Does OSPF support authentication?
OSPF can be configured to authenticate every OSPF message. This is usually done to prevent a rogue router from injecting false routing information and therefore causing a Denial-of-Service attack. 2. MD5 authentication – MD5 authentication is used.
What is Cisco IOS XR used for?
IOS XR is a train of Cisco Systems’ widely deployed Internetworking Operating System (IOS), used on their high-end Network Convergence System (NCS), carrier-grade routers such as the CRS series, 12000 series, and ASR9000 series.
What is the format of the router ID on an OSPF enabled router?
A router ID is a 32-bit number formatted like an IPv4 address and assigned in order to uniquely identify a router among OSPF peers.
What is one reason to change the IP OSPF priority command when the OSPF routing protocol is in use?
99 Cards in this Set
| What is one reason to use the ip ospf priority command when the OSPF routing protocol is in use? | to influence the DR/BDR election process |
|---|---|
| This command is used to verify which routing protocol is configured, the AS number, and whether automatic summarization is enabled. | show ip protocols |
Which authentication method is not supported by OSPF?
Configuration overview: 1) Null authentication: Null authentication means that there is no authentication, which is the default on Cisco routers.
How do I enable MD5 authentication for OSPF?
Procedure
- Create an OSPF area. [edit] user@host# edit protocols ospf area 0.0.0.0.
- Specify the interface. [edit protocols ospf area 0.0.0.0] user@host# edit interface so-0/2/0.
- Configure MD5 authentication and set a key ID and an authentication password.
- If you are done configuring the device, commit the configuration.
What is the difference between Cisco IOS and IOS XR?
Cisco IOS-XR Originally designed for 64-bit operation, IOS-XR offers many of the enhancements found in NX-OS (e.g. symmetric multiprocessing, separate memory spaces, and activating only services that are needed). However, while NX-OS is built on a Linux kernel, IOS-XR is built on the QNX Neutrino Microkernel.
What does IOS XR stand for?
One of Apple’s new phones this fall is the iPhone XR. Apple finally revealed what the “R” means. Apparently, it’s an homage to “special” sports cars, according to Apple’s marketing chief, Phil Schiller.
What are OSPF commands on Cisco IOS XR software?
OSPF Commands on Cisco IOS XR Software This chapter describes the commands used to configure and monitor the Open Shortest Path First (OSPF) routing protocol. For detailed information about OSPF concepts, configuration tasks, and examples, see the Implementing OSPF on Cisco IOS XR Software configuration guide.
What kind of router is needed for OSPF?
OSPF typically requires coordination among many internal routers: Area Border Routers (ABRs), which are routers attached to multiple areas, and Autonomous System Border Routers (ASBRs) that export reroutes from other sources (for example, IS-IS, BGP, or static routes) into the OSPF topology.
What is the difference between OSPF and OSPFv3?
OSPF runs directly on top of IP; it does not use TCP or User Datagram Protocol (UDP). OSPF performs its own error correction by means of checksums in its packet header and LSAs. In OSPFv3, the fundamental concepts are the same as OSPF Version 2, except that support is added for the increased address size of IPv6.
Why is OSPF the best IGP for large networks?
OSPF is the IGP of choice because it scales to large networks. It uses areas to partition the network into more manageable sizes and to introduce hierarchy in the network. A router is attached to one or more areas in a network.