BGP信号MPLS问题

Question

我在使用带有15.3(2)和BGP信令的VPLS时遇到了问题。@yelfathi和@packettalk为我指明了正确的路线，但不知道如何解决。

我有两个ME3600交换机使用RSVP作为PE和两个MX80路由器作为P。

P路由器显示LSP作为传输LSP正确，我的TE隧道已经启动。在这两个开关上，我得到以下信息：-

SW1.THN-LON#show mpls L2transport vc 501 detail
Local interface: VFI FLVPLS001 vfi up
Interworking type is Ethernet
Destination address: 46.226.0.10, VC ID: 501, VC status: down
Last error: MPLS dataplane reported a fault to the nexthop
Output interface: none, imposed label stack {}
Preferred path: not configured
Default path: no route
No adjacency
Create time: 00:19:42, last status change time: 00:19:42
Last label FSM state change time: 00:19:42
Signaling protocol: BGP
Status TLV support (local/remote)   : Not Applicable
  LDP route watch                   : Not Applicable
  Label/status state machine        : activating, LruRruD
  Last local dataplane   status rcvd: DOWN(pw-tx-fault)
  Last BFD dataplane     status rcvd: Not Applicable
  Last BFD peer monitor  status rcvd: Not Applicable
  Last local AC  circuit status rcvd: No fault
  Last local AC  circuit status sent: DOWN(pw-rx-fault)
  Last local PW i/f circ status rcvd: No fault
  Last local LDP TLV     status sent: Not Applicable
  Last remote LDP TLV    status rcvd: Not Applicable
  Last remote LDP ADJ    status rcvd: Not Applicable
MPLS VC labels: local 27, remote 16
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Control Word: Off
Dataplane:
SSM segment/switch IDs: 0/10075 (used), PWID: 12
VC statistics:
transit packet totals: receive 0, send 0
transit byte totals:   receive 0, send 0
transit packet drops:  receive 0, seq error 0, send 0


SW1.THN-LON#show mpls for 46.226.0.10 detail
Local      Outgoing   Prefix           Bytes Label   Outgoing   Next Hop  
Label      Label      or Tunnel Id     Switched      interface            
None       304720     46.226.0.10/32   0             Tu0        point2point
MAC/Encaps=14/18, MRU=9000, Label Stack{304720}, via Te0/2
A8D0E55DEB3D88F077938CDB8847 4A650000

伪线已上升，但VC仍在下降。

在执行下面的命令时，它会返回，说没有FEC映射。

SW1.THN-LON#ping mpls ipv4 46.226.0.10/32 
Sending 5, 100-byte MPLS Echos to Target FEC Stack TLV descriptor, 
 timeout is 2 seconds, send interval is 0 msec:

Codes: '!' - success, 'Q' - request not sent, '.' - timeout,
'L' - labeled output interface, 'B' - unlabeled output interface, 
'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch,
'M' - malformed request, 'm' - unsupported tlvs, 'N' - no label entry, 
'P' - no rx intf label prot, 'p' - premature termination of LSP, 
'R' - transit router, 'I' - unknown upstream index,
'l' - Label switched with FEC change, 'd' - see DDMAP for return code,
'X' - unknown return code, 'x' - return code 0

Type escape sequence to abort.
FFFFF
Success rate is 0 percent (0/5)
Total Time Elapsed 48 ms

开关相关部件的配置如下：

interface Tunnel0
 description sw1.thn-lon-to-sw1.sco-edi
 ip unnumbered Loopback0
 tunnel mode mpls traffic-eng
 tunnel destination 46.226.0.10
 tunnel mpls traffic-eng autoroute announce
 tunnel mpls traffic-eng priority 1 1
 tunnel mpls traffic-eng path-option 1 dynamic

mpls traffic-eng tunnels
l2vpn vfi context FLVPLS001 
 vpn id 501
 autodiscovery bgp signaling bgp 
  ve id 1
  rd 56595:501
  route-target export 56595:501
  route-target import 56595:501

