Quanta Cloud Technology QuantaMesh QNOS5, Configuration Manual

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(QCT) (Config)#ip routing
2. Configure the loopback interface.
(QCT) (Config)#interface loopback 1
(QCT) (Interface loopback 1)#ip address 3.0.0.3 /24
(QCT) (Interface loopback 1)#exit
3. Configure port 0/2.
(QCT) (Config)#interface 0/2
(QCT) (Interface 0/2)#routing
(QCT) (Interface 0/2)#ip unnumbered loopback 1
(QCT) (Interface 0/2)#exit
4. Configure port 0/3.
(QCT) (Interface 0/3)#routing
(QCT) (Interface 0/3)#ip unnumbered loopback 1
(QCT) (Interface 0/3)#exit
(QCT) (Config)#
When you have completed the configuration instructions above, try to ping 2.0.0.2 and 3.0.0.3 from router 1.
7.2. OSPF
OSPF is an Interior Gateway Protocol (IGP) that performs dynamic routing within a network. The top level of
the hierarchy of an OSPF network is known as an OSPF domain. The domain can be divided into areas.
Routers within an area must share detailed information on the topology of their area, but require less detailed
information about the topology of other areas. Segregating a network into areas enables limiting the
amount of route information communicated throughout the network.
Areas are identified by a numeric ID in IP address format n.n.n.n (note, however, that these are not used as
actual IP addresses). For simplicity, the area can be configured and referred to in normal integer notation.
For example, Area 20 is identified as 0.0.0.20 and Area 256 as 0.0.1.0. The area identified as 0.0.0.0 is
referred to as Area 0 and is considered the OSPF backbone. All other OSPF areas in the network must
connect to Area 0 directly or through a virtual link. The backbone area is responsible for distributing routing
information between non-backbone areas.
A virtual link can be used to connect an area to Area 0 when a direct link is not possible. A virtual link
traverses an area between the remote area and Area 0.
A stub area is an area that does not accept external LSAs (LSAs generated by redistributing routes) that were
learned from a protocol other than OSPF or were statically configured. These routes typically send traffic
outside the AS. Therefore, routes from a stub area to locations outside the AS use the default gateway. A
virtual link cannot be configured across a stub area. A Not So Stubby Area can import limited external routes
only from a connected ASBR.