HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 3 - IP Routing Confi - Page 187
BGP path selection configuration example, Network requirements, Configuration procedure
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From : 10.1.3.1 (1.1.1.1) Relay Nexthop : 0.0.0.0 Original nexthop: 10.1.3.1 AS-path : 100 Origin : igp Attribute value : MED 0, localpref 100, pref-val 0, pre 255 State : valid, internal, best, Not advertised to any peers yet The output shows the following: { Switch F can send route information to Switch B and Switch C through the confederation by establishing only an EBGP connection with Switch A. { Switch B and Switch D are in the same confederation, but belong to different sub ASs. They obtain external route information from Switch A and generate the same BGP route entries; it seems like they reside in the same AS although they have no direct connection in between. BGP path selection configuration example Network requirements In Figure 68, all switches run BGP. Between Switch A and Switch B, and between Switch A and Switch C are EBGP connections. Between Switch B and Switch D, and between Switch D and Switch C are IBGP connections. OSPF is the IGP protocol in AS 200. Configure routing policies, making Switch D use the route 1.0.0.0/8 from Switch C as the optimal. Figure 68 Network diagram AS 200 Vlan-int101 AS 100 Vlan-int100 Vlan-int200 Switch A Vlan-int100 Vlan-int300 Switch B Vlan-int300 Vlan-int400 Switch D Vlan-int200 Vlan-int400 Switch C Device Switch A Switch B Interface Vlan-int101 Vlan-int100 Vlan-int200 Vlan-int100 Vlan-int300 IP address 1.0.0.0/8 192.1.1.1/24 193.1.1.1/24 192.1.1.2/24 194.1.1.2/24 Device Switch D Switch C Interface Vlan-int400 Vlan-int300 Vlan-int400 Vlan-int200 IP address 195.1.1.1/24 194.1.1.1/24 195.1.1.2/24 193.1.1.2/24 Configuration procedure 1. Configure IP addresses for interfaces. (Details not shown.) 2. Configure OSPF on Switch B, C, and D: # Configure Switch B. system-view 177
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