Migrating A Supervisor Engine Ii From A Catalyst 4006 Switch To A Catalyst 4500 Series Switch - Cisco WS-C2950SX-48-SI Configuration Manual

Migrating a Supervisor Engine II from a Catalyst 4006 Switch to a Catalyst 4500 Series Switch

Table 28-2 Power Consumption for Catalyst 4500 Series and 4000 Series Components (continued)
Module
48-port 1000BASE-X Gigabit Ethernet
WS-X4448-GB-LX
48-port Telco 10/100BASE-TX switching module
WS-X4148-RJ21
48-port inline power 10/100BASE-TX switching module
WS-X4148-RJ45V
4-port MT-RJ uplink module
WS-U4504-FX-MT
48-port MT-RJ 100BASE-LX switching module
WS-X4148-FE-LX-MT
48-port 10/100/1000BASE-T switching module
WS-X4548-GB-RJ45
2-port 1000BASE-X (GBIC) Gigabit Ethernet
WS-X4302-GB
Migrating a Supervisor Engine II from a Catalyst 4006 Switch to
a Catalyst 4500 Series Switch
If you migrate a Supervisor Engine II from a Catalyst 4006 switch to a Catalyst 4503 or 4506 switch,
save your configuration and reload the configuration file after you insert the supervisor engine into the
Catalyst 4500 series chassis.
The Catalyst 4006 switch has 1024 MAC addresses that you can use as bridge identifiers; the
Catalyst 4500 series switches have 64 MAC addresses. MAC address reduction is always enabled on the
Catalyst 4500 series switches; however, MAC address reduction may or may not be enabled on a
Catalyst 4006 switch. This might affect the selection of the root bridge after you migrate your supervisor
engine. Here are two scenarios to consider:
•
•
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide
28-10
The Catalyst 4006 switch is not a root switch
In this case, the spanning tree topology does not change. If you add a Catalyst 4500 series switch
with MAC reduction enabled and a default spanning tree bridge ID priority set to 32,768 to the
network, the bridge ID priority of the new switch becomes the bridge ID priority that is added to a
system ID extension. The system ID extension, which is the VLAN number, can vary from 1 to
4094. If the switch is in VLAN 1, the new bridge ID priority will be 32,789. Because 32,769 is
greater than 32,768, this switch cannot become the root switch.
The Catalyst 4006 switch is a root switch
In this case, the spanning tree topology may change. If the other switches in the network are not
running MAC address reduction, the topology will change after you replace the chassis with a
Catalyst 4500 series switch. The bridge ID priority of the new Catalyst 4500 series switch
increments in the same manner as in the previous scenario (bridge ID priority + VLAN number). If
the switch is in VLAN 1, the new bridge ID will be 32,789. Because 32,769 is greater than 32,768,
this switch cannot become the root switch. The network designates a new root switch; the spanning
tree topology also changes to reflect the new root switch.
Chapter 28 Power Management
Power Consumed Power Consumed
During Operation (W) in Reset Mode (W)
90 50
65 40
60 50
10 10
88 10
58 15
35 30
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