MSTP+VRRP配置问题，一直ping不通网关，求解决！

燕麦包 · 发表于 2017-3-23 10:44:52

本帖最后由燕麦包于 2017-3-23 15:56 编辑

用IOU做MSTP+VRRP实验，PC1一直ping不通网关，找不出原因，希望有大神能帮我解决一下问题!（我只有PC1做测试）

实验拓扑：

拓扑图

以下是各交换机配置信息，可以直接导入去测试

SW1配置信息：
SW1#show run
Building configuration...

Current configuration : 2284 bytes
!
! Last configuration change at 02:07:40 UTC Thu Mar 23 2017
!
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
!
hostname SW1
!
boot-start-marker
boot-end-marker
!
!
logging discriminator EXCESS severity drops 6 msg-body drops EXCESSCOLL
logging buffered 50000
logging console discriminator EXCESS
!
no aaa new-model
no ip icmp rate-limit unreachable
!
ip cef
!
!
no ip domain-lookup
no ipv6 cef
ipv6 multicast rpf use-bgp
!
!
!
!
!
!
!
!
spanning-tree mode mst
spanning-tree extend system-id
!
spanning-tree mst configuration
name test
revision 1
instance 1 vlan 10, 20
instance 2 vlan 30, 40
!
spanning-tree mst 1 priority 4096
spanning-tree mst 2 priority 8192
!
!
!
!
vlan internal allocation policy ascending
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
interface Ethernet0/0
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
!
interface Ethernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
!
interface Ethernet0/2
duplex auto
!
interface Ethernet0/3
duplex auto
!
interface Ethernet1/0
duplex auto
!
interface Ethernet1/1
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
!
interface Ethernet1/2
duplex auto
!
interface Ethernet1/3
duplex auto
!
interface Ethernet2/0
duplex auto
!
interface Ethernet2/1
duplex auto
!
interface Ethernet2/2
duplex auto
!
interface Ethernet2/3
duplex auto
!
interface Ethernet3/0
duplex auto
!
interface Ethernet3/1
duplex auto
!
interface Ethernet3/2
duplex auto
!
interface Ethernet3/3
duplex auto
!
interface Vlan1
no ip address
shutdown
!
interface Vlan10
ip address 192.168.10.252 255.255.255.0
vrrp 10 ip 192.168.10.254
vrrp 10 priority 120
!
interface Vlan20
ip address 192.168.20.252 255.255.255.0
vrrp 20 ip 192.168.20.254
vrrp 20 priority 120
!
interface Vlan30
ip address 192.168.30.252 255.255.255.0
vrrp 30 ip 192.168.30.254
!
interface Vlan40
ip address 192.168.40.252 255.255.255.0
vrrp 40 ip 192.168.40.254
!
!
no ip http server
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
end

SW2配置信息：
SW2#show run
Building configuration...

Current configuration : 2284 bytes
!
! Last configuration change at 02:14:24 UTC Thu Mar 23 2017
!
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
!
hostname SW2
!
boot-start-marker
boot-end-marker
!
!
logging discriminator EXCESS severity drops 6 msg-body drops EXCESSCOLL
logging buffered 50000
logging console discriminator EXCESS
!
no aaa new-model
no ip icmp rate-limit unreachable
!
ip cef
!
!
no ip domain-lookup
no ipv6 cef
ipv6 multicast rpf use-bgp
!
!
!
!
!
!
!
!
spanning-tree mode mst
spanning-tree extend system-id
!
spanning-tree mst configuration
name test
revision 1
instance 1 vlan 10, 20
instance 2 vlan 30, 40
!
spanning-tree mst 1 priority 8192
spanning-tree mst 2 priority 4096
!
!
!
!
vlan internal allocation policy ascending
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
interface Ethernet0/0
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
!
interface Ethernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
!
interface Ethernet0/2
duplex auto
!
interface Ethernet0/3
duplex auto
!
interface Ethernet1/0
duplex auto
!
interface Ethernet1/1
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
!
interface Ethernet1/2
duplex auto
!
interface Ethernet1/3
duplex auto
!
interface Ethernet2/0
duplex auto
!
interface Ethernet2/1
duplex auto
!
interface Ethernet2/2
duplex auto
!
interface Ethernet2/3
duplex auto
!
interface Ethernet3/0
duplex auto
!
interface Ethernet3/1
duplex auto
!
interface Ethernet3/2
duplex auto
!
interface Ethernet3/3
duplex auto
!
interface Vlan1
no ip address
shutdown
!
interface Vlan10
ip address 192.168.10.253 255.255.255.0
vrrp 10 ip 192.168.10.254
!
interface Vlan20
ip address 192.168.20.253 255.255.255.0
vrrp 20 ip 192.168.20.254
!
interface Vlan30
ip address 192.168.30.253 255.255.255.0
vrrp 30 ip 192.168.30.254
vrrp 30 priority 120
!
interface Vlan40
ip address 192.168.40.253 255.255.255.0
vrrp 40 ip 192.168.40.254
vrrp 40 priority 120
!
!
no ip http server
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
end

