linux ubuntu mpls

10.10.18.148节点

focal# show run
Building configuration...

Current configuration:
!
frr version 7.2.1
frr defaults traditional
hostname focal
log syslog informational
no ip forwarding
no ipv6 forwarding
service integrated-vtysh-config
!
router bgp 65000
 no bgp default ipv4-unicast
 neighbor 10.10.18.152 remote-as 65000
 neighbor 10.10.18.152 update-source ens3
 !
 address-family ipv4 vpn
  neighbor 10.10.18.152 activate
 exit-address-family
!
router ospf
 ospf router-id 10.10.18.148
 redistribute connected
 redistribute static
 network 10.10.18.0/24 area 0
!
mpls ldp
 router-id 10.10.18.148
 !
 address-family ipv4
  discovery transport-address 10.10.18.148
  !
  interface eth0
  !
 exit-address-family
 !
!
line vty
!
end
focal#

root@focal2-2:~# vtysh

Hello, this is FRRouting (version 7.2.1).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

focal2-2# show run
Building configuration...

Current configuration:
!
frr version 7.2.1
frr defaults traditional
hostname focal2-2
log syslog informational
no ip forwarding
no ipv6 forwarding
service integrated-vtysh-config
!
router bgp 65000
 no bgp default ipv4-unicast
 neighbor 10.10.18.148 remote-as 65000
 neighbor 10.10.18.148 update-source ens3
 !
 address-family ipv4 vpn
  neighbor 10.10.18.148 activate
 exit-address-family
!
router ospf
 ospf router-id 10.10.18.152
 redistribute connected
 redistribute static
 network 10.10.18.0/24 area 0
!
mpls ldp
 router-id 10.10.18.152
 !
 address-family ipv4
  discovery transport-address 10.10.18.152
  !
  interface eth0
  !
 exit-address-family
 !
!
line vty
!
end
focal2-2#

10.10.18.152节点

root@focal2-2:~# vtysh

Hello, this is FRRouting (version 7.2.1).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

focal2-2# show run
Building configuration...

Current configuration:
!
frr version 7.2.1
frr defaults traditional
hostname focal2-2
log syslog informational
no ip forwarding
no ipv6 forwarding
service integrated-vtysh-config
!
router bgp 65000
 no bgp default ipv4-unicast
 neighbor 10.10.18.148 remote-as 65000
 neighbor 10.10.18.148 update-source ens3
 !
 address-family ipv4 vpn
  neighbor 10.10.18.148 activate
 exit-address-family
!
router ospf
 ospf router-id 10.10.18.152
 redistribute connected
 redistribute static
 network 10.10.18.0/24 area 0
!
mpls ldp
 router-id 10.10.18.152
 !
 address-family ipv4
  discovery transport-address 10.10.18.152
  !
  interface eth0
  !
 exit-address-family
 !
!
line vty
!
end
focal2-2#

focal# show mpls ldp neighbor 
AF   ID              State       Remote Address    Uptime
focal# show ip ospf 
border-routers  interface       mpls-te         route           vrf             
database        json            neighbor        router-info     vrfs            
focal# show ip ospf neighbor 

Neighbor ID     Pri State           Dead Time Address         Interface            RXmtL RqstL DBsmL

focal#

focal# show ip ospf neighbor 

Neighbor ID     Pri State           Dead Time Address         Interface            RXmtL RqstL DBsmL

focal# show ip bgp sum

IPv4 VPN Summary:
BGP router identifier 10.10.18.148, local AS number 65000 vrf-id 0
BGP table version 0
RIB entries 0, using 0 bytes of memory
Peers 1, using 20 KiB of memory

Neighbor        V         AS MsgRcvd MsgSent   TblVer  InQ OutQ  Up/Down State/PfxRcd
10.10.18.152    4      65000      24      24        0    0    0 00:21:17            0

