-
- Downstream Interface Configuration
- Upstream Interface Configuration
- DOCSIS Interface and Fiber Node Configuration
- DOCSIS Load Balancing Groups
- DOCSIS Load Balancing Movements
- DOCSIS 3.0 Downstream Bonding
- DOCSIS 2.0 A-TDMA Modulation Profiles
- Downstream Resiliency Bonding Group
- Downstream Channel ID Assignment
- Upstream Channel Bonding
- Spectrum Management and Advanced Spectrum Management
- Upstream Scheduler Mode
- Generic Routing Encapsulation
- Transparent LAN Service over Cable
- Downgrading Channel Bonding in Battery Backup Mode
- Energy Management Mode
- Upstream Bonding Support for D-PON
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- IP Access Control Lists
- Creating an IP Access List and Applying It to an Interface
- Creating an IP Access List to Filter IP Options, TCP Flags, Noncontiguous Ports
- Refining an IP Access List
- IP Named Access Control Lists
- IPv4 ACL Chaining Support
- IPv6 ACL Chaining with a Common ACL
- Commented IP Access List Entries
- Standard IP Access List Logging
- IP Access List Entry Sequence Numbering
- ACL IP Options Selective Drop
- ACL Syslog Correlation
- IPv6 Access Control Lists
- IPv6 Template ACL
- IPv6 ACL Extensions for Hop by Hop Filtering
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- Call Home
- SNMP Support over VPNs—Context-Based Access Control
- SNMP Cache Engine Enhancement
- Onboard Failure Logging
- Control Point Discovery
- IPDR Streaming Protocol
- Usage-Based Billing (SAMIS)
- Frequency Allocation Information for the Cisco CMTS Routers
- Flap List Troubleshooting
- Maximum CPE and Host Parameters
- SNMP Background Synchronization
- Online Offline Diagnostics
- Index
SNMP Background
Synchronization
The SNMP Background Synchronization features provides periodic background synchronization of DOCSIS MIB data from line card to Supervisor in order to improve the performance of the SNMP polling of these MIB tables.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http://tools.cisco.com/ITDIT/CFN/. An account on http://www.cisco.com/ is not required.
Contents
- Information About SNMP Background Synchronization
- How to Configure SNMP Background Synchronization
- Configuring Example for SNMP Background Synchronization
- Feature Information for SNMP Background Synchronization
Information About SNMP Background Synchronization
To improve SNMP performance, SNMP background synchronization feature is introduced to synchronize the SNMP MIB information between the line card and the Supervisor. It is based on raw socket and uses TCP protocol. The benefits of the SNMP Background Synchronization include:
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Bundles small packets together before sending out, increases IPC channel utilization.
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Use pre-allocated static buffer to send/receive message, avoid buffer allocation at run time.
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In order not to burden CPU when the system is in high load, SNMP background synchronization receive process can sleep based on CPU utilization, so it will not compete with other priority processes.
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Significantly improve SNMP polling performance for supported MIB tables, and reduce the CPU utilization in both Supervisor and line card.
The following MIB tables are supported in SNMP background synchronization:
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docsQosParamSetEntry
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docsIetfQosParamSetEntry
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docsQos3ParamSetEntry
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docsIf3CmtsCmUsStatusEntry
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docsIfCmtsCmStatusEntry
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docsSubMgtCpeControlEntry
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docsSubMgtCmFilterEntry
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cdxCmtsCmStatusExtEntry
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docsLoadBalCmtsCmStatusEntry
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docsIf3CmtsCmRegStatusTable
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docsIfSignalQualityTable
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docsifCmtsServiceTable
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cdxCmtsServiceExtEntry
How to Configure SNMP Background Synchronization
Enabling SNMP Background Synchronization
Before you begin
To use the cable bgsync command, you must configure the service internal command in global configuration mode.
SNMP background synchronization is enabled by default, use no cable bgsync active to disable this feature, and use cable bgsync active to enable it again. The following procedure lists detailed steps to enable SNMP background synchronization:
enable configure terminal cable bgsync active exit
Setting Data Interval
Before you begin
To use the cable bgsync command, you must configure the service internal command in global configuration mode. Use the cable bgsync command carefully as it can impact the CPU utilization.
