This chapter discusses how to modify the files that configure the Border Gateway Protocol (BGP).

Transcription

1 encor! enetworks TM Version A, September Encore Networks, Inc. All rights reserved. Sample Revision of the BGP Configuration File This chapter discusses how to modify the files that configure the Border Gateway Protocol (BGP). Note: To configure the BANDIT to use BGP, see Configuring the BANDIT for OSPF or BGP Modifying the BGP Configuration File You can modify the BGP configuration file, bgpd.conf, via an ASCII text editor or from the BANDIT menus. To use an ASCII text editor, open the file and make changes as appropriate. This document discusses editing the file through the BANDIT menus. 1 Log In on the BANDIT menu. (For details, see Starting the ELIOS Software.) The Main Menu is displayed. Main Menu ) QuickStart Config Builder 2) Typical Configurations 3) Advanced Configurations 4) Tools V) View Current Unit Status F) Cellular Fast Connect L) Load Factory Defaults P) Load Plug and Play Defaults W) Write Configuration R) Reset Unit X) exit Session S) Statistics Y) system Administration Enter Choice : 2 2 On the Main Menu, select Typical Configurations. The Typical Configurations Menu is displayed. For information on trademarks, safety, limitations of liability, and similar topics, see Notices. Home Module: Routing Document 12

2 Page 2 Routing Module, Document 12 Typical Configurations Menu ) System Configuration 2) IP Interfaces 3) IP Static Routes 4) VPN Profiles 5) IP/VPN Policies 6) NAT Profiles 7) OSPF/BGP Configuration 8) DNS/DHCP Servers 9) Configure Firewall A) IP QoS (Quality of Service) B) GPS Geo-Fencing L) LAN : EtherNet No DHCP ETHERNET W) WAN : EtherNet No DHCP ETHERNET M) MODEM : Point-to-Point MODEM INTERNAL S) SERIAL : UNDEFINED SERIAL E) EXPANSION : Frame Relay EXPANSION Dual T1/E1 R) RDU/IDU Ports... P) More Ports... Enter Choice : 7 3 On the Typical Configurations Menu, select OSPF/BGP Configuration. The OSPF/BGP Configuration Menu is displayed. OSPF/BGP Configuration ) Global Ospf Configuration 2) Global Bgp Configuration 3) OSPF/BGP Remote Logging : Disabled Enter Choice : 4 On the OSPF/BGP Configuration Menu, select Global BGP Configuration. The Global BGP Configuration Menu is displayed. Global BGP Configuration ) BGP Admin : Disabled 2) Edit Config Enter Choice : 5 On the Global BGP Configuration Menu, select Edit Config. Enter file name [/etc/bgpd.conf]:

3 Sample Revision of the BGP Configuration File Page 3 Note: The system automatically creates the default file /etc/bgpd.conf when the software is loaded. The BANDIT always uses bgpd.conf for BGP configuration. This procedure shows you how to edit that file. 6 To review and edit the listed BGP configuration file, press the Enter key. The line code for the file is displayed. 13 router bgp bgp router-id ! network /8 1 neighbor remote-as ! neighbor route-map set-nexthop out 18! neighbor ebgp-multihop 19! neighbor next-hop-self 20! 7 To see more of the listing, press the Enter key again. The next 20 lines of the file are displayed. 21! access-list all permit any 2 23!route-map set-nexthop permit 10 2 match ip address all 25! set ip next-hop !log file bgpd.log 28! 29 log stdout 8 To see more of the listing, press the Enter key again. The next 20 lines of the file are displayed. Note: If you have reached the end of the file, the first 20 lines are displayed again. For reference, we display here the entire sample listing.

4 Page 4 Routing Module, Document router bgp bgp router-id ! network /8 1 neighbor remote-as ! neighbor route-map set-nexthop out 18! neighbor ebgp-multihop 19! neighbor next-hop-self 20! 21! access-list all permit any 2 23!route-map set-nexthop permit 10 2 match ip address all 25! set ip next-hop !log file bgpd.log 28! 29 log stdout Note: The listing shown is a template for Encore Networks BGP configuration. You will need to modify the lines for your network. A line that begins with an exclamation point (!) is a comment. To add comments, start a line with an exclamation point. To make a line active, remove the initial exclamation point from a commented line. You need to modify the file to reflect the BGP area for this BANDIT device. The following steps are examples of the way to modify lines. Ask your network administrator for all IP addresses and other network information for this BANDIT s BGP configuration. 9 Line 13 in this example shows this BANDIT s autonomous system number. Do the following to change the AS number to Note: Get all AS numbers from your network administrator. a While the listing is displayed, type m to modify a line.

5 Sample Revision of the BGP Configuration File Page 5 Enter line number to modify: b Type the line number you wish to modify and press the Enter key. (In this example, type 13 and press the Enter key.) Enter line below: c Type the line exactly as you want it to appear. Note: Do not type a line number; the system assigns line numbers each time it displays the file. Otherwise, type the line exactly as it appears in the listing, substituting the BANDIT s AS number. router bgp 7675 d When you have finished typing the line, press the Enter key. The BGP configuration file is displayed again, with the new line in place. Line 13 now shows the BANDIT s autonomous system number. 13 router bgp bgp router-id ! network /8 1 neighbor remote-as ! neighbor route-map set-nexthop out 18! neighbor ebgp-multihop 19! neighbor next-hop-self 20! 10 In this step, we will modify the file to reflect the BANDIT s IP address. In this listing, line 14, as shown below, identifies the BANDIT.

