Table Of Contents

Cisco MWR 1941-DC Router IP-RAN Command Reference

clear ip rtp header-compression

clear ppp mux

keepalive

ip rtp compression-connections

ip rtp header-compression

mode y-cable

ppp mux

ppp mux delay

ppp mux frame

ppp mux pid

ppp mux subframe length

ppp mux subframe count

redundancy

show ip rtp header-compression

show ppp mux

show redundancy

standalone

standby use-interface

Cisco MWR 1941-DC Router IP-RAN Command Reference

---

This chapter contains information about commands that were introduced specifically in support of implementing the Cisco MWR 1941-DC router in an IP-RAN:

The following commands have been added or changed:

•clear ppp mux

•mode y-cable

•ip rtp compression-connections

•ip rtp header-compression

•ppp mux

•ppp mux delay

•ppp mux frame

•ppp mux pid

•ppp mux subframe length

•ppp mux subframe count

•redundancy

•show ppp mux

•show redundancy

•standalone

•standby use-interface

The following commands were not altered but have been included for your convenience:

•clear ip rtp header-compression

•keepalive

•show ip rtp header-compression

clear ip rtp header-compression

To clear Real-Time Transport Protocol (RTP) header compression structures and statistics, use the clear ip rtp header-compression EXEC command.

clear ip rtp header-compression [interface-type interface-number]

Syntax Description

type number

(Optional) Interface type and number.

Command Modes

EXEC

Command History

Release	Modification
11.3	This command was introduced.
12.2(8)MC2	This command was incorporated in Cisco IOS 12.2(8)MC2.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

If this command is used without an interface type and number, it clears all RTP header compression structures and statistics.

Examples

The following example clears RTP header compression structures and statistics for multilink interface 1:

clear ip rtp header-compression multilink1

Related Commands

Command	Description
ip rtp header-compression	Enables RTP header compression.

clear ppp mux

To clear PPP mux statistics, use the clear ppp mux EXEC command.

clear ppp mux [interface interface]

Syntax Description

interface

(Optional) The identifier of the multilink or serial interface for which you want to clear counters.

Defaults

If no interface is specified, statistics for all multilink and serial interfaces are cleared.

Command Modes

EXEC

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

None

Examples

The following example clears PPP mux statistics for multilink interface 1:

clear ppp mux interface multilink1

Related Commands

Command	Description
show ppp mux	Displays PPP mux counters for the specified multilink interface.

keepalive

To enable keepalive packets and to specify the number of times that the Cisco IOS software tries to send keepalive packets without a response before bringing down the interface or before bringing the tunnel protocol down for a specific interface, use the keepalive command in interface configuration mode. When the keepalive function is enabled, a keepalive packet is sent at the specified time interval to keep the interface active. To turn off keepalive packets entirely, use the no form of this command.

keepalive [period [retries]]

no keepalive [period [retries]]

Syntax Description

period

(Optional) Integer value in seconds greater than 0. The default is 10.

retries

(Optional) Specifies the number of times that the device will continue to send keepalive packets without response before bringing the interface down. Integer value greater than 1 and less than 255. If omitted, the value that was previously set is used; if no value was specified previously, the default of 5 is used. If using this command with a tunnel interface, specifies the number of times that the device will continue to send keepalive packets without response before bringing the tunnel interface protocol down.

Defaults

period: 10 seconds

retries: 5

If you enter only the keepalive command with no arguments, defaults for both arguments are used.

If you enter only the keepalive command and the timeout (period) parameter, the default number of retries (5) is used.

If you enter the no keepalive command, keepalive packets are disabled on the interface.

Command Modes

Interface configuration

Command History

Release	Modification
10.0	This command was introduced.
12.2(8)T	The retries argument was added and made available on tunnel interfaces.
12.2(13)	The default value for the retries argument was increased to 5.
12.2(8)MC2	This command was incorporated in Cisco IOS 12.2(8)MC2.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

Keepalive Time Interval

You can configure the keepalive time interval, which is the frequency at which the Cisco IOS software sends messages to itself (Ethernet and Token Ring) or to the other end (serial and tunnel), to ensure that a network interface is alive. The interval is adjustable in 1-second increments down to 1 second. An interface is declared down after three update intervals have passed without receiving a keepalive packet unless the retry value is set higher.

Setting the keepalive timer to a low value is very useful for rapidly detecting Ethernet interface failures (transceiver cable disconnecting, cable not terminated, and so on).