To set the data intervals for the background synchronization of SNMP MIB data on the Cisco cBR routers, use the cable bgsync {itime i-interval|ptime p-interval} command in global configuration mode. To disable background synchronization, use the no form of this command. The following procedure lists detailed steps to set data interval:
enable configure terminal service internal cable bgsync itime i-interval cable bgsync ptime p-interval exit
itime is the interval of synchronizing all related MIB tables from line card to Supervisor. The valid range is from 5 to 31536000. The default value is 86400. ptime is the interval of synchronizing the changed MIB content from line card to Supervisor.
Verifying SNMP Background Synchronization
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To display the current status of the SNMP background synchronization, use the show cable bgsync command as shown in the example below:
Router#show cable bgsync Background Sync is active, uptime is 5 minutes, 14 seconds. Background Sync last active time is 5 minutes, 14 seconds. ago. I-packet interval time is 1 day, P-packet interval time is 5 senconds. Line Card with bg-sync: 3/0 Line Card working on I syncing: Last clear cable bg sync counters Time: Total bytes: 85864 Total background sync packets: 2109 Ack packets: 0 Run Ctrl Msg packets: 2 Data packets: 0 Interval packets: 2002 I Type packets: 230 P Type packets: 1772 Bg sync data IPC lost packets: 0 Background Sync statistics for the last 00:07:34 =============================================================== ipc packets 0-30k: 105 ipc packets 30-60k: 0 ipc packets 60-100k: 0 msg per packet average: 20 msg per packet max: 113 msg per packet min: 1 msg per packet under 3: 60 =============================================================== type packets cpu-total(ms) avg(us) max(us) serv flow 904 3 3 1000 sflog 0 0 0 0 cm 17 0 0 0 cmtx 296 0 0 0 paramset 112 0 0 0 DXIF 298 0 0 0 sid 208 0 0 0 uschan 167 1 5 1000 --------------------------------------------------------------- IPC PKTs 105 4 0 ms 1 ms ===================================================================================== slot type packets bytes pps Bps wrong_len_pkts 0 serv flow 0 0 0.0 0.0 0 0 sflog 0 0 0.0 0.0 0 0 cm 0 0 0.0 0.0 0 0 cmtx 0 0 0.0 0.0 0 0 paramset 0 0 0.0 0.0 0 0 DXIF 0 0 0.0 0.0 0 0 sid 0 0 0.0 0.0 0 0 uschan 0 0 0.0 0.0 0 1 serv flow 0 0 0.0 0.0 0 1 sflog 0 0 0.0 0.0 0 1 cm 0 0 0.0 0.0 0 1 cmtx 0 0 0.0 0.0 0 1 paramset 0 0 0.0 0.0 0 1 DXIF 0 0 0.0 0.0 0 1 sid 0 0 0.0 0.0 0 1 uschan 0 0 0.0 0.0 0 2 serv flow 0 0 0.0 0.0 0 2 sflog 0 0 0.0 0.0 0 2 cm 0 0 0.0 0.0 0 2 cmtx 0 0 0.0 0.0 0 2 paramset 48 7680 0.0 0.0 0 2 DXIF 0 0 0.0 0.0 0 2 sid 16 512 0.0 0.0 0 2 uschan 0 0 0.0 0.0 0 3 serv flow 904 25104 4.4 115.4 0 3 sflog 0 0 0.0 0.0 0 3 cm 17 981 0.0 2.0 0 3 cmtx 296 8607 0.7 20.6 0 3 paramset 64 8368 0.0 0.0 0 3 DXIF 298 21876 0.9 74.3 0 3 sid 192 4756 0.1 6.8 0 3 uschan 167 5832 0.3 