Management Vlans - Cisco WS-C2955T-12 Software Manual

Chapter 8 Configuring VLANs
The switches in
sending VLAN traffic over 100BASE-T and Gigabit Ethernet ports.
The GigaStack GBIC also supports both trunking methods. When you are configuring a cascaded stack
of Catalyst 3500 XL switches using the GigaStack GBIC and want to include more than one VLAN in
the stack, be sure to configure all of the GigaStack GBIC interfaces as trunk ports by using the
switchport mode trunk interface configuration command and to use the same encapsulation method by
using the switchport encapsulation {isl | dot1q} interface configuration command. For more
information on these commands, refer to the switch command reference.
Trunking is supported on all 8-MB switches running Release 12.0(5)XP and later. Trunking is not
supported on some older software releases and on some older Catalyst 2900 XL switches and modules.
For information about which older devices and software releases support trunking, refer to the release
notes for Release 11.2(8)SA6 or earlier
(http://www.cisco.com/univercd/cc/td/doc/product/lan/c2900xl/index.htm).

Management VLANs

Communication with the switch management interfaces is through the switch IP address. The IP address
is associated with the management VLAN, which by default is VLAN 1.
The management VLAN has these characteristics:
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Before changing the management VLAN on your switch network, make sure you follow these
guidelines:
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If you are using SNMP or CMS to manage the switch, ensure that the port through which you are
connected to a switch is in the management VLAN.
For information about the roles management VLANs play in switch clusters, see the
VLAN" section on page
78-6511-08
Table 8-1 support both Inter-Switch Link (ISL) and IEEE 802.1Q trunking methods for
It is created from CMS or through the CLI on static-access, multi-VLAN, and dynamic-access and
trunk ports. You cannot create or remove the management VLAN through Simple Network
Management Protocol (SNMP).
Only one management VLAN can be administratively active at a time.
With the exception of VLAN 1, the management VLAN can be deleted.
When created, the management VLAN is administratively down.
The new management VLAN should not have an Hot Standby Router Protocol (HSRP) standby
group configured on it.
You must be able to move your network management station to a switch port assigned to the same
VLAN as the new management VLAN.
Connectivity through the network must exist from the network management station to all switches
involved in the management VLAN change.
If your cluster includes members that are running a software release earlier than Release 12.0(5)XP,
you cannot change the management VLAN of the cluster. If your cluster includes member switches
that are running Release 12.0(5)XP, you need to change their management VLANs before you use
the Management VLAN window.
Switches running Release 12.0(5)XP should be upgraded to the current software release as described
in the release notes (http://www.cisco.com/univercd/cc/td/doc/product/lan/c2900xl/index.htm).
5-18.
Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
Management VLANs
"Management
8-3