3Com 3C17705, User Manual

Page: 60 / 184

60 C
HAPTER
3: A
CCESSING THE
S
WITCH
It is recommended that you configure the same duplex and speed
settings for all ports in a load-sharing group.
Do not disable a port that is part of a load-sharing group. Disabling the
port prevents it from forwarding traffic, but still allows the link to
initialize. As a result, a partner switch does receive a valid indication that
the port is not in a forwarding state, and the partner switch will continue
to forward packets.
Verifying the Load
Sharing
Configuration
The screen output resulting from the
show ports configuration
command indicates the ports are involved in load sharing and the master
logical port identity.
Switch 9100
Port-Mirroring
Port-mirroring configures the switch to copy all traffic associated with
one or more ports to a monitor port on the switch. The monitor port can
be connected to a network analyzer or RMON probe for packet analysis.
The switch uses a traffic filter that copies a group of traffic to the monitor
port.
The traffic filter can be defined based on one of the following criteria:
■
MAC source address/destination address — All data sent to or
received from a particular source or destination MAC address is copied
to the monitor port.
For MAC mirroring to work correctly, the MAC address must already be
present in the forwarding database (FDB). For more information on the
FDB, refer to
Chapter 5 .
■
Physical port — All data that traverses the port, regardless of VLAN
configuration, is copied to the monitor port.
■
VLAN — All data to and from a particular VLAN, regardless of the
physical port configuration, is copied to the monitor port.
■
Virtual port — All data specific to a VLAN on a specific port is copied
to the monitor port.
Up to eight mirroring filters and one monitor port can be configured on
the switch. Once a port is specified as a monitor port, it cannot be used
for any other function.
Frames that contain errors are not mirrored.