source
[no] loopback
[no] report-alarm
section-trace
[no] threshold
When a port is configured as a protection circuit of an APS group, the configurations listed above and all service configurations related to the APS port are operationally inherited by the protection circuit. If the protection circuit cannot inherit the configurations (due to resource limitations), the configuration attempt fails and an error is returned to the user.
The protection circuit must be shut down before it can be removed from the APS group port. The inherited configuration for the circuit and APS operational commands for that circuit are not preserved when the circuit is removed from the APS group.
The no form of this command removes the protection circuit.
n/a
the physical port that will act as the protection circuit for this APS group in the format slot/mda/port
[no] rdi-alarms {suppress | circuit}
config>port>aps
This command configures how RDI alarms (line, path, section) are generated on physical circuits of an APS port. The command is only supported in 1+1 unidirectional SC-APS mode. When you configure RDI alarms on a port on the 2-port OC3/STM1 Channelized Adapter card, the second port is automatically configured with a matching RDI alarms setting. As a consequence, both ports will then support only 1+1 unidirectional SC-APS mode.
circuit
RDI hardware generation on working and protection circuits is suppressed. No alarms are generated upon an Rx failure of that circuit.
RDI alarms are hardware-generated independently on each working and protection circuit based on an Rx failure of that circuit, regardless of APS line status
revert-time minutes
no revert-time
config>port>aps
This command configures how long the 7705 SAR waits before switching back to the working circuit after it has been restored to service.
If the minutes value is changed, it takes effect at the next initiation of the wait-to-restore (WTR) timer.
This command does not modify the length of a WTR timer that has already been started. The WTR timer of a non-revertive switch can be assumed to be infinite.
The no form of this command restores the default (non-revertive) mode – the switch back does not occur unless the protection circuit fails or it is manually switched by the operator.
the time to wait, in minutes, before reverting to the working circuit after it has been restored to service
switching mode {bi-directional | uni-1plus1}
config>port>aps
This command configures the switching mode for the APS port. SC-APS supports both bi-directional and uni-1plus1; MC-APS supports only bi-directional switching mode.
bi-directional
provides protection in both directions
provides protection in one direction
working-circuit port-id
no working-circuit
config>port>aps
This command configures a physical port that will act as the working circuit for this APS group.
The working circuit port must contain only the default configuration and cannot be part of another APS group. The working circuit must be created before the protection circuit.
When a port is a working circuit of an APS group, the configuration options available in the config>port port-id>sonet-sdh context are not allowed for that port unless they are in the following exception list:
clock-source
[no] loopback
[no] report-alarm
section-trace
[no] threshold
When a port is configured as a working circuit of an APS group, the configurations listed above and all service configurations related to the APS port are operationally inherited by the working circuit from the APS group ID. If the working circuit cannot inherit that configuration (for example, due to resource limitations), the configuration attempt fails and an error is returned to the user.
The working circuit must be shut down before it can be removed from an APS group. The inherited configuration for the circuit and APS operational commands for that circuit are not preserved when the circuit is removed from the APS group.
All configurations for the APS group under the config>port context and its submenus and all configuration for services that use this APS group ID are preserved as a non-activated configuration since the APS group no longer has any physical circuits assigned.
The no form of this command removes the working circuit. The working circuit can only be removed from the configuration after the protection circuit has been removed.
the physical port that will act as the working circuit for this APS group in the format slot/mda/port