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Cisco TelePresence MCU 4200 Series

Maximum TTL and hop number supported by an MCU

What is the max TTL value and hop number that Cisco TelePresence MCUs support for H.323 communication?

The TTL (Time To Live) in the IP header of outgoing H.323 messages sent by the Cisco TelePresence MCU is 64 seconds. This gives a maximum hop count of 64 (bearing in mind that some routers may decrease the remaining hop count by more than 1).

This article applies to the following products:

  • Cisco TelePresence MCU 4200 / MSE 8420
  • Cisco TelePresence MCU 4500
  • Cisco TelePresence MSE 8510 blade

May 2nd, 2011 TAA_KB_132