Specifications

ATX Group
ATX MIB Reference Guide 10-35
• entry-reserved = 12, if set then this is a reserved address, and the packets must
be discarded.
• Bits 11-10 are reserved for future expansion.
• Bits 9-0 are reserved.
addrMAC {addr 8}
MAC Address Read-Write
The MAC address for this address definition.
addrPort {addr 9}
Integer Write-Ignore
The port through which this address is connected to the ATX (only valid for
entry-dynamic-local, entry-statistics, and entry-port entries).
addrPortMap {addr 10}
Octet String Read-Write
A bitmap of up to 32 sets of 32 bits each (128 octets), which defines which source
ports are allowed to forward packets to which destination ports (only valid for
entry-static entries). Within each set of four octets, each bit is set if a packet with
a matching destination address may be forwarded to that port. For example, bits
21-2 of the 9th, 10th, 11th, and 12th, octets correspond to ports 21-2 for packets
received by port 2. Since only the ATX’s ports 2 through 21 are available for
bridging, all unused bits (i.e., bits 0,1,and 22 through 31 of every octet
quadruple), as well as the first 8 octets (i.e., the first two octet quadruples), as
well as the last 40 octets (i.e., the octet quadruples for ports 22 through 31), are
meaningless.
addrBridgeMap {addr 11}
Octet String Read-Write
Reserved for ATM, Frame Relay, and SMDS.
addrLeastCount {addr 12}
Obsolete
NOTE
The ATX can store the data most efficiently when the bits within
the octet quadruples are set identically for ports 2 through 21.