Cabletron Systems SmartSTACK ETHERNET ELS10-27, User Manual

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Configuring Your SmartSTACK Ethernet ELS10-27
3-11
Figure 3-1 shows two SmartSTACK Ethernet ELS10-27s connected by
three 100BASE-TX crossover cables. You can connect up to three ports for
sharing the traffic load. The connections must be point-to-point. That is,
there cannot be any other devices on the Ethernet segments.
Figure 3-1. Trunk Connections
Trunk Groups
Each set of connections between two SmartSTACK Ethernet ELS10-27s is
called a
Trunk Group . You can create one Trunk Group, having up to three
ports, to interconnect your SmartSTACK Ethernet ELS10-27s.
Each SmartSTACK Ethernet ELS10-27 determines which ports are part of
which Trunk Group. After Trunk Group conÞguration, the SmartSTACK
Ethernet ELS10-27s complete the standard 802.1D Spanning Tree state
changes, treating each Trunk Group as a single 802.1D Spanning Tree
port.
802.1D Spanning Tree takes about thirty seconds to resolve which
SmartSTACK Ethernet ELS10-27 ports are to become forwarding ports.
As ports within a Trunk Group become forwarding ports, trafÞc within
the Trunk Group is momentarily halted to guarantee the Þrst-in, Þrst-out
ordering of the Ethernet packets.
2X 4X 6X 8X 10X 12X 14X 16X 18X 20X 22X 24X
26
27
RESET
ELS10-27TX
EPIM100
PWR
CPU
ETHERNET SWITCH
25X 26X 27X
10BASE-T/100BASE-TX
COM
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK ST
A
TUS
LINK ST
A
TUS
LINK ST
A
TUS
PORT STATUS MODE
STATUS
TX ACT FDX MON
RX COL 100 USR
2X 4X 6X 8X 10X 12X 14X 16X 18X 20X 22X 24X
26
27
RESET
ELS10-27TX
EPIM100
PWR
CPU
ETHERNET SWITCH
25X 26X 27X
10BASE-T/100BASE-TX
COM
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK
ST
A
TUS
LINK ST
A
TUS
LINK ST
A
TUS
LINK ST
A
TUS
PORT STATUS MODE
STATUS
TX ACT FDX MON
RX COL 100 USR
100BASE-TX Crossover Cables
ELS10-27
(providing 600 Mbps of bandwidth)
ELS10-27