B&B Electronics 516TX-A - Manual - Manual (Page 46)

(Revised 8/4/2009) 46
Filters
Note that these filters operate whether IGMP Snooping is enabled or not. These are egress filters.
‘General Broadcast’ frames have a Destination Address of all ones (FF FF FF FF FF FF). The default is that
all ports receive General Broadcast. You can select which ports are to receive General Broadcast, but only if
vlan is not enabled.
At least twelve ( 16 on 524/526) ‘static filters’ are provided. You can use any, all, or none. For each employed, you
will enter an address and the ports that will receive frames with the destination address for that static filter.
Command Description Comment
info Get info on Filters
bfilter Configure Broadcast Filter
Ports Select Ports
sfilter Configure Static Multicast
Filter Select Addresses and
Ports for each
After entering ‘bfilter’, you will be asked to
“Enter ports that are to receive General Broadcast frames:”
After entering ‘sfilter’, you will be asked to enter the
“static multicast filter number (1 ->16)” ( for 524/526)
or “static multicast filter number (1 ->12)” ( for other 500 series products)
and then to
“Enter 12 digit Address (Ex. '01005e0a0a0a'), or all zeroes to disable the group”.
Lastly, you will be asked to
“Enter ports that are to receive on this multicast address”.
Note that the main intent is relative to Multicast Addresses, but other frame Destination Addresses can
technically be used.
Each static filter group can have any or all switch ports in the group. Entering all (12) zeroes as the group
multicast address disables that group, but allows the other groups to function. Multicast Group Addresses
must be in the range of 01 00 5e 00 00 00 through 01 00 5e 7F FF FF. These low order 23 bits of the
Multicast Group Address are the IP host address. Elsewhere, this same IP Multicast Group Address Range is
sometimes expressed as 224.0.0.0 through 239.255.255.255 (dotted quad), but cannot be directly entered into
the switch in that notation.
Note that IGMP Snooping operates dynamically and with or without these static filter entries.
Note that vlan must be disabled before enabling any ‘bfilter’s.
Example of the Filters bfilter screen:
CLI\SWITCH\FILTERS>bfilter
Enter ports that are to receive General Broadcast frames >
Use commas to separate port numbers. (Example: '3,6,12,14,22'.)
Enter Port Numbers (or ESC to exit):1,5,9,12,18,24,26
These ports receive General Broadcast now: 1 5 9 12 18 24 26
CLI\SWITCH\FILTERS>