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Configuring IP Services
10-2
117356-B Rev. 00
By default, RIPSO is disabled on IP interfaces. You can use Site Manager to
enable RIPSO on an IP interface, and specify:
A range of acceptable security levels for IP datagrams the interface receives
and transmits
A set of required and allowed authority values for IP datagrams the interface
receives and transmits
Whether inbound datagrams received on this interface require security labels
Whether outbound datagrams transmitted on this interface (either forwarded
or originated by the router) require security labels
Whether datagrams received or transmitted on this interface should have their
labels stripped
You also specify whether the router creates the following types of labels:
An implicit label, which the router uses to label unlabeled inbound datagrams,
when required
A default label, which the router uses to label unlabeled outbound datagrams,
when required
An error label, which the router uses to label ICMP error messages associated
with processing security options
Security Label Format
A RIPSO security label is three or more bytes long and specifies the security
classification level and protection authority values for the datagram (Figure 10-1).
Figure 10-1. RIPSO Security Label
Type Length
Security
classification
Protection
authority
IP datagram...
1 octet 1 octet
or more
1 octet 1 octet
1P0013A
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