Reference Guide

Interfaces | 391
Figure 20-26. Viewing all Dampened Interfaces
View a dampening summary for the entire system using the command show interfaces dampening
summary from EXEC Privilege mode, as shown in Figure 20-27.
Figure 20-27. Viewing a System-wide Dampening Summary
Clear Dampening Counters
Clear dampening counters and accumulated penalties using the command clear dampening, as shown in
Figure 20-28.
Figure 20-28. Clearing Dampening Counters
Configure MTU size on an Interface
The S6000 supports a link Maximum Transmission Unit (MTU) of 12000 bytes and maximum IP MTU of
9234 bytes. The link MTU is the frame size of a packet, and the IP MTU size is used for IP fragmentation.
If the system determines that the IP packet must be fragmented as it leaves the interface, FTOS divides the
packet into fragments no bigger than the size set in the
ip mtu command.
In FTOS, MTU is defined as the entire Ethernet packet (Ethernet header + FCS + payload)
Since different networking vendors define MTU differently, check their documentation when planing
MTU sizes across a network.
FTOS# show interfaces dampening
InterfaceState Flaps Penalty Half-LifeReuse SuppressMax-Sup
Te 0/0 Up 0 0 5 750 2500 20
Te 0/1 Up 2 1200 20 500 1500 300
Te 0/2 Down 4 850 30 600 2000 120
FTOS# show interfaces dampening summary
20 interfaces are configured with dampening. 3 interfaces are currently suppressed.
Following interfaces are currently suppressed:
Te 0/2
Te 3/1
Te 4/2
FTOS#
FTOS# clear dampening interface Te 0/1
FTOS# show interfaces dampening TengigabitEthernet0/0
InterfaceState Flaps Penalty Half-LifeReuse SuppressMax-Sup
Te 0/1 Up 0 0 20 500 1500 300