Harris Stratex Eclipse 4.6 User Manual page 90

Chapter 2. Eclipse Terminals
Figure 2-11.
E1/DS1
trib options
1- 4 10/100Base-T
Using one transport channel, IDU ES supports Ethernet capacities to 98 Mbps (ETSI)
or 100 Mbps (ANSI). Using both channels, IDU ES supports two separate LANs to a
combined Ethernet maximum of 196 Mbps.
Link capacity may be configured to support Ethernet together with E1 or DS1 wayside
tribs, up to a maximum 8 waysides in 1xE1/DS1 increments. For example, a radio
configured for a throughput of 106 Mbps may be used to support:
• 106 Mbps Ethernet using both transport channels and no E1 tribs. The split between
channel (LAN) assignments may be 53/53 Mbps through to 98/8 Mbps.
• 104 Mbps Ethernet and 1xE1, through to 90 Mbps Ethernet and 8xE1.
LANs supported on transport channels C1 and C2 cannot be paralleled without use of
an external switch with L2 link aggregation, as doing so will create an IP loop.
Simple Link With External Switching
While IDU ES provides full layer 2 switch functionality, it can only support a maximum
of four directly connected hosts, which for most office applications is insufficient,
bearing in mind each device on the LAN must be directly connected to its own port on
the switch (star connected).
The solution is provided by a 3rd party industry-standard multi-port layer 2 (L2)
switch, as shown in Figure 2-12
Figure 2-12.
E1/DS1
trib options
Nx LAN
10/100Base-T
ports
When used in this way, the LAN mode and QoS settings would normally be configured
within the external switch, and a single port connection used to the IDU ES.
With just one channel in use (C1 or C2), the maximum Ethernet capacity supported is
98 Mbps (ETSI) or 100 Mbps (ANSI). For this throughput an optimum link solution is
provided by 100 Mbps licensed option.
Higher throughputs are provided by IDU ES 150 and 200 Mbps options, but to make
use of such capacity both IDU ES channels must be used, as shown in Figure 2-13. The
IDU ES is configured for Mixed Mode to support two independent LANs/VLANs on
transport channels C1 and C2, and each is separately ported to the external switch.
Vol. II-2-24
Basic IDU ES Link
IDU ES
C1/C2
LAN ports
IDU ES with External Switch: Single Channel
IDU ES
C1
P1
10/100Base-T
L2
Switch
E1/DS1
IDU ES
C1/C2
trib options
1- 4 10/100Base-T
LAN ports
E1/DS1
IDU ES
C1
trib options
P1
Nx LAN
L2
ports
Switch
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