Scan ports to see which ones are sending most traffic If any of the ports sustain a traffic rate above the CpUtilRate threshold and the PortMinCong Timer expires Shutdown the ports which exceed their threshold + sends alarm
© 2015 Avaya Inc. All rights reserved. 60 CP Overload Protection Feature Overview – VSP 4000/7200/8000 Software Queue 16 CPU Queues Port … Port CP FP Hardware Assist to protect CP from getting overloaded with Packet Processing CPU Queue Meters : Limit traffic to CP based on classified protocols Prevents one protocol from storming the CP impacting all other protocols non- IP traffic (ISIS, VLACP, CFM, IST,…) – 9 CPU queues (Q15 - Q8 & Q0) IP traffic (VRRP,ICMP,OSPF,BGP,…) – 7 cos queues (Q7 - Q1) Control traffic queues cannot be configured, modified to displayed. CP-limit cannot be configured on port
© 2015 Avaya Inc. All rights reserved. 61 CP Overload Protection Feature Overview – VSP 9000 Software Queue Protocol Meter Port … Port CP SmartMAC Hardware Assist to protect CP from getting overloaded with Packet Processing and DoS attacks Port meters limit the number of packets going to CPU from a particular port. Port meter values can be modified using the cp-limit command. Smart Mac classifies packets to an internal protocol value (ISIS, VLACP, OSPF, BGP, …). Protocol Meters limit the number of packets from a particular protocol. These are not user configurable and are based on scaling numbers. Out of profile packets are dropped Priority Queues have a packet per second threshold. If exceeded, it flow controls all the way to the Fabric Access Device on the IO card. Hardware Credit mechanism provides bounded latency to service real-time control traffic under congestion and also provides weighted-fair bandwidth allocation among control packet classes of service. 8 Priority Queues Credits
© 2015 Avaya Inc. All rights reserved. 62 Broadcast / Multicast Port Rate Limiting Feature Overview • Enable Rate Limiting on the edge access ports to protect from broadcast/multicast storms • Protects against non-CPU bound traffic • Must understand multicast and broadcast traffic in the network before enabling rate limiting • ERS Implementation • Broadcast / Multicast Rate limiting allows the user to configure the allowed amount of bcast/mcast traffic on a port. When traffic exceeds this threshold, it is dropped. • ERS 2500 / 3500 / 4000 / 5000, VSP 7000 • 1 – 10% of port speed • Recommendation 10% • ERS 8300 • 1-100% of port speed • Recommendation 10% • VSP 9000 / ERS 8800/8600 (legacy, E-series, M-series modules) • Broadcast / multicast rate limiting • Allowed rate is in packets per second (pps) • Recommendation 3 times normal pps • ERS 8800/8600 (R-series, RS-series modules) • Broadcast / multicast bandwidth limiting • Allowed rate is in kbps • Recommendation 3 times normal kbps Edge Switch Server Rate Limiting Enabled
© 2015 Avaya Inc. All rights reserved. 63 Multicast and Switch Clustering Supported Configurations & Features • PIM-SM with Switch Clustering is supported on: • ERS 8800/8600/8300 (SMLT/SLT/RSMLT) • VSP 9000 (SMLT/SLT/RSMLT) • PIM-SM is NOT supported on the ERS 5000 Switch Cluster.
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- Fall '19
- Vsp, Avaya, Avaya Inc