Ospfv3 Identifies Neighbors By Router Id; Other Internal Improvements; Ospfv3 Limitations; Ospfv3 Configuration Example - Lenovo RackSwitch G8264CS Application Manual

OSPFv3 Identifies Neighbors by Router ID

Other Internal Improvements

OSPFv3 Limitations

OSPFv3 Configuration Example

© Copyright Lenovo 2017
Where OSPFv2 uses a mix of IPv4 interface addresses and Router IDs to identify
neighbors, depending on their type, OSPFv3 configuration consistently uses a
Router ID to identify all neighbors.
Although Router IDs are written in dotted decimal notation, and may even be
based on IPv4 addresses from an original OSPFv2 network configuration, it is
important to realize that Router IDs are not IP addresses in OSPFv3, and can be
assigned independently of IP address space. However, maintaining Router IDs
consistent with any legacy OSPFv2 IPv4 addressing allows for easier
implementation of both protocols.
OSPFv3 has numerous improvements that increase the protocol efficiency in
addition to supporting IPv6 addressing. These improvements change some of the
behaviors in the OSPFv3 network and may affect topology consideration, but have
little direct impact on configuration. For example:
Addressing fields have been removed from Router and Network LSAs.

 Flexible treatment of unknown LSA types to make integration of OSPFv3 easier.
Interface network type can be specified using the command:

8264CS(config-ip-if)# ipv6 ospf network
{broadcast|non-broadcast|point-to-multipoint|point-to-point}
 For an interface network type that is not broadcast or NBMA, link LSA
suppression can be enabled so link LSA is not originated for the interface. Use
RS 8264CS(config-ip-if)# ipv6 ospf linklsasuppress
the command:
ENOS 8.4 does not currently support multiple interfaces of OSPFv3 on the same
link.
The following example depicts the OSPFv3 equivalent configuration of
"Example 3: Summarizing Routes" on page
In this example, one summary route from area 1 (stub area) is injected into area 0
(the backbone). The summary route consists of all IP addresses from the 36::0/32
portion of the 36::0/56 network, except for the routes in the 36::0/8 range.
Figure 55. Summarizing Routes
Backbone
Area 0
(0.0.0.0)
IF 3
10::1
Summary Route
10::0/56
Network
490 for OSPFv2.
Stub Area
Area 1
(0.0.0.1)
IF 4
36::1
36::0/32
ABR
(- 36::0/8)
36::0/56
Network
Chapter 29: Open Shortest Path First
RS
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