Cisco® BGP-4 Command and Configuration Handbook by William R. Parkhurst

By William R. Parkhurst

Because the capacity wherein web locations are communicated among subscribers and repair prone, BGP-4 offers a serious functionality for web operations. no matter if linked to net provider services or firm networks that count seriously on the web, a history in BGP-4 is key. relocating past historical past info, BGP incorporates a nice variety of instructions, and functional details on these instructions is tough to come back by.Cisco BGP-4 Command and Configuration guide is an exhaustive functional connection with the instructions contained inside of BGP-4. for every command/subcommand, writer invoice Parkhurst explains the meant use or functionality and the way to correctly configure it. Then he offers eventualities to illustrate each aspect of the command and its use, in addition to acceptable convey and debug instructions. in the course of the dialogue of performance and the scenario-based configuration examples, Cisco BGP-4 Command and Configuration guide can help you achieve a radical figuring out of the sensible facet of BGP-4.

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Extra resources for Cisco® BGP-4 Command and Configuration Handbook

Sample text

2 remote-as 65530 ! 1 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? 1 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? 1 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? 1 0 1 2 i 50 0 32768 i 0 1 i 32768 i Troubleshooting Step 1. Verify that the BGP neighbors are in the Established state using the show ip bgp neighbors command.

0 Configuration Example: Automatic Route Summarization This example demonstrates the effect of automatic route summarization. In Figure 2-1, static routes, connected routes, and routes learned via OSPF are being redistributed into BGP as shown in the following configurations. The redistributed routes are summarized to a classful boundary by BGP because auto-summary is enabled by default. Figure 2-1. 0 ! 255 area 0 ! 2 remote-as 1 58 59 ! 192 ! 0/24 is being injected into BGP via the network command.

If the neighbor relationship is not in the Established state, see section 8-23. 56 57 Step 2. Ensure that at least one specific route in the BGP table is contained in the range of addresses that you want to aggregate using the show ip bgp command. Step 3. If at least one more-specific route is in the BGP table, go to Step 5. Step 4. If there is not at least one more-specific route in the BGP table, do the following: - Check the syntax (address and mask) of your BGP network command. Go to Step 2.

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