Troubleshooting
Unusual Network Activity
None of the devices assigned to one or more VLANs on an 802.1Q
compliant switch are being recognized.
If multiple VLANs are being used
on ports connecting 802.1Q-compliant devices, inconsistent VLAN IDs may
have been assigned to one or more VLANs. For a given VLAN, the same VLAN
ID must be used on all connected 802.1Q-compliant devices.
Link Configured for Multiple VLANs Does Not Support Traffic for One
or More VLANs.
One or more VLANs may not be properly configured as
“Tagged” or “Untagged”. A VLAN assigned to a port connecting two 802.1Q
compliant devices must be configured the same on both ports. For example,
VLAN_1 and VLAN_2 use the same link between switch “X” and switch “Y”.
Switch “Y”
Switch “X”
Link supporting VLAN_1
and VLAN_2
Port X-3
Port Y- 7
VLAN Port Assignment
VLAN Port Assignment
Port VLAN_1
VLAN_2
Port VLAN_1
VLAN_2
X-3 Untagged Tagged
Y-7 Untagged Tagged
Figure C-5. Example of Correct VLAN Port Assignments on a Link
1. If VLAN_1 (VID=1) is configured as “Untagged” on port 3 on switch “X”,
then it must also be configured as “Untagged” on port 7 on switch “Y”.
Make sure that the VLAN ID (VID) is the same on both switches.
2. Similarly, if VLAN_2 (VID=2) is configured as “Tagged on the link port on
switch “A”, then it must also be configured as “Tagged” on the link port
on switch “B”. Make sure that the VLAN ID (VID) is the same on both
switches.
Duplicate MAC Addresses Across VLANs.
The switch operates with mul
tiple forwarding databases. Thus, duplicate MAC addresses occurring on
different VLANs can appear where a device having one MAC address is a
member of more than one 802.1Q VLAN, and the switch port to which the
device is linked is using VLANs (instead of STP or trunking) to establish
redundant links to another switch. If the other device sends traffic over
multiple VLANs, its MAC address will consistently appear in multiple VLANs
on the switch port to which it is linked.
C-21
Содержание ProCurve Series 2810
Страница 1: ...Management and Configuration Guide 2810 www procurve com ProCurve Series 2810 Switches N 10 XX ...
Страница 2: ......
Страница 3: ...ProCurve Series 2810 Switches July 2006 Management and Configuration Guide ...
Страница 56: ...Using the Menu Interface Where To Go From Here This page is intentionally unused 3 16 ...
Страница 98: ...Using the Web Browser Interface Status Reporting Features This page is intentionally unused 5 26 ...
Страница 240: ...Port Trunking Port Status and Configuration This page is intentionally unused 11 26 ...
Страница 320: ...File Transfers Copying Diagnostic Data to a Remote Host PC or Unix Workstation This page is intentionally unused A 24 ...
Страница 350: ...Monitoring and Analyzing Switch Operation Locating a Device This page is intentionally unused B 30 ...
Страница 404: ...MAC Address Management Viewing the MAC Addresses of Connected Devices This page is intentionally blank D 8 ...
Страница 408: ...Daylight Savings Time on ProCurve Switches Configuring Daylight Savings Time This page is intentionally unused E 4 ...
Страница 419: ... This page is intentionally unused ...