Multi-Area Adjacency For Ospf Version 2; Label Distribution Protocol Igp Auto-Configuration For Ospf - Cisco ASR 9000 Series Configuration Manual

Multi-Area Adjacency for OSPF Version 2

The range for maximum paths is from 1 to 8 and the default number of maximum paths is 8.
Multi-Area Adjacency for OSPF Version 2
The multi-area adjacency feature for OSPFv2 allows a link to be configured on the primary interface in more
than one area so that the link could be considered as an intra-area link in those areas and configured as a
preference over more expensive paths.
This feature establishes a point-to-point unnumbered link in an OSPF area. A point-to-point link provides a
topological path for that area, and the primary adjacency uses the link to advertise the link consistent with
draft-ietf-ospf-multi-area-adj-06.
The following are multi-area interface attributes and limitations:
• Exists as a logical construct over an existing primary interface for OSPF; however, the neighbor state
• Establishes a neighbor relationship with the corresponding multi-area interface on the neighboring router.
• Advertises an unnumbered point-to-point link in the router link state advertisement (LSA) for the
• Created as a point-to-point network type. You can configure multi-area adjacency on any interface where
• Inherits the Bidirectional Forwarding Detection (BFD) characteristics from its primary interface. BFD
The multi-area interface inherits the interface characteristics from its primary interface, but some interface
characteristics can be configured under the multi-area interface configuration mode as shown below:
RP/0/RSP0/CPU0:router(config-ospf-ar)# multi-area-interface GigabitEthernet 0/1/0/3
RP/0/RSP0/CPU0:router(config-ospf-ar-mif)# ?
authentication
authentication-key
cost
cost-fallback
database-filter
dead-interval
distribute-list
hello-interval
message-digest-key
mtu-ignore
packet-size
retransmit-interval
transmit-delay
RP/0/RSP0/CPU0:router(config-ospf-ar-mif)#

Label Distribution Protocol IGP Auto-configuration for OSPF

Label Distribution Protocol (LDP) Interior Gateway Protocol (IGP) auto-configuration simplifies the procedure
to enable LDP on a set of interfaces used by an IGP instance, such as OSPF. LDP IGP auto-configuration can
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
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on the primary interface is independent of the multi-area interface.
A mixture of multi-area and primary interfaces is not supported.
corresponding area when the neighbor state is full.
only two OSF speakers are attached. In the case of native broadcast networks, the interface must be
configured as an OPSF point-to-point type using the network point-to-point command to enable the
interface for a multi-area adjacency.
is not configurable under a multi-area interface; however, it is configurable under the primary interface.
Enable authentication
Authentication password (key)
Interface cost
Cost when cumulative bandwidth goes below the theshold
Filter OSPF LSA during synchronization and flooding
Interval after which a neighbor is declared dead
Filter networks in routing updates
Time between HELLO packets
Message digest authentication password (key)
Enable/Disable ignoring of MTU in DBD packets
Customize size of OSPF packets upto MTU
Time between retransmitting lost link state advertisements
Estimated time needed to send link-state update packet
Implementing OSPF
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