29.6.8 Verifying Route Flap Dampening

<Structure of this section>

(1) List of operation commands

The following table describes the operation commands for the route flap dampening facility.

Table 29-26: List of operation commands
Command name	Description
show ipv6 route	Displays routing information stored in the routing table.
show ipv6 bgp	Shows information about the BGP4+ protocol.
clear ipv6 bgp	Removes the suppressed status of a suppressed route and clears route flap statistics.

(2) Verifying Route Flap Dampening

To display routes suppressed by route flap dampening, use the show ipv6 bgp operation command with the dampened-routes parameter (only for the global network) specified.

Figure 29-33: Result of executing show ipv6 bgp command (specifying dampened-routes parameter)
>show ipv6 bgp neighbors 3ffe:172:16:2::2 dampened-routes Date 20XX/10/29 18:08:54 UTC Status Codes: d dampened, h history, * valid, > active Network Peer Address ReUse d 3ffe:172:21:211::/64 3ffe:172:16:2::2 00:07:11 d 3ffe:172:21:212::/64 3ffe:172:16:2::2 00:19:10

Figure 29-33: Result of executing show ipv6 bgp command (specifying dampened-routes parameter)

>show ipv6 bgp neighbors 3ffe:172:16:2::2 dampened-routes
Date 20XX/10/29 18:08:54 UTC
Status Codes: d dampened, h history, * valid, > active
   Network                                      Peer Address
     ReUse
 d 3ffe:172:21:211::/64                         3ffe:172:16:2::2
     00:07:11
 d 3ffe:172:21:212::/64                         3ffe:172:16:2::2
     00:19:10

To display the flap state of the routes, use the show ipv6 bgp operation command with the flap-statistics parameter (only for the global network) specified.

Figure 29-34: Result of executing show ipv6 bgp command (specifying flap-statistics parameter)
>show ipv6 bgp flap-statistics Date 20XX/10/29 18:08:54 UTC Status Codes: d dampened, h history, * valid, > active Network Peer Address Flaps Duration ReUse Penalty d 3ffe:172:21:211::/64 3ffe:172:16:2::2 114 00:12:30 00:07:11 5.0 d 3ffe:172:21:212::/64 3ffe:172:16:2::2 108 00:12:30 00:19:10 4.0 h 3ffe:172:27:119::/64 3ffe:192:168:2::2 2 00:11:20 1.7 h 3ffe:172:27:191::/64 3ffe:192:168:2::2 2 00:11:20 1.7 > 3ffe:172:30:189::/64 3ffe:192:168:79:188 1 00:05:10 0.6 > 3ffe:172:30:192::/64 3ffe:192:168:79:188 3 00:05:10 0.6 >

Figure 29-34: Result of executing show ipv6 bgp command (specifying flap-statistics parameter)

>show ipv6 bgp flap-statistics
Date 20XX/10/29 18:08:54 UTC
Status Codes: d dampened, h history, * valid, > active
   Network                                      Peer Address
          Flaps      Duration ReUse    Penalty
 d 3ffe:172:21:211::/64                         3ffe:172:16:2::2
          114        00:12:30 00:07:11 5.0
 d 3ffe:172:21:212::/64                         3ffe:172:16:2::2
          108        00:12:30 00:19:10 4.0
 h 3ffe:172:27:119::/64                         3ffe:192:168:2::2
          2          00:11:20          1.7
 h 3ffe:172:27:191::/64                         3ffe:192:168:2::2
          2          00:11:20          1.7
*> 3ffe:172:30:189::/64                         3ffe:192:168:79:188
          1          00:05:10          0.6
*> 3ffe:172:30:192::/64                         3ffe:192:168:79:188
          3          00:05:10          0.6
>