Management Vlans - Cisco Catalyst 2950 Software Configuration Manual
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Also See for Catalyst 2950:
- Configuration manual (710 pages) ,
- Command reference manual (686 pages) ,
- Software configuration manual (674 pages)
Table of Contents
Chapter 13
Configuring VLANs
VLANs are identified with a number from 1 to 4094 when the enhanced software image is installed and
1 to 1005 when the standard software image is installed. VLAN IDs 1002 through 1005 are reserved for
Token Ring and FDDI VLANs. VTP only learns normal-range VLANs, with VLAN IDs 1 to 1005;
VLAN IDs greater than 1005 are extended-range VLANs and are not stored in the VLAN database. The
switch must be in VTP transparent mode when you create VLAN IDs from 1006 to 4094.
The switch supports per-VLAN spanning tree (PVST) with a maximum of 64 spanning-tree instances.
One spanning-tree instance is allowed per VLAN. See the
VLANs" section on page 13-7
number of VLANs. The switch supports IEEE 802.1Q trunking for sending VLAN traffic over Ethernet
ports.
Note
The Catalyst 2950 switches do not support Inter-Switch Link (ISL) trunking.
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 role management VLANs play in switch clusters, see the
VLAN" section on page
78-11380-04
It is created from CMS or through the CLI on static-access, 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 a 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.
On switches running a IOS software version that is earlier than Cisco IOS 12.0(5)XP, you cannot
change the management VLAN. Switches running Cisco IOS 12.0(5)XP should be upgraded to the
current software release as described in the release notes.
6-20.
for more information about the number of spanning-tree instances and the
Catalyst 2950 Desktop Switch Software Configuration Guide
Understanding VLANs
"Configuration Guidelines for Normal-Range
"Management
13-3
Table of Contents
Troubleshooting
