My site has two routers on same public segment, share the same internet link. These 2 routers are part of the corporate vpn network and it's running gre tunnel, EIGRP is the routing protocol, both routers already installed vpn acclerator to enhance performance.
Internet | router A (F0/0) ---- Switch ---- router B (F0/0) | | LAN A LAN B
On these two routers, I've create a direct tunnel between them. When I do a ping test from router A external to router B external, the latency is less than 10ms cos they're under same public segment. However, when I do a ping test from router A to router B via gre tunnel, the latency is > 250ms. It's quite unresanable & unacceptable. Could anyone give me a clue why the gre tunnel performance is so bad while two routers are on same network ? Is there any parameter I missed?
Router A Tunnel 1 ip address unnumbered L0 tunnel source interface F0/0 bandwidth 64 delay 1700 ip eigrp 0 30 tunnel destination address 184.108.40.206
Router B Tunnel 1 ip address unnumbered L0 tunnel source interface F0/0 bandwidth 64 delay 1700 ip eigrp 0 30 tunnel destination address 220.127.116.11