Here is the question/answer note from Cisco: What is the difference in failover behavior or performance in the Catalyst 6500 between IOS (native) and Catalyst OS + MSFC IOS (hybrid)? Answer: The CatOS (hybrid) High Availability feature synchronizes the protocol states between the active and standby supervisor engines, allowing for supervisor failover to take place in 1~3 seconds. IOS Software (native) Enhanced High System Availability (EHSA or RPR) and Route Processor Redundancy Plus (RPR+) do not synchronize protocol state between the active and standby supervisor engines, allowing for supervisor failover to take place in 30~90 seconds. They key here is that IOS Software (native) links the Supervisor and MSFC together as a unit. Therefore, the failover is a more complex process than with simpler distributed components. The CatOS (hybrid) treats the Supervisor and MSFC separately. White Paper Comparison of the Cisco Catalyst and Cisco IOS Operating Systems for the Cisco Catalyst 6500 Series Switch -Version 2
-----Original Message----- From: David Vital [mailto:[EMAIL PROTECTED] Sent: Friday, August 01, 2003 10:15 AM To: [EMAIL PROTECTED] Subject: RE: FW: Opinions on running Hybrid vs Native mode [7:73342] When you say failover at 2-5 seconds...are you talking about from one Sup mod to another?..or are you talking about convergence in the network? 2-5 seconds makes me think of the sup mods and 90 seconds makes me think of spanning tree. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73351&t=73342 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
