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Configuring DLSw Services

B-4

Specifying MAC Address Ranges

When you create a ﬁlter that includes a Source or Destination MAC Address

criterion, you specify the MAC Address range in either most signiﬁcant bit (MSB)

or canonical format. Table B-4 lists the address formats to use.

When deﬁning outbound trafﬁc ﬁlters you can specify a MAC address in either

MSB or canonical format, but the default is canonical.

Source Routing Bridge Source MAC Addresses

When specifying Source MAC Source Routing addresses, set the most signiﬁcant

bit (MSB) to one.

For example (Token Ring packets):

1. The Source MAC address to be ﬁltered is 0x40000037450440.

2. Add the First Bit Set MAC Address 0x800000000000.

3. Enter the ﬁlter criteria range as 0xC00037450440.

Bit 0 (the 0x80 bit) of Byte 0 (the leftmost byte) indicates the presence of the

Routing Information Field (RIF). This bit is set to 1 if the RIF ﬁeld is present and

0 if there is no RIF ﬁeld. Keep this in mind if you use a sniffer to analyze packets

for their Source MAC address. For example, a sniffer would decode LAA with the

ﬁrst byte of 40 as 0x400031740001. If the RIF bit is set, the hexadecimal value of

the packet is 0xC00031740001.

Table B-4. Format for Specifying Source-Routing MAC Addresses

Address Type Address Format

PPP MSB

Bay Networks Standard Frame Relay Canonical

Bay Networks Proprietary PPP Canonical

Token Ring MSB

Ethernet Canonical

1 2 ... 189 190 191 192 193 194 195 196 197 198 199 ... 203 204

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