BGP Consistency Check not enabled
| Excepción | BGP Consistency Check not enabled |
|---|---|
| Categoria | BGP;IP routing |
| Tipo OS | IOS |
| Riesgo | Medio |
| Descripción | "A BGP route inconsistency with a peer occurs when an update or withdraw is not sent to a peer, resulting in black-hole routing. BGP Consistency checker will check for inconsistencies in a configurable interval. Once the process identifies such an inconsistency, it will report the inconsistency with a syslog message, and optionally take action if the auto-repair keyword is specified. Three options are available:
Next Hop Label Consistency Check:
When two paths have the same next hop because they are advertised by the same provider edge router (PE), they should also have the same next-hop label. If the labels are different, there is an inconsistency. If the auto-repair keyword is specified, the system will send a route-refresh request.
RIB-Out Consistency Check:
If a network passes an outbound policy and is not sent, or if a network does not pass an outbound policy and is sent, there is an inconsistency. If the auto-repair keyword is specified, the system will send a route-refresh request.
Aggregation Consistency Check:
f specific routes and the aggregated route become out of sync, an inconsistency can occur. Either the error-message keyword or the auto-repair keyword will trigger aggregation reevaluation."
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| Acción Correctiva | ! bgp consistency-checker {error-message | auto-repair} [interval minutes] ! error-message :System to generate an error message when an inconsistency is observed. auto-repair : System generates a syslog and also takes an action based on the inconsistency found. interval : Range is from 5 to 1440 minutes. Interval defaults to 1440 (One Day) |
| Advertencia | "This is applicable for IOS
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