SW3配置信息：
SW3#show run
Building configuration...

Current configuration : 1897 bytes
!
! Last configuration change at 02:16:30 UTC Thu Mar 23 2017
!
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
!
hostname SW3
!
boot-start-marker
boot-end-marker
!
!
logging discriminator EXCESS severity drops 6 msg-body drops EXCESSCOLL
logging buffered 50000
logging console discriminator EXCESS
!
no aaa new-model
no ip routing
no ip icmp rate-limit unreachable
!
no ip cef
!
!
no ip domain-lookup
no ipv6 cef
ipv6 multicast rpf use-bgp
!
!
!
!
!
!
!
!
spanning-tree mode mst
spanning-tree extend system-id
!
spanning-tree mst configuration
name test
revision 1
instance 1 vlan 10, 20
instance 2 vlan 30, 40
!
!
!
!
!
vlan internal allocation policy ascending
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
interface Ethernet0/0
switchport access vlan 10
duplex auto
!
interface Ethernet0/1
switchport access vlan 20
duplex auto
!
interface Ethernet0/2
duplex auto
!
interface Ethernet0/3
duplex auto
!
interface Ethernet1/0
duplex auto
!
interface Ethernet1/1
duplex auto
!
interface Ethernet1/2
duplex auto
!
interface Ethernet1/3
duplex auto
!
interface Ethernet2/0
duplex auto
!
interface Ethernet2/1
duplex auto
!
interface Ethernet2/2
duplex auto
!
interface Ethernet2/3
duplex auto
!
interface Ethernet3/0
duplex auto
!
interface Ethernet3/1
duplex auto
!
interface Ethernet3/2
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
!
interface Ethernet3/3
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
!
interface Vlan1
no ip address
no ip route-cache
shutdown
!
!
no ip http server
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
end

SW4配置信息：
SW4# show run
Building configuration...

Current configuration : 1907 bytes
!
! Last configuration change at 02:18:44 UTC Thu Mar 23 2017
!
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
!
hostname SW4
!
boot-start-marker
boot-end-marker
!
!
logging discriminator EXCESS severity drops 6 msg-body drops EXCESSCOLL
logging buffered 50000
logging console discriminator EXCESS
!
no aaa new-model
no ip routing
no ip icmp rate-limit unreachable
!
no ip cef
!
!
no ip domain-lookup
no ipv6 cef
ipv6 multicast rpf use-bgp
!
!
!
!
!
!
!
!
spanning-tree mode mst
spanning-tree extend system-id
!
spanning-tree mst configuration
name test
revision 1
instance 1 vlan 10, 20
instance 2 vlan 30, 40
!
!
!
!
!
vlan internal allocation policy ascending
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
!
interface Ethernet0/0
switchport access vlan 30
duplex auto
!
interface Ethernet0/1
switchport access vlan 40
duplex auto
!
interface Ethernet0/2
switchport access vlan 10
duplex auto
!
interface Ethernet0/3
switchport access vlan 20
duplex auto
!
interface Ethernet1/0
duplex auto
!
interface Ethernet1/1
duplex auto
!
interface Ethernet1/2
duplex auto
!
interface Ethernet1/3
duplex auto
!
interface Ethernet2/0
duplex auto
!
interface Ethernet2/1
duplex auto
!
interface Ethernet2/2
duplex auto
!
interface Ethernet2/3
duplex auto
!
interface Ethernet3/0
duplex auto
!
interface Ethernet3/1
duplex auto
!
interface Ethernet3/2
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
!
interface Ethernet3/3
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
!
interface Vlan1
no ip address
no ip route-cache
shutdown
!
!
no ip http server
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
end

添加了两条命令：在SW1和SW2上做了MST 0的主备根：
SW1(config)#spanning-tree mst 0 root primary
SW2(config)#spanning-tree mst 0 root secondary

