I was thinking about fooling around with RTBH and my idea was to connect 3 router in a chain and make them talk BGP to eachother. Like this:
R1 - R2 - R3 The routers become BGP neighbors without any problem, but no routes are exchanged. I have 0 real world experience of BGP and have read about it during my CCNP-studies years ago. I remember that there are certain things with BGP that differs from all other routing protocols I know (because it is a EGP-protocol). But I dont remember the details. Can someone please enlighten me what els needs to be done in my config to make the routers exchange routes over BGP? Some details: R1: R1#sh ip int brie | excl unassigned Interface IP-Address OK? Method Status Protocol FastEthernet0 192.168.1.61 YES manual up up FastEthernet1 192.168.12.1 YES manual up up Loopback1 192.168.11.1 YES manual up up Loopback11 192.168.11.11 YES manual up up R1#sh run | sec router router bgp 65001 no synchronization bgp log-neighbor-changes network 192.168.0.0 mask 255.255.0.0 neighbor 192.168.12.2 remote-as 65002 no auto-summary R2: R2#sh ip int brie | excl unassigned Interface IP-Address OK? Method Status Protocol FastEthernet0 192.168.12.2 YES manual up up FastEthernet1 192.168.23.2 YES manual up up Loopback2 192.168.2.2 YES manual up up Loopback22 192.168.22.22 YES manual up up R2#sh ip int brie | excl unassigned Interface IP-Address OK? Method Status Protocol FastEthernet0 192.168.12.2 YES manual up up FastEthernet1 192.168.23.2 YES manual up up Loopback2 192.168.2.2 YES manual up up Loopback22 192.168.22.22 YES manual up up R2#sh ip bgp neighbors | incl nei BGP neighbor is 192.168.12.1, remote AS 65001, external link BGP table version 1, neighbor version 1/0 BGP neighbor is 192.168.23.3, remote AS 65003, external link BGP table version 1, neighbor version 1/0 R3: Interface IP-Address OK? Method Status Protocol FastEthernet0 192.168.23.3 YES manual up up Loopback3 192.168.3.3 YES manual up up Loopback33 192.168.33.33 YES manual up up router bgp 65003 no synchronization bgp log-neighbor-changes network 192.168.0.0 mask 255.255.0.0 redistribute static neighbor 192.168.23.2 remote-as 65002 no auto-summary -- ------- Jimmy Larsson Ryavagen 173 s-26030 Vallakra Sweden http://blogg.kvistofta.nu -------
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