ZyXEL Communications XGS4600 Series, Руководство пользователя

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Chapter 50 OSPF
XGS4600 Series User’s Guide
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50.5 Configure IPv4 OSPF Areas
To ensure that the Switch receives only routing information from a trusted layer-3 devices, activate
authentication. The OSPF supports three levels of authentication:
• None – no authentication is used.
• Simple – authenticate link state updates using an 8 printable ASCII character password.
• MD5 – authenticate link state updates using a 16 printable ASCII character password.
Always Select the check box to have the Switch advertise a default route to neighboring OSPF routers
even if the Switch does not have one in its routing table.
Metric Enter a route cost (between 0 and 16777215) for the default route.
Metric Type Select 1 to configure the default route as type 1, which has a default cost (metric) of 20 and
adds up the cost toward the destination. Its external metrics are directly comparable to the
internal OSPF cost. When selecting a path, the internal OSPF cost is added to the AB boundary
router to the external metrics.
Select 2 to configure the default route as type 2. The route has a default cost of 20 and the
metric will never change along a traffic path. Its external metrics are not comparable to the
OSPF cost. In this case, the external cost of the AB boundary router is used in path decision to a
destination.
Apply Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Save link on the top navigation panel to save
your changes to the non-volatile memory when you are done configuring.
Cancel Click Cancel to begin configuring this screen afresh.
Table 208 IP Application > IPv4 OSPF > Configuration (continued)
LABEL DESCRIPTION