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This feature module describes the Hot-Standby 1+1 Redundancy feature. It includes information on the benefits of the new feature, supported platforms, related documents, troubleshooting tips, configuration examples, and a detailed command reference.
This document includes the following sections:
The Hot-Standby 1+1 Redundancy feature offers you the ability to provide high system availability when you configure a Cisco uBR7200 series universal broadband router to wait in hot-standby mode, protecting another Cisco uBR7200 series universal broadband router in case of system failure. The 1+1 redundancy feature provides three- to five-second automatic system recovery time, thus helping to prevent calls from dropping in the system.
 |
Note It is not uncommon for voice calls in their setup phase to be dropped when a CMTS system failure occurs, even with 1+1 redundancy configured on the cable network. |
In order for 1+1 redundancy to operate between a Protect CMTS and its Working CMTS peer, the configuration files for the two routers must be exactly the same, excluding configuration commands specific to 1+1 redundancy. Sections of this feature module describe the necessary differences in configuration between a Protect CMTS and its Working CMTS peer.
Configuration for 1+1 redundancy takes place at the cable modem card interface level. That is, rather than assigning an entire Cisco uBR7200 series to support another Cisco uBR7200 series, you configure individual interfaces on one Cisco uBR7200 series to protect individual interfaces installed in a different Cisco uBR7200 series.
The protection scenario currently available for Cisco uBR7200 series routers is the 1+1 scenario.
In a 1+1 redundancy protection scheme, the protecting cable modem card interface in the Protect CMTS and working cable modem card interface in the Working CMTS are each connected to the same downstream combiner/splitter and the same upstream combiner/splitter. See Figure 1. In the event of a system failure in the Working CMTS, the Protect CMTS assumes data and voice traffic responsibilities by switching both the upstream and downstream connections at the combiner/splitters from the Working CMTS to the Protect CMTS.
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Note 1+1 redundancy protection takes place on an interchassis basis, only. That is, you can't protect cable interfaces on a particular CMTS with cable interfaces installed in the same chassis. |
High Availability
The 1+1 redundancy feature provides three to five second automatic system recovery time in the event of system failure, thus helping to prevent calls from being dropped unintentionally. System failure in a nonredundancy (unprotected) deployment results in loss of all voice calls in progress as well as all voice calls in setup phase because the CMTS requires human intervention to reconfigure and bring the CMTS back on line.
Standards
No new or modified standards are supported by this feature.
MIBs
No new or modified MIBs are supported by this feature.
RFCs
No new or modified RFCs are supported by this feature.
To properly configure and activate 1+1 redundancy, you must be sure that you are running Cisco IOS Release 12.1(3)EC or a later version of IOS on the Cisco uBR7200 series universal broadband routers comprising your 1+1 redundancy CMTS peer system.
See the following sections for configuration tasks for the 1+1 redundancy feature. Each task i is either optional or required.
| Command | Purpose | |||
|---|---|---|---|---|
Step 1 | Router(config)#interface cable 4/0 | Enters interface configuration mode for cable interface0 on a cable modem card installed in slot4 of a CiscouBR7200series chassis. | ||
Step 2 | Router(config-if)#hccp 2 protect 2 10.1.2.3 | Specifies that cable interface 0 on the cable modem card installed in slot 4 will be assigned to protect member 2 of group2 and will transmit and receive redundancy status messages using destination IP address 10.1.2.3.