Line Failure

A typical serial line failure involves losing Carrier Detect (CD) signal. Because this sort of failure is typically noticed within a few milliseconds, adjusting the keepalive timer for quicker routing recovery is generally not useful.

Keepalive Packets with Tunnel Interfaces

GRE keepalive packets may be sent from both sides of a tunnel, or from just one side. If they are sent from both sides, the period and retry parameters can be different at each side of the link. If you configure keepalives on only one side of the tunnel, the tunnel interface on the sending side might perceive the tunnel interface on the receiving side to be down because the sending interface is not receiving keepalives. From the receiving side of the tunnel, the link appears normal because no keepalives were enabled on the second side of the link.

Dropped Packets

Keepalive packets are treated as ordinary packets, so it is possible that they will be dropped. To reduce the chance that dropped keepalive packets will cause the tunnel interface to be taken down, increase the number of retries.

---

Note When adjusting the keepalive timer for a very low bandwidth serial interface, large datagrams can delay the smaller keepalive packets long enough to cause the line protocol to go down. You may need to experiment to determine the best values to use for the timeout and the number of retry attempts.

---

Examples

The following example shows how to set the keepalive interval to 3 seconds:

Router(config)# interface ethernet 0

Router(config-if)# keepalive 3 

The following example shows how to set the keepalive interval to 3 seconds and the retry value to 7:

Router(config)# interface tunnel 1

Router(config-if)# keepalive 3 7 

ip rtp compression-connections

To specify the total number of Real-Time Transport Protocol (RTP) header compression connections that can exist on an interface, use the ip rtp compression-connections interface configuration command. To restore the default value, use the no form of this command.

ip rtp compression-connections number

no ip rtp compression-connections

Syntax Description

number

Number of RTP header compression connections the cache supports, in the range from 3 to 1800. The default is 16 connections.

Defaults

16 connections

Command Modes

Interface configuration

Command History

Release	Modification
11.3	This command was introduced.
12.0(7)T	For PPP and High-Level Data Link Control (HDLC) encapsulation, the maximum number of connections increased from 256 to 1000. For Frame Relay encapsulation, the maximum number of connections increased to 256. The maximum value for Frame Relay is fixed, not configurable.
12.1(4)E	This command was supported on Cisco 7100 series routers.
12.2(8)MC2	The upper limit for the MWR 1941-DC is set at 1000.
12.2(14)S	This command was integrated into Cisco IOS Release 12.2(14)S.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.
12.2(15)MC2h	The upper limit for MWR 1941-DC is set at 1800.

Examples

The following example changes the number of RTP header compression connections supported to 150:

interface serial 0

 encapsulation ppp

 ip rtp header-compression ignore-id

 ip rtp compression-connections 150

Related Commands

Command	Description
ip rtp header-compression	Enables RTP header compression.
show ip rtp header-compression	Displays RTP header compression statistics.

ip rtp header-compression

To enable Real-Time Transport Protocol (RTP) header compression, use the ip rtp header-compression interface configuration command. To disable RTP header compression, use the no form of this command.

ip rtp header-compression [passive] [ignore-id]

no ip rtp header-compression

Syntax Description

passive	(Optional) Compresses outgoing RTP packets only if incoming RTP packets on the same interface are compressed. This option is not applicable on PPP links.
ignore-id	(Optional) Suppresses the IP ID checking in RTP/UDP header compression.

Defaults

Disabled

Command Modes

Interface configuration

Command History

Release	Modification
11.3	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS Release 12(15)MC1 and the ignore-id keyword option was added.
12.3(11)T	This command was incorporated in Cisco IOS Release 12.3(11)T.

Usage Guidelines

If you use this command without the passive keyword, the software compresses all RTP traffic.

You can compress IP/UDP/RTP headers and IP/UDP headers to reduce the size of your packets. Compressing headers is especially useful for RTP, because RTP payload size can be as small as 20 bytes, and the decompressed header is 40 bytes.

RTP header compression is supported on serial lines using PPP encapsulation. You must enable compression on both ends of a serial connection.

Examples

The following example enables RTP header compression on fast ethernet interface 1 and limits the number of RTP header compression connections to 10:

interface serial 0

 encapsulation ppp

 ip rtp header-compression

 ip rtp compression-connections 10

Related Commands

Command	Description
clear ip rtp header-compression	Clears RTP header compression structures and statistics.
ip rtp compression-connections	Specifies the total number of RTP header compression connections that can exist on an interface.
show ip rtp header-compression	Displays RTP header compression statistics.

mode y-cable

To access the command mode that allows you to manually control the relays on the VWIC card, use the mode y-cable command.

mode y-cable

Syntax Description

This command has no parameters, it invokes the y-cable mode.

