I have to connect about 10 servers for hosted VoIP in a data center environment. We get a 100Mb/s L3 Ethernet drop off (InterNap) and I would have just connected them with a 3560 switch but I need to use about 10 IPSec VPN connections for the SIP traffic.
So far I am considering either ATA 5510 in front of a 2960 switch or ISR 2811 with 16 port switch card. Could anyone comment if the ISR can handle sustained 50-60 Mb/s traffic (about 30Kpps) with firewall features turned on. Would it be better to use the router instead of the ATA / switch combination?