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Table Of Contents
aps timer message max-interval
aps timer switchover-enable min-interval
APS Commands
APS (Automatic Protection Switching) provides protection against signal failure. Use the following commands to configure and monitor APS operations.
aps clear
To clear an external APS switchover request or an APS lockout request, use the aps clear command.
aps clear group-name
Syntax Description
Defaults
None
Command Modes
Privileged EXEC
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
The Cisco ONS 15540 ESP supports external APS switchover requests from the CLI (command-line interface). These requests have priorities depending on the condition of the working and protection signal, and whether another switchover or lockout request is in effect. There are three types of requests:
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The aps clear command clears the external requests on the APS group and returns the interfaces to the initial default state, with the working channel active and no active requests in effect. However, if the working channel is defective, the protection channel could become the active channel after the working channel fails and another switchover occurs.
The aps clear command differs from y-cable revertive switching behavior. Where the aps clear command returns the interfaces to the initial default state and clears the current external request, y-cable revertive switching behavior switches the active signal back to the working channel after the expiration of the wait-to-restore timer (if no external switchover request occur during that interval).
Examples
The following example shows how to clear an APS request on an associated interface pair named blue.
Switch#aps clear blueThe following example shows how to clear an APS request for an associated interface pair with the default group name.
Switch#aps clear Wavepatch2/0/0Related Commands
Prevents switchovers to the protection path.
Requests an APS switchover.
Displays APS configuration information and status.
aps direction
To specify unidirectional or bidirectional path switching, use the aps direction command. To revert to the default behavior, use the no form of this command.
aps direction {unidirectional | bidirectional}
no aps direction
Syntax Description
unidirectional
Specifies unidirectional path switching.
bidirectional
Specifies bidirectional path switching.
Defaults
Unidirectional
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
In unidirectional path switching, only the node that detects a signal failure switches over. The other node continues to receive its signal on the original path. In bidirectional path switching, when a node detects a signal failure it sends a message to the other node about the failure causing that node switches over. Both nodes then use the same path through the network.
Use the aps direction command only with splitter and y-cable line card protection configurations. Client line card protection handles switchovers in the client equipment, not in the Cisco ONS 15540 ESP.
When using bidirectional path switching, always configure the nodes so that they communicate over the same working path and the same protection path. Also, configure both nodes that support the channel with the same APS features, such as y-cable support, revertive behavior, and path switching.
Before changing the type of path switching, disable the standby interface with the shutdown command. After changing the type of path switching, reenable the standby interface with the no shutdown command
Note
Note
Examples
The following example shows how to configure bidirectional path switching for transparent interfaces in a y-cable protection configuration.
Switch#configure terminalSwitch(config)#redundancySwitch(config-red)#associate group alphaSwitch(config-red-aps)#working transparent 2/0/0Switch(config-red-aps)#protection transparent 4/0/0Switch(config-red-aps)#aps y-cableSwitch(config-red-aps)#aps direction bidirectionalSwitch(config-red-aps)#aps enableThe following example shows how to configure bidirectional path switching in a splitter
protection configuration.Switch#configure terminalSwitch(config)#redundancySwitch(config-red)#associate group chicagoSwitch(config-red-aps)#working wavepatch 10/2/0Switch(config-red-aps)#protection wavepatch 10/2/1Switch(config-red-aps)#aps direction bidirectionalSwitch(config-red-aps)#aps enableThe following example shows how to change the path switching operation for a y-cable APS group from unidirectional to bidirectional.
Switch# show aps group alphaAPS Group alpha :architecture.: 1+1, remote prov: 1+1span.........: end-to-end (client side y-cable)direction....: prov: uni, current: uni, remote prov: birevertive....: nocreated......: 14 hours, 53 minutesaps state....: associated (enabled)request timer: holddown: 5000 ms, max: 15000 ms, count 2switched chan: 0channel ( 0): Transparent4/3/0 (STANDBY - UP), Wave4/3 (UP): channel request: no-request: transmit request: no-request: receive request: no-requestchannel ( 1): Transparent2/3/0 (ACTIVE - UP), Wave2/3 (UP): channel request: no-request: switchover count: 0: last switchover: neverSwitch#configure terminalSwitch(config)#interface transparent 4/3/0Switch(config-if)#shutdownSwitch(config-if)#exitSwitch(config)# redundancySwitch(config-red)# associate group DenverSwitch(config-red-aps)# aps disableSwitch(config-red-aps)# aps direction bidirectionalSwitch(config-red-aps)# aps enableSwitch(config-red-aps)# exitSwitch(config-red)# exitSwitch(config)#interface transparent 4/3/0Switch(config-if)#no shutdownSwitch(config-if)#endSwitch#Related Commands
aps disable
To disable APS activity between an associated interface pair, use the aps disable command. To reenable APS activity, use the aps enable command.
