We have cisco asa5520 firewall and we have two different isp links now we want to maintain two different networks through this firewall(we want to use two separate gateways through this )Is it possible to do like this.Some body has told me to to do like that firewall has been on multicast mode .So how can i do that ,Any document plz.
Do you want to have One single FW connecting to the 2ISP's or you need Two FW's (context mode) ?
You need to check your requirements because there are some restrictions when you configure the ASA FW in multiple context mode.
Services like VPN, dynamic routing protocols etc won't work.
You can also check this sample configuration on Cisco site for Multiple ISP configuration.
It is called 'multiple context' mode. Here is a sample config:
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