HP 7102dl - ProCurve Secure Router Configuration Manual page 754

IP Routing—Configuring RIP, OSPF, BGP, and PBR
Configuring RIP
15-28
Destination IP Address
10.5.0.0 255.255.0.0
With route summarization, an interface can broadcast:
Destination IP Address
10.0.0.0 255.0.0.0
Route summarization is particularly useful for limiting the amount of band-
width routers consume with RIP updates. It also limits the memory the routing
table occupies.
If you are using RIP version 1 or you have enabled auto-summary, RIP
summarizes routes whenever they are advertised across network boundaries.
For example, Router A in Figure 15-4 can advertise network 10.0.0.0 /8 to
Router B rather than networks 10.1.1.0 /24 and 10.1.2.0 /24, because Router A
and B connect through a subnet on a different classful network (1.1.1.0 /30).
By default, route summarization is disabled. You can enable it by entering this
RIP configuration mode command:
ProCurve(config-rip)# auto-summary
RIP must always summarize up to the classful boundary. This can be a problem
for WANs using subnets in the same classful network at different sites. When
a WAN includes non-contiguous subnets, the same route will not be accurate
for each destination in the range of subnets.
Next -Hop IP address
10.1.1.1
Next-Hop IP address
10.1.1.1
Metric
1
Metric
1