User's Manual

Configuring RIPSO on an IP Interface
308625-14.00 Rev 00
3-5
Originated IP Datagrams
When the router originates a datagram and the following conditions are true, the
router labels the datagram with the default security label before transmitting it:
• The datagram needs forwarding through a RIPSO interface.
• The RIPSO interface requires outbound labels for originated datagrams.
Unlabeled IP Datagrams
If the router receives an unlabeled IP datagram from an interface on which RIPSO
is not enabled (or on which labels are not required for inbound datagrams), and
the IP datagram needs forwarding to an interface on which RIPSO is enabled and
labels are required for outbound datagrams, then the router labels the datagram,
using either an implicit label or a default label as follows:
• If the inbound interface has an implicit label configured, the router uses it to
label the datagram.
• If the inbound interface does not have an implicit label configured, the router
labels the datagram with the default label configured for the outbound
interface.
If the interface does not have an implicit or default label configured, the datagram
is dropped.