aps disable
Syntax Description
This command has no other arguments or keywords.
Defaults
None
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Before changing the APS configuration of an associated interface pair, use this command to disable APS activity between the interfaces. When an interface pair is initially associated, APS activity is disabled.
Examples
The following example shows how to disable APS activity between associated transparent interfaces.
Switch#configure terminalSwitch(config)#redundancySwitch(config-red)#associate group newyork
Switch(config-red-aps)#aps disableRelated Commands
Enables APS activity between associated interfaces.
Creates an APS group and enters APS configuration mode.
aps enable
To enable APS activity between an associated interface pair, use the aps enable command. To disable APS activity, use the aps disable command.
aps enable
Syntax Description
This command has no other arguments or keywords.
Defaults
None
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
After changing the APS configuration of an associated interface pair, use this command to enable APS activity between the interfaces.
Examples
The following example shows how to enable APS activity between associated transparent interfaces.
Switch#configure terminalSwitch(config)#redundancySwitch(config-red)#associate group londonSwitch(config-red-aps)#aps working transparent 2/0/0Switch(config-red-aps)#aps protection transparent 4/0/0
Switch(config-red-aps)#aps enableRelated Commands
Disables APS activity between associated interfaces.
Creates an APS group and enters APS configuration mode.
aps far-end
To configure the remote node APS group name and IP address for a line card protected channel supported on a dual shelf node, use the aps far-end command. To remove remote node group name and IP address information, use the no form of this command.
aps far-end [group group-name] [ip-address address]
no aps far-end [group] [ip-address]
Syntax Description
Defaults
None
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Use this command to configure APS for line card protected channels supported on a dual shelf node.
The APS Channel Protocol uses the OSC to communicate between nodes. When a channel is supported on a dual shelf node, the other nodes in the topology do not have full OSC access in both the east and west directions. Without full OSC access to the channel, APS will no function correctly. To compensate for this, you must provide the APS group name and IP address of the other node that supports the channel.
Configure both shelves in the network that support the channel.
Examples
The following example shows how to configure the information for the remote node that supports the channel.
Switch(config)# redundancySwitch(config-red)# associate group tokyoSwitch(config-red-aps)# aps working transparent 3/0/0Switch(config-red-aps)# aps protection transparent 5/0/0Switch(config-red-aps)# aps far-end group blue ip-addr 10.1.1.2Switch(config-red-aps)# aps enableRelated Commands
aps lockout
To lock out an APS switchover to the protection path, thus preventing any further APS switchovers for any reason, including manual or forced switchovers and signal failures, use the aps lockout command. To remove an APS lockout request, use the aps clear command.
aps lockout group-name
Syntax Description
This command has no other arguments or keywords.
Defaults
Disabled
Command Modes
Privileged EXEC
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Use this command to configure APS signal switchover lockout on the protection path. This is useful when you want to prevent a switchover during shelf maintenance, or when the protection signal has degraded or failed.
You can only lock out switchovers to the protection path, not the working path. A lockout request only succeeds when the protection path interface is also acting as the standby interface. If the protection path interface is the active interface, use the aps switch command to switch the active interface role back to the working interface.
Note
Examples
The following example shows how to lock out switchover to the protection path on an associated group named group1.
Switch#aps lockout group1Related Commands
aps message-channel
To configure message channel to send APS channel protocol messages for the Cisco ONS 15540 ESP, use the aps message-channel command. To revert to the default behavior, use the no form of this command.
aps message-channel {auto-select [far-end group-name name] |
inband dcc [far-end group-name name] | ip far-end group-name name ip-address ip-address | osc [far-end group-name name]}no aps message-channel
Syntax Description
Defaults
auto-select
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Using OSC provided hop-by-hop support and easier fault isolation. The in-band message channel provides channel-based support without the overhead of the OSC. Using IP sends the message outside the optical network.
