Quick Reference Guide

VLANs | 209
• It is possible to set the management VLAN to a VLAN that does not exist. If you cannot reach
anything from the management IP address (see Creating the Management IP Address on page 67),
check the management VLAN using
show interface managementethernet or show running-config.
Implementing VLANs
When an individual port is added to a LAG, any VLAN membership is suspended. However, the
membership is automatically restored when the port is removed from the LAG.
Forwarding Rules
Forwarding rules are based on the following attributes:
• VLAN membership
• Spanning tree state (forwarding)
• Frame type (unicast or multicast)
• Filters
Egress Rules
• Spanning tree state (forwarding)
• VLAN membership
• Untagged frames only forwarded if embedded addresses are canonical
Exempt Frames
• Spanning tree BPDUs
• GVRP BPDUs
• Frames used for control purposes, e.g. LAG PDUs, flow control
Table 14-8. VLAN ID Options
VLAN ID Limitations
0 Reserved for .1p
1 Default VLAN
2 - 3965 Configurable by user
3966 - 4094 Reserved for Layer 3 interfaces
4095 Reserved for Blackhole VLAN
4096 Total VLAN IDs