Brocade Multi-Service IronWare Routing Configuration Guide Uživatelský manuál stáhnout pdf (Strana 41)

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Multi-Service IronWare Routing Configuration Guide 13

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BGP4 Restart

FIGURE 4 Example of Local AS configured on ISP-B

A Local AS is configured using the BGP4 neighbor command, as described in “Configuring BGP4

neighbors” on page 47. To confirm that a Local AS has been configured use the show ip /jointfilesconvert/1441120/bgp

neighbors command, as described in “Displaying BGP4 neighbor information” on page 122.

BGP4 null0 routing

BGP4 considers the null0 route in the routing table (for example, static route) as a valid route, and

can use the null0 route to resolve the next hop. If the next hop for BGP4 resolves into a null0 route,

the BGP4 route is also installed as a null0 route in the routing table.

The null0 routing feature allows network administrators to block certain network prefixes using

null0 routes and route-maps, directing a remote device to drop all traffic for a network prefix by

redistributing a null0 route into BGP4.

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