| ||
Step 3 | Router(config-if)# | Exits back to EXEC mode so that you can perform verification steps. |
| Command | Purpose | |
|---|---|---|
Step 1 | Router(config)#interface cable 4/0 | Enters interface configuration mode for cable interface0 on a cable modem card installed in slot4 of a CiscouBR7200series chassis. |
Step 2 | Router(config-if)#hccp 1 working 1 | Specifies that cable interface 0 on the cable modem card installed in slot 4 will be a working interface designated to be member 1 of group1. |
Step 3 | Router(config-if)# | Exits back to EXEC mode so that you can perform verification steps. |
| Command | Purpose | |
|---|---|---|
Step 1 | Router(config)#interface cable 4/0 | Enters interface configuration mode for cable interface0 on a cable modem card installed in slot4 of a CiscouBR7200series chassis. |
Step 2 | Router(config-if)#hccp ds-switch 1 wavecom 1.1.11.3 2 1.1.11.3 1 | Specifies module 2 on a Wavecom upconverter at IP address 1.1.11.3 as the host upconverter module connected to Working CMTS 1 and module 1 on the same Wavecom upconverter (with the same IP address location) as the peer or remote switch module connected to the Protect CMTS. |
Step 3 | Router(config-if)# | Exits back to EXEC mode so that you can perform verification steps. |
| Command | Purpose | |
|---|---|---|
Step 1 | Router(config)#interface cable 4/0 | Enters interface configuration mode for cable interface0 on a cable modem card installed in slot4 of a CiscouBR7200series chassis. |
Step 2 | Router(config-if)#hccp 1 authenticate md5 | Specifies MD5 as the authentication algorithm for group 1, which will provide automatic key-chain encryption. |
Step 3 | Router(config-if)#hccp 1 authenticate key-chain cisco1 | Enables authentication using the MD5 algorithm and defines the authentication key "cisco1" for group 1. |
Step 4 | Router(config-if)# | Exits back to EXEC mode so that you can perform verification steps. |
| Command | Purpose | |
|---|---|---|
Step 1 | Router(config)#interface cable 4/0 | Enters interface configuration mode for cable interface0 on a cable modem card installed in slot4 of a CiscouBR7200series chassis. |
Step 2 | Router(config-if)#hccp 2 timers 750 3000 | Configures the HELLO interval and hold time on a Protect CMTS in group 2 to 750 and 3000 milliseconds, respectively. |
Step 3 | Router(config-if)# | Exits back to EXEC mode so that you can perform verification steps. |
| Command | Purpose | |
|---|---|---|
Step 1 | Router(config)#interface cable 4/0 | Enters interface configuration mode for cable interface0 on a cable modem card installed in slot4 of a CiscouBR7200series chassis. |
Step 2 | Router(config-if)#hccp 2 track | Enables automatic failover behavior based on cable interface state for interfaces in group 2. When the interface state of the cable modem card interface in question moves from "up" to "down," failover automatically takes place. |
Step 3 | Router(config-if)# | Exits back to EXEC mode so that you can perform verification steps. |
| Command | Purpose | |
|---|---|---|
Step 1 | Router(config)#interface cable 4/0 | Enters interface configuration mode for cable interface0 on a cable modem card installed in slot4 of a CiscouBR7200series chassis. |
Step 2 | Router(config-if)#hccp 2 revert | Enables reversion capability on cable interfaces that are members of group 2. |
Step 3 | Router(config-if)#hccp 2 reverttime 15 | Specifies the time before a Working CMTS that has experienced system failover waits before automatically switching back to a Working CMTS to 15 minutes. |
Step 4 | Router(config-if)# | Exits back to EXEC mode so that you can perform verification steps. |
| Command | Purpose |
|---|---|
Router#hccp 2 switch 2 | Allows you to manually configure a Protect CMTS or Working CMTS to switchover with its peer. |
| Command | Purpose |
|---|---|
Router#hccp 2 lockout | Prevents a Working CMTS that is currently sending and receiving data and voice traffic from automatically switching to a Protect CMTS in the same group. |
Router#hccp 2 unlockout | Makes a Working CMTS that has been manually placed in lockout state using the hccp lockout command available for automatic or manual switchover to a Protect CMTS. |
Step 2 Enter interface configuration mode for the cable interface referred to in Step 1 by entering the interface cable interface number command at the privileged EXEC prompt.
Step 3 Shut down the working cable interface by issuing the shutdown command.
Step 4 Type ^Z to exit back to privileged EXEC mode.
Step 5 Enter the show hccp detail command at the privileged EXEC prompt to display all 1+1 redundancy information configured on the Cisco uBR7200 series.
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Note You can optionally use the show hccp or show hccp brief commands at this point, however, Cisco recommends that you take advantage of the detailed output that is automatically displayed when you use the show hccp detail privileged EXEC command. |
Router# show hccp detail
Cable3/0 - Group 2 Working, disabled, blocking
authentication none
hello time 2000 msec, hold time 6000 msec
sync time 1000 msec, suspend time 120000 msec
switch time 240000 msec retries 5
local state is Init
tran 0, out staticsync
last switch reason is none
Member 2 non-functional
ip addr: working unknown, protect unknown
downstream wavecom (1.1.11.3/5, 1.1.11.3/6), upstream none
tran #: SYNC 0, last SYNC_ACK 0, last HELLO_ACK 0
hold timer expires in never
Cable4/0 - Group 1 Protect, enabled, blocking
authentication md5, key-chain "cisco1"
hello time 2000 msec, hold time 6000 msec
sync time 1000 msec, suspend time 120000 msec
local state is Learn, non-revertive
tran 330, out staticsync
last switch reason is none
hello timer expires in 00:00:01.476
Member 1 standby
ip addr: working 10.20.111.11, protect 10.20.111.10
downstream wavecom (1.1.11.3/1, 1.1.11.3/2), upstream none
tran #: SYNC 0, last SYNC_ACK 16, last HELLO_ACK 330
hold timer expires in 00:00:05.140
Use the following new show commands to display 1+1 redundancy information on your Protect CMTS and Working CMTS.
