V-255969

Discussion

Denial of service is a condition when a resource is not available for legitimate users. Packet flooding distributed DoS (DDoS) attacks are referred to as volumetric attacks and have the objective of overloading a network or circuit to deny or seriously degrade performance, which denies access to the services that normally traverse the network or circuit. Volumetric attacks have become relatively easy to launch by using readily available tools such as Low Orbit Ion Cannon or by using botnets. Measures to mitigate the effects of a successful volumetric attack must be taken to ensure that sufficient capacity is available for mission-critical traffic. Managing capacity may include, for example, establishing selected network usage priorities or quotas and enforcing them using rate limiting, Quality of Service (QoS), or other resource reservation control methods. These measures may also mitigate the effects of sudden decreases in network capacity that are the result of accidental or intentional physical damage to telecommunications facilities (such as cable cuts or weather-related outages). Satisfies: SRG-NET-000193-L2S-000020, SRG-NET-000362-L2S-000024, SRG-NET-000512-L2S-000001

Check Content

Verify the Arista MLS switch is configured for storm-control on applicable Ethernet interfaces.

switch#show storm-control
Port          Type  Level Rate(Mbps)   Status      Drops Reason
Et10/2         all     75       7500   active          0
Et4   multicast     55       5500   active          0
Et4   broadcast     50       5000   active          
switch#

If the Arista MLS switch is not configured to implement a storm-control policy, this is a finding.