It depends upon the design, if ACE is configured in routed mode then it is compulsory otherwise if teh ACE is configured in one arm mode then the default gateway can be the other switch. Having said that ACE should be able to reach the real servers through the default gateway of ACE.
In Briged mode, clients and severs are part of same IP subnet but you bridge two different vlans i.e. client vlan 10 and server vlan 20. i.e. The same subnet 10.10.10.0/24 is used in both vlans. ACE uses ARP to track which VLANs contains what physical devices. The default gateway for servers is upstream router interface.
In Routed mode, clients and server vlans are part of different IP subnets. The default gateway for servers will be ACE interface connecting to servers. i.e. sever vlan IP subnet 188.8.131.52/24 and client vlan IP subnet 10.10.10.0/24.
In one arm mode, you have only one vlan which connects to switch or router. Since you have 4 GE ports on ACE 4710, you could build port channel between ACE and Switch. ACE is not in directly transit path of all traffic towards servers. Return traffic from servers in response to load balanced request still pass through ACE but requires to use SNAT( Source NAT) and PBR (Policy based routing).
VMware Trunk Port Group is supported from ACI version 2.1
VMM integration must be configured properly
ASA device package must be uploaded to APIC
ASAv version must be compatible with ACI and device package version
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