| Command | Purpose |
|---|---|
Router#show hccp | Displays information on any groups associated with cable interfaces. |
Router#show hccp interface interface number | Displays information on all groups associated with a specific cable interface. |
This section provides the following 1+1 redundancy configuration examples:
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Note Arrows to the left of the configuration file indicate command lines specific to Hot-Standby 1+1 Redundancy. |
Current configuration: ! version 12.0 no service pad service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname ubr7246-2 ! boot system tftp /tftpboot/annex4/jzang/ubr7200-p-mz 10.0.0.2 ! no cable qos permission create no cable qos permission update cable qos permission modems ! ip subnet-zero no ip domain-lookup ip host abrick 223.255.254.254 ! ! key chain cat key 1 key-string abcdefg key 2 key-string 123456789 ! interface FastEthernet0/0 ip address 10.20.111.11 255.255.255.248 no ip directed-broadcast no ip mroute-cache no keepalive half-duplex ! interface Ethernet1/0 ip address 1.1.11.2 255.255.255.248 no ip directed-broadcast no ip mroute-cache ! interface Ethernet1/1 no ip address no ip directed-broadcast no ip mroute-cache shutdown ! interface Ethernet1/2 no ip address no ip directed-broadcast no ip mroute-cache shutdown ! interface Ethernet1/3 no ip address no ip directed-broadcast no ip mroute-cache shutdown ! interface Cable4/0 ip address 10.20.111.129 255.255.255.240 no ip directed-broadcast ip helper-address 10.0.0.2 cable downstream annex B cable downstream modulation 64qam cable downstream interleave-depth 32 cable downstream frequency 441000000 cable upstream 0 frequency 11408000 cable upstream 0 power-level 8 no cable upstream 0 shutdown cable upstream 1 shutdown cable upstream 2 shutdown cable upstream 3 shutdown cable upstream 4 shutdown cable upstream 5 shutdown hccp 1 working 1 hccp 1 ds-switch 1 wavecom 1.1.11.3 2 1.1.11.3 1 hccp 1 authentication md5 hccp 1 authentication key-chain cat ! router eigrp 1 passive-interface Cable4/0 network 10.20.111.8 0.0.0.7 network 10.20.111.128 0.0.0.15 ! ip classless no ip http server ! snmp-server engineID local 00000009020000D058277000 snmp-server community private RW snmp-server manager ! line con 0 exec-timeout 0 0 transport input none line aux 0 stopbits 1 line vty 0 4 login ! end
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Note Arrows to the left of the configuration file indicate command lines specific to Hot-Standby 1+1 Redundancy. |
Current configuration: ! version 12.0 no service pad service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname ubr7246-1 ! boot system tftp /tftpboot/annex4/jzang/ubr7200-p-mz 10.0.0.2 ! no cable qos permission create no cable qos permission update cable qos permission modems ! ip subnet-zero no ip domain-lookup ip host abrick 223.255.254.254 ! key chain cat key 1 key-string abcdefg key 2 key-string 123456789 ! interface FastEthernet0/0 ip address 10.20.111.10 255.255.255.248 no ip directed-broadcast no ip mroute-cache no keepalive half-duplex ! interface Ethernet1/0 ip address 1.1.11.1 255.255.255.248 no ip directed-broadcast no ip mroute-cache ! interface Ethernet1/1 no ip address no ip directed-broadcast no ip mroute-cache shutdown ! interface Ethernet1/2 no ip address no ip directed-broadcast no ip mroute-cache shutdown ! interface Ethernet1/3 no ip address no ip directed-broadcast no ip mroute-cache shutdown ! interface Cable3/0 no ip address no ip directed-broadcast ip helper-address 10.0.0.2 shutdown cable downstream annex B cable downstream modulation 64qam cable downstream interleave-depth 32 cable downstream frequency 441000000 cable upstream 0 frequency 11408000 cable upstream 0 power-level 10 no cable upstream 0 shutdown hccp 2 working 2 hccp 2 ds-switch 2 wavecom 1.1.11.3 5 1.1.11.3 6 ! interface Cable4/0 ip address 10.20.111.129 255.255.255.240 no ip directed-broadcast ip helper-address 10.0.0.2 cable downstream annex B cable downstream modulation 64qam cable downstream interleave-depth 32 cable downstream frequency 441000000 cable downstream channel-id 0 cable upstream 0 frequency 11408000 cable