新的spanning-tree信息：

SW1的spanning-tree信息：
SW1#show spanning-tree

MST0
  Spanning tree enabled protocol mstp
  Root ID Priority 24576
         Address    aabb.cc00.0300
         This bridge is the root
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 24576  (priority 24576 sys-id-ext 0)
         Address    aabb.cc00.0300
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/0             Desg FWD 2000000 128.1 Shr
Et0/1             Desg FWD 2000000 128.2 Shr
Et0/2             Desg FWD 2000000 128.3 Shr
Et0/3             Desg FWD 2000000 128.4 Shr
Et1/0             Desg FWD 2000000 128.5 Shr
Et1/1             Desg FWD 2000000 128.6 Shr
Et1/2             Desg FWD 2000000 128.7 Shr
Et1/3             Desg FWD 2000000 128.8 Shr
Et2/0             Desg FWD 2000000 128.9 Shr

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------

Et2/1             Desg FWD 2000000 128.10 Shr
Et2/2             Desg FWD 2000000 128.11 Shr
Et2/3             Desg FWD 2000000 128.12 Shr
Et3/0             Desg FWD 2000000 128.13 Shr
Et3/1             Desg FWD 2000000 128.14 Shr
Et3/2             Desg FWD 2000000 128.15 Shr
Et3/3             Desg FWD 2000000 128.16 Shr

MST1
  Spanning tree enabled protocol mstp
  Root ID Priority 4097
         Address    aabb.cc00.0300
         This bridge is the root
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 4097 (priority 4096 sys-id-ext 1)
         Address    aabb.cc00.0300
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/0             Desg FWD 2000000 128.1 Shr
Et0/1             Desg FWD 2000000 128.2 Shr
Et1/1             Desg FWD 2000000 128.6 Shr

MST2
  Spanning tree enabled protocol mstp
  Root ID Priority 4098
         Address    aabb.cc00.0400
         Cost       2000000
         Port       6 (Ethernet1/1)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 8194 (priority 8192 sys-id-ext 2)
         Address    aabb.cc00.0300
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/0             Desg FWD 2000000 128.1 Shr
Et0/1             Desg FWD 2000000 128.2 Shr
Et1/1             Root FWD 2000000 128.6 Shr

SW2的spanning-tree信息：
SW2#show spanning-tree

MST0
  Spanning tree enabled protocol mstp
  Root ID Priority 24576
         Address    aabb.cc00.0300
         Cost       0
         Port       6 (Ethernet1/1)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 28672  (priority 28672 sys-id-ext 0)
         Address    aabb.cc00.0400
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/0             Desg FWD 2000000 128.1 Shr
Et0/1             Desg FWD 2000000 128.2 Shr
Et0/2             Desg FWD 2000000 128.3 Shr
Et0/3             Desg FWD 2000000 128.4 Shr
Et1/0             Desg FWD 2000000 128.5 Shr
Et1/1             Root FWD 2000000 128.6 Shr
Et1/2             Desg FWD 2000000 128.7 Shr
Et1/3             Desg FWD 2000000 128.8 Shr

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------

Et2/0             Desg FWD 2000000 128.9 Shr
Et2/1             Desg FWD 2000000 128.10 Shr
Et2/2             Desg FWD 2000000 128.11 Shr
Et2/3             Desg FWD 2000000 128.12 Shr
Et3/0             Desg FWD 2000000 128.13 Shr
Et3/1             Desg FWD 2000000 128.14 Shr
Et3/2             Desg FWD 2000000 128.15 Shr
Et3/3             Desg FWD 2000000 128.16 Shr

MST1
  Spanning tree enabled protocol mstp
  Root ID Priority 4097
         Address    aabb.cc00.0300
         Cost       2000000
         Port       6 (Ethernet1/1)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 8193 (priority 8192 sys-id-ext 1)
         Address    aabb.cc00.0400
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/0             Desg FWD 2000000 128.1 Shr
Et0/1             Desg FWD 2000000 128.2 Shr
Et1/1             Root FWD 2000000 128.6 Shr

MST2
  Spanning tree enabled protocol mstp
  Root ID Priority 4098
         Address    aabb.cc00.0400
         This bridge is the root
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 4098 (priority 4096 sys-id-ext 2)
         Address    aabb.cc00.0400
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/0             Desg FWD 2000000 128.1 Shr
Et0/1             Desg FWD 2000000 128.2 Shr
Et1/1             Desg FWD 2000000 128.6 Shr