Total number of neighbors 1
focal#

无法建立ospf邻居

root@focal:~# tail -f  /var/log/frr/ospfd.log
2020/07/24 09:24:17 OSPF: make_hello: options: 2, int: ens3:10.10.18.148
2020/07/24 09:24:17 OSPF: ospf_write to 224.0.0.5, id 25107, off 0, len 64, interface ens3, mtu 1500:
2020/07/24 09:24:17 OSPF: Hello sent to [224.0.0.5] via [ens3:10.10.18.148].
2020/07/24 09:24:27 OSPF: make_hello: options: 2, int: ens3:10.10.18.148
2020/07/24 09:24:27 OSPF: ospf_write to 224.0.0.5, id 25108, off 0, len 64, interface ens3, mtu 1500:
2020/07/24 09:24:27 OSPF: Hello sent to [224.0.0.5] via [ens3:10.10.18.148].
2020/07/24 09:24:37 OSPF: make_hello: options: 2, int: ens3:10.10.18.148
2020/07/24 09:24:37 OSPF: ospf_write to 224.0.0.5, id 25109, off 0, len 64, interface ens3, mtu 1500:
2020/07/24 09:24:37 OSPF: Hello sent to [224.0.0.5] via [ens3:10.10.18.148].
2020/07/24 09:24:47 OSPF: make_hello: options: 2, int: ens3:10.10.18.148
2020/07/24 09:24:47 OSPF: ospf_write to 224.0.0.5, id 25110, off 0, len 64, interface ens3, mtu 1500:
2020/07/24 09:24:47 OSPF: Hello sent to [224.0.0.5] via [ens3:10.10.18.148].
2020/07/24 09:24:57 OSPF: make_hello: options: 2, int: ens3:10.10.18.148
2020/07/24 09:24:57 OSPF: ospf_write to 224.0.0.5, id 25111, off 0, len 64, interface ens3, mtu 1500:
2020/07/24 09:24:57 OSPF: Hello sent to [224.0.0.5] via [ens3:10.10.18.148].
2020/07/24 09:25:07 OSPF: make_hello: options: 2, int: ens3:10.10.18.148
2020/07/24 09:25:07 OSPF: ospf_write to 224.0.0.5, id 25112, off 0, len 64, interface ens3, mtu 1500:
2020/07/24 09:25:07 OSPF: Hello sent to [224.0.0.5] via [ens3:10.10.18.148].
^C
root@focal:~# ping 224.0.0.5
PING 224.0.0.5 (224.0.0.5) 56(84) bytes of data.
^C
--- 224.0.0.5 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1020ms

root@focal:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether fa:16:3e:07:4f:e6 brd ff:ff:ff:ff:ff:ff
    inet 10.10.18.148/24 brd 10.10.18.255 scope global ens3
       valid_lft forever preferred_lft forever
    inet 10.10.18.148 peer 10.10.18.152/32 scope global ens3
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fe07:4fe6/64 scope link 
       valid_lft forever preferred_lft forever
root@focal:~# telnet localhost 2604
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Vty password is not set.
Connection closed by foreign host.
root@focal:~#

还是没有

focal> show ip ospf neighbor

Neighbor ID     Pri State           Dead Time Address         Interface            RXmtL RqstL DBsmL

focal>

root@focal:~# telnet 10.10.18.148 zebra
Trying 10.10.18.148...
telnet: Unable to connect to remote host: Connection refused
root@focal:~# telnet localhost zebra
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.

Hello, this is FRRouting (version 7.2.1).
Copyright 1996-2005 Kunihiro Ishiguro, et al.