Examples
The following example shows how to create an APS group and configure the message channel:
Switch# configure terminalSwitch(config)# redundancySwitch(config-red)# associate group aps_group1Switch(config-red-aps)# aps message-channel oscRelated Commands
aps protection
To configure the protection path interface of an APS group, use the aps protection command. To remove to the protection path interface, use the no form of this command.
aps protection {transparent slot/subcard/port | wavepatch slot/subcard/port}
no aps protection {transparent slot/subcard/port | wavepatch slot/subcard/port}
Syntax Description
Defaults
None
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Each interface in an associated pair has a configured role to perform: one is the working interface and the other is the protection interface. However, at any given instant, the interfaces also have a current mode of operation: active and standby. The interface that is in active mode and receives the signal may or may not be the working interface. The working interface is the preferred interface to receive the active signal. The protection interface is the preferred interface for the standby signal.
When a pair of interfaces is associated for APS protection using the associate interface command, the interface with the higher interface number is the protection interface by default. To override this default configuration, use the aps protection command.
Examples
The following example shows how to create an APS group and configure an APS protection interface:
Switch#configure terminalSwitch(config)#redundancySwitch(config-red)#associate group denverSwitch(config-red-aps)#aps working transparent 2/0/0Switch(config-red-aps)#aps protection transparent 4/0/0Switch(config-red-aps)# aps enableRelated Commands
aps revertive
To configure revertive APS for y-cable line card protection, use the aps revertive command. To disable revertive APS, use the no form of this command.
aps revertive
no aps revertive
Syntax Description
This command has no other arguments or keywords.
Defaults
Disabled
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
When revertive APS is configured and a switchover to the protection signal has occurred, the system automatically switches back to the preferred working signal when it becomes operational. Use the aps timer wait-to-restore command to control how quickly the signal reverts back to the working path.
Note
Examples
The following example shows how to configure revertive APS on an associated transparent interface pair.
Switch#configure terminalSwitch(config)#redundancySwitch(config-red)#associate group dallasSwitch(config-red-aps)# aps working transparent 2/0/0Switch(config-red-aps)# aps protection transparent 4/0/0Switch(config-red-aps)#aps revertiveSwitch(config-red-aps)#aps y-cableSwitch(config-red-aps)#aps enableRelated Commands
aps switch
To request an APS switchover from the working path to the protection path, or from the protection path to the working path, use the aps switch command. To clear an APS switchover request, use the aps clear command.
aps switch group-name {force | manual} {protection-to-working | working-to-protection}
Syntax Description
Defaults
None
Command Modes
Privileged EXEC
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
The Cisco ONS 15540 ESP supports APS switchover requests from the CLI (command-line interface). These requests have priorities depending on the condition of the protection signal and the existence of other switchover requests. There are three types of requests:
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For y-cable protected configurations, the transponder modules monitor both the active and standby interfaces.
The APS priority scheme for y-cable protected configurations is the following:
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For splitter protected configurations, the transponder module cannot monitor the signal on the standby interface. Only the active signal is monitored. This limitation prevents APS switchovers due to signal degrade or signal failure when error thresholds are exceeded. Signal failure switchovers are only triggered by loss of light. Therefore, the APS priority scheme for splitter protected configurations differs slightly from y-cable protected configurations:
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Note
Examples
The following example shows how to make a manual switchover request from the working path to the protection path for an associated interface pair named blue.
Switch#aps switch blue manual working-to-protectionThe following example shows how to make a force switchover request from the working to the protection path for an associated interface pair with the default group name.
Switch#aps switch Wavepatch2/0/0 force protection-to-workingRelated Commands
aps timer message holddown
To modify the APS Channel Protocol holddown timer, use the aps timer message holddown command. To revert to the default values, use the no form of this command.
aps timer message holddown milliseconds [count number]
no aps timer message holddown
Syntax Description
Defaults
See the "Syntax Description" section.
