我正在尝试这样做：通过多个本地路由器双归属到一个 ISP 时的负载共享。与示例的唯一区别是 ISP发送的是完整的 BGP 表而不是默认网关。我有一个问题，R101 不会将外部路由通告给 R102，这会在 R102 的上游对等方断开连接时导致问题，并且 R102 丢失所有路由。
我的配置：
R101运行配置：
router bgp 6001
no synchronization
bgp router-id 1.1.2.253
bgp log-neighbor-changes
network 1.1.1.0
network 1.1.2.0
neighbor 2.1.1.249 remote-as 6000
neighbor 2.1.1.249 soft-reconfiguration inbound
neighbor 2.1.1.249 prefix-list 3 in
neighbor 2.1.1.249 route-map R1-DC-MAP out
neighbor 1.1.2.254 remote-as 6001
neighbor 1.1.2.254 next-hop-self
neighbor 1.1.2.254 soft-reconfiguration inbound
maximum-paths 2
no auto-summary
!
ip prefix-list 1 seq 5 permit 1.1.1.0/24
ip prefix-list 2 seq 5 permit 1.1.2.0/24
ip prefix-list 3 seq 5 deny 1.1.1.0/23
ip prefix-list 3 seq 10 permit any
!
route-map R1-DC-MAP permit 10
match ip address prefix-list 1
set as-path prepend 6001 6001 6001
!
route-map R1-DC-MAP permit 20
match ip address prefix-list 2
!
route-map R1-DC-MAP deny 200
R102运行配置：
router bgp 6001
no synchronization
bgp router-id 1.1.2.254
bgp log-neighbor-changes
network 1.1.1.0
network 1.1.2.0
neighbor 3.1.1.25 remote-as 6000
neighbor 3.1.1.25 soft-reconfiguration inbound
neighbor 3.1.1.25 prefix-list 3 in
neighbor 3.1.1.25 route-map R2-SIX-MAP out
neighbor 1.1.2.253 remote-as 6001
neighbor 1.1.2.253 next-hop-self
neighbor 1.1.2.253 soft-reconfiguration inbound
maximum-paths 2
no auto-summary
!
ip prefix-list 1 seq 5 permit 1.1.2.0/24
ip prefix-list 2 seq 5 permit 1.1.1.0/24
ip prefix-list 3 seq 5 deny 1.1.1.0/23
ip prefix-list 3 seq 10 permit any
!
route-map R2-SIX-MAP permit 10
match ip address prefix-list 1
set as-path prepend 6001 6001 6001
!
route-map R2-SIX-MAP permit 20
match ip address prefix-list 2
!
route-map R2-SIX-MAP deny 30
match ip address 1.1.1.0/23
!
route-map R2-SIX-MAP deny 200
!
ip forwarding
!
line vty
!
end
R101接口列表：
Interface vlan3 is up, line protocol detection is disabled
inet 1.1.1.253/30 broadcast 1.1.1.255
Interface vlan4 is up, line protocol detection is disabled
inet 2.1.1.253/29 broadcast 2.1.1.255
Interface vlan101 is up, line protocol detection is disabled
inet 1.1.1.61/26 broadcast 1.1.1.63
inet 1.1.1.1/32 broadcast 1.1.1.1
Interface vlan106 is up, line protocol detection is disabled
inet 1.1.1.125/27 broadcast 1.1.1.127
inet 1.1.1.97/32 broadcast 1.1.1.97
Interface vlan107 is up, line protocol detection is disabled
inet 1.1.1.141/28 broadcast 1.1.1.143
inet 1.1.1.129/28 broadcast 1.1.1.143 secondary
Interface vlan109 is up, line protocol detection is disabled
inet 1.1.1.93/27 broadcast 1.1.1.95
inet 1.1.1.65/32 broadcast 1.1.1.65
R102接口配置：
Interface vlan3 is up, line protocol detection is disabled
inet 1.1.2.254/30 broadcast 1.1.2.255
Interface vlan4 is up, line protocol detection is disabled
inet 3.1.1.29/29 broadcast 3.1.1.31
Interface vlan101 is up, line protocol detection is disabled
inet 1.1.2.62/26 broadcast 1.1.2.63
inet 1.1.2.1/32 broadcast 1.1.2.1
Interface vlan106 is up, line protocol detection is disabled
inet 1.1.2.126/27 broadcast 1.1.2.127
inet 1.1.2.97/32 broadcast 1.1.2.97
Interface vlan107 is up, line protocol detection is disabled
inet 1.1.2.142/28 broadcast 1.1.2.143
inet 1.1.2.129/28 broadcast 1.1.2.143 secondary
Interface vlan109 is up, line protocol detection is disabled
inet 1.1.2.94/27 broadcast 1.1.2.95
inet 1.1.2.65/32 broadcast 1.1.2.65
广告在 R101 上根本不起作用，但我可以看到来自 R102 的广告。与上游 ISP BGP 对等方的通信按预期工作，我正在从他们那里获得完整的 BGP。
R101广告：
BGP table version is 0, local router ID is 1.1.2.253
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
R101 接收路由：
BGP table version is 0, local router ID is 1.1.2.253
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 1.1.1.0 1.1.2.254 0 100 0 i
*> 1.1.2.0 1.1.2.254 0 100 0 i
Total number of prefixes 2
有没有人有任何想法可能有什么问题？