upstream 0 power-level 8 no cable upstream 0 shutdown cable upstream 1 shutdown cable upstream 2 shutdown cable upstream 3 shutdown cable upstream 4 shutdown cable upstream 5 shutdown hccp 1 protect 1 10.20.111.11 hccp 1 ds-switch 1 wavecom 1.1.11.3 1 1.1.11.3 2 hccp 1 authentication md5 hccp 1 authentication key-chain cat ! router eigrp 1 passive-interface Cable4/0 network 10.20.111.8 0.0.0.7 network 10.20.111.128 0.0.0.15 ! ip classless no ip http server ! snmp-server engineID local 00000009020000505461E400 snmp-server community private RW snmp-server manager ! line con 0 exec-timeout 0 0 transport input none line aux 0 stopbits 1 line vty 0 4 login ! end
This section documents new commands related to the 1+1 redundancy feature. All other commands used with this feature are documented in the Cisco IOS Release 12.0 command reference publications.
To specify the authentication algorithm on a Working CMTS, Protect CMTS, or both use the hccp authenticate interface configuration command. To disable authentication on a Working CMTS or Protect CMTS, use the no form of this command.
hccp group authenticate md5 | text
Syntax Description
group The group number for the specified interface. Valid values are any number from 1 to 255, inclusive. md5 Authentication algorithm. In Cisco IOS Release 12.1(3)EC, MD5 is the only authentication algorithm supported. text Unencrypted text specification. Rather than automatically encrypting the authentication key-chain when using the MD5 authentication algorithm, Cisco IOS simply passes the authentication key-chain as standard, unencrypted text.
Defaults
The default authentication algorithm is MD5.
Command Modes
Interface configuration
Command History
12.1(3)EC This command was introduced.
Release
Modification
Usage Guidelines
Use this command in conjunction with the hccp authenticate key-chain command to enable and specify the type of 1+1 redundancy authentication you will use in your protection scheme.
Examples
The following example specifies MD5 as the authentication algorithm for group 1:
interface cable 3/0 hccp 1 authenticate md5
Related Commands
hccp authenticate key-chain Enables authentication on a given interface and specifies one or more keys that can be used to perform authentication for a specified group.
Command
Description
To enable authentication and define one or more authentication keys to use in a specified group, use the hccp authenticate key-chain interface configuration command. To disable authentication, use the no form of this command. The key chains you define must match one or more key chains configured in the Working CMTS or Protect CMTS's configuration file.
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Note You cannot perform authentication on a specified group until you have first defined at least one authentication key chain in global configuration mode. |
Syntax Description
group The group number for the specified interface. Valid values are any number from 1 to 255, inclusive. key-chain A text string matching a key chain in the Working CMTS or Protect CMTS's configuration file. A key chain must have at least one key and can have up to 2,147,483,647 keys.
Defaults
No default behavior or values.
Command Modes
Interface configuration
Command History
12.1(3)EC This command was introduced.
Release
Modification
Usage Guidelines
Use this command in conjunction with the hccp authenticate command to enable and specify the type of 1+1 redundancy authentication you will use in your protection scheme.
Examples
The following example enables authentication using the MD5 algorithm and defines the authentication key "cisco1" for group 1:
! key chain cisco1 key 1 key-string abcdefg key 2 key-string 123456789 ! . . . ! interface cable 3/0 hccp 1 authenticate md5 hccp 1 authenticate key-chain cisco1 !
Related Commands
hccp authenticate Specifies the authentication algorithm for the Working CMTS or Protect CMTS. key chain A global configuration command that allows you to define one or more key chains for authentication between Working CMTS or Protect CMTSs. For more specific information, refer to the Cisco IOS Release 12.0 Command Reference Master Index on CCO.
