What happens to syslog forwarder when internet down

Hi guys, 

I'm just wondering what will happen.Let's say,  I forward syslog from my firewall to kiwi syslog server(Syslog Server A),  and the syslog server is configured to forward syslog to another syslog server(Syslog Server B) via Internet/Ipsec tunnel. If the internet connection is down for 12 hours,  what will happen to the syslogs captured by Syslog Server A during the 12 hours? Will Syslog Server B still get all the 12 hours syslogs when internet connection restored?

Regards,

Muk