- Cabletron Systems Remote Access Switch

USER’S GUIDE
144 CyberSWITCH
In example 2, the WAN UnNumbered interface is used to eliminate an unnecessary IP Subnet. The
RLAN interface is unique in that it extends the IP network over the WAN to remote devices which
access the network using a bridge device. Thus it makes a simple bridge device appear to be an IP
router. This is accomplished by having the system extend its Ethernet to handle the ARPs for the
remote bridge.
ISDN
Host
File
Server
128.1.1.8 128.1.1.3
Subnet 128.1.1.0
Interfaces:
LAN Interface 128.1.1.1
RLAN Interface
131.3.3.1
WAN UnNumbered Interface
both WAN Interfaces use
one PRI line
Subnet 193.3.3.0
(Uses UnNumbered WAN Interface)
131.3.3.1
128.1.1.1
Host
Bridge
131.3.3.2
Host
193.3.3.1
193.3.3.3
Subnet 131.3.3.0
(Uses RLAN Interface)
Example 2: LAN, WAN UnNumbered, WAN Remote LAN Interfaces
CSX5500
CSX1200
B25B27
B26B28
WORKGROUP REMOTE ACCESS SWITCH
B29
E1 ONLYB-CHANNELS
LAN
10BASE-TRXTXSERVICE
B31
B30 L1
B21B23
B22B24
B17B19
B18B20
B13B15
B14B16
E1
D
T1
D
B9 B11
B10B12
B5 B7
B6 B8
B1 B3
B2 B4
POWER