Command
Description
To specify the downstream upconverter module for a Working CMTS or Protect CMTS, use the hccp ds-switch interface configuration command. To negate a downstream upconverter assignment, use the no form of this command.
hccp group ds-switch member make host-ipaddr host-module peer-ipaddr peer-module
Syntax Description
group The group number for the specified interface. Valid values are any number from 1 to 255, inclusive. member The member number within the specified group. make The maker of the specified upconverter. Currently, only the Wavecom upconverter is supported. host-ipaddr The IP address of the upconverter module1 to which the host CMTS is connected. host-module The upconverter module number to which the host CMTS is connected. This location is expressed as a simple numeric designation. peer-ipaddr The IP address of the upconverter module to which the peer (or remote) CMTS is connected. peer-module The upconverter module number1 to which the peer (or remote) CMTS is connected. This location is expressed as a simple numeric designation.
Defaults
Upconverter specification and activation is disabled by default and must be specified before switching can take place.
Command Modes
Interface configuration
Command History
12.1(3)EC This command was introduced.
Release
Modification
Usage Guidelines
It is necessary to configure the downstream upconverter module for all Protect CMTSs and Working CMTSs. If you do not specify the downstream upconverter module for all Protect CMTSs and Working CMTSs, you cannot switch between a Protect CMTS and Working CMTS.
Examples
The following configuration file example specifies module 2 on a Wavecom upconverter at IP address 1.1.11.3 as the host switch module connected to Working CMTS 1 and module 1 on the same Wavecom upconverter (with the same IP address location) as the peer or remote switch module connected to the Protect CMTS:
hccp 1 working 1 hccp ds-switch 1 wavecom 1.1.11.3 2 1.1.11.3 1
Related Commands
hccp protect Allows you to configure a CMTS to be a Protect CMTS for a specified Working CMTS in a 1+1 redundancy environment. hccp working Allows you to designate a CMTS to be a Working CMTS in a 1+1 redundancy environment.
Command
Description
To prevent a Working CMTS from automatically switching to a Protect CMTS in the same group, use the hccp lockout EXEC command.
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Note This command is applicable only to Working CMTSs in a given group. Issuing this command on a Protect CMTS has no effect. |
Syntax Description
group The group number for the specified interface. Valid values are any number from 1 to 255, inclusive.
Defaults
By default, the hccp lockout command is inactive.
Command Modes
EXEC
Command History
12.1(3)EC This command was introduced.
Release
Modification
Usage Guidelines
You might want to prevent a Working CMTS from automatically switching back to a Protect CMTS for testing or additional configuration purposes. For example, you might want to fully test protecting cable interfaces on your Cisco uBR7200 series before returning it to protect status.
Examples
The following example activates the lockout feature of a Working CMTS in group 1:
hccp 1 lockout
Related Commands
hccp unlockout Negates the effects of the hccp lockout EXEC command, making the CMTS available for automatic switchover from a Working CMTS to a Protect CMTS.
Command
Description
To configure a particular cable interface to protect another cable interface in the same group, use the hccp protect interface configuration command. To undo a particular host cable interface protection assignment, use the no form of this command.
hccp group protect member ipaddr
Syntax Description
group The group number of both the Working and Protect cable interfaces. Valid values are any number from 1 to 255, inclusive. member The member number of the specified Working cable interface. Valid values are any number from 1 to 255, inclusive. ipaddr An IP address for any working interface (other than protected cable interfaces) installed in the Working CMTS that can transmit and receive redundancy status messages.
Defaults
No default behavior or values.
Command Modes
Interface configuration
Command History
12.1(3)EC This command was introduced.
Release
Modification
Examples
The following example configures host cable interface 4/0 to protect member 2 of group 2 at IP address 1.1.11.2:
interface cable 4/0 hccp 2 protect 2 1.1.11.2
Related Commands
hccp working Configures a specified cable interface to be a working member of a given group.
Command
Description
To configure a cable interface on a Protect CMTS that has assumed working capacity to automatically revert back to a Protect CMTS for a specified group, use the hccp revert interface configuration command. To disable the ability for the specified cable interface to automatically revert back to protect status, use the no form of this command.
hccp group revert
Syntax Description
group The group number for the specified interface. Valid values are any number from 1 to 255, inclusive.
Defaults
This command is disabled by default.
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Note This command is disabled by default because some customers may want to perform testing or other such activity on the Protect CMTS's working peer before restoring it to working status. |
Command Modes
Interface configuration
Command History
12.1(3)EC This command was introduced.
