bgp route selection

BGP LOWEST ROUTER ID MINIMUM Claster LIST LENGTH In BGP, in addition to a large set of principles to be understood, the principle of route selection is the most important. Must be mastered (to understand and troubleshoot BGP, here must be to grasp rather than understand)

300i*> 111.1.1.1/32 10.1.13.1 0 0 100i[R4]dis BGP routing-tableTotal number of Routes:5Network nexthop MED locprf prefval Path/ogn*>i 11.1.1.1/32 33.1.1.1 0 2289 0 100i* I 22.1.1.1 0 0 100i*> 55.1.1.1/32 10.1.45.5 0 0 300i*>i 111.1.1.1/32 22.1.1.1 0 0 100i* I 33.1.1.1 0 0 100i[R5]dis BGP routing-tableNetwork nexthop MED locprf prefval Path/ogn*> 11.1.1.1/32 10.1.45.4 0 100i*> 55.1.1.1/32 0.0.0.0 0 0 I*> 11

Why?BGPCannot be aggregated with itRoutingWhich of the following network segments does the device establish a neighbor? A: If BGP establishes a neighbor with the device of the network segment to which the aggregation route belongs, when the device or link of the target network segment fails, it cannot be sensed through the aggregation route, the device will still

Basic Configuration: R1: Router bgp 9806 Nei too many connections 20 remote-as 4808 Bgp router-id 1.1.1.1 R2: Router bgp 4808 Nei 1.1.1.1 remote-as 9806 Nei 1.1.1.1 update-source lo0 Bgp router-id 255.255.255.255.20 Network bandwidth limit 21 mask limit 255 Only the bgp neig

BGP is a familiar protocol. Then, let's give a brief explanation of this Protocol. It mainly targets its synchronization performance. You need to pay attention to this aspect. BGP protocol: A router running the BGP protocol will not advertise the routing information learned from the internal peer (IBGP neighbor) to the external peer (EBGP neighbor ), unless the

At present, there are also a lot of BGP routing protocol applications, so I have studied the synchronization problem in the BGP routing protocol. Here I will share it with you and hope it will be useful to you. BGP protocol: A router running the BGP protocol will not advertise the routing information learned from the i

Bgp dampeningTo enable BGP route dampening or change various BGP route dampening factors, use the bgp dampening command in address family or router configuration mode. to disable the function or restore the default values, use the

Technorati labels: BGP, CCIE, default-information, originate, route BGP default-information originate function testing report 1, Requirement description This Testing need check MAIPU and cisco bgp default-information orginate compatible with each other or not. 2, Testing topology 650) this. width = 650; "style =" backg

Key Issues 1) How does an ACL match route entries with the same subnet and different masks? How do I match entries with the same mask and different subnets? 2) Why does a summary route cause a tumble of BGP peers? 3) Why does the acl fail to match the route entry when attribite-map is used? 4) How to Use advertise-map,

1. As-path Route Selection Analysis Property Propagation Range Default value Priority value Direction Note Weight This router This router 32768, other routers 0 Big Value First Inch Cisco private Local Preference As internal 100: Border router, advertise to IBGP neighbor, tell how to leave this as Big

important attribute inherent in BGP. In ASPATH and BGP Route update, the passed self-developed domain (AS) number is added to the update. In this way, when BGP finds that its own AS is also in it, it can be considered that a loop has occurred. EBGP can consider this AS no problem. In some scenarios, there will be prob

Principles and configurations of the BGP protocol for HCNP learning notes 3-route AggregationThe BGP protocol can use commands to aggregate specific routes into an aggregation route. The Routing aggregation principle adopts the longest matching method with the same mask. Route