Defaults

There are no default settings or behaviors.

Command Modes

Redundancy configuration

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Examples

The following example enables y-cable mode.

mode y-cable

Related Commands

Command	Description
standalone	Indicates whether the MWR 1941-DC router is being used as a standalone device and manually sets the relays.
standby use-interface	Designates a loopback interface as a health or revertive interface.
redundancy	Invokes redundancy mode.

ppp mux

To enable PPP multiplexing/demultiplexing, use the ppp mux command in interface configuration mode. To disable PPP multiplexing/demultiplexing, use the no form of this command.

ppp mux

no ppp mux

Syntax Description

This command has no parameters.

Defaults

PPP multiplexing/demultiplexing is disabled by default.

Command Modes

Interface configuration

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Examples

The following example enables PPP multiplexing/demultiplexing.

ppp mux

Related Commands

Command	Description
ppp mux delay	Sets the maximum delay.
ppp mux frame	Sets the maximum length of the PPP superframe.
ppp mux pid	Sets the default PPP protocol ID.
ppp mux subframe count	Sets the maximum number of subframes in a superframe.
ppp mux subframe length	Sets the maximum length of the PPP subframe.
show ppp mux	Displays PPP mux counters for the specified multilink interface.

ppp mux delay

To set the maximum time the processor can wait before sending a superframe, use the ppp mux delay command in interface configuration mode. To set the maximum delay to the default, use the no form of this command.

ppp mux delay integer

no ppp mux delay

Syntax Description

integer

The maximum number of microseconds that the processor can wait before sending out a PPP superframe. Possible values are 0 through 4000000 microseconds.

Defaults

The default maximum delay is 0, which indicates that a superframe will be sent when the transmit queue is full.

Command Modes

Interface configuration

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

To use this command, you must first enable PPP multiplexing/demultiplexing.

Examples

The following example sets the maximum delay to 5 microseconds.

ppp mux delay 5

Related Commands

Command	Description
ppp mux	Enables PPP multiplexing/demultiplexing
ppp mux frame	Sets the maximum length of the PPP superframe.
ppp mux pid	Sets the default PPP protocol ID.
ppp mux subframe count	Sets the maximum number of subframes in a superframe.
ppp mux subframe length	Sets the maximum length of the PPP subframe.
show ppp mux	Displays PPP mux counters for the specified multilink interface.

ppp mux frame

To set the maximum length (in bytes) of the PPP superframes, use the ppp mux frame command in interface configuration mode. To set the maximum length to the default, use the no form of this command.

ppp mux frame integer

no ppp mux frame

Syntax Description

integer

The maximum number of bytes in any multiplexed PPP superframe. Possible values are 1 through 512 bytes.

Defaults

The default maximum length is 197.

Command Modes

Interface configuration

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

To use this command, you must first enable PPP multiplexing/demultiplexing.

Examples

The following example sets the maximum superframe length to 80 bytes.

ppp mux frame 80

Related Commands

Command	Description
ppp mux	Enables PPP multiplexing/demultiplexing
ppp mux delay	Sets the maximum delay.
ppp mux pid	Sets the default PPP protocol ID.
ppp mux subframe count	Sets the maximum number of subframes in a superframe.
ppp mux subframe length	Sets the maximum length of the PPP subframe.
show ppp mux	Displays PPP mux counters for the specified multilink interface.

ppp mux pid

To set the default receiving PPP protocol ID, use the ppp mux pid command in interface configuration mode. To remove this configuration, use the no form of this command.

ppp mux pid integer

no ppp mux pid

Syntax Description

integer

The default value of the PPP protocol ID. Possible values are 0 through 65534.

Defaults

The default is 33 (0x21), which is the IP protocol.

Command Modes

Interface configuration

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

To use this command, you must first enable PPP multiplexing/demultiplexing.

Examples

The following example sets the default PPP protocol ID to 8.

ppp mux pid 8

Related Commands

Command	Description
ppp mux	Enables PPP multiplexing/demultiplexing
ppp mux delay	Sets the maximum delay.
ppp mux frame	Sets the maximum length of the PPP superframe.
ppp mux subframe count	Sets the maximum number of subframes in a superframe.
ppp mux subframe length	Sets the maximum length of the PPP subframe.
show ppp mux	Displays PPP mux counters for the specified multilink interface.

ppp mux subframe length

To set the maximum length (in bytes) of the PPP subframes, use the ppp mux subframe length command in interface configuration mode. To set the maximum length to the default, use the no form of this command.

ppp mux subframe length integer

no ppp mux subframe length

Syntax Description

integer

The maximum number of bytes in any single subframe that is to be multiplexed. Possible values are 1 through 512 bytes.

