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JUEX-RT-000330 - The Juniper PE router providing Virtual Private LAN Services (VPLS) must be configured to have traffic storm control thresholds on CE-facing interfaces.

Information

A traffic storm occurs when packets flood a VPLS bridge, creating excessive traffic and degrading network performance. Traffic storm control prevents VPLS bridge disruption by suppressing traffic when the number of packets reaches configured threshold levels. Traffic storm control monitors incoming traffic levels on a port and drops traffic when the number of packets reaches the configured threshold level during any one-second interval.

Solution

Configure storm control for each CE-facing interface deploying VPLS bridge domains. Base the suppression threshold on expected traffic rates plus some additional capacity.

Configure a policer to rate limit traffic providing storm control in accordance with organizational requirements.

set firewall policer <policer name> if-exceeding bandwidth-limit <value> burst-size-limit <value>
set firewall policer <policer name> then discard

Configure the filter providing storm control to specify traffic types and rate limit broadcast, multicast, and unknown unicast storms.

set firewall family vpls filter <filter name> term <term name> from traffic-type broadcast
set firewall family vpls filter <filter name> term <term name> then policer <policer name> accept
set firewall family vpls filter <filter name> term <term name> from traffic-type multicast
set firewall family vpls filter <filter name> term <term name> then policer <policer name> accept
set firewall family vpls filter <filter name> term <term name> from traffic-type unknown-unicast
set firewall family vpls filter <filter name> term <term name> then policer <policer name> accept

Apply the storm control filter to all CE-facing instances deploying VPLS bridge domains.

set routing-instances <instance name> forwarding-options family vpls flood input <filter name>

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Juniper_EX_Switches_Y26M01_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5(2), CAT|II, CCI|CCI-001095, Rule-ID|SV-254005r844048_rule, STIG-ID|JUEX-RT-000330, Vuln-ID|V-254005

Plugin: Juniper

Control ID: 3bfc018598c3396d510e42e4d3c9ba1beaac70d051d325cb0a4f20ab97d2012f