bridge-domain 501 
 member GigabitEthernet0/1 service-instance 2


interface GigabitEthernet0/1
 description customer xxx
 switchport trunk allowed vlan none
 switchport mode trunk
 mtu 1600
 speed 100
 duplex full
 service instance 1 ethernet
  description Cust: xxx
  encapsulation dot1q 400
  rewrite ingress tag pop 1 symmetric
 !        
 service instance 2 ethernet
  description Oil and Gas VPLS
  encapsulation dot1q 501
  rewrite ingress tag pop 1 symmetric

interface Vlan501
 no ip address
 member vfi FLVPLS001

非常感谢任何帮助/命令等

router bgp 56595  
 bgp log-neighbor-changes  
 bgp graceful-restart restart-time 120  
 bgp graceful-restart stalepath-time 360  
 bgp graceful-restart  
 neighbor 46.226.0.10 remote-as 56595  
 neighbor 46.226.0.10 update-source Loopback0  
 !  
 address-family l2vpn vpls  
  neighbor 46.226.0.10 activate  
  neighbor 46.226.0.10 send-community extended  
  neighbor 46.226.0.10 suppress-signaling-protocol ldp  
 exit-address-family  

为了完整性，我增加了ospf配置。

router ospf 1
 redistribute connected subnets
 redistribute static subnets
 network 46.226.6.80 0.0.0.3 area 0.0.0.0
 mpls traffic-eng router-id Loopback0
 mpls traffic-eng area 0.0.0.0

调试原子事件中的一些事件

*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: Evt dataplane reactivateS, in activating
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: . Activate dataplane
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: . Need to setup the dataplane
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: . Setup dataplane, PWID 21
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: .. Provision SSM with PWID 21, VC ID 501, Block ID 3
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: .. Set imp flags: ra
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: ..              : nsf
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: .. No signal context found, defaulting to single segment PW
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: .. Provision SSM with 7540/20332 (sw/seg)
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: Receive SSM dataplane unavailable notification
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: Evt dataplane downS, in activating
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: . Dataplane unavailable
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: . Set last error: MPLS dataplane reported a fault to the nexthop
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: . Notify dataplane down
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: Deactivating data plane
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: Notify dataplane down
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: Unprovision and deallocate SSM segment
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: Added vc to 60 sec retry queue
*Jun  8 05:31:57.748: AToM[46.226.0.12, 501]: Event provision retry already in retry queue

bgp产量

SW1.THN-LON#show bgp l2vpn vpls all
BGP table version is 17, local router ID is 46.226.0.12
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, 
          r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter, 
          x best-external, a additional-path, c RIB-compressed, 
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

 Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 56595:501
 *>  56595:501:VEID-1:Blk-1/136
                   0.0.0.0                            32768 ?
 *>i 56595:501:VEID-2:Blk-1/136
                   46.226.0.10              0    100      0 ?

在@ytti的帮助下，我们将其缩小到me3600中关于BGP信令的一个bug。

我们把信号变成了自民党，它运行得很好。将发布一个更新，一旦解决与思科。

Answer 1

修改答案/合并评论并进行另一次尝试(免责声明:我的MPLS/VPLS经验不在Cisco平台上)。试图推断您的拓扑结构是什么样子：

ME3600<--->MX80<--->MX80<--->ME3600

你说过你要在所有这些之间运行OSPF。你有没有检查过你的设备之间有一个完整的LSP网络？(这是香草VPLS的一项要求)。您是否在ME3600's上配置了mpls traffic-eng area x和mpls traffic-eng router-id Loopback0在router ospf内？

我假设Tunnel0实际上是LSP的代表(我知道这个问题中出现了术语" Pseudowire“，但对我来说，Pseudowire= L2VPN/EoMPLS/VLL)。LSP是单向的，所以由于缺乏一个完整的LSP网，ME3600's可以在路由表中看到对方的回环，P路由器可能会干扰RSVP信号/掉落在地板上的东西。

Answer 2

好像在下到出口开关的路上出了飞机问题。ping ipv4 46.226.0.10/32的输出量是多少？

Answer 3

在c上找到了一篇文章，表明MTU不匹配(无论是全局的还是在接口上)可能要负责：http://www.gossamer-threads.com/lists/cisco/nsp/98769#98769，另一件值得检查的事情是，两个PE路由器的路由表中都有彼此的回送地址(如/32)。