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48 Nortel Ethernet Routing Switch 2500 Series stacking
Cascade Down port
The Cascade Down port is used to connect this switch unit to the next unit
in the stack through a stack cable. A connection from this port must be
attached to the Cascade Up port of the next switch in the stack. A return
cable from the Cascade Down port of the last unit must be connected to
the Cascade Up port of the first unit to complete the stack connection.
ATTENTION
Each Nortel Ethernet Routing Switch 2500 series switch is supplied with one
46-cm stack cable to create a stack connection. For stacking three or more units
(maximum 8 units per stack), you need to order the 1.5 or 3 meters stack return
cable (order number AL2518002-E6 and AL2518003-E6, respectively).
Cascade Up port
The Cascade Up port is used to accept a stack cable connection from
an adjacent unit above. A return cable from the Cascade Up port of the
first unit must be connected to the Cascade Down port of the last unit to
complete a stack connection.
ATTENTION
Nortel Ethernet Routing Switch 2500 series switches use tested and certified
Category 5E UTP cables as stack cables. All Nortel branded ERS 2500 series
stack cables are for use with these switches. However, Cat 5E stack cable
connections of up to 100 meters is possible between each ERS 2500 switch but
not officially supported. Using non-Nortel tested and certified stack cables for
such configurations are solely the user’s responsibility should any stack operation
issues occur.
The following illustration demonstrates the proper stack cable crossover
configuration. Failure to use this configuration can result in loss of
connectivity. This example shows a cascade down configuration
Connecting stack cables
Nortel Ethernet Routing Switch 2500 Series
Overview — System Configuration
NN47215-500 (323162-B) 02.02 Standard
4.1 19 November 2007
Copyright © 2007, Nortel Networks
.