2 firewalls HA connect to 2 Internet circuits for redundancy trough sw

[Bekzod Fakhriddinov]

Hi,

I was asked to implement this: 2 firewalls HA connect to 2 Internet circuits for redundancy trough switch either catalyst or small business switch SG- 500/300/250. I dont like this not-standard setup and  I'd connect firewalls directly to the ISP modem/router BUT ISP modems have only 1 port each , so to make redundancy between HA firewalls we have to use switch... 

Firewalls will have ipsec vpn to other 6 sites and ssl vpn for remote users. 

I am not sure if the switch cpu and memory capable to process traffic, switch will have to tag and untag vlanid for that traffic for both circuits and I think this can overload cpu/memory on the switch and cause drops. Am i wrong? 

What experts think about this? 

[balaji.bandi]

You can connect 2 Different VLAN in the switch, and FW you use different ISP config with respected IP config.

best is use Port-channel with sub-interface tagging with VLAN