HP 600 Series, Services And Applications

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Table C. IP Types of Service
Type of Service (TOS) Delay Throughput Reliability Service Description
0 0 0 0 Default
1 0 0 1 High Reliability
2 0 1 0 High Throughput
4 1 0 0 Low Delay
Figure 7. Routing Different Types of Service
When multiple types of service are supported by HP routers, routing
decisions can be based on the TOS requested in the header of a datagram.
Thus a separate set of routes can be calculated for each IP type of service.
Conceptually, this will allow networks where file transfers (using FTP) can
be routed over high-throughput routes such as satellite circuits, and time-
sensitive data (using Telnet) can be routed over low-delay terrestrial circuits
(see figure 7).
High
Throughput
Shortest Path
(FTP)
Low Delay
Shortest Path
(Telnet)
ROUTER ROUTER
A
p
p
li
c
a
ti
o
n
N
o
te
s
/
C
a
s
e
S
tu
d
ie
s
3
Routing with OSPF
Type-of-Service-Routing
3-83