VPN/RDP problemS

[bsurace]

hi,

forgive me for my poor english and happy new year all !!

here my problem :

LAN1==Server2003RDP1==1Cisco831----Internet----2Cisco831==Server2000RDP2==LAN2

I can use RDP between the two server without pb, I can use RDP between LAN2 and RDP1

but i can't use RDP between lan1 and RDP2.

I used the ping -f -l command to troobleshoot and i enter on the 1cisco the command:

crypto ipsec df-bit clear and then i can use rdp between lan1 and RDP2 but the rdp between

LAN2 and RDP1 now dont works (but the RDP between serveur works in the 2 direction).

i am looking for a "simple" description of what to do when their are MTU problem (because i think its

mtu problem here) in a L2L VPN. i mean do :

ping XXX.XXX.XXX.XXX -l 1460 -f

and

ping XXX.XXX.XXX.XXX -l 1450 -f

When the ping reply :

ip mtu XXXX (does it help ? on what interface ?)

or

ip tcp adjust-mss XXX (does it help ? on what interface ?)

I don't knows if i have been clear, thanks for help

[ebreniz · Accepted solution]

On Cisco routers, use the ip mtu command to adjust the MTU size on the interface where the VPN is terminated. On ASA/PIX devices, use the mtu command to adjust the MTU size in global config mode. Following links may help you

http://www.cisco.com/en/US/products/hw/routers/ps4081/products_tech_note09186a0080094268.shtml

http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a008081e621.shtml