IPSEC VPN Tunnel Throughput Issue
I have a throughput issue over my IPSEC VPN tunnel between our 200d (5.2) and our 60E (5.6) firewalls.
Site A.
200D
150mbps Up/D
Site B.
60E
100mbps Up/D
I am having throughput issues when sending data from site A LAN only to Site B. A single transfer is only able to reach 10mbps. When running multiple transfers simultaneously, each transfer is able to reach the 10mbps until the 100mbps is reach. When transferring data from Site B to Site A a single transfer is able to fully saturate the 100mbps link as expected. Transferring data from Site B to Site C (MPLS Network) which passes through the vpn tunnel at Site A is able to fully saturate the 100mbps as expected. There seams to be a problem only sending data from Site A. LAN interface to Site B.
At this point I am thinking its the software switch on the LAN interface causing some sort of issue that I cant explain. There are no bandwidth limiters or security features enabled on the VPN policies. The issue started when I had an ISP issue at Site A. Site A actually has two ISPs. During the outage I had temporarily setup the VPN over the secondary ISP which only had 10mbps upload speed. When changing the VPN to the 150mbps circuit the VPN did not regain the bandwidth as expected. Do I need to reboot the 200D firewall to drop the old VPN session or is this something else related to the software switch?
Any help would be appreciated before I start the long and grueling process of disabling the software switch.