Release
Modification
Usage Guidelines
Using this command in conjunction with the hccp reverttime command gives you the ability to set up your protecting cable interfaces to automatically switch between working and protecting capacity without your intervention. Otherwise, whenever a switchover has occurred, you must manually reactivate the failed Working CMTS and manually return the Protect CMTS to protect status using the hccp switch command.
Examples
The following example configures cable interface 4/0 on a Protect CMTS in group 2 to automatically revert to protect status after the Working CMTS peer has returned to active duty:
interface cable 4/0 hccp 2 revert
Related Commands
hccp reverttime Specifies the time the Working CMTS waits before automatically switching back to a Working CMTS following system failover.
Command
Description
To specify the amount of time a Working CMTS waits before automatically reverting back to a Working CMTS for a specified group following system failover, use the hccp reverttime interface configuration command. To negate a revert-time assignment, use the no form of this command.
hccp group reverttime revert-time
Syntax Description
group The group number for the specified interface. Valid values are any number from 1 to 255, inclusive. revert-time The amount of time (in minutes) that a Working CMTS waits before automatically switching back to a Working CMTS following system failover. The allowable range is 1 to 65,535 minutes, inclusive.
Defaults
The default time a Working CMTS that has experienced a failover waits before automatically switching back to a Working CMTS is 30 minutes.
Command Modes
Interface configuration
Command History
12.1(3)EC This command was introduced.
Release
Modification
Usage Guidelines
Use this command in conjunction with the hccp revert command on Working CMTSs to specify your own delay intervals for automatic switchover.
Examples
The following example configures cable interface 3/0 on a Working CMTS in group 2 to wait 15 minutes before automatically reverting back to working status after a system failover:
interface cable 3/0 hccp 2 reverttime 15
Related Commands
hccp revert Configures a cable interface on a Protect CMTS in a specified group that has assumed working capacity to automatically revert back to a Protect CMTS.
Command
Description
To manually switch a Protect CMTS with its Working CMTS peer (or vice versa), use the hccp switch EXEC command.
hccp group switch member
Syntax Description
group The group number for the specified interface. Valid values are any number from 1 to 255, inclusive. member The member number for the specified interface. Valid values are any number from 1 to 255, inclusive.
Defaults
No default behavior or values.
Command Modes
EXEC
Command History
12.1(3)EC This command was introduced.
Release
Modification
Usage Guidelines
This command overrides any configuration you may have made on your Protect CMTS and Working CMTSs using the hccp revert and hccp reverttime commands. In addition, you can issue the hccp switch command on either a Protect CMTS or a Working CMTS to force it to change places with its peer.
Examples
The following example configures the host Protect CMTS to assume traffic responsibility for member 2 Working CMTS in group 2:
hccp 2 switch 2
Related Commands
hccp lockout Prevents a Working CMTS from automatically switching to a Protect CMTS in the same group. hccp unlockout Negates the effects of the hccp lockout EXEC command, making the CMTS available for automatic switchover from a Working CMTS to a Protect CMTS.
Command
Description
To configure HELLO packet interval and hold time for a specified group on a Protect CMTS, use the hccp timers interface configuration command. To erase your HELLO and hold time configuration and to assume the default values for each parameter, use the no form of this command.
hccp group timers hello-time hold-time |
Note Issuing the no form of this command erases any manual HELLO interval and hold time values and automatically resets them to their default values. |
Syntax Description
group The group number for the specified interface. Valid values are any number from 1 to 255, inclusive. hello-time The HELLO packet interval (in milliseconds) between subsequent HELLO packet transmissions. The acceptable range is 333 to 5,000 milliseconds, inclusive. hold-time The time (in milliseconds) that a Protect CMTS will wait before assuming control of voice traffic for a Working CMTS that has failed to acknowledge a series of HELLO packets. The acceptable range is 1,000 to 25,000 milliseconds, inclusive.
Defaults
The default HELLO interval is 2,000 milliseconds, and the default hold time is 6,000 milliseconds.
Command Modes
Interface configuration
Command History
12.1(3)EC This command was introduced.
Release
Modification
Examples
The following example configures the HELLO interval and hold time on a Protect CMTS in group 2 to 750 and 3,000 milliseconds, respectively:
hccp 2 timers 750 3000
Related Commands
hccp protect Configures a particular cable interface to protect another peer cable interface in the same group. hccp working Configures a specified cable interface to be a working member of a given group.
