Reference Guide

442 | Interfaces
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View the link dampening configuration on an interface using the command show config, or view
dampening information on all or specific dampened interfaces using the command
show interfaces
dampening
from EXEC Privilege mode, as shown in the following example.
FTOS# show interfaces dampening
InterfaceStateFlapsPenaltyHalf-LifeReuseSuppressMax-Sup
Gi 0/0Up005750250020
Gi 0/1Up21200205001500300
Gi 0/2Down4850306002000120
View a dampening summary for the entire system using the command show interfaces dampening
summary from EXEC Privilege mode, as shown in the following example.
FTOS# show interfaces dampening summary
20 interfaces are configured with dampening. 3 interfaces are currently suppressed.
Following interfaces are currently suppressed:
Gi 0/2
Gi 3/1
Gi 4/2
FTOS#
Clear Dampening Counters
Clear dampening counters and accumulated penalties using the command clear dampening, as shown in
the following example.
FTOS# clear dampening interface Gi 0/1
FTOS# show interfaces dampening GigabitEthernet0/0
InterfaceStateFlapsPenaltyHalf-LifeReuseSuppressMax-Sup
Gi 0/1Up00205001500300
Link Dampening Support for XML
View the output of the following show commands in XML by adding | display xml to the end of the
command:
• show interfaces dampening
• show interfaces dampening summary
• show interfaces interface x/y
Configure MTU size on an Interface
The E-Series supports a link Maximum Transmission Unit (MTU) of 9252 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.