10.7 0 6 serv flow 0 0 0.0 0.0 0 6 sflog 0 0 0.0 0.0 0 6 cm 0 0 0.0 0.0 0 6 cmtx 0 0 0.0 0.0 0 6 paramset 0 0 0.0 0.0 0 6 DXIF 0 0 0.0 0.0 0 6 sid 0 0 0.0 0.0 0 6 uschan 0 0 0.0 0.0 0 7 serv flow 0 0 0.0 0.0 0 7 sflog 0 0 0.0 0.0 0 7 cm 0 0 0.0 0.0 0 7 cmtx 0 0 0.0 0.0 0 7 paramset 0 0 0.0 0.0 0 7 DXIF 0 0 0.0 0.0 0 7 sid 0 0 0.0 0.0 0 7 uschan 0 0 0.0 0.0 0 8 serv flow 0 0 0.0 0.0 0 8 sflog 0 0 0.0 0.0 0 8 cm 0 0 0.0 0.0 0 8 cmtx 0 0 0.0 0.0 0 8 paramset 0 0 0.0 0.0 0 8 DXIF 0 0 0.0 0.0 0 8 sid 0 0 0.0 0.0 0 8 uschan 0 0 0.0 0.0 0 9 serv flow 0 0 0.0 0.0 0 9 sflog 0 0 0.0 0.0 0 9 cm 0 0 0.0 0.0 0 9 cmtx 0 0 0.0 0.0 0 9 paramset 0 0 0.0 0.0 0 9 DXIF 0 0 0.0 0.0 0 9 sid 0 0 0.0 0.0 0 9 uschan 0 0 0.0 0.0 0
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To display all the SNMP background sync data on Supervisor side or line card side, use the show cable bgsync sync-info cable command as shown in the example below:
Router#show cable bgsync sync-info cable 9/0/1 part1 for srv template: srv_tmp_id min_rate max_rate max_burst 0 0 0 0 1 0 64000 0 2 0 1000000 0 3 0 1000000 3044 4 0 0 3044 5 0 110000000 30000 6 0 0 3044 7 0 2000000000 5000000 8 0 0 3044 part2 for srv flow: sfid prov_qos adm_qos act_qos wb_mode octets pkts delay_pkts drop_pkts gate_id create_time total_active_time 1 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 4 0 0 0 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 6 0 0 0 0 0 0 0 0 0 0 0 7 0 0 0 0 0 0 0 0 0 0 0 8 0 0 0 0 0 0 0 0 0 0 0 9 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 0 0 12 0 0 0 0 0 0 0 0 0 0 0 13 0 0 0 0 0 0 0 0 0 0 0 14 0 0 0 0 0 0 0 0 0 0 0 15 3 3 3 0 0 0 0 0 0 3600 179 16 3 3 3 0 0 0 0 0 0 3600 179 17 3 3 3 0 0 0 0 0 0 3600 179 18 3 3 3 0 0 0 0 0 0 3600 179 19 3 3 3 0 0 0 0 0 0 3600 179 20 3 3 3 0 0 0 0 0 0 3600 179 21 3 3 3 0 0 0 0 0 0 3600 179 22 3 3 3 0 0 0 0 0 0 3600 179 23 3 3 3 0 0 0 0 0 0 3600 179 24 3 3 3 0 0 0 0 0 0 3600 179 25 3 3 3 0 0 0 0 0 0 3600 179 26 3 3 3 0 0 0 0 0 0 3600 179 27 4 5 5 0 8925 42 0 0 0 12700 88 28 6 7 7 3 0 0 0 0 0 12700 88 29 4 5 5 3 3855 21 0 0 0 11500 100 30 6 7 7 3 0 0 0 0 0 11500 100 31 8 8 8 3 222 3 0 0 0 11500 100 32 4 5 5 3 1277 11 0 0 0 12100 94 33 6 7 7 0 0 0 0 0 0 12100 94 34 4 5 5 0 3851 21 0 0 0 12300 92 35 6 7 7 3 0 0 0 0 0 12300 92 36 8 8 8 0 148 2 0 0 0 12100 94 37 4 5 5 0 3855 21 0 0 0 12700 88 38 6 7 7 3 0 0 0 0 0 12700 88 39 8 8 8 3 222 3 0 0 0 12300 92 40 4 5 5 3 3281 20 0 0 0 13100 84 41 6 7 7 3 0 0 0 0 0 13100 84 42 8 8 8 3 222 3 0 0 0 12700 88 43 8 8 8 3 222 3 0 0 0 12700 88 44 4 5 5 3 3308 21 0 0 0 13100 84 45 6 7 7 3 0 0 0 0 0 13100 84 46 8 8 8 3 296 4 0 0 0 13100 84 47 8 8 8 3 296 4 0 0 0 13100 84 48 4 5 5 3 73 2 0 0 0 14500 70 49 6 7 7 3 0 0 0 0 0 14500 70 50 8 8 8 3 74 1 0 0 0 14500 70 part3 for sid sid_entry[1] sid 1 service_class 2 create_time 127 total_octets 8925 sid_entry[2] sid 2 service_class 2 create_time 115 total_octets 3855 sid_entry[3] sid 3 service_class 2 create_time 