Command
Description
To configure a cable interface on a Working CMTS or Protect CMTS to enable automatic failover based on the interface state, use the hccp track interface configuration command. To allow a Working CMTS or Protect CMTS to perform automatic failover based on interface state, use the no form of this command.
hccp group track
Syntax Description
group The group number for the specified interface. Valid values are any number from 1 to 255, inclusive.
Defaults
This command is enabled by default.
Command Modes
Interface configuration
Command History
12.1(3)EC This command was introduced.
Release
Modification
Usage Guidelines
This command must be used in conjunction with the keepalive IOS command. If no keepalive interval has been configured in the configuration file for the Cisco uBR7200 series, the hccp track command has no affect. Automatic failover occurs if the given interface state moves from "up" to "down."
Examples
The following example enables failover behavior on a CMTS in group 2:
hccp 2 track
Related Commands
keepalive A global configuration command that allows you to specify the keepalive message transmission interval on Working CMTSs or Protect CMTSs. For more specific information, refer to the Cisco IOS Release 12.0 Command Reference Master Index on CCO.
Command
Description
To reverse the effects of the hccp lockout command—that is, to make a Working CMTS available for automatic switchover to Protect CMTS, use the hccp unlockout EXEC command.
|
Note This command is applicable only to Working CMTSs in a given group. Issuing this command on a Protect CMTS has no effect. |
Syntax Description
group The group number for the specified interface. Valid values are any number from 1 to 255, inclusive.
Defaults
By default, the hccp unlockout command is active.
Command Modes
EXEC
Command History
12.1(3)EC This command was introduced.
Release
Modification
Usage Guidelines
This command reverses the effect of the hccp lockout command. Once you have reconfigured or tested your Protect CMTS, issuing this command manually reintroduce the CMTS back into your 1+1 redundancy protection scheme.
Examples
The following example deactivates the lockout feature of a Working CMTS in group 1:
hccp 1 unlockout
Related Commands
hccp lockout Prevents a Working CMTS from automatically switching to a Protect CMTS in the same group.
Command
Description
To designate a cable interface on a CMTS in the specified group to be a Working CMTS, use the hccp working interface configuration command. To undo a Working CMTS assignment, use the no form of this command.
hccp group working member
Syntax Description
group The group number for the specified interface. Valid values are any number from 1 to 255, inclusive. member The member number for the specified interface. Valid values are any number from 1 to 255, inclusive.
Defaults
No default behavior or values.
Command Modes
Interface configuration
Command History
12.1(3)EC This command was introduced.
Release
Modification
Examples
The following example designates cable interface 4/0 as member number 2 of group 2 as a Working CMTS interface:
interface cable 4/0 hccp 2 working 2
Related Commands
hccp protect Configures a particular cable interface to protect another cable interface in the same group.
Command
Description
To display information on groups associated with cable interfaces, use the show hccp privileged EXEC command.
show hccp { group } { brief }
Syntax Description
group A specific group number. Valid values are any number from 1 to 255, inclusive. You can use the optional group variable in the show hccp command to display information for only the specified group. brief Gives you the option to display a brief summary of the groups, configuration types, member numbers, and status for cable interfaces.
Defaults
No default behavior or values.
Command Modes
Privileged EXEC
Command History
12.1(3)EC This command was introduced.
Release
Modification
Examples
The following examples are from the show hccp and show hccp brief commands:
ROUTER# show hccp Cable4/0 - Group 1 Protect, enabled, blocking authentication md5, key-chain "cisco1" hello time 2000 msec, hold time 6000 msec Member 1 standby ip addr: working 10.20.111.11, protect 10.20.111.10 downstream wavecom (1.1.11.3/1, 1.1.11.3/2), upstream none ROUTER# show hccp brief Interface Config Grp Mbr Status Ca4/0 Protect 1 1 standby
Related Commands
show hccp interface A more directed form of the show hccp command that displays group information for a specific cable interface on which one or more groups and authentication modes have been configured.
Command
Description
To display information on a group associated with a specific cable interface, use the show hccp interface privileged EXEC command.
show hccp interface interface { brief }
Syntax Description
interface The cable interface for which you want to display group information. The information presented includes groups, configuration types, member numbers, status, authentication algorithms, authentication key chains, timers, IP address assignments, and downstream switch designations for the specified cable interface. brief Gives you the option to display a brief summary of the groups, configuration types, member numbers, and status for a specified cable interface.
