Address Group Filter; Port Group Filter - 3Com SUPERSTACK 2200 User Manual

A-12 A A: P
PPENDIX ACKET
Address Group
Filter

Port Group Filter

F O , E
ILTER PCODES XAMPLES
This filter accepts only frames whose source and destination address are in
the same group.
name "Forward Same Source and Destination"
pushSAGM
pushDAGM
and
destination
pushLiteral.l 0
ne
This filter discards all frames sourced from a port in either group three or
eight.
name "Discard Port Groups 3 and 8"
pushSPGM
pushLiteral.l 0x0084
and
pushLiteral.l 0
eq
, S E
AND YNTAX RRORS
# Get source address group mask
# Get destination address group
# mask
# Compare if source and
# groups are common members of
# an address group (result is
# either zero or non-zero)
# address group masks
# Put a zero on the stack
# If not equal, returns a "one"
# to stack, resulting in packet
# forwarded
# Get source port group mask
# Select bits 3 and 8
# If port group bits 3 & 8 are
# common with SPGM, then
# non-zero value is
# pushed onto stack
# Push zero
# Only if SPGM is not in port
# groups corresponding to bits
# 3 & 8, then packet is
# forwarded