3Com 4.2.2 manual Indications in the Vlan Map, Indications in the Backbone and Services Window

Virtual LANs Level Troubleshooting 6-5

Table 6-5Color Key for Virtual LANs Icons

	Normal	Device operating normally.
Segment	Major	The device connecting this
		segment does not respond
		to SNMP.
	Brown	The first segment on the
		device may appear in this
		status. All other segments on
		the device are operating
		normally.
	Unknown	Device (all segments)
		operating normally.

Identifying VLAN After the redundancy in the LAN Emulation Server has taken effect, the Splits LAN Emulation Clients (LECs) are moved to the backup services. There

may be circumstances where some of the LAN Emulation Clients (LECs) remain connected to the primary LAN Emulation Server (LES) and are not moved to the backup LES. This condition creates a VLAN (ELAN) split. The VLAN split is caused because several LAN Emulation Clients (LECs) belonging to the same ELAN are bound to different LAN Emulation Servers. The split may occur when a LAN Emulation Server(LES) fails and the NMS changes the LAN Emulation Configuration Server database.

Indications in the VLAN Map

You can see the indication of the VLAN split in the VLAN Map when the icon for the primary VLAN (ELAN), with respect to the backup, is still green. This condition indicates that LAN Emulation Clients are still attached.

Under normal circumstances only one ELAN either primary or backup, should be green.

Indications in the Backbone and Services Window

You can see the indication of a VLAN split in the Backbone and Services window as different LAN Emulation Clients (LECs), belonging to the same ELAN, are bound to both the primary and backup LAN Emulation Server (LES) of an ELAN.