121 total_octets 1277 sid_entry[4] sid 4 service_class 2 create_time 123 total_octets 3851 sid_entry[5] sid 5 service_class 2 create_time 127 total_octets 3855 sid_entry[6] sid 6 service_class 2 create_time 131 total_octets 3281 sid_entry[7] sid 7 service_class 2 create_time 131 total_octets 3308 sid_entry[8] sid 8 service_class 2 create_time 145 total_octets 73 part4 for cm and cmtx cm_mac: 68ee.9633.0699, tcsbmp: 0x1, admin_status 1, md_sg_id 0x1510505, rcc_status_id 0x4, rcs_id 0x1520005, tcs_id 0x1 last_reg_time 1444372688, RCP ID:00 10 00 00 10 usch 1, modulation_type 2, rx_power -5, signal_noise 390, time_offset 2085 cm_mac: e448.c70c.96e7, tcsbmp: 0x4, admin_status 1, md_sg_id 0x1510505, rcc_status_id 0x4, rcs_id 0x1520005, tcs_id 0x3 last_reg_time 1444372678, RCP ID:00 10 00 00 08 usch 3, modulation_type 2, rx_power -15, signal_noise 381, time_offset 1785 cm_mac: 0019.474a.c126, tcsbmp: 0x1, admin_status 1, md_sg_id 0x1510505, rcc_status_id 0x0, rcs_id 0x22, tcs_id 0x1 last_reg_time 1444372682, RCP ID:00 00 00 00 00 usch 1, modulation_type 2, rx_power -15, signal_noise 390, time_offset 1792 cm_mac: e448.c70c.982b, tcsbmp: 0x1, admin_status 1, md_sg_id 0x1510505, rcc_status_id 0x4, rcs_id 0x1520005, tcs_id 0x1 last_reg_time 1444372685, RCP ID:00 10 00 00 08 usch 1, modulation_type 2, rx_power -10, signal_noise 390, time_offset 1786 cm_mac: e448.c70c.96d5, tcsbmp: 0x2, admin_status 1, md_sg_id 0x1510505, rcc_status_id 0x4, rcs_id 0x1520005, tcs_id 0x2 last_reg_time 1444372688, RCP ID:00 10 00 00 08 usch 2, modulation_type 2, rx_power -15, signal_noise 381, time_offset 1786 cm_mac: e448.c70c.9819, tcsbmp: 0x1, admin_status 1, md_sg_id 0x1510505, rcc_status_id 0x4, rcs_id 0x1520005, tcs_id 0x1 last_reg_time 1444372692, RCP ID:00 10 00 00 08 usch 1, modulation_type 2, rx_power -10, signal_noise 390, time_offset 1789 cm_mac: e448.c70c.980d, tcsbmp: 0x4, admin_status 1, md_sg_id 0x1510505, rcc_status_id 0x4, rcs_id 0x1520005, tcs_id 0x3 last_reg_time 1444372695, RCP ID:00 10 00 00 08 usch 3, modulation_type 2, rx_power -10, signal_noise 390, time_offset 1783 cm_mac: e448.c70c.96f3, tcsbmp: 0x1, admin_status 1, md_sg_id 0x1510505, rcc_status_id 0x4, rcs_id 0x1520005, tcs_id 0x1 last_reg_time 1444372723, RCP ID:00 10 00 00 04 usch 1, modulation_type 2, rx_power 0, signal_noise 420, time_offset 1798 part5 for dxif info ifnum 1 basedata[1][1]: cmstatusindex 2375681, cm_mac 68ee.9633.0699, cm_ip 0x5011961F, cm_ds_if 59881, cm_us_if 204952 cmregmode 2, cmmodultype 2, cmdocmode 2 basedata[1][2]: cmstatusindex 2375682, cm_mac e448.c70c.96e7, cm_ip 0x5011961D, cm_ds_if 59882, cm_us_if 204954 cmregmode 2, cmmodultype 2, cmdocmode 2 basedata[1][3]: cmstatusindex 2375683, cm_mac 0019.474a.c126, cm_ip 0x50119602, cm_ds_if 59914, cm_us_if 204952 cmregmode 2, cmmodultype 2, cmdocmode 2 basedata[1][4]: cmstatusindex 2375684, cm_mac e448.c70c.982b, cm_ip 0x50119612, cm_ds_if 59881, cm_us_if 204952 cmregmode 