Thats probably because 3750 and 3560s were more thought as edge switches where hsrp wouldnt be configured :) core switches such as 6500's can support upto 256 groups, which sounds a decent number.. not sure how much 4500 or 4900 supports, but they should hopefully be higher than 3750/3560 !!
Taking into consideration that this is a small office, my best bet would be to go with 3750-12 S, looking at both the cost, and features.. Stacking enhances the performance, within the cluster, unlike the 3560 and 4900 switches.. If you think that the office would grow, and need scalability, you can go in for a 6504E with SUP 32, which would cost a bit high, but has its own advantages.. that is a call which we have to make when designing networks :) and its upto you now :)
Like Raj, I too believe the 3750G-12S might be good choice.
Unlike the other 3750 series, the 3750G-12S supports additional SDM templates, with additional resources, to better serve as an aggregation device.
Compared to a small 6500, you get "sup" redundancy (each member switch can run the stack) and power redundancy (each member switch has its own power supply [2nd power feed an option with RPS]) without having to purchase chassis redundant components.
With the stack, you can multi-member etherchannel to other switches.
From a performance perspective, the 3750G-12S provides 17.8 Mpps (per stack member) and a 32 Gbps ring (dual 8 Gbps duplex). For 6500s, classic bus cards are provided 15 Mpps (per chassis) and 32 Gbps bus (16 Gbps duplex?).
I've think so too, but since you can stack 3750s, and the VLAN IP will migrate to a new stack master, Cisco's thinking might be you don't really need them. Probably also why they don't support GLBP (I believe).
Of course, this doesn't help with the 3560 series, but if HSRP groups is an issue there's the 4900 series.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...