Preset attributes are similar to characteristics, in that their
    values control the way in which the routing module operates.
    However, unlike characteristics, you cannot alter preset
    attribute values using the set command.

                                   NOTE

       These characteristics are preset attributes. They should
       only be set by an expert.

 o  broadcast lsp transmission interval

    Support: L1,L2
    Default: 33            Value: 1-65535

    Interval, in milliseconds, between the transmission of Link State
    Packets (LSPs) on a broadcast circuit.

 o  complete snp interval

    Support: L1,L2
    Default: 10            Value: 1-600

    Interval, in seconds, between generation of Complete Sequence
    Number Packets (SNPs) by a designated router on a broadcast
    circuit.

 o  default es hello timer

    Support: All
    Default: 600           Value: 1-65535

    Value to be used for the current suggested Hello timer, in the
    absence of any suggested value from the intermediate system (IS).

    On routers, this is the value to be suggested when the router is
    not required to poll the ES configuration. In routers, this value
    is suggested by the Suggested ES Configuration Timer option in IS
    Hellos.

 o  dr isis hello timer

    Support: L1,L2
    Default: 1             Value: 1-65535

    Interval, in seconds, between the generation of IS-IS Hello PDUs
    by the designated router.

 o  es cache holding time

    Support: End
    Default: 600           Value: 1-65535

    Holding time, in seconds, for an entry in the node's end-node
    cache database.

 o  es cache width

    Support: End
    Default: 3             Value for Tru64 UNIX: 1-4294967295
    Default: 3             Value for OpenVMS: 1-65535

    Maximum number of LAN address entries in the node's end-node
    cache database on a broadcast circuit.

 o  holding multiplier

    Support: All
    Default: 3             Value: 2-63

    Value by which to multiply the Hello timer to obtain the holding
    timer value for ES and IS Hellos and for point-to-point, router-
    to-router Hellos.

 o  inactive selector

    Support: All
    Default: 33            Value: 2-255

    This is the selector value identifying the port to which incoming
    Inactive Subset PDUs are to be sent.

 o  initialization timer

    Support: All
    Default: 6             Value: 1-63

    Delay, in seconds, between initialization of a data link and
    sending a DECnet-Plus message on a DDCMP circuit.

 o  isis format

    Support: L1,L2
    Default: 0 (ISO)       Value: (ISO) or 1 (DNA Private)

    This attribute controls the protocol identification to be
    used for "DNA Private" PDUs. On broadcast circuits, this
    characteristic also controls the SAP on which they are
    transmitted.

 o  isis holding multiplier

    Support: L1,L2
    Default: 10            Value: 2-63

    Value by which to multiply the ISIS Hello timer to obtain the
    value of the holding timer for LAN level 1 and level 2 router-to-
    router Hellos.

 o  maximum age

    Support: L1,L2
    Default: 1200          Value: 1-65535

    Number of seconds before an LSP is considered to be expired.

 o  maximum lsp generation interval

    Support: L1,L2
    Default: 900           Value: 60-900

    Maximum interval, in seconds, between link state packets (LSPs)
    generated by this node.

 o  minimum lsp generation interval

    Support: L1,L2
    Default: 30            Value: 1-65535

    Minimum time, in seconds, between generation of LSPs by this
    node.

 o  minimum lsp transmission interval

    Support: L1,L2
    Default: 5             Value: 5-30

    Minimum interval, in seconds, between retransmissions of an LSP.

 o  multicircuit es hello timer

    Support: End
    Default: 10            Value: 1-65535

    Value to be used for the current suggested Hello timer on a
    multicircuit end node with more than one circuit enabled, in
    the absence of any suggested values from the IS.

 o  originating L1 lsp buffer size

    Support: L1,L2
    Default: 1492          Value: 128-1492

    Maximum size of level 1 LSPs and SNPs originated at this node.

 o  originating L2 lsp buffer size

    Support: L2
    Default: 1492          Value: 128-1492

    Maximum size of level 2 LSPs and SNPs originated at this node.

 o  partial snp interval

    Support: L1,L2
    Default: 2             Value: 1-65535

    Minimum interval, in seconds, between sending partial SNPs.

 o  poll es hello rate

    Support: All
    Default: 50            Value: 1-65535

    Interval, in seconds, between ES Hellos when a router requires to
    poll the ES configuration.

 o  queue threshold

    Support: L1,L2
    Default: 1             Value: 1-63

    Average queue length at a router, above which the "congestion
    experienced" bit will be set in a forwarded data PDU.

 o  waiting time

    Support: L1,L2
    Default: 60            Value: 1-65535

    Delay, in seconds, between routing databases being in the waiting
    state and entering the on state.

 o  zero age lifetime

    Support: L1,L2
    Default: 60            Value: 1-65535

    Time, in seconds, for which the purge header of an expired LSP is
    retained.