Defaults

The default maximum length is 195.

Command Modes

Interface configuration

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

To use this command, you must first enable PPP multiplexing/demultiplexing. The maximum length of the subframe should be the maximum length of the superframe minus the length of the L2 header.

Examples

The following example sets the maximum subframe length to 20 bytes.

ppp mux subframe length 20

Related Commands

Command	Description
ppp mux	Enables PPP multiplexing/demultiplexing
ppp mux delay	Sets the maximum delay.
ppp mux frame	Sets the maximum length of the PPP superframe.
ppp mux pid	Sets the default PPP protocol ID.
ppp mux subframe count	Sets the maximum number of subframes in a superframe.
show ppp mux	Displays PPP mux counters for the specified multilink interface.

ppp mux subframe count

To set the maximum number of PPP subframes that can be contained in a superframe, use the ppp mux subframe count command in interface configuration mode. To set the maximum number to the default, use the no form of this command.

ppp mux subframe count integer

no ppp mux subframe count

Syntax Description

integer

The maximum number of subframes that can be contained in a superframe. Possible values are 1 through 15 bytes.

Defaults

The default maximum is 15.

Command Modes

Interface configuration

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

To use this command, you must first enable PPP multiplexing/demultiplexing.

Examples

The following example sets the maximum subframe count to 20 bytes.

ppp mux subframe count 20

Related Commands

Command	Description
ppp mux	Enables PPP multiplexing/demultiplexing
ppp mux delay	Sets the maximum delay.
ppp mux frame	Sets the maximum length of the PPP superframe.
ppp mux pid	Sets the default PPP protocol ID.
ppp mux subframe length	Sets the maximum length of the PPP subframe.
show ppp mux	Displays PPP mux counters for the specified multilink interface.

redundancy

To access the command mode that allows you to configure aspects of redundancy, use the redundancy command.

redundancy

Syntax Description

This command has no parameters, it invokes the redundancy mode.

Defaults

There are no default settings or behaviors.

Command Modes

Global configuration

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Examples

The following example enables redundancy mode.

redundancy

Related Commands

Command	Description
mode y-cable	Invoked y-cable mode.
standalone	Indicates whether the MWR 1941-DC router is being used as a standalone device and manually sets the relays.
standby use-interface	Designates a loopback interface as a health or revertive interface.

show ip rtp header-compression

To show RTP header compression statistics, use the show ip rtp header-compression EXEC command.

show ip rtp header-compression [type number] [detail]

Syntax Description

type number	(Optional) Interface type and number.
detail	(Optional) Displays details of each connection. Note This keyword is not supported on the Cisco MWR 1941-DC.

Command Modes

EXEC

Command History

Release	Modification
11.3	This command was introduced.
12.1(5)T	The command output was modified to include information related to the Distributed Compressed Real-Time Transport Protocol (dCRTP) feature.
12.2(8)MC2	This command was incorporated in Cisco IOS Release 12.2(8)MC2.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

The detail keyword is not available with the show ip rtp header-compression command on a Route Switch Processor (RSP). However, the detail keyword is available with the show ip rtp header-compression command on a Versatile Interface Processor (VIP). Enter the show ip rtp header-compression type number detail command on a VIP to retrieve detailed information regarding RTP header compression on a specific interface.

Examples

The following is sample output from the show ip rtp header-compression command:

show ip rtp header-compression

RTP/UDP/IP header compression statistics:

 Interface Serial1:

  Rcvd: 0 total, 0 compressed, 0 errors

     0 dropped, 0 buffer copies, 0 buffer failures

  Sent: 430 total 429 compressed

     15122 bytes saved, 0 bytes sent

     0 efficiency improvement factor

  Connect: 16 rx slots, 16 tx slots, 0 long searches, 1 misses

     99% hit ratio, five minute miss rate 0 misses/sec, 0 max.

Table 5-1 describes the significant fields shown in the display.

