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Cisco TelePresence MSE 8000 Series

TelePresence Multiparty and Video Conferencing Ping Response and MTU Size Restrictions

Document ID: 117926

Updated: Jul 18, 2014

Contributed by Alex Shaw and Katrina Currie, Cisco Engineering, and Adam Wamsley, Cisco TAC Engineer.

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Introduction

This document describes the maximum number and the Maximum Transmission Unit (MTU) size of the pings to which the Cisco TelePresence Multiparty Conferencing Bridges and Video Conferencing Gateways respond.

Maximum Number and MTU Size of Pings

The Cisco TelePresence Multiparty Conferencing Bridges and Video Conferencing Gateways appear to display significant packet loss when tested with ping floods. The responses from these devices are limited in order to avoid overloads. These limits are applied in the kernel, so they appear cross-product.

This table details the maximum number of pings and the MTU size of the pings to which each device responds:

 DeviceMaximum Ping ResponsesMaximum Size of Ping Responses
Cisco 4200 Series Multipoint Control Unit (MCU)100 pings/second76-byte payload
Cisco 8420 Series MCU
Cisco 4500 Series MCU
Cisco 3200 Series ISDN Gateway (GW)
Cisco 3241 Series ISDN GW
Cisco 8320 Series ISDN GW
Cisco 8321 Series ISDN GW
Cisco 3500 Series IP GW
Cisco 8350 Series IP GW
Cisco 8330 Series Serial GW
Cisco 3200 Series IP Video Conference Recording (VCR)
Cisco 8220 Series IP VCR
Cisco 8050 Series Supervisor
Cisco 5300 Series MCU199 pings/secondNo limit,
MTU-dependent
Cisco 8510 Series MCU
Cisco 8710 Series TelePresence Server (TPS)
Cisco 7010 Series TPS
Cisco 3600 Series Advanced Media Gateway
Updated: Jul 18, 2014
Document ID: 117926