User Access Verification

Password:

root@focal:/etc/frr# telnet 10.10.18.148 22
Trying 10.10.18.148...
Connected to 10.10.18.148.
Escape character is '^]'.
SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.1
q
Invalid SSH identification string.
Connection closed by foreign host.
root@focal:/etc/frr#

root@focal2-2:~# telnet 10.10.18.148 zebra
Trying 10.10.18.148...
telnet: Unable to connect to remote host: Connection refused
root@focal2-2:~#

root@focal2-2:~# telnet 10.10.18.148 zebra
Trying 10.10.18.148...
telnet: Unable to connect to remote host: Connection refused
root@focal2-2:~# sysctl -a | grep forward
net.ipv4.conf.all.bc_forwarding = 0
net.ipv4.conf.all.forwarding = 0
net.ipv4.conf.all.mc_forwarding = 1
net.ipv4.conf.default.bc_forwarding = 0
net.ipv4.conf.default.forwarding = 0
net.ipv4.conf.default.mc_forwarding = 0
net.ipv4.conf.ens3.bc_forwarding = 0
net.ipv4.conf.ens3.forwarding = 0
net.ipv4.conf.ens3.mc_forwarding = 0
net.ipv4.conf.lo.bc_forwarding = 0
net.ipv4.conf.lo.forwarding = 0
net.ipv4.conf.lo.mc_forwarding = 0
net.ipv4.ip_forward = 0
net.ipv4.ip_forward_update_priority = 1
net.ipv4.ip_forward_use_pmtu = 0
net.ipv6.conf.all.forwarding = 0
net.ipv6.conf.all.mc_forwarding = 0
net.ipv6.conf.default.forwarding = 0
net.ipv6.conf.default.mc_forwarding = 0
net.ipv6.conf.ens3.forwarding = 0
net.ipv6.conf.ens3.mc_forwarding = 0
net.ipv6.conf.lo.forwarding = 0
net.ipv6.conf.lo.mc_forwarding = 0
root@focal2-2:~#

http://infroref.org/i6230vlabnet7-OSPF.htm

root@focal:/etc/frr# vtysh

Hello, this is FRRouting (version 7.2.1).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

focal# show ip ospf interface out
No such interface name

focal#

focal# configure terminal
focal(config)# interface out
focal(config-if)# ip ospf hello-interval 1
focal(config-if)# ip ospf dead-interval 6
focal(config-if)# end


focal# show ip ospf interface out
out is down
  ifindex 0, MTU 0 bytes, BW 0 Mbit <>
  OSPF not enabled on this interface

focal#

focal# show ip ospf interface 
ens3 is up
  ifindex 2, MTU 1500 bytes, BW 4294967295 Mbit <UP,BROADCAST,RUNNING,MULTICAST>
  Internet Address 10.10.18.148/24, Broadcast 10.10.18.255, Area 0.0.0.1
  MTU mismatch detection: enabled
  Router ID 10.10.18.148, Network Type BROADCAST, Cost: 1
  Transmit Delay is 1 sec, State DR, Priority 1
  No backup designated router on this network
  Multicast group memberships: OSPFAllRouters OSPFDesignatedRouters
  Timer intervals configured, Hello 10s, Dead 40s, Wait 40s, Retransmit 5
    Hello due in 2.774s
  Neighbor Count is 0, Adjacent neighbor count is 0

focal#

focal# sh ip ospf interface ens3
ens3 is up
  ifindex 2, MTU 1500 bytes, BW 4294967295 Mbit <UP,BROADCAST,RUNNING,MULTICAST>
  Internet Address 10.10.18.148/24, Broadcast 10.10.18.255, Area 0.0.0.1
  MTU mismatch detection: enabled
  Router ID 10.10.18.148, Network Type BROADCAST, Cost: 1
  Transmit Delay is 1 sec, State DR, Priority 1
  No backup designated router on this network
  Multicast group memberships: OSPFAllRouters OSPFDesignatedRouters
  Timer intervals configured, Hello 10s, Dead 40s, Wait 40s, Retransmit 5
    Hello due in 3.114s
  Neighbor Count is 0, Adjacent neighbor count is 0

