IPsla with or without FHRP?

Hello All,

I have a quick question. I have attached an image on my topology I created in GNS3 which I'm thinking about incorporating into my live network.
This is all for fail-over. I have ESW3 far right configured with IPSla with tracking on. One switch fails, it goes into the secondary. I also have ipsla with tracking on the ASA's far left, same concept, ESW1 fails, it goes to ESW2 and ES1 and 2 are tracking ASA's as well.

I am doing all this without any FHRP's like HSRP or VRRP, etc... and it's working fine, is this a proper way of doing this or should I actually have some kind of FHRP? on ESW1 and 2 I have multiple vlans. So I guess in case a vlan goes down, that's when FHRP would come in handy, other then that I wouldn't need that.

Correct? Suggestions?
2015-09-14_9-46-02.jpg
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Shark AttackNetwork adminAsked:
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JustInCaseCommented:
Well, I am not completely sure what you are trying to achieve, but using IP SLA with tracking inside your network does not make much sense. That's the job for interior routing protocol (RIP, OSPF, EIGRP). Those are much easier to configure and faster to converge.
IP SLA mostly is used on edge routers on your network where you want to test availability of next hop or any other remote location (devices that are not under your jurisdiction). Sure, you can do IP SLA instead routing protocol inside your network, but I guess it is administrative overhead - just try to imagine what pain would be configuring IP SLA if your network grow to 10 or 30 routers.

FHRP have different function, as you already said useful for VLANs, FHRPs are there for L2 redundancy. They are there to provide virtual MAC address for IP address of default gateway (not necessarily virtual) :), so if one default gateway is unavailable other router(s) can still forward traffic instead of unavailable router.
Shark AttackNetwork adminAuthor Commented:
what i want to accomplish is to have a failover system so that when either switch (ESW1 or 2) fails, routers will be re-directed to the available switch out the ASA1 or or 2 depending on availability.  So you're saying  EIGRP or OSPF would serve that purpose the best?
JustInCaseCommented:
YES, that is purpose of internal routing protocols.
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Shark AttackNetwork adminAuthor Commented:
would I need VRRP or HSRP with EIGRP as well?  I configred ESW1 and 2 and 3 for ex with EIGRP but when I drop ESW1 there is o failover. I am assuming i need HSRP? I also have SVI's on the ESW2
JustInCaseCommented:
If your VLANs are ending on ESW1 and ESW2, and if default gateway for VLAN is on those switches then you need FHRP. Function of FHRP is - if primary default gateway is unavailable, other switch take over to be default gateway. Since you say that SVIs are on ESW1 and ESW2 I guess that you need to configure HSRP or VRRP.

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Shark AttackNetwork adminAuthor Commented:
thanks
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