DS OOB 55-1 VOM Traffic Monitor

This document provides information about the VOM Traffic Monitor feature and how to configure the monitor on the Cisco cBR Converged Broadband router.

Information About VOM Traffic Monitor

The VOM Traffic Monitor helps to monitor the traffic loss in the OOB 55-1 downstream traffic to the virtual-OM interface that is configured on the Cisco cBR-8 router.

Monitoring of the VOM traffic is depended on the configured time interval and the number of consecutive attempts taken to trigger the failure. The failure alarm is not triggered if the traffic resumes in between these attempts.

Prerequisites for VOM Traffic Monitor

The following prerequisites are applicable for VOM Traffic Monitor:

  • virtual-om is configured and bound to the RPD

  • vom input monitor is configured with interval and attempts

The following prerequisites are optional, but applicable to SNMP OOB trap monitoring:

  • virtual-om is configured and bound to the RPD

  • vom input monitor is configured with interval and attempts

  • Traps are enabled for oob vom-input

Restrictions for VOM Traffic Monitor

A single vom-input-monitor configuration affects all theconfigured virtual-om interfaces.

Configure VOM Traffic Monitor


Note

To know more about the commands referenced in this module, see the Cisco IOS Master Command List.

Enable Monitoring

Use the following command to enable monitoring.

cable oob
  vom-input-monitor interval <seconds> attempts <number>
  virtual-om <ID>
    ip <IP address> <subnet mask>
    join-group <group IP address> source-ip <IP address of the source> out-group <multicast IP address>

Example: Enable Monitoring

Router(config)#cable oob
vom-input-monitor interval 5 attempts 3
virtual-om 1
ip 10.x.x.x 255.x.x.x
join-group 232.x.x.x source-ip 10.x.x.x out-group xxxx::xxxx:x

Enable SNMP Trap

Use the following command to enable the SNMP trap.

Router(config)# snmp-server enable traps oob vom-input

Verify SNMP Traps

To verify SNMP traps, use the command similar to the following:

Router#show cable oob trap-status 
Cable OOB trap : Enabled

The SNMP trap OID for DS OOB 55-1 VOM traffic loss set and clear are monitored using .1.3.6.1.4.1.5591.1.1. This SNMP trap uses SCTE-ALARMS-MIB definition for trap.

The .1.3.6.1.4.1.5591.1.2.4.1 OID is used to show either traffic loss or traffic resumed with the following syntaxes.

Traffic loss: 
55D1_DS:SET:0:0:VOMID; Traffic loss - (s:source IP, g:group IP)
Traffic resumed: 
55D1_DS:CLEAR:0:0:VOMID; Traffic resumed - (s:source IP, g:group IP)

Verify Set or Clear in Syslog Messages

You can use the following examples to verify the Set or Clear in syslog messages:

  • If alarm is triggered (Traffic loss)
    002067: *Jun 20 16:03:17.969 IST: OOB VOM id:9 not received any packets from (S,G): 
(10.9.2.5,232.1.1.9) between 3 attempt(s) and interval of 5 minute(s), alarm_set
  • If alarm is cleared (Traffic resumes):
    000871: *Jun 20 17:02:09.381 IST: OOB VOM id:9 Traffic resumed received packet from (S,G):
 (10.9.2.5,232.1.1.10) alarm_clear
  • If RPD and VOM association is deleted (only if alarm flag is set):
    000405: *Jun 20 16:57:18.716 IST: OOB VOM id:9 RPD VOM association removed for (S,G): 
(232.1.1.9,10.9.2.5) alarm_clear

Verify Current Alarms

Verify the current alarm status and other details using the following command:

Router#show cable oob virtual-om id <ID>

Example: Verify Current Alarm Status

Router#show cable oob vir id 9
VOM ID : 9
Source IP : 10.x.x.x
Input McastGrp : 232.x.x.x
Ouput McastGrp : xxxx::xxxx:x
Ouput Redundant McastGrp : xxxx::xxxx:x
Pool Id : 10
Feature
3
Adj Lock : N
Received pkt count : 0
Forwarded pkt count : 0
Alarm set : Yes
DPIC : 6/1/0, 6/1/2

Feature Information for VOM Traffic Monitor

Use Cisco Feature Navigator to find information about the platform support and software image support. Cisco Feature Navigator enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to the www.cisco.com/go/cfn link. An account on the Cisco.com page is not required.


Note

The following table lists the software release in which a given feature is introduced. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Table 1. Feature Information for VOM Traffic Monitor

Feature Name

Releases

Feature Information

VOM Traffic Monitor

Cisco IOS XE Gibraltar 16.10.1g

This feature was introduced.