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VPN Problem between RV042 & RV082

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by BarryChu, Aug 6, 2006.

  1. BarryChu

    BarryChu LI Guru Member

    Hi Everyone,

    I configured 3 VPN Tunnels to connect 3 networks
    1. Location 1 - Location 2
    2. Location 1 - Location 3
    3. Location 2 - Location 3

    Location 1:
    Router: RV082
    MTU: 1492

    Location 2:
    Router: RV042
    MTU: 1492

    Location 3:
    Router: RV042
    MTU: 1492

    They all shared the same settings, and all the tunnels are successfully connected, I can ping each other.

    But when I tried to access shared files, it is very very slow and almost halt, what's wrong with that?

    Thanks Thanks!
  2. Toxic

    Toxic Administrator Staff Member

    Loc 2 and 3 have the same IP subnet. surely Loc 3 should be ?

    what MTU settings are you using?
  3. DocLarge

    DocLarge Super Moderator Staff Member Member

    Is there a typo between Location 2 and Location 3 with the LAN ip address, because both of them are

  4. BarryChu

    BarryChu LI Guru Member

    Sorry, I typed it wrongly, Loc 3 is
    And I changed the MTU to be 1492 already, any ideas?

  5. jgutz20

    jgutz20 Network Guru Member

    how large are the files your trying to share or is it having problems even browsing. If this slow down is while browsing, are you using network places or sharing via IP address, are you in a domain setting? if no domain at all do you at least have a WINS server setup to help resolve names? what do these sites have for WAN connection? download/upload. how many total clients are we talking about wanting/needing to share files
  6. Toxic

    Toxic Administrator Staff Member

  7. BarryChu

    BarryChu LI Guru Member

    1. Have problems in browsing
    2. Sharing via IP address, no domain
    3. File Sharing now, Web Application later
    4. 6-7 clients (Win XP), 1 server (Win2003)
  8. EricChak

    EricChak Network Guru Member

    try change the "Phase2 Encryption" to NULL and see if this help.
  9. Toxic

    Toxic Administrator Staff Member

    what encryption are you using anyway? DES/3DES/AES?
  10. mpunkeri

    mpunkeri LI Guru Member

    I had the same problem. You need to modify MTU values on your PCs behind the VPNs. Windows should not even try to send larger than 1400 (or something) packets. Search web for changing the MTU on network card...
    This can be verified with ping set size flag (-l) and don't fragment flag (-f) and try different packet sizes. It is somewhere over 1400 where the packets are not going through anymore.

    Are your VPN connections staying up? I'm having problem that the VPN will not come up automatically if tunnel drops for some time, I have to manually press connect-button in both ends.
    I have one RV082 to four RV042 and I'm fighting with those tunnels! I have networks with SX41/VP41 and they are working fine. Those *#¤& RV machines are the pain in the ass because the tunnels are dropping and not coming up automatically...
  11. Toxic

    Toxic Administrator Staff Member

    you can test the MTU on your system by using TCPOptimizer (available in the Downloads section here)

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