8
Forcing the Speed and Duplex Mode
You can manually set the twisted-pair ports on the Managed Media Converter for 10 Mbps or
100 Mbps operation at Half- or Full-Duplex (i.e. 10 Mbps Full-Duplex, 10 Mbps Half-Duplex,
100 Mbps Full-Duplex, etc.).
Selective Advertising
Selective Advertising, when used in combination with Autonegotiation, advertises only the
configured speed and duplex mode for the twisted pair port. If a specific speed and/or duplex
mode are desired, Black Box recommends using Selective Advertising, rather than Force
Mode, when connecting to devices that only use auto-negotiation.
Bandwidth Control
The Managed Media Converter includes bi-directional bandwidth control. This allows you to
independently set the bandwidth limit from the DATA Port to the OPTICS (or UPLINK)
Port and vice versa in a single Managed Media Converter application. In a dual Managed
Media Converter application you can set it from the Host unit to the Remote unit and vice
versa (i.e. the bandwidth on the DATA ports on Host or Remote modules can be limited
independently).
Loopback Testing
For troubleshooting, Managed Media Converter includes Loopback testing functionality. This
option should only be implemented on standalone and remote modules.
Loopback allows looping back of all frames arriving on the OPTICS (or UPLINK) port (except
for the device’s management traffic). When in Loopback mode, the Managed Media
Converter module stops the OPTICS (or UPLINK) port traffic from continuing on out of the
DATA port.
Address Swap
A Layer 2 Ethernet switch will discard all received packets with the same MAC address as sent
packets. To avoid this issue the Loopback feature can swap the source and destination MAC
addresses on the looped data.
Address Swap and Clear Multicast Bit
In addition to swapping the source and destination MAC addresses on the looped data, the
Loopback feature can also be set to clear the multicast bit. This allows the looped data to
avoid being blocked by any multicast settings.
No Learning on OPTICS and DATA Ports
The Loopback feature can be set to disable address learning on the OPTICS (or UPLINK) and
DATA ports. This allows the loopback to be performed without interference from MAC
address filtering functions.
45
4.
Enter a VLAN ID in the
Management Vlan
VLAN IDs field.
5.
Press
S
or
F3
to save the settings.
6.
Type
reboot
.
Now the Managed Media Converter is configured to pass only VLAN ID 13 from the DATA
port to the OPTICS (or UPLINK) port. Untagged packets arriving at the OPTICS (or
UPLINK) port (Tags = N) receive a tag (VLAN ID = 13) before being sent out of the DATA
port. The VLAN ID number used for a port must be different than the number used for the
Management VLAN ID.
ON
S1
1 2 3 4 5 6 7 8 9 0
EXT MGMT port management
DIP switch (1) is set to ON (default).
OPTICS:
Untagged
data
DATA:
VLAN ID=13