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
The holddown timer prevents APS Channel Protocol message flooding over the OSC. The holddown message count allows a specified number of messages to exchange between the nodes before the holddown timer starts. For example, if the holddown message count is set to 2, the node sends and receives two messages before the timer starts. This allows the protocol to operate efficiently without affecting system performance.
Note
Examples
The following example shows how to modify the holddown timer and count values.
Switch(config)# redundancySwitch(config-red)# associate group denverSwitch(config-red-aps)# aps disableSwitch(config-red-aps)# aps timer message holddown 4000 count 4Switch(config-red-aps)# aps enableRelated Commands
aps timer message max-interval
To modify the maximum interval for the APS Channel Protocol inactivity timer, use the aps timer message max-interval command. To revert to the default value, use the no form of this command.
aps timer message max-interval seconds
no aps timer message max-interval
Syntax Description
seconds
Specifies the maximum number of seconds to wait before sending an APS Channel Protocol inactivity message. The range is 1 to 120 seconds.
Defaults
15 seconds
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
To ensure that the APS Channel Protocol is still functioning between the nodes, periodic messages are sent during periods of inactivity. The maximum interval of the inactivity timer determines how often to send the inactivity messages.
Note
Examples
The following example shows how to modify the maximum interval for the inactivity timer.
Switch(config)# redundancySwitch(config-red)# associate group dallasSwitch(config-red-aps)# aps disableSwitch(config-red-aps)# aps timer message max-interval 30Switch(config-red-aps)# aps enableRelated Commands
aps timer search-for-up
To modify the minimum and maximum timer intervals on an APS timer for the length of time the system waits for a splitter protected connection to come up when both connections are down, use the aps timer search-for-up command. To revert to the default values, use the no form of this command.
aps timer search-for-up min-interval max-interval
no aps timer search-for-up
Syntax Description
Defaults
Minimum interval: 2 seconds
Maximum interval: 32 seconds
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Use this command to modify the minimum and maximum timer intervals on an APS timer that causes the system to wait for a splitter protection connection to come up before checking the other splitter protection connection.
When both members of a splitter pair are down, the system first checks one signal for the minimum time interval. If the splitter protection connection does not come up, the system checks the other connection and doubles the time interval. This process repeats until the maximum timer interval is reached or exceeded. Checking continues at the maximum timer interval until one of the splitter protection connections becomes active.
Note
Examples
The following example shows how to modify the minimum and maximum timer intervals for how often the system switches to check the other splitter protection connection.
Switch(config)# redundancySwitch(config-red)# associate group newyorkSwitch(config-red-aps)# aps disableSwitch(config-red-aps)# aps timer search-for-up 4 16Switch(config-red-aps)# aps enableRelated Commands
aps timer switchover-enable min-interval
To modify the minimum time interval between successive APS switchovers in a splitter protected configuration, use the aps timer switchover-enable min-interval command. To revert to the default value, use the no form of this command.
aps timer switchover-enable min-interval seconds
no aps timer switchover-enable min-interval
Syntax Description
seconds
Specifies the minimum number of seconds between successive switchovers. The range is 1 to 120 seconds.
Defaults
3 seconds
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Use this command to modify the minimum time interval between successive APS switchovers. This prevents data loss from excessive switchovers caused by active interface failures.
Note
Note
Examples
The following example shows how to modify the minimum interval between successive signal switchovers.
Switch(config)# redundancySwitch(config-red)# associate group sanfranciscoSwitch(config-red-aps)# aps disableSwitch(config-red-aps)# aps timer switchover-enable min-interval 4Switch(config-red-aps)# aps enableRelated Commands
aps timer wait-to-restore
To modify the number of seconds on the APS wait-to-restore timer before reverting to the preferred working signal in a y-cable protection configuration, use the aps timer wait-to-restore command. To return to the default value, use the no form of this command.
aps timer wait-to-restore seconds
no aps timer wait-to-restore
Syntax Description
seconds
Specifies the number of seconds the system must wait before switching to the preferred working signal. The range is 0 to 720 seconds.
Defaults
300 seconds
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
This command prevents oscillations when revertive switching is configured for y-cable line card protection configurations. If the preferred working signal in a y-cable line card protection configuration is unstable, the wait-to-restore timer prevents possible data loss that could result from frequent switchovers.
