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What is the different type of route summarization available in OSPF?
Wiki User
∙ 11y ago
There are two types of summarization:
Inter-area route summarization
External route summarization
i) Inter-Area Route Summarization
Inter-area route summarization is done on ABRs and it applies to routes from within the AS. It does not apply to external routes injected into OSPF via redistribution. In
order to take advantage of summarization, network numbers in areas should be assigned in a contiguous way to be able to lump these addresses into one range. To
specify an address range, perform the following task in router configuration mode:
area area-id range address mask
Where the "area-id" is the area containing networks to be summarized. The "address" and "mask" will specify the range of addresses to be summarized in one range.
The following is an example of summarization:
External route summarization
i) External route summarization is specific to external routes that are injected into OSPF via redistribution. Also, make sure that external ranges that are being
summarized are contiguous. Summarization overlapping ranges from two different routers could cause packets to be sent to the wrong destination. Summarization is
done via the following router ospf subcommand:
Wiki User
∙ 11y ago
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What are the key characteristics of OSPF?
OSPF has the following features:Fast Convergence OSPF can detect and propagate topology changes faster than RIP. Count-to-infinity does not occur with OSPF.Loop-Free Routes OSPF-calculated routes are always loop-free.Scalability With OSPF, an AS can be subdivided into contiguous groups of networks called areas. Routes within areas can be summarized to minimize route table entries. Areas can be configured with a default route summarizing all routes outside the AS or outside the area. As a result, OSPF can scale to large and very large internetworks. In contrast, RIP for IP internetworks cannot be subdivided and no route summarization is done beyond the summarizing for all subnets of a network ID.Subnet Mask Advertised with the Network OSPF was designed to advertise the subnet mask with the network. OSPF supports variable-length subnet masks (VLSM), disjointed subnets, and supernetting.Support for Authentication Information exchanges between OSPF routes can be authenticated.Support for External Routes Routes outside of the OSPF AS are advertised within the AS so that OSPF routers can calculate the least cost route to external networks.
What command injects a default route into an OSPF network?
CCNA Guide to Cisco Networking Fourth Edition Ch.8 Answer: OSPF is configured using the router ospf [process id] command.
Which of is predetermined by an administrator and does not require a routing algorithm?
ospf and static route
What factor does the Cisco implementation of OSPF use to pick the best route?
Bandwidth
How many network types available in OSPF?
3 types off network are availble
Which internal routing protocol would use if you needed to route between Cisco and non-Cisco equipment?
Open standard protocols: Rip or OSPF. They are not Cisco proprietary protocols.
What is the requirement of doing summarization?
To create route summarization, there are some necessary requirements:Routers need to be running a classless routing protocol, as they carry subnet mask information with them in routing updates. (Examples are RIP v2, OSPF, EIGRP, IS-IS, and BGP.)Addresses need to be assigned in a hierarchical fashion for the summarized address to have the same high-order bits. It does us no good if Winnipeg has network 172.16.64.0 and 172.16.67.0 while 172.16.65.0 resides in Calgary and 172.16.66.0 is assigned in Edmonton. No summarization could take place from the edge routers to Vancouver.Tip:Because most networks use NAT and the 10 network internally, it is important when creating your network design that you assign network subnets in a way that they can be easily summarized. A little more planning now can save you a lot of grief later.
What are the characteristics of OSPF areas?
It provides fast network convergence. It transmits route updates throughout a network using IP-based multicasting.
What is ospf throttle?
OSPF LSA throttling helps the dampening of LSA updates in OSPF during times of network instability.
What type of protocol is OSPF?
OSPF is short form of open shortest path first. OSPF is based on linked state routing.
Ccna2 version 4.0 chapter 11?
Router R1 is participating in the OSPF routing protocol as well as the EIGRP routing protocol. If R1 learns of network 192.168.10.0/24 from both the OSPF and internal EIGRP routing protocols, how will the route appear in the routing table of R1?
What type of routing protocol is OSPF?
OSPF is short form of open shortest path first. OSPF is based on linked state routing.
