Network Assistant And Vty - Cisco Catalyst 4500 Series Software Configuration Manual

Managing a Network Using Cluster
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If your switch cluster contains a Catalyst 4500 series switch, the cluster command switch must also be
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a Catalyst 4500 series switch.

Network Assistant and VTY

Network Assistant uses virtual terminal (VTY) lines to communicate with the cluster command device.
Catalyst 4500 series switches have 5 VTY lines configured by default. Network Assistant can use an
additional 8 lines. You should configure the maximum number of lines (or at least, 8 + 5 = 13) so that
Network Assistant can communicate with the switch and not use VTY lines that might be needed for
Telnet.
You can configure the Catalyst 4500 series switch to support an appropriate number of VTY lines with
the line vty configuration command. For example, the line vty 6 15 command configures the switch to
include 9 VTY lines.
Note If your existing VTY lines have nondefault configurations, you might want to apply those configurations
to the new VTY lines.
Candidate Switch and Cluster Member Switch Requirements
Candidate switches are cluster-capable switches that are not part of a cluster. Cluster member switches
are switches that are currently part of a switch cluster. Although not required, a candidate or cluster
member switch can have its own IP address and password.
The hostname of a candidate should not be in the form [a-zA-Z0-9]-n, where n is 0 to 16. These names
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are reserved.
To join a cluster, a candidate switch must meet these requirements:
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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
16-12
Has 16 VTY lines.
On a Catalyst 4500 series switch, the default is 4 lines. You configure the switch to set the value
to 16.
Is not a command or cluster member switch of another cluster.
Running cluster-capable software and has clustering enabled.
Has CDP version 2 enabled.
Has HTTP server enabled.
Even when HTTP is enabled on the commander switch, communication between the commander
switch and member switch is still carried over HTTP.
Has 16 VTY lines.
Is not a command or cluster member switch of another cluster.
Is connected to the cluster command switch through at least one common VLAN.
Chapter 16 Configuring the Catalyst 4500 Series Switch with Cisco Network Assistant