Caution
Note
Note
Examples
The following example shows how to modify the APS wait-to-restore timer.
Switch#configure terminalSwitch(config)#redundancySwitch(config-red)#associate group newyorkSwitch(config-red-aps)# aps disableSwitch(config-red-aps)#aps timer wait-to-restore 180Switch(config-red-aps)# aps enableRelated Commands
aps working
To configure the working interface of an APS group, use the aps working command. To remove the working interface, use the no form of this command.
aps working {transparent slot/subcard/port | wavepatch slot/subcard/port}
no aps working {transparent slot/subcard/port | wavepatch slot/subcard/port}
Syntax Description
Defaults
None
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Each interface in an associated pair has a configured role to perform: one is the working interface and the other is the protection interface. However, at any given instant, the interfaces also have a current mode of operation: active and standby. The interface that is in active mode, and is receiving the signal, may or may not be the working interface. The working interface is the preferred interface to receive the active signal. The protection interface is the preferred interface for the standby signal.
This command persists across system reloads.
When a pair of interfaces is associated for APS protection, the interface with the lower interface number is the working interface by default. To override this default configuration, use the aps working command. If there is an aps lockout command in effect on the protection interface, it cannot become the working interface.
Examples
The following example shows how to configure a working interface on an existing APS group:
Switch#configure terminalSwitch(config)#redundancySwitch(config-red)#associate group denverSwitch(config-red-aps)# aps disableSwitch(config-red-aps)#aps working transparent 4/0/0Switch(config-red-aps)#aps protection transparent 2/0/0Switch(config-red-aps)# aps enableRelated Commands
aps y-cable
To configure y-cable line card protection, use the aps y-cable command. To disable y-cable line card protection, use the no form of this command.
aps y-cable
no aps y-cable
Syntax Description
This command has no other arguments or keywords.
Defaults
Disabled
Command Modes
APS configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Use this command to ensure that only one interface of an associated transparent interface pair transmits to the client. Signal corruption occurs when both interfaces in the pair transmit to the client over the y-cable.
Caution
Examples
The following example shows how to configure y-cable line card protection.
Switch(config)# redundancySwitch(config-red)# associate group seattleSwitch(config-red-aps)# aps disableSwitch(config-red-aps)# aps y-cableSwitch(config-red-aps)# aps enableRelated Commands
associate group
To enter APS configuration subcommand mode and to associate interfaces for APS protection, or to modify the attributes of an existing APS group, use the associate group command. To remove the group, use the no form of this command.
aps group group-name
no aps group group-name
Syntax Description
group-name
Specifies a group name for the interface pair. Group names are case sensitive and cannot have embedded blanks.
Defaults
None
Command Modes
Redundancy configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Use this command to create an APS group, or specify an existing group, and enter APS configuration mode. You can specify group names created with this command or with the associate interface command.
Examples
The following example shows how to select an APS group and enter APS configuration mode.
Switch#configure terminalSwitch#(config)#redundancySwitch#(config-red)#associate group blueSwitch#(config-red-aps)#Related Commands
associate interface
To associate the wavepatch interface pairs in a slot, or in the entire shelf, for APS splitter protection using one command, use the associate interface command. To disable APS protection for the interfaces, use the no form of this command.
associate interface wavepatch */*/working-port wavepatch */*/protection-port [enable | disable]
associate interface wavepatch slot/*/working-port wavepatch slot/*/protection-port [enable | disable]
no associate interface wavepatch */*/working-port wavepatch */*/protection-port
no associate interface wavepatch slot/*/working-port wavepatch slot/*/protection-port
Syntax Description
Defaults
The default working interface for each of the interface pairs is the first interface in the command.
APS activity between the interfaces is disabled when the interface pairs are first associated.
The default group name for each of the interface pairs is the lower interface number.
Command Modes
Redundancy configuration
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Use this command to associate the interfaces for APS protection, and then enter APS configuration mode, or to change the configuration of associated pairs. Also use this command to change the association of one interface to another interface.
When associating wavepatch interfaces with wildcards, the command mode does not enter APS configuration mode as it does when associating a pair of interfaces. Changes to the default APS attribute values must be entered for interface pairs individually. See the " Examples" section.