2, cmmodultype 2, cmdocmode 2 basedata[1][5]: cmstatusindex 2375685, cm_mac e448.c70c.96d5, cm_ip 0x5011960D, cm_ds_if 59881, cm_us_if 204953 cmregmode 2, cmmodultype 2, cmdocmode 2 basedata[1][6]: cmstatusindex 2375686, cm_mac e448.c70c.9819, cm_ip 0x5011961E, cm_ds_if 59881, cm_us_if 204952 cmregmode 2, cmmodultype 2, cmdocmode 2 basedata[1][7]: cmstatusindex 2375687, cm_mac e448.c70c.980d, cm_ip 0x5011961A, cm_ds_if 59882, cm_us_if 204954 cmregmode 2, cmmodultype 2, cmdocmode 2 basedata[1][8]: cmstatusindex 2375688, cm_mac e448.c70c.96f3, cm_ip 0x5011960E, cm_ds_if 59882, cm_us_if 204952 cmregmode 2, cmmodultype 2, cmdocmode 2 part6 uschan for ifnum 1 usport 1 micro_reflections 0 us_snr 390 snmp_sigq_unerroreds 0 snmp_sigq_correcteds 0 snmp_sigq_uncorrectables 0 usport 2 micro_reflections 0 us_snr 381 snmp_sigq_unerroreds 0 snmp_sigq_correcteds 0 snmp_sigq_uncorrectables 0 usport 3 micro_reflections 0 us_snr 390 snmp_sigq_unerroreds 0 snmp_sigq_correcteds 0 snmp_sigq_uncorrectables 0 usport 4 micro_reflections 0 us_snr 0 snmp_sigq_unerroreds 0 snmp_sigq_correcteds 0 snmp_sigq_uncorrectables 0
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To display raw socket interprocess communication (IPC) infrastructure statistics for specified field replaceable unit (FRU), use the show platform software ios slot-id socket statistics command as shown in the example below:
Router#show platform software ios R0 socket statistics 0 --------------------------------------------- Session Slot : 2 Socket FD : 93 Client ID : 0 Message Receive Count : 0 Message Receive Bytes : 0 --------------------------------------------- Session Slot : 2 Socket FD : 93 Client ID : 1 Message Receive Count : 30155 Message Receive Bytes : 1326820 --------------------------------------------- Session Slot : 3 Socket FD : 86 Client ID : 0 Message Receive Count : 0 Message Receive Bytes : 0 --------------------------------------------- Session Slot : 3 Socket FD : 86 Client ID : 1 Message Receive Count : 29611 Message Receive Bytes : 69782901
Configuring Example for SNMP Background Synchronization
The following example shows how to configure SNMP background synchronization:
enable configure terminal cable bgsync active service internal cable bgsync itime 200 cable bgsync ptime 500 exit
Feature Information for SNMP Background Synchronization
Use Cisco Feature Navigator to find information about 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 http://tools.cisco.com/ITDIT/CFN/. An account on http://www.cisco.com/ is not required.
 Note | The below table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature. |
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Feature Name |
Releases |
Feature Information |
|---|---|---|
|
SNMP Background Synchronization |
Cisco IOS-XE Release 3.18.0S |
This feature was introduced on the Cisco cBR Series Converged Broadband Routers. |
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