Dell PowerSwitch S5212F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 552
Border Gateway Protocol
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* 201.1.4.2 * 201.1.5.2 * 201.1.6.2 201.1.4.1 201.1.5.1 201.1.6.1 vlan304 vlan305 vlan306 down 1000 1000 3 down 1000 1000 3 down 1000 1000 3 defaul defaul defaul OS10# show bfd neighbors detail Session Discriminator: 1 Neighbor Discriminator: 2 Local Addr: 150.150.1.2 Local MAC Addr: 90:b1:1c:f4:ab:fd Remote Addr: 150.150.1.1 Remote MAC Addr: 90:b1:1c:f4:a4:d4 Interface: vlan10 State: up Configured parameters: TX: 1000ms, RX: 1000ms, Multiplier: 5 Actual parameters: TX: 1000ms, RX: 1000ms, Multiplier: 5 Neighbor parameters: TX: 200ms, RX: 200ms, Multiplier: 49 Role: active VRF: default Client Registered: bgp Uptime: 01:58:09 Statistics: Number of packets received from neighbor: 7138 Number of packets sent to neighbor: 7138 Supported releases 10.4.1.0 or later Border Gateway Protocol Border Gateway Protocol (BGP) is an interautonomous system routing protocol that transmits interdomain routing information within and between autonomous systems (AS). BGP exchanges network reachability information with other BGP systems. BGP adds reliability to network connections by using multiple paths from one router to another. Unlike most routing protocols, BGP uses TCP as its transport protocol. Autonomous systems BGP autonomous systems are a collection of nodes under a single administration with shared network routing policies. Each AS has a number, which an Internet authority assigns-you do not assign the BGP number. The Internet Assigned Numbers Authority (IANA) identifies each network with a unique AS number (ASN). AS numbers 64512 through 65534 are reserved for private purposes. AS numbers 0 and 65535 cannot be used in a live environment. IANA assigns valid AS numbers in the range of 1 to 64511. Multihomed AS Stub AS Transit AS Maintains connections to more than one other AS. This group allows the AS to remain connected to the Internet if a complete failure occurs to one of their connections. This type of AS does not allow traffic from one AS to pass through on its way to another AS. Connected to only one AS. Provides connections through itself to separate networks. For example, Router 1 uses Router 2-the transit AS, to connect to Router 4. Internet service providers (ISPs) are always a transit AS because they provide connections from one network to another. An ISP uses a transit AS to sell transit service to a customer network. When BGP operates inside an AS - AS1 or AS2, it functions as an Internal Border Gateway Protocol (IBGP). When BGP operates between AS endpoints - AS1 and AS2, it functions as an External Border Gateway Protocol (EBGP). IBGP provides routers inside the AS with the path to reach a router external to the AS. EBGP routers exchange information with other EBGP routers and IBGP routers to maintain connectivity and accessibility. 552 Layer 3
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