What is default-information originate?
As you probably already know, default-information originate tells the router to inject any default route that has been configured on the router into the OSPF. The OSPF router does not, by default, generate a default route into the OSPF domain.
What is default route in BGP?
Default routes are used by routing devices to forward packets to destination networks not available in the routing table. These are the different ways to configure a router running the Border Gateway Protocol (BGP) to send a default route to its BGP peers: Configure a static route to the 0.0.
What is default-originate command?
The neighbor default-originate command enables the local router to send the default route 0.0. 0.0 to a neighbor. The neighbor can then use this route to reach the router if all other routes are not available.
What is difference between default-information originate and default-information originate always in OSPF?
In OSPF, the “default-information originate” command will not advertise to any other routers without a default route in the routing table. When added the “always” keyword , it tells the router to advertise a default route to other routers even if you don’t have a default route in the routing table.
What is the difference between default-information originate and redistribute static?
default-information originate injects a default route (ie 0.0. 0.0/0) in the routing table of the peers, while redistribute static will redistribute static routes ( ip route xxx ) into the routing protocol.
How do I find the default route?
Click Start, click Run, type cmd in the Open box, and then click OK. Type route print, and then press ENTER to view the routing table. Note the interface number of the network interface that you re-added. Type route print to verify that the new default route appears in the routing table.
What is default-information originate OSPF?
What is a BGP prefix list?
A prefix list allows routing systems to determine which routes must be accepted when they peer with other networks. It includes IP prefixes with a match criteria that allows or denies route redistribution. It contains one or more ordered entries which are processed sequentially.
What does default information originate always do?
What is the difference between default information originate and redistribute static?
How do I create a default route in Eigrp?
One way to inject a default route into EIGRP is to configure a static default route pointing to Null0 and then redistribute the default route into EIGRP. When redistributing a static, connected, or EIGRP route for another AS, the metric does not need to be assigned. The default route will be an external EIGRP route.
What is the correct syntax of a floating static route?
To be a floating static route, the configured route must have a higher administrative distance than the primary route. For example, if the primary route is learned through OSPF, then a floating static route that serves as a backup to the OSPF route must have an administrative distance greater than 110.
What is the purpose of default information originate in BGP?
04-24-200704:59 AM 04-24-200704:59 AM the only purpose of the “default-information originate” command in BGP is to allow the redistribution of the default route in BGP. It doesn’t generate the default route as it is the case for OSPF.
What is the difference between BGP rib and default-information originate?
The default-information originate, redistribution from a different source, and network 0.0.0.0 are all similar in the resulting effect: they will inject the default route into BGP RIB and it will be advertised to all BGP neighbors. The difference is in the origin of the default route that is injected into BGP:
How to create default route from BGP neighbor?
Hi John, A default route can be originated from a BGP neighbor in 3 ways: 1. default-information originate + redistribute static (or any dynamic routing protocol having the default route – you may filter only the default route) 2. network command but must make sure the default route is present in the routing table
What is the difference between OSPF and BGP default routes?
In the case of BGP, if you are using the “default-information originate” the default route must be in the routing table, but if using the “neighbor x.x.x.x default-originate” in front of a neighbor the default route doesn’t need to be in the routing table. While OSPF has the always keyword, BGP doesn’t.