Quagga不会将前缀传播到其他eBGP邻居

Question

我正在尝试让Quagga做一些简单的事情，比如向另一个连接到eBGP的邻居通告一个eBGP获知的前缀。很简单，对吧？

BGPd配置代码段

!
router bgp 64620
 bgp router-id 172.29.253.80
 bgp log-neighbor-changes
 network 172.29.253.80/32
 timers bgp 10 30
 neighbor 10.35.253.2 remote-as 64901
 neighbor 10.35.253.2 next-hop-self
 neighbor 10.35.253.2 soft-reconfiguration inbound
 neighbor 10.47.0.254 remote-as 64621
 neighbor 10.47.0.254 ebgp-multihop 255
 neighbor 10.47.0.254 next-hop-self
 neighbor 10.47.0.254 soft-reconfiguration inbound
!

前缀10.47.0.0/16从邻居10.47.0.254获知，并重新通告到10.35.253.2

# sh ip bgp 10.47.0.0/16
BGP routing table entry for 10.47.0.0/16
Paths: (1 available, best #1, table Default-IP-Routing-Table)
  Advertised to non peer-group peers:
  10.35.253.2
  64621
    10.47.0.254 from 10.47.0.254 (10.47.0.254)
      Origin IGP, localpref 100, valid, external, best
      Last update: Mon Mar 19 08:35:28 2018

但是检查通向10.35.253.2的通告路由发现它(10.47.0.0/16)确实没有通告。我还用tcpdump验证了这一点。

# sh ip bgp neighbors 10.35.253.2 advertised-routes 
BGP table version is 0, local router ID is 172.29.253.80
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
*> 172.29.253.80/32 10.35.253.1              0         32768 i

Total number of prefixes 1

BGPd版本

# /usr/lib/quagga/bgpd --version
bgpd version 0.99.24.1

Answer 1

这被证明是Quagga中的一个bug；https://bugzilla.quagga.net/show_bug.cgi?id=972

通过切换到FRR来解决，这似乎更积极地维护。