This command displays recent decision process history. Phase 1 of the decision process reacts to UPDATE messages received from peers, determining what new routes are accepted and deleting withdrawn routes from the Adj-RIB-In. Phase 2 determines the best path for each destination, updates the BGP route table, and updates the common RIB. Phase 3 is run independently for each outbound update group and determines which routes should be advertised to neighbors in each group. Each entry in the table shows statistics for one phase of the decision process. The table shows the 20 most recent decision process runs, with the most recent information at the end of the table. If a VRF instance is specified, the statistics for communities within the VRF instance are displayed.
| Format | show ip bgp [vrf vrf-name] statistics |
| Mode | Privileged EXEC |
The command displays the following information.
| Parameter | Description |
|---|---|
| Delta T | How long since the decision process was run. hours:minutes:seconds if the elapsed time is less than 24 hours. Otherwise, days:hours. |
| Phase | Which phase of the decision process was run |
| Upd Grp | Outbound update group ID. Only applies when phase 3 is run. |
| GenId | Generation ID of BGP routing table when decision process was run. The generation ID is incremented each time phase 2 of the decision process is run and when there is a change to the status of aggregate addresses. |
| Reason | The event that triggered the decision process to run |
| Peer | Phase 1 of the decision process can be triggered for a specific peer when a peer's inbound routing policy changes or the peer is reset. When phase 1 is run for a single peer, the peer's IP address is given. |
| Duration | How long the decision process took, in milliseconds |
| Adds | The number of routes added. For phase 1, this is the number of prefixes that pass inbound policy and are added to the Accept-RIB-In. For phase 2, this is the number of routes added to the BGP routing table. For phase 3, this is the number of prefixes added to the update group's Adj-RIB-Out. |
| Mods | The number of routes modified. Always 0 for phase 1. |
| Dels | The number of routes deleted. Always 0 for phase 1. |
Example: The following shows example CLI display output for the command.
(R1) # show ip bgp statistics Delta T Phase Upd Grp GenId Reason Peer Duration Adds Mods Dels 29:33:49 3 0 2041 Fwd status chng 34 750 0 500 29:33:40 2 2042 Accept-RIB-In- 59 750 0 500 29:33:28 2 2043 Accept-RIB-In- 10 0 0 250 29:23:40 2 2044 Accept-RIB-In- 32 0 0 1000 29:13:40 3 1 2044 Phase 2 done 48 500 2500 1750 29:02:40 1 2044 Adj-RIB-In+ 21 500 0 0 29:02:01 3 0 2044 Phase 2 done 41 750 0 1250 28:33:40 2 2045 Phase 1 done 32 500 0 28:15:00 1 2045 Adj-RIB-In+ 9 250 0 0 28:14:40 2 2046 Phase 1 done 16 250 0
