HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Configuration Gu - Page 259
BGP path selection configuration example, Network requirements, Configuration procedure
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BGP routing table information of 9.1.1.0/24: From : 10.1.3.1 (1.1.1.1) Relay nexthop : 10.1.3.1 Original nexthop: 10.1.3.1 OutLabel : NULL AS-path : 100 Origin : igp Attribute value : MED 0, localpref 100, pref-val 0, pre 255 State : valid, internal-confed, best, The output indicates 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 as if they were in one AS, although they have no direct connection in between. BGP path selection configuration example Network requirements In Figure 64, all switches run BGP. EBGP runs between Switch A and Switch B, and between Switch A and Switch C. IBGP runs between Switch B and Switch D, and between Switch D and Switch C. 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 64 Network diagram Device Switch A Switch B Interface Vlan-int101 Vlan-int100 Vlan-int200 Vlan-int100 Vlan-int300 IP address 1.0.0.1/8 192.1.1.1/24 193.1.1.1/24 192.1.1.2/24 194.1.1.2/24 Device Switch D Switch C Configuration procedure 1. Configure IP addresses for interfaces. (Details not shown.) 2. Configure OSPF on Switch B, Switch C, and Switch D: 248 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
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