6 Page 6 Routing Module, Document 12 1 bgp router-id Note: The sample line starts with an exclamation point, indicating that it is a comment, not an executable line. We will make the line an executable command, and we will assign the BANDIT s IP address. To modify the line, do the following: a While the listing is displayed, type m to modify a line. Enter line number to modify: b Type the line number you wish to modify and press the Enter key. (In this example, type 14 and press the Enter key.) Enter line below: c Type the line exactly as you want it to appear. Note: Do not type a line number; the system assigns line numbers each time it displays the file. Note that we also do not type an exclamation point, because this will be a live command. Otherwise, type the line exactly as it appears in the listing, substituting the IP address for the BANDIT s WAN port. bgp router-id d When you have finished typing the line, press the Enter key. The BGP configuration file is displayed again, with the new line in place. Line 14 is now a live, executable command, assigning the BANDIT s WAN IP address.

7 Sample Revision of the BGP Configuration File Page 7 13 router bgp bgp router-id ! network /8 1 neighbor remote-as ! neighbor route-map set-nexthop out 18! neighbor ebgp-multihop 19! neighbor next-hop-self 20! 11 In the same way, change the network address on line 15,: 15! network / a Type m, then type the line number to modify (15) and press Enter. b Type the line as a live, executable command, using the network address. network /24 c Press the Enter key. The listing is displayed with the revised line.

8 Page 8 Routing Module, Document router bgp bgp router-id network /24 1 neighbor remote-as ! neighbor route-map set-nexthop out 18! neighbor ebgp-multihop 19! neighbor next-hop-self 20! Note: You need to include all the networks that you want this BANDIT to advertise. Insert them after line 15. (Displayed line numbers will change to accommodate insertions.) We will not show an example of insertion yet, because we wish to maintain the line numbers shown for the rest of this example. 12 The following lines must be changed to show this BANDIT s neighbor. In this example, the neighbor s IP address is a Retype line 16 as the following. neighbor remote-as 7675 b Retype line 17 as the following. neighbor route-map set-nexthop out c Retype line 18 as the following. neighbor ebgp-multihop d Retype line 19 as the following.

9 Sample Revision of the BGP Configuration File Page 9 neighbor next-hop-self e After lines 1 through 20 are redisplayed, press Enter to see the next 20 lines. 21! access-list all permit any 2 23!route-map set-nexthop permit 10 2 match ip address all 25! set ip next-hop !log file bgpd.log 28! 29 log stdout f Retype line 21, removing the exclamation point. The line will be a live command. access -list all permit any g Retype lines 23 and 24, removing the exclamation points. The lines will be live commands. route-map set-nexthop permit 10 Note: Leading paces are not required. The application ignores them. However, you may want to use them to help organize the material into groups. This example shows leading spaces when retyping line 24. match ip address all h Retype line 25 as the following. Note that this is the BANDIT s WAN IP address, which you indicated for line 14. (See step 10.) set ip next-hop Note: You need to add the equivalent of lines 16 through 25 for each of the BANDIT s neighbors, with the appropriate IP addresses. (You do not need to add any comment lines, such as lines_20 and 22.)

10 Page 10 Routing Module, Document If you need to insert a line, do the following: a When the listing is displayed, type i to insert a line indicating another network for this BANDIT to advertise. 13 router bgp bgp router-id network /24 16 neighbor remote-as neighbor route-map set-nexthop out 18 neighbor ebgp-multihop 19 neighbor next-hop-self 20! Enter line number to Insert After(0 to prepend): b Type the line number that the inserted line will follow and then press the Enter key. (In this example, type 15 and press Enter.) Enter line below: c Type the new information, using line 15 as a guide. Then press Enter. (In this example, the additional network is identified by the IP address /24.) network /24 The new information is included in the listing. Note that the line numbers have adjusted to accommodate the new line.

11 Sample Revision of the BGP Configuration File Page router bgp bgp router-id network /24 16 network /24 17 neighbor remote-as neighbor route-map set-nexthop out 19 neighbor ebgp-multihop 20 neighbor next-hop-self 14 Continue to modify the BGP configuration file as indicated by your network administrator. The finished file will probably be similar to the following. 13 router bgp bgp router-id network /24 16 network /24 17 neighbor remote-as neighbor route-map set-nexthop out 19 neighbor ebgp-multihop 20 neighbor next-hop-self

12 Page 12 Routing Module, Document 12 21! 21 access-list all permit any 23! 24 route-map set-nexthop permit match ip address all 26 set ip next-hop ! 28!log file bgpd.log 29! 30 log stdout 15 When you have finished modifying the BGP configuration file, press the Escape key. File Modified! Do you want to save it?(y/n)[n]: 16 To save the configuration file, press y. To revert to the previously saved version, press n. The Global BGP Configuration Menu is redisplayed. Global BGP Configuration ) BGP Admin : Enabled 2) Edit Config Enter Choice : 17 Press the Escape key until you reach the Main Menu. 18 On the Main Menu, select Write Configuration to save the configuration. (For details, see Saving (Writing) a Configuration). 19 Then, on the Main Menu, select Reset Unit. (For details, see Resetting the Device.)