SW3的spanning-tree信息：
SW3#show spanning-tree

MST0
  Spanning tree enabled protocol mstp
  Root ID Priority 24576
         Address    aabb.cc00.0300
         Cost       0
         Port       16 (Ethernet3/3)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32768  (priority 32768 sys-id-ext 0)
         Address    aabb.cc00.0100
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/0             Desg FWD 2000000 128.1 Shr
Et0/1             Desg FWD 2000000 128.2 Shr
Et0/2             Desg FWD 2000000 128.3 Shr
Et0/3             Desg FWD 2000000 128.4 Shr
Et1/0             Desg FWD 2000000 128.5 Shr
Et1/1             Desg FWD 2000000 128.6 Shr
Et1/2             Desg FWD 2000000 128.7 Shr
Et1/3             Desg FWD 2000000 128.8 Shr

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------

Et2/0             Desg FWD 2000000 128.9 Shr
Et2/1             Desg FWD 2000000 128.10 Shr
Et2/2             Desg FWD 2000000 128.11 Shr
Et2/3             Desg FWD 2000000 128.12 Shr
Et3/0             Desg FWD 2000000 128.13 Shr
Et3/1             Desg FWD 2000000 128.14 Shr
Et3/2             Altn BLK 2000000 128.15 Shr
Et3/3             Root FWD 2000000 128.16 Shr

MST1
  Spanning tree enabled protocol mstp
  Root ID Priority 4097
         Address    aabb.cc00.0300
         Cost       2000000
         Port       16 (Ethernet3/3)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32769  (priority 32768 sys-id-ext 1)
         Address    aabb.cc00.0100
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/0             Desg FWD 2000000 128.1 Shr
Et0/1             Desg FWD 2000000 128.2 Shr
Et3/2             Altn BLK 2000000 128.15 Shr
Et3/3             Root FWD 2000000 128.16 Shr

MST2
  Spanning tree enabled protocol mstp
  Root ID Priority 4098
         Address    aabb.cc00.0400
         Cost       2000000
         Port       15 (Ethernet3/2)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32770  (priority 32768 sys-id-ext 2)
         Address    aabb.cc00.0100
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/2             Desg FWD 2000000 128.3 Shr
Et0/3             Desg FWD 2000000 128.4 Shr
Et3/2             Root FWD 2000000 128.15 Shr
Et3/3             Altn BLK 2000000 128.16 Shr

SW4的spanning-tree信息：
SW4# show spanning-tree

MST0
  Spanning tree enabled protocol mstp
  Root ID Priority 24576
         Address    aabb.cc00.0300
         Cost       0
         Port       15 (Ethernet3/2)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32768  (priority 32768 sys-id-ext 0)
         Address    aabb.cc00.0200
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/0             Desg FWD 2000000 128.1 Shr
Et0/1             Desg FWD 2000000 128.2 Shr
Et0/2             Desg FWD 2000000 128.3 Shr
Et0/3             Desg FWD 2000000 128.4 Shr
Et1/0             Desg FWD 2000000 128.5 Shr
Et1/1             Desg FWD 2000000 128.6 Shr
Et1/2             Desg FWD 2000000 128.7 Shr
Et1/3             Desg FWD 2000000 128.8 Shr

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------

Et2/0             Desg FWD 2000000 128.9 Shr
Et2/1             Desg FWD 2000000 128.10 Shr
Et2/2             Desg FWD 2000000 128.11 Shr
Et2/3             Desg FWD 2000000 128.12 Shr
Et3/0             Desg FWD 2000000 128.13 Shr
Et3/1             Desg FWD 2000000 128.14 Shr
Et3/2             Root FWD 2000000 128.15 Shr
Et3/3             Altn BLK 2000000 128.16 Shr

MST1
  Spanning tree enabled protocol mstp
  Root ID Priority 4097
         Address    aabb.cc00.0300
         Cost       2000000
         Port       15 (Ethernet3/2)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32769  (priority 32768 sys-id-ext 1)
         Address    aabb.cc00.0200
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/2             Desg FWD 2000000 128.3 Shr
Et0/3             Desg FWD 2000000 128.4 Shr
Et3/2             Root FWD 2000000 128.15 Shr
Et3/3             Altn BLK 2000000 128.16 Shr

MST2
  Spanning tree enabled protocol mstp
  Root ID