Cisco Cisco ASR 5000 Guide De Dépannage

Implement Overload Protection for Gateways and
Neighboring Network Elements on the ASR5x00
Series

Document ID: 119196

Contributed by Krishna Kishore DV, Cisco TAC Engineer, and Albert
Zagrobskiy, Cisco Advanced Services.
Jul 24, 2015

Contents

Introduction
Congestion Control for GWs
Network Overload Protection for Ingress GTP−C Message Throttling
Configure Ingress GTP−C Message Throttling
Neighbor Network Element Protection
Network Overload Protection with Diameter Throttling on an S6a Interface
Configure Diameter Throttling on an S6a Interface
Network Overload Protection with Diameter Throttling on a Gx/Gy Interface
Configure Diameter Throttling on a Gx/Gy Interface
Network Overload Protection Through Page Throttling with RLF
Configure Page Throttling with RLF

Introduction

This document describes how to implement the protection features that are available for Gateways (GWs) and
neighboring network elements on the Cisco Aggregated Services Router (ASR) 5x00 Series in order to protect
the overall network performance.

Congestion Control for GWs

Congestion Control is a generic self−protection feature. It is used in order to protect the system against
utilization surges of these resources:

CPU usage on processing cards

•

Memory usage on processing cards

•

When the utilization exceeds the pre−defined thresholds, all of the new calls (Packet Data Protocol (PDP)
activations, Packet Data Network (PDN) session activations) are dropped or rejected, dependent upon the
configuration.

Here is an example that shows how to monitor the overall Data Processing Card (DPC) utilization:

congestion−control threshold system−cpu−utilization 85

congestion−control threshold system−memory−utilization 85

congestion−control policy ggsn−service action drop