focal#

focal2-2(config)# int ens3
focal2-2(config-if)# ip ospf network point-to-point
focal2-2(config-if)# end
focal2-2# end
focal2-2# wr
Note: this version of vtysh never writes vtysh.conf
Building Configuration...
Integrated configuration saved to /etc/frr/frr.conf
[OK]
focal2-2# show ip ospf int ens3
ens3 is up
  ifindex 2, MTU 1500 bytes, BW 4294967295 Mbit <UP,BROADCAST,RUNNING,MULTICAST>
  Internet Address 10.10.18.152/24, Broadcast 10.10.18.255, Area 0.0.0.0
  MTU mismatch detection: enabled
  Router ID 10.10.18.152, Network Type POINTOPOINT, Cost: 1
  Transmit Delay is 1 sec, State Point-To-Point, Priority 1
  No backup designated router on this network
  Multicast group memberships: OSPFAllRouters
  Timer intervals configured, Hello 10s, Dead 40s, Wait 40s, Retransmit 5
    Hello due in 2.447s
  Neighbor Count is 0, Adjacent neighbor count is 0

focal2-2#

tcpdump -i ens3  proto ospf  -env

focal2-2# show ip ospf database router 

       OSPF Router with ID (10.10.18.152)


                Router Link States (Area 0.0.0.0)

  LS age: 680
  Options: 0x2  : *|-|-|-|-|-|E|-
  LS Flags: 0x3  
  Flags: 0x0
  LS Type: router-LSA
  Link State ID: 10.10.18.152 
  Advertising Router: 10.10.18.152
  LS Seq Number: 80000005
  Checksum: 0x9911
  Length: 36

   Number of Links: 1

    Link connected to: Stub Network
     (Link ID) Net: 10.10.18.0
     (Link Data) Network Mask: 255.255.255.0
      Number of TOS metrics: 0
       TOS 0 Metric: 1


focal2-2#

【配置问题】
1、OSPF邻居的hello及dead interval值不一致

  定位方法：a、检查双方配置
               b、通过debug ospf hello，比较收发的hello报文中的hello及dead interval值

  处理方法：修改双发的hello及dead interva一致即可

2、OSPF验证配置错误

  定位方法：a、检查双方配置
               b、通过debug ospf hello，比较收发的hello报文中的认证部分
               c、查看disp ospf error中“OSPF: wrong authentication key"或者0: OSPF: wrong authentication type是否一直增长

  处理方法：修改双发的认证参数即可

3.、该接口根本就没有启动OSPF

  定位方法：a、检查双方配置
               b、通过debug ospf int，查看该端口是否使能ospf

  处理方法：修改双发的配置，在接口上使能ospf即可

4、OSPF网络类型是NBMA的，但你忘记在OSPF协议模式下配置邻居了

  定位方法：a、检查双方配置,如果network-type为NBMA，看是否手工配置了邻居

  处理方法：修改配置，手工指定邻居即可

5、OSPF网络类型是NBMA的，你配置了邻居，但在诸如Frame relay的map语句中忘记加broadcast关键字了，导致协议报文不能到达对方

  定位方法：a、检查双方配置,如果network-type为NBMA，且使用FR作为链路层协议，确认是否添加broadcast参数

  处理方法：修改配置，在fr map 中添加broadcast参数即可

6、OSPF链路两端的网络类型不一致

  定位方法：a、检查双方配置
               b、接口默认的网络类型：
                             ospf网络类型          链路层协议
                                 p2p             PPP、loopback
                              NBMA             fr，x25，HDLC
                              p2mp                      无
                              broadcast             Ethernet

  处理方法：修改配置，修改双方的网络类型一致即可

7、区域号不一致

  定位方法：a、检查双方配置
               b、debug ospf packet，查看双方area是否一致

  处理方法：修改配置，修改双方的区域一致即可

8、链路的网络地址不一致，注意检查两边的mask

  定位方法：a、检查双方配置，ospf不会在不同网段接口之间建立邻居关系

  处理方法：修改配置，修改双方的地址为同一网段即可

9、在Stub或NSSA区域，有些路由器没有配置成Stub或NSSA

  定位方法：a、检查双方配置，ospf要求所用stub或NSSA区域内的路由器都要配置成同样的area类型

  处理方法：修改配置，修改Stub或NSSA区域所有的路由器具备一样的区域类型

posted on 2020-07-23 16:00 tycoon3 阅读(692) 评论(0) 收藏举报

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