The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
This module describes how to implement RCMD.
Release |
Modification |
---|---|
Release 4.2.0 |
This feature was introduced. |
Route Convergence Monitoring and Diagnostics (RCMD) is a mechanism to monitor OSPF and ISIS convergence events, gather details about the SPF runs and time taken to provision routes and LDP labels across all LCs on the router.
RCMD is a tool that collects and reports data related to routing convergence. Highlights of the RCMD mechanism are:
Lightweight and always-on using route flow markers across routing components (all nodes & MC).
Tracks most convergence events and all routes affected by them.
Provides within-router view with statistics and time-lines on per convergence event basis.
Measurements against time-line/SLA and triggers specified EEM actions on excess.
'On the router' reports via CLI/XML interface.
Each RCMD enabled router provides a digest of convergence data.
The events that are monitored and reported by RCMD are:
OSPF and IS-IS SPF events (default VRF only).
Add/delete of specific external or inter-area/level prefixes.
IGP flooding propagation delays for LSA/LSP changes.
RCMD runs in two modes:
Perform these tasks to configure route convergence monitoring and diagnostics:
1.
configure
2.
router-convergence
3.
collect-diagnostics location
4.
event-buffer-size number
5.
max-events-stored number
6.
monitoring-interval minutes
7.
node node-name
8.
protocol
9.
priority
10.
disable
11.
leaf-network number
12.
threshold value
13.
storage-location
14.
diagnostics directory-path-name
15.
diagnostics-size
16.
reports directory-path-name
17.
reports-size
The Route Convergence Monitoring and Diagnostics (RCMD) prefix monitoring feature enables convergence monitoring for specific individual prefixes in Open Shortest Path First (OSPF) and Intermediate System-to-Intermediate System (IS-IS) Interior Gateway Protocols (IGP). In IGP, when the route information is created, the prefix is verified against the configured prefix-list. If the prefix is found to be monitored, it is marked for monitoring and information about each prefix change event is captured. The RCMD prefix monitoring individually monitors specific prefixes on each RCMD enabled router in the network. A maximum of 10 prefixes can be monitored. Individual prefix monitoring compliments the probes enabled at customer network edges to monitor connectivity and availability of specific service end-points.
The RCMD prefix monitoring for IS-IS prefixes is enabled by configuring the prefix-list command under Router IS-IS monitor-convergence configuration mode. The RCMD prefix monitoring for OSPF prefixes is enabled by configuring the prefix-list command under Router OSPF monitor-convergence configuration mode.
For individual prefix monitoring, the prefixes are marked before those appear for the route calculation so that the monitoring does not affect the convergence of OSPF or ISIS routes.
The Route Convergence Monitoring and Diagnostics (RCMD) OSPF type 3/5/7 link-state advertisements (LSA) monitoring feature flags and differentiates the LSAs during the monitoring of LSAs. A change in route for type 3/5/7 LSAs has to be monitored. During the route calculation, if the route source appears to be type 3/5/7 LSAs and the route change is an add or delete action, then those prefixes have to be monitored. RCMD monitors all deletion of available paths (a purge operation) and addition of the first path (a restoration operation) for all type 3/5/7 LSAs. The OSPF type 3/5/7 LSAs are monitored and reported on a individual prefix basis. However, a modify operation that involves a change in paths not affecting reachability as a whole, is not monitored. Although all prefixes are logged for reporting, the convergence tracking is rate-limited for the first 10 prefixes that are affected in an SPF run.
The RCMD OSPF type 3/5/7 LSA monitoring is enabled by configuring the track-external-routes and track-summary-routes under Router OSPF monitor-convergence configuration mode.
Perform this task to enable individual prefix monitoring for IS-IS prefixes.
To enable monitoring of individual prefixes, first configure a prefix-list using the {ipv4 | ipv6} prefix-list command. Then, use this prefix list with the prefix-list command.
1.
configure
2.
router isis
instance-id
3. address-family {ipv4 | ipv6} [unicast | multicast]
4.
monitor-convergence
5.
prefix-list
prefix-list-name
6.
commit
Perform this task to enable individual prefix monitoring for OSPF prefixes.
To enable monitoring of individual prefixes, first configure a prefix-list using the {ipv4 | ipv6} prefix-list command. Then, use this prefix list with the prefix-list command.
1.
configure
2.
router ospf
ospf-process-name
3.
monitor-convergence
4.
prefix-list
prefix-list-name
5.
commit
ipv6 prefix-list ospf_monitor 10 permit 2001:db8::/32 ! router ospf 100 monitor-convergence prefix-list ospf_monitor
Perform this task to enable RCMD monitoring for type 3/5/7 OSPF LSAs.
1.
configure
2.
router ospf 100
3.
track-external-routes
4.
track-summary-routes
5.
commit
ipv6 prefix-list isis_monitor 10 permit 2001:db8::/32 ! router isis isp address-family ipv6 unicast monitor-convergence prefix-list isis_monitor
ipv6 prefix-list ospf_monitor 10 permit 2001:db8::/32 ! router ospf 100 monitor-convergence prefix-list ospf_monitor
router ospf 100 monitor-convergence track-external-routes track-summary-routes