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Intel® NetStructure™ ZT 8101 10/100 Ethernet Switch User’s Manual 77
Using the Telnet Console
Mirroring Configurations
Incoming or outgoing traffic from any source port can be mirrored for real-time analysis. A logic
analyzer or a RMON probe can then be attached to study the traffic crossing the source port in a
completely unobtrusive manner. When mirroring port traffic, remember these conditions:
• The target port should be operating at the same or higher speed than the source port. If the
target port is operating at a lower speed than the source port, packets will be lost.
• For optimum performance, you should mirror three or fewer ports at any given time.
To configure a port for mirroring
1. From the Main Menu, select Mirroring Configurations and press Enter.
2. Configure these fields.
3. Highlight
APPLY and press Enter.
4. To modify a target port in the table of current settings, enter the port number in the Target Port
field, change the mirror port value, highlight
APPLY, and press Enter.
GMRP
GMRP (Group Multicast Registration Protocol) allows ports to dynamically join multicast groups.
It provides a mechanism that allows bridges and end-stations to dynamically register (and
subsequently, de-register) group membership information with the MAC bridge attached to the
same LAN segment.
To configure GMRP globally
1. From the Main Menu, select GMRP and press Enter.
2. Use the spacebar to toggle the Switch GMRP field to
Enabled or Disabled.
3. Highlight
APPLY and press Enter.
To configure port GMRP settings
1. From the Main Menu, select GMRP and press Enter.
Field Description
Target Port
Specifies the port where information will be duplicated and sent for capture
and network analysis. This is the port where a network analyzer would be
attached to capture packets duplicated from the source (mirrored) port.
Mirrored Port
Specifies which port to mirror and which packets to mirror. This port is the
source of the packets. Use one of these values:
• R—Mirror incoming packet
• T—Mirror outgoing packets
• B—Mirror both incoming and outgoing packets
• - (none)—Do not mirror
Use the spacebar to toggle these values for a specific port. If the port has an
X, this port cannot be selected for mirroring.