在一台设备上 vpn A与VPNB做RT互导,vpn A到 10.72.1.0 24存在3条路由,其中2条 best路由,display ip routing vpnv4也存在2条等价路由,但是在vpnB里只能看到一条best路由,没有形成等价,vpnB也配置了balance 8,求问这是为什么
<CR16006-F1>dis bgp routin ipv4 vpn A 10.72.1.0 24
BGP local router ID: 10.50.254.11
Local AS number: 65128
Paths: 3 available, 2 best
BGP routing table information of 10.72.1.0/24:
From : 10.50.239.2 (10.0.88.12)
Rely nexthop : 10.50.239.2
Original nexthop: 10.50.239.2
Out interface : Ten-GigabitEthernet2/1/2.200
Route age : 00h44m05s
OutLabel : NULL
Community : <65130:46000>
Ext-Community : <SOO: 65130:46000>, <RT: 46000:46000>
RxPathID : 0x0
TxPathID : 0x0
AS-path : 65130
Origin : incomplete
Attribute value : MED 1, pref-val 0
State : valid, external, best
Source type : local
IP precedence : N/A
QoS local ID : N/A
Traffic index : N/A
Tunnel policy : NULL
Rely tunnel IDs : N/A
From : 10.50.238.2 (10.0.88.11)
Rely nexthop : 10.50.238.2
Original nexthop: 10.50.238.2
Out interface : Ten-GigabitEthernet2/1/1.100
Route age : 00h44m00s
OutLabel : NULL
Community : <65130:46000>
Ext-Community : <SOO: 65130:46000>, <RT: 46000:46000>
RxPathID : 0x0
TxPathID : 0xffffffff
AS-path : 65130
Origin : incomplete
Attribute value : MED 1, pref-val 0
State : valid, external, best
Source type : local
IP precedence : N/A
QoS local ID : N/A
Traffic index : N/A
Tunnel policy : NULL
Rely tunnel IDs : N/A
From : 10.50.254.3 (10.50.254.3)
Rely nexthop : 10.50.253.53
Original nexthop: 10.50.254.12
Out interface : Ten-GigabitEthernet2/2/5
Route age : 00h43m30s
OutLabel : 1131
Community : <100:2>, <65130:46000>
Ext-Community : <SOO: 65130:46000>, <RT: 46000:46000>
RxPathID : 0x0
TxPathID : 0xffffffff
AS-path : 65130
Origin : incomplete
Attribute value : MED 1, localpref 100, pref-val 0
State : valid, internal, remoteredist, not preferred for remote-route
Source type : remote-import
Originator : 10.50.254.12
Cluster list : 10.50.254.3
IP precedence : N/A
QoS local ID : N/A
Traffic index : N/A
Tunnel policy : NULL
Rely tunnel IDs : 1
<CR16006-F1>dis bgp routin ipv4 vpn B 10.72.1.0 24
BGP local router ID: 10.50.199.1
Local AS number: 65128
Paths: 2 available, 1 best
BGP routing table information of 10.72.1.0/24:
From : 10.50.239.2 (10.0.88.12)
Rely nexthop : 10.50.239.2
Original nexthop: 10.50.239.2
Out interface : Ten-GigabitEthernet2/1/2.200
Route age : 00h43m37s
OutLabel : NULL
Community : <65130:46000>
Ext-Community : <SOO: 65130:46000>, <RT: 46000:46000>
RxPathID : 0x0
TxPathID : 0x0
AS-path : 65130
Origin : incomplete
Attribute value : MED 1, pref-val 0
State : valid, external, best, localredist
Source type : local-import
IP precedence : N/A
QoS local ID : N/A
Traffic index : N/A
Tunnel policy : NULL
Rely tunnel IDs : N/A
From : 10.50.254.3 (10.50.254.3)
Rely nexthop : 10.50.253.53
Original nexthop: 10.50.254.12
Out interface : Ten-GigabitEthernet2/2/5
Route age : 00h43m38s
OutLabel : 1131
Community : <100:2>, <65130:46000>
Ext-Community : <SOO: 65130:46000>, <RT: 46000:46000>
RxPathID : 0x0
TxPathID : 0xffffffff
AS-path : 65130
Origin : incomplete
Attribute value : MED 1, localpref 100, pref-val 0
State : valid, internal, remoteredist, not preferred for remote-route
Source type : remote-import
Originator : 10.50.254.12
Cluster list : 10.50.254.3
IP precedence : N/A
QoS local ID : N/A
Traffic index : N/A
Tunnel policy : NULL
Rely tunnel IDs : 1
<CR16006-F1>
(0)
引入的时候有做什么前缀列表的限制吗?很奇怪啊,正常来说能引进来的。也可以用模拟器把配置导入看下结果是不是一样的
(0)
前缀列表不会限制下一跳 只会限制路由啊 我的目的网段都是10.72.1.0 24 要限制就都限制了,不会一条导过来了
vpn-instance B的那两条路由,一条是标签路由(带有outlabel,另一条是非标签路由),在BGP的负载中,要求是,1.as-path、med、lp、origin属性完全一致,2.配置balance、3.同为标签路由或同为非标签路由,4.下一跳度量值相同,你这原因是因为第三个,所以形成不了等价,你看vpn-instance A里面,那两个等价的,是不是都没带标签
(0)
想问的是下一跳为10.50.238.2 (10.0.88.11) 与10.50.239.2 (10.0.88.12)的为什么没有形成等价
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前缀列表不会限制下一跳 只会限制路由啊 我的目的网段都是10.72.1.0 24 要限制就都限制了,不会一条导过来了