전력통신
scada용 fep을 lan으로 마이그레이션
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2006. 12. 28. 22:06
USING CISCO SOLUTIONS AS A FEP ALTERNATIVE
To what extent can a Cisco router replace a FEP? The first, and most basic, function of a FEP is to offload the work of handling serial
connections. Cisco routers do an excellent job of terminating SDLC or Frame Relay serial connections of any speed, and then passing that
traffic across a channel to the mainframe. Cisco routers also handle LAN connections very well, usually Token Ring, using Logical Link
Control, type 2 (LLC2) as the data link control layer protocol and terminating LLC2 with either DLSw+ or directly on a channel adapter. The
second most important function of FEPs, SNA routing, is handled by Cisco SNA Switching Services (SNASw). Beyond these basic FEP
functions, some of the 200 plus other functions can be replaced by some of the 400 plus functions of the Cisco IOS� Software.
Cisco has two primary designs for FEP migration: channel-attached router (Cisco 7500 Series with CIP or Cisco 7200 Series with ECPA4) or
Gigabit Ethernet-attached switches (Cisco 6500 Series with IBM OSA-Express). Both types of mainframe connectivity work in conjunction
with Cisco IOS-based features such as SNASw and DLSw+ to provide similar features and functions of the IBM 3745/3746 FEP.
fep-migration.pdf
To what extent can a Cisco router replace a FEP? The first, and most basic, function of a FEP is to offload the work of handling serial
connections. Cisco routers do an excellent job of terminating SDLC or Frame Relay serial connections of any speed, and then passing that
traffic across a channel to the mainframe. Cisco routers also handle LAN connections very well, usually Token Ring, using Logical Link
Control, type 2 (LLC2) as the data link control layer protocol and terminating LLC2 with either DLSw+ or directly on a channel adapter. The
second most important function of FEPs, SNA routing, is handled by Cisco SNA Switching Services (SNASw). Beyond these basic FEP
functions, some of the 200 plus other functions can be replaced by some of the 400 plus functions of the Cisco IOS� Software.
Cisco has two primary designs for FEP migration: channel-attached router (Cisco 7500 Series with CIP or Cisco 7200 Series with ECPA4) or
Gigabit Ethernet-attached switches (Cisco 6500 Series with IBM OSA-Express). Both types of mainframe connectivity work in conjunction
with Cisco IOS-based features such as SNASw and DLSw+ to provide similar features and functions of the IBM 3745/3746 FEP.
1167311206_fep-migration.pdf fep-migration.pdf