Associating wavepatch interfaces with wildcards does not overwrite attributes configured for a specific interface pair. For example, if you configure attributes for interface pair wavepatch 3/0/0 and wavepatch 3/0/1 with the associate group command, a subsequent associate interface wavepatch 3/*/0 wavepatch 3/*/1 command does not change the attributes for the specific interface pair.
When a pair of interfaces is associated for APS protection with the associate interface command, the interface entered first in the command is the working interface by default.
Interfaces can be associated without being physically present in the shelf.
Examples
The following example shows how to associate all the wavepatch interfaces in the shelf for splitter protection while leaving APS activity between the interfaces disabled.
Switch#configure terminalSwitch(config)# redundancySwitch(config-red)# associate interface wavepatch */*/0 wavepatch */*/1Switch(config-red)#The following example shows how to associate all the wavepatch interfaces in slot 2 for splitter protection, while enabling APS activity between the interfaces.
Switch#configure terminalSwitch(config)# redundancySwitch(config-red)# associate interface wavepatch 2/*/0 wavepatch 2/*/1 enableSwitch(config-red)#Related Commands
show aps
To display APS configuration and status information for the system, use the show aps command.
show aps [detail | group name | interface interface]
Syntax Description
detail
Displays detailed APS information for all APS groups.
interface interface
Displays detailed APS information for an interface.
group name
Displays detailed APS information for an APS group.
Defaults
Displays summary APS information
Command Modes
EXEC and privileged EXEC
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
Use this command to display APS information for an interface, an APS group, or the entire shelf.
At least one interface in an associated pair must be present on the system to use the show aps interface command. Otherwise, use the show aps detail command or the show aps group command to display APS information for the associated interface pair.
Note
Examples
The following example shows how to display detailed APS information for all APS groups. (See Table 1-1 for field descriptions.)
Switch# show aps detailAPS Group blue:architecture.: 1+1, remote prov: 1+1span.........: end-to-end (client side y-cable)direction....: prov: uni, current: uni, remote prov: unirevertive....: yes, wtr: 60 secs (not running)created......: 4 minutesaps state....: associated (enabled)request timer: holddown: 5000 ms, max: 15000 secs, count 2switched chan: 0channel ( 0): Transparent5/0/0 (STANDBY - UP), Wave5/0 (UP): channel request: no-request: transmit request: no-request: receive request: no-requestchannel ( 1): Transparent3/0/0 (ACTIVE - UP), Wave3/0 (UP): channel request: no-request: switchover count: 0: last switchover: never
The following example shows how to display APS information for an APS group with the default group name (the default working interface). (See Table 1-1 for field descriptions.)
Switch# show aps group Wavepatch8/0/0APS Group Wavepatch8/0/0 :architecture.: 1+1, remote prov: 1+1span.........: end-to-end (network side splitter)direction....: prov: bi, current: bi, remote prov: birevertive....: nocreated......: 3 hours, 6 minutesaps state....: associated (enabled)request timer: holddown: 5000 ms, max: 15000 ms, count 2search-up int: min: 2 secs, max: 32 secsswitched chan: 0channel ( 0): Wavepatch8/0/1 (STANDBY - UP): channel request: no-request: transmit request: no-request: receive request: no-requestchannel ( 1): Wavepatch8/0/0 (ACTIVE - UP): channel request: no-request: switchover count: 1: last switchover: 1 hour, 0 minutesThe following example shows how to display APS information for a wavepatch interface. (See Table 1-1 for field descriptions.)
Switch# show aps interface transparent 8/0/0APS Group blue :architecture.: 1+1, remote prov: 1+1span.........: end-to-end (client side y-cable)direction....: prov: uni, current: uni, remote prov: unirevertive....: nocreated......: 1 minuteaps state....: associated (enabled)request timer: holddown: 5000 ms, max: 15000 ms, count 2switched chan: 0channel ( 0): Transparent10/0/0 (STANDBY - UP): external request: no-request: transmit request: no-request: receive request: no-requestchannel ( 1): Transparent8/0/0 (STANDBY - UP): external request: no-request: switchover count: 0: last switchover.: neverThe following example shows how to display APS summary information. (See Table 1-2 for field descriptions.)
