Nortel Networks 2500 Series manual Cascade Down port, Cascade Up port, Connecting stack cables

48Nortel 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