Cisco Infrastructure :: How Router Can Talk With AS400 Using SDLC

Mar 23, 2011

to ask a very legacy network technology -  IBM's SNA how it working on TCP.The topology as shown at the attachment  SNA topology.png (backgroup is banking sector)

1. At HQ, AS400 mainframe physically connect to router (with SNA feature license). This router connect to peer router across WAN (for security purpose, built the IPSec tunnel with 3DES encryption).
2. HOW really the router can do SNA ov IP?  how the router can talk with AS400 using SDLC, and then route through using TCP/IP?
3. read on cisco documentation, i just couldn't know what kind of scenario need to use STUN? as well as DLSW+ ? can please guide when to use either STUN or DLSW+?

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 Cisco 1800 ----- int fa0, public ip address ---- Internet
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int vlan3, ip address 10.1.30.1
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