IP Event Dampening on switchports

[jmandersson]

Hi Experts!

Does IP Event Dampening have any effect on the routing if its configured under a switchport?

Like this:    

     interface GigabitEthernet1/0/6

     switchport trunk encapsulation dot1q

     switchport trunk allowed vlan 10-200

     switchport mode trunk

     dampening 30 100 1000 180

Some of the vlans configured on the trunk is configured with OSPF

#sh dampening interface

1 interfaces are configured with dampening.

No interface is being suppressed.

Features that are using interface dampening:

  IP Routing

  HSRP

#sh interfaces dampening

GigabitEthernet1/0/6

  Flaps Penalty    Supp ReuseTm   HalfL  ReuseV   SuppV  MaxSTm    MaxP Restart

      5    1574   FALSE       0      30     100    1000     180    6400       0

Thanks,

Johan

[daniel.dib · Accepted solution]

No, it is only used on interfaces with IP address configured to suppress routing updates if an interface is flapping.

It would only be active if you configured no switchport and put an IP address on it.

Daniel Dib
CCIE #37149

Please rate helpful posts.

[jmandersson]

Hej Daniel,

So even that I get these logs, the routing is not affected?

CET: %IFDAMP-5-UPDOWN: interface GigabitEthernet1/0/6 update IP Routing state to DOWN, interface is suppressed

But I guess I should remove the dampening from our switchports...

Tack,

Johan

[daniel.dib]

Yeah, remove it from the switchports.

The state would always be DOWN since IP is not active on it. In my opinion you should not be able to configure it on an interface that is not running IP.

Daniel Dib
CCIE #37149

Please rate helpful posts.