1 /AGING_TIMER
/AGING_TIMER=value
Sets the amount of time in seconds to age Token Ring source
routing cache entries before marking them stale. This timer
expires when no traffic is sent to or received from the remote
node in this amount of time. The default value is 60 seconds.
Increase this value when idle connections bounce between the
stale and known states. Setting this value too low may cause
unnecessary explorer traffic to traverse the LAN.
2 /CACHE_ENTRIES
/CACHE_ENTRIES=value
Sets the number of entries to reserve for caching Token Ring
source routing address entries. The default value is 200 entries.
If your system directly communicates to a large number of
systems, you may want to increase this number.
3 /CONTENDER
/CONTENDER
/NOCONTENDER (default)
Specifies that the Token Ring device is to participate in
the Monitor Contention process when it joins the ring. The
/NOCONTENDER qualifier, directs the device not to challenge the
current ring server.
4 /DISCOVERY_TIMER
/DISCOVERY_TIMER=value
Sets the number of seconds to wait for a reply from a remote node
when performing the source Token Ring routing route discovery
process. The default value is 2 seconds.
If you have nodes that respond slowly on your extended LAN, you
may need to increase this number to reduce the amount of explorer
traffic that traverses your LAN.
5 /EARLY
/EARLY (default)
/NOEARLY
Enables Early Token Release on the device. The /NOEARLY
qualifier, disables Early Token Release.
6 /MAP
/MAP=(MULTICAST_ADDRESS=address, FUNCTIONAL_ADDRESS=address)
/NOMAP=(MULTICAST_ADDRESS=address)
Maps a standard multicast address to a functional address.
Token ring devices do not support IEEE 802 standard globally
defined group addresses. They do support functional addresses. A
functional address is a locally administered group address that
has 31 possible values. Each functional address sets one bit in
the third through sixth byte of the address and bytes 1 and 2 are
03-00 (C0:00 in bit reversed format).
The /NOMAP=(MULTICAST_ADDRESS=address) qualifier, clears the
mapping established for the specified address.
Specify the functional address as follows:
o The MULTICAST_ADDRESS argument requires a standard 6-byte
multicast address.
o The FUNCTIONAL_ADDRESS argument requires only the last 4
bytes of the functional address (the preceding 03-00 bytes
are automatically prefixed).
o The address variable, given as hexadecimal byte characters
separated by hyphens, specifies the canonical form of the
address. Use a colon as the separator character to indicate
the bit-reversed form of the address.
For example, to map the multicast address CB-00-01-02-03-04 to
the functional address 03-00-00-80-00-00 on the Token Ring device
IRA0, enter the following command:
SET DEVICE IRA0/MAP=(MULTI=CB-00-01-02-03-04,FUNCT=00:01:00:00)
For the default address mapping, see the following table or issue
the command SHOW DEVICE/MAP device-name.
Functional
Multicast Address Address Description
09-00-2B-00-00-04 03-00-00-00-02-00 ISO ALL ES
09-00-2B-00-00-05 03-00-00-00-01-00 ISO ALL IS
CF-00-00-00-00-00 03-00-00-08-00-00 Loopback Assistant
AB-00-00-01-00-00 03-00-02-00-00-00 DNA MOP Dump/Load
AB-00-00-02-00-00 03-00-04-00-00-00 DNA MOP Remote Console
AB-00-00-03-00-00 03-00-08-00-00-00 DNA L1 Routers
09-00-2B-02-00-00 03-00-08-00-00-00 DNA L2 Routers
09-00-2B-02-01-0A 03-00-08-00-00-00 DNA Phase IV Primary Router
AB-00-00-04-00-00 03-00-10-00-00-00 DNA Endnodes
09-00-2B-02-01-0B 03-00-10-00-00-00 DNA Phase IV Prime Unknown
Destination
09-00-2B-00-00-07 03-00-20-00-00-00 PCSA NETBIOS Emulation
09-00-2B-00-00-0F 03-00-40-00-00-00 LAT Service Advertisement
09-00-2B-02-01-04 03-00-80-00-00-00 LAT Service Solicit
09-00-2B-02-01-07 03-00-00-02-00-00 LAT Xwindown Service
Solicit
09-00-2B-04-00-00 03-00-00-04-00-00 LAST
09-00-2B-02-01-00 03-00-00-00-08-00 DNA Name Service
Advertisement
09-00-2B-02-01-01 03-00-00-00-10-00 DNA Name Service Solicit
09-00-2B-02-01-02 03-00-00-00-20-00 DNA Time Service
03-00-00-00-00-01 03-00-00-00-00-01 NETBUI Emulation
03-00-02-00-00-00 03-00-02-00-00-00 RIPL
7 /MEDIA
/MEDIA=value
Selects the type of cable media used to connect the adapter to
the Token Ring Media Access Unit (MAU) for devices that do not
automatically detect this. Acceptable values for this are either
unshielded twisted pair (UTP) or shielded twisted pair (STP). The
default value is STP.
8 /SOURCE_ROUTING
/SOURCE_ROUTING (default)
/NOSOURCE_ROUTING
Enables source routing on the Token Ring device. If you only have
one ring in your LAN or you use transparent bridging, use the
/NOSOURCE_ROUTING qualifier to turn off source routing.
9 /SPEED
/SPEED=value
Sets the speed of the Token Ring LAN.
Valid values are either 4 or 16, indicating 4 megabits per second
or 16 megabits per second. The default value for Token Ring is
16, unless the LAN adapter supports a nonvolatile mechanism for
setting this parameter.
10 /SR_ENTRY
/SR_ENTRY=(LAN_ADDRESS=address, RI=routing-information)
/NOSR_ENTRY=(LAN_ADDRESS=address)
Statically defines a specific source-routed route for a specific
node. The default value is no routes specified. This caching
remains valid while used or until the aging timer expires.
Use this qualifier only as a last resort when isolating
communication failures on extended LAN topologies.
The /NOSR_ENTRY=(LAN_ADDRESS=address) qualifier, clears the
previously defined static source routed route.
The address is a standard 6-byte LAN address (given as
hexadecimal byte characters separated by hyphens), which
specifies the canonical form of the address. Using a colon as
the separator character indicates the bit-reversed form of the
address.
The routing-information is the source routing field, specified as
a series of two-byte hexadecimal characters (each byte separated
by a hyphen). The field consists of a two-byte routing control
field followed by up to 14 two-byte segment identifiers, each
containing the ring number and the bridge number used in the hop.