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What is the best redundancy method for 6000 MSFC?

Now I use HSRP for 6000 MSFC but someone suggests me to change it to SRM. Do you have any idea about this?


Re: What is the best redundancy method for 6000 MSFC?

Single Router Mode (SRM) is a new feature that addresses the drawback of the previous HSRP based redundancy scheme.

See the following URL for more information on this -

Cisco Employee

Re: What is the best redundancy method for 6000 MSFC?

Each has its own pros and cons. Take a decision weighing each of them against others

Dual MSFC with HSRP


* Need more IP addresses (HSRP)

* If you are using Flex WAN interface, they can be controlled only by the DR

* HSRP Convergence will be faster than SRM mode

* Effective usage of MSFC resource as load sharing is possible



* One IP address is sufficient. no HSRP is required.

* No stateful failover is supported yet. So convergence will depend on RP and other process to initialise

* FlexWAN configuration is simple. They are always attached to either of the MSFC. So no manual config required

* Load sharing is not possible. At a given time, only one SUP/MSFC is used.The other one is dormant waiting to take over if the active one fails

Hope this helps