Netgear XCM8806 - 8800 SERIES 6-SLOT CHASSIS SWITCH ユーザーズマニュアル

other source switches in the network. Make sure that VLANs meant to carry normal user 
traffic are not configured with a tag used for remote mirroring.

When a VLAN is created with 

remote-tag

, that tag is locked and a normal VLAN cannot 

have that tag. The tag is unique across the switch. Similarly if you try to create a 

remote-tag

 VLAN where 

remote-tag

 already exists in a normal VLAN as a VLAN tag, you 

cannot use that tag and the VLAN creation fails.

Mirroring Rules and Restrictions

This section summarizes the rules and restrictions for configuring mirroring:

When you disable mirroring, all the filters are unconfigured.

To change monitor ports, you must first remove all the filters.

You cannot mirror the monitor port.

The mirroring configuration is removed when you:

Delete a VLAN (for all VLAN-based filters).

Delete a port from a VLAN (for all VLAN-, port-based filters).

Unconfigure a slot (for all port-based filters on that slot).

Any mirrored port can also be enabled for load sharing (or link aggregation); however, 

each individual port of the load-sharing group must be explicitly configured for mirroring. 

The monitor port is automatically removed from all VLANs; you cannot add it to a VLAN.

The mirroring filters are not confined to a single module; they can have ports that span 

multiple modules.

You cannot use the management port at all in mirroring configurations.

With one-to-many mirroring, you need to enable jumbo frame support in the mirror-to port 
and loopback port, if you need to mirror tagged packets of length 1519 to 1522. 

The loopback port is dedicated for mirroring and hence cannot be used for other 

configuration and that is indicated through glowing LED. 

Due to certain restrictions, the following packet types will not be egress mirrored using 

egress VLAN or virtual port-based mirroring:

CPU generated packets

L2 multicast traffic

As traffic approaches line rate, mirroring rate may decrease. Since mirroring makes 

copies of traffic, the bandwidth available will be devoted mostly to regular traffic instead of 
mirrored traffic when the load is high.

Mirroring Examples

Mirroring is disabled by default.   To enable mirroring on a single port, the following command 
can be used:

enable mirroring to port <port-no>