Cisco loopback interface replacement on pfSense?
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 should I use virtual IP as a replacement like Cisco loopback interface IP? 
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 What exactly are you trying to accomplish? 
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 cisco loopback0 for GRE tunnel is useful since it act as logical interface and GRE tunnel source could use loopback0 interface IP. How could I do that on pfsense? 
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 You can add an IP alias VIP on Localhost to get a similar effect 
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 cisco loopback0 for GRE tunnel is useful since it act as logical interface and GRE tunnel source could use loopback0 interface IP. How could I do that on pfsense? Any reason you can't use the standard 127.0.0.1 & ::1 loopbacks? 
- 
 cisco loopback0 for GRE tunnel is useful since it act as logical interface and GRE tunnel source could use loopback0 interface IP. How could I do that on pfsense? Any reason you can't use the standard 127.0.0.1 & ::1 loopbacks? logical interface IP is different than localhost IP, you can't use 127.0.0.1 on GRE tunnel setting. 