Switch# show apsAR :APS Role, Wk:Working, Pr:ProtectionAS :APS State, Ac:Active, St:StandbyIS :Interface State, Up:Up, Dn:DownMPL:Minimum Protection Level, SD:Signal Degrade, SF:Signal FailureLOL:Loss of Light, - not currently protectedInterface AR AS IS MPL Redundant Intf Group Name~~~~~~~~~~~~~~~~~ ~~ ~~ ~~ ~~~ ~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~Wavepatch3/1/0 Wk Ac Up LOL Wavepatch3/1/1 Wavepatch3/1/0Wavepatch3/1/1 Pr St Up LOL Wavepatch3/1/0 Wavepatch3/1/0
Table 1-2 show aps summary Field Descriptions
Interface
Shows the name of the interface.
AR (APS Role)
Shows the configured role for the interface, either Wk (working) or Pr (protection). Working and protection are preferred roles configured by the associate interface command and the associate group command.
AS (APS State)
Shows the APS state, either Ac (active) or St (standby). The interface currently chosen by the system to receive the channel signal is the active interface; the other interface in the associated pair is the standby.
IS (Interface State)
Shows the interface state, either Up (up) or Dn (down).
MPL (Minimum Protection Level)
Shows the minimum protection level for signal switchover. Valid values are:
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Redundant Intf (Interface)
Shows the other interface in the APS group.
Group Name
Shows the APS group name for the interface.
Related Commands
show aps trace
To display APS and APS Channel Protocol activity information in the system memory, use the show aps trace command.
show aps trace [clear | stop | resume]
Syntax Description
clear
Clears the APS activity trace table in memory.
stop
Stops the collection of APS activity information.
resume
Resumes the collection of APS activity information.
Defaults
Displays APS and APS Channel Protocol activity information.
Trace is active.
Command Modes
EXEC and privileged EXEC
Command History
This table includes the following release-specific history entries:
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Usage Guidelines
APS trace information is similar to show aps command output except that it is stored in processor memory. The trace buffer contains activity information for APS and for the APS Channel Protocol.
The trace collection status and information are not saved across system or processor card reloads. After the reload, the trace status returns to the default active state and the trace buffer in memory is cleared.
Examples
The following example shows how to clear the APS trace buffer:
Switch# show aps trace clearThe following example shows how to stop the APS trace activity information collection:
Switch# show aps trace stopThe following example shows how to resume the APS trace activity information collection:
Switch# show aps trace resumeThe following example shows how to display detailed APS information for all APS groups. (See Table 1-3 for field descriptions.)
Switch# show aps traceAPS: Wavepatch10/0/0: searchup timer expiredAPS: Wave10/0: wave state WAVE_DOWNAPS: wp event SEARCHUP_EXP: wv state WAVE_DOWNAPS: switch optk swpos to 1APS: restart searchup timer: check after 32 secACP: Wavepatch10/0/0: service request timerACP: Wavepatch10/0/0: xmit request failed: protection oscp idb missingACP: Transparent10/0/0: service request timerACP: Transparent10/0/0: xmit request failed: neither y-cable nor splitterACP: Wavepatch10/0/0: service request timerACP: Wavepatch10/0/0: xmit request failed: protection oscp idb missingACP: Transparent10/0/0: service request timerACP: Transparent10/0/0: xmit request failed: neither y-cable nor splitterAPS: Wavepatch10/0/0: searchup timer expiredAPS: Wave10/0: wave state WAVE_DOWNAPS: wp event SEARCHUP_EXP: wv state WAVE_DOWNAPS: switch optk swpos to 0APS: restart searchup timer: check after 32 secACP: Transparent10/0/0: service request timerACP: Transparent10/0/0: xmit request failed: neither y-cable nor splitter
Table 1-3 show aps trace Field Descriptions
APS
Specifies APS activity.
ACP
Specifies APS Channel Protocol activity.
Related Commands
Associates two interfaces for APS protection.
Enables debugging of APS and APS Channel Protocol.
Shows APS configuration and status information.
Posted: Sun Feb 19 15:11:00 PST 2006
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