Table 5-1 show ip rtp header-compression Field Descriptions 

Field	Description
Interface Serial1	Type and number of interface.
Rcvd: total	Number of packets received on the interface.
compressed	Number of packets with compressed header.
errors	Number of errors.
dropped	Number of dropped packets.
buffer copies	Not applicable to the MWR 1941-DC router.
buffer failures	Not applicable to the MWR 1941-DC router.
Sent: total	Total number of packets sent.
compressed	Number of packets sent with compressed header.
bytes saved	Total savings in bytes due to compression.
bytes sent	Not applicable to the MWR 1941-DC router.
efficiency improvement factor	Efficiency achieved through compression.
Connect: rx slots	Total number of receive slots.
tx slots	Total number of transmit slots.
long searches	Not applicable to the MWR 1941-DC router.
misses	Number of new states that were created.
hit ratio	Number of times existing states were revised.
five minute miss rate	Average miss rate.
max.	Maximum miss rate.
negative cache	Not applicable to the MWR 1941-DC router.

Related Commands

Command	Description
ip rtp compression-connections	Specifies the total number of RTP header compression connections that can exist on an interface.
ip rtp header-compression	Enables RTP header compression.

show ppp mux

To display counters for a multilink interface on the MWR 1941-DC, use the show ppp mux command in EXEC mode.

show ppp mux [interface interface]

Syntax Description

interface interface

(Optional) The identifier of the multilink or serial interface for which you want to view counters.

Defaults

If no interface is specified, statistics for all multilink and serial interfaces are displayed.

Command Modes

EXEC

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

This command is only valid when issued against multilink or PPP interfaces.

Examples

The following is an example of the output generated by this command.

show ppp mux interface multilink 1

PPP Multiplex Statistics on Interface Multilink1:

Multiplex:

 Total input packets:0

 Errored input packets:0

 Valid input bytes:0

 Total output packets:0

 Multiplexed output packets:0

 Output bytes:0

 Efficiency improvement factor:0%

Demultiplex:

 Total input packets:0

 Multiplexed input packets:0

 Errored input packets:0

 Valid input bytes:0

 Total output packets:0

 Output bytes:0

 Efficiency improvement factor:0%

Table 5-2 describes the significant fields shown in the display.

Table 5-2 show ppp mux Field Descriptions

Field	Description
Total output packets	Number of outbound packets
Multiplexed output packets	Number of outbound multiplexed superframes
Output byte count	Number of outbound bytes
Total input packets	Number of inbound packets
Errored input packets	Number of inbound packets discarded due to error
Efficiency improvement factor	Percentage of efficiency improvement achieved through multiplexing or demultiplexing

The efficiency improvement factor is calculated as follows:

Multiplex efficiency improvement factor = 100 * (Total bytes saved) / (Total bytes received)

Where total bytes saved = bytes_received_at_muxer - bytes_sent_at_muxer.

Demultiplex efficiency improvement factor = 100 * (Total bytes saved) / (Total bytes sent)

Where total bytes saved = bytes_sent_at_demuxer - bytes_received_at_demuxer.

Related Commands

Command	Description
ppp mux	Enables PPP multiplexing/demultiplexing

show redundancy

To display information about the current redundant configuration and recent changes in states, use the show redundancy command in EXEC mode.

show redundancy

Syntax Description

This command has no attributes.

Command Modes

EXEC

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

In the standby group name group-name command, if you omit the group-name or if you enter a group name that doesn't begin with one or two, the configuration will fail and there will be a mismatch in the information displayed by the show redundancy and show standby commands.

Examples

The following is an example of the output generated by this command.

show redundancy

MWR1900 is the Active Router 

Previous States with most recent at bottom 

 INITL_INITL     Dec 31 19:00:00.000 

 LISTN_INITL     Feb 28 19:00:15.568 

 LISTN_LISTN     Feb 28 19:00:15.568 

 SPEAK_LISTN     Feb 28 19:00:18.568 

 SPEAK_SPEAK     Feb 28 19:00:18.568 

 STDBY_SPEAK     Mar 19 08:54:26.191 

 ACTIV_SPEAK     Mar 19 08:54:26.191 

 ACTIV_STDBY     Mar 19 08:54:26.191 

 ACTIV_ACTIV     Mar 19 08:54:26.191 

 INITL_ACTIV     Mar 19 08:56:22.700 

 INITL_INITL     Mar 19 08:56:22.700 

 INITL_LISTN     Mar 19 08:56:28.544 

 LISTN_LISTN     Mar 19 08:56:28.652 

 LISTN_SPEAK     Mar 19 08:56:31.544 

 SPEAK_SPEAK     Mar 19 08:56:31.652 

 SPEAK_STDBY     Mar 19 08:56:34.544 

 SPEAK_ACTIV     Mar 19 08:56:34.544 

 STDBY_ACTIV     Mar 19 08:56:34.652 

 ACTIV_ACTIV     Mar 19 08:56:34.652 

 INITL_ACTIV     Mar 19 10:20:41.455 

 INITL_INITL     Mar 19 10:20:41.455 

 INITL_LISTN     Mar 19 10:20:49.243 

 LISTN_LISTN     Mar 19 10:20:49.299 

 LISTN_SPEAK     Mar 19 10:20:52.244 

 SPEAK_SPEAK     Mar 19 10:20:52.300 

 SPEAK_STDBY     Mar 19 10:20:55.244 

 STDBY_STDBY     Mar 19 10:20:55.300 

 ACTIV_STDBY     Mar 19 10:21:01.692 

 ACTIV_ACTIV     Mar 19 10:21:01.692 

Related Commands

Command	Description
mode y-cable	Invokes y-cable mode.
redundancy	Invokes redundancy mode.
standalone	Specifies whether the MWR 1941-DC router is used in a redundant or stand-alone configuration.
standby	Sets HSRP attributes
standby use-interface	Specifies the interfaces to be used for health and revertive interfaces.

standalone

To specify that the MWR 1941-DC is being used in a stand-alone configuration (which impacts the relays on the VWIC), use the standalone command. To use the MWR 1941-DC in a redundant configuration, use the no form of this command.

[no] standalone

Syntax Description

This command has no attributes.

Defaults

By default, the MWR 1941-DC is configured to be used in a redundant configuration (no standalone) and the relays are open.

Command Modes

Y-cable configuration

Command History

Release	Modification
12.2(8)MC2	This command was introduced.
12.2(15)MC1	This command was incorporated in Cisco IOS 12.2(15)MC1.
12.3(11)T	This command was incorporated in Cisco IOS 12.3(11)T.

Usage Guidelines

Issuing the standalone command closes the relays on the VWICs installed in the MWR 1941-DC.

Examples

The following example closes the relays so that the MWR 1941-DC can be used as a stand-alone device.

standalone

Related Commands

Command	Description
mode y-cable	Invokes y-cable mode.
standby use-interface	Specifies the interfaces to be used for health and revertive interfaces.

standby use-interface

To designate a loopback interface as a health or revertive interface, use the standby use-interface command.

standby use-interface interface {health | revertive | backhaul}

Syntax Description

interface	Indicates the interface to be used with the specified parameter. For health and revertive, this is the loopback interface specified in the standby track command. For backhaul, the interface must be an MLPPP interface. If you want to use a serial interface as the backhaul, you must first configure that interface to be part of an MLPPP bundle.
health	Indicates the interface to monitor for an over temperature condition, the state of the processor, and the state of the T1/E1 firmware. If any of these watched conditions indicate a failure, this interface is brought down. Otherwise, the health interface remains in the up state.
revertive	Indicates the interface that acts as the revertive interface. If the MWR 1941-DC router changes state from active to standby, the revertive interface is brought up. If the MWR 1941-DC router changes state from standby to active, the revertive interface is brought down.
backhaul	Indicates the interface to be used for backhauling.

Defaults

By default, the MWR 1941-DC is configured to be used in a redundant configuration (no standalone) and the relays are open.

Command Modes

Y-cable configuration

Command History

Release	Modification
12.2(8)MC2	This command was introduced.

Usage Guidelines

The loopback interfaces that you specify for health and revertive interfaces must be the same loopback interfaces that you specified in the standby track command. In the standby track command, the decrement value for the revertive interface should always be less than that for other interfaces. We recommend that you use loopback101 for health and loopback102 for revertive.

The interface that you specify for the backhaul must be an MLPPP interface. If you want to use a serial interface as the backhaul, you must first configure that interface to be part of an MLPPP bundle. We recommend you use multilink1 for the backhaul interface.

Examples

The following example specifies loopback101 as the health interface and loopback102 as the revertive interface.

standby use-interface loopback101 health

standby use-interface loopback102 revertive

standby use-interface multilink1 backhaul

Related Commands

Command	Description
mode y-cable	Invokes y-cable mode.
redundancy	Invokes redundancy mode.
standalone	Specifies whether the MWR 1941-DC router is used in a redundant or stand-alone configuration.
standby	Sets HSRP attributes