gated.conf.4 (2010 09)

g
gated.conf(4) gated.conf(4)
which bits of the destination are significant. Except when used in a route filter, GateD only supports
contiguous masks.
mask length
The number of significant bits in the mask.
metric
One of the units used to help a system determine the best route. Metrics may be based on hop
count, routing delay, or an arbitrary value set by the administrator depending on the type of routing
protocol. Routing metrics may influence the value of assigned internal preferences. (See preference.)
This sample table shows the range of possible values for each routing protocol metric and the value
used by each protocol (See Protocol Overview.) to reach a destination.
SAMPLE ROUTING PROTOCOL METRICS
Protocol Metric Represents Range Unreachable
-------- ----------------- ----- -----------
RIP distance (hop-count) 0-15 16
HELLO delay (milliseconds) 0-29999 30000
OSPF cost of path 0-????? Delete
ISIS cost of path 0-254 Delete
EGP distance (unused) 0-65535 255
BGP unspecified 0-65534 65535
multiaccess networks
Those physical networks that support the attachment of multiple (more than two) routers. Each pair
of routers on such a network is assumed to be able to communicate directly.
natural mask
The format of an IP address contains the network address and the host address. The natural mask
is a default value applied to the 3 class addresses:
0xff000000 for class A (network.host.host.host),
0xffff0000 for class B (network.network.host.host) and
0xffffff00 for class C (network.network.network.host).
neighbor
Another router which with implicit or explicit communication is established by a routing protocol.
Neighbors are usually on a shared network, but not always. This term is mostly used in OSPF and
EGP. Usually synonymous with peer.
neighboring routers
Two routers that have interfaces to a common network. On multiaccess networks, routers are
dynamically discovered by the OSPF HELLO protocol.
network
Any packet-switched network. A network may be specified by its IP address or network name. The
host bits in a network specification must be zero. Default may be used to specify the default network
(0.0.0.0).
network
The IP address of a network. Usually specified as a dotted quad, one to four values in the range of 0
to 255 inclusive separated by dots (.). For example 132.236.199 , 132.236 or 10. It may also be
specified as a hexadecimal string preceded by 0x with an even number of digits between two and
eight. For example 0x?????? , 0x???? or 0x0a. Also allowed is the symbolic value default
which has the distinguished value 0.0.0.0, the default network. If options noresolv is not
specified, a symbolic network name can be used, for example nr-tech-prod , cornellu-net and
arpanet. The numeric forms are much preferred over the symbolic form.
number
A positive integer.
OSPF
Open Shortest Path First
One of a class of interior gateway protocols, described in more detail in the OSPF section of the Pro-
tocol Overview.
ospf_area
peer
Another router which with implicit or explicit communication is established by a routing protocol.
52 Hewlett-Packard Company 52 HP-UX 11i Version 3: September 2010