Defaults
No default behavior or values.
Command Modes
Privileged EXEC
Command History
12.1(3)EC This command was introduced.
Release
Modification
Examples
The following examples are from the show hccp interface cable 4/0 and show hccp interface cable 4/0 brief commands:
ROUTER# show hccp interface cable 4/0 Cable4/0 - Group 1 Protect, enabled, blocking authentication md5, key-chain "cisco1" hello time 2000 msec, hold time 6000 msec Member 1 standby ip addr: working 10.20.111.11, protect 10.20.111.10 downstream wavecom (1.1.11.3/1, 1.1.11.3/2), upstream none ROUTER# show hccp interface cable 4/0 brief Interface Config Grp Mbr Status Ca4/0 Protect 1 1 standby
Related Commands
show hccp A more generalized form of this command that displays group information for all cable interfaces on which one or more groups and authentication modes have been configured.
Command
Description
This section documents new debug commands related to the 1+1 redundancy feature. All other commands used with this feature are documented in the Cisco IOS Release 12.0 command reference publications.
To display authentication debug messages for groups, use the debug hccp authentication privileged EXEC command. Once you have activated debugging with the debug hccp events command, you can use the debug hccp authentication command to activate and deactivate additional authentication message output. To disable 1+1 redundancy authentication debug message output, use the no form of this command.
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Note The debug hccp authentication command is designed to be used in conjunction with, and as an augmentation to, the debug hccp events and debug hccp sync commands. If neither the debug hccp events or debug hccp sync command has been activated, activating the debug hccp authentication command has no effect on debug message output. |
Syntax Description
This command has no arguments or keywords.
Defaults
Debug message output for 1+1 redundancy authentication is disabled by default.
Command History
12.1(3)EC This command was introduced.
Release
Modification
Examples
The following example shows the additional 1+1 redundancy authentication debug message output produced when the debug hccp authentication command has been activated:
Router# debug hccp authentication Sep 7 09:51:50.151:HCCP 1 0->1:HELLO Learn tran 31708 Sep 7 09:51:50.151:auth md5 keyid 1 digest B77F65ED 1B38ED5C 87A7037B C006DAFB
Related Commands
debug hccp events Allows you to display all group interaction debug messages. debug hccp sync Allows you to display 1+1 redundancy synchronization debug messages.
Command
Description
To display debug messages for all group interaction, excluding authentication message output, use the debug hccp events privileged EXEC command. To disable group debug message output, use the no form of this command.
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Note Once you have activated the debug hccp events command, you can also activate the debug hccp authentication command to provide authentication message output in addition to standard group message output. |
Syntax Description
This command has no arguments or keywords.
Defaults
Debug message output for all group interaction is disabled by default.
Command History
12.1(3)EC This command was introduced.
Release
Modification
Examples
The following example shows group interaction debug message output produced when the debug hccp events command has been activated:
Router# debug hccp events Sep 7 09:51:50.151:HCCP 1 0->1:HELLO Learn tran 31708
Related Commands
debug hccp authentication Allows you to display 1+1 redundancy authentication debug message output once the debug hccp events or debug hccp sync command has been activated. debug hccp sync Allows you to display 1+1 redundancy synchronization debug messages.
Command
Description
To display 1+1 redundancy synchronization debug messages, use the debug hccp sync privileged EXEC command. To disable display 1+1 redundancy synchronization debug message output, use the no form of this command.
debug hccp syncSyntax Description
This command has no arguments or keywords.
Defaults
Debug message output for all group interaction is disabled by default.
Command History
12.1(3)EC This command was introduced.
Release
Modification
Examples
The following example shows display 1+1 redundancy synchronization debug message output produced when the debug hccp sync command has been activated:
Router# debug hccp sync Sep 7 09:57:25.215:HCCP 1 0<-1:SYNC Teach tran 88 type DOCSIS10, tran_sync 82 Sep 7 09:57:25.215:HCCP 1 0->1:SYNC_ACK Learn tran 88 Sep 7 09:57:25.219:DOCSIS10_QOS:qos 1
Related Commands
debug hccp authentication Allows you to display 1+1 redundancy authentication debug message output once the debug hccp events or debug hccp sync command has been activated. debug hccp events Allows you to display all group interaction debug messages.
Command
Description
Posted: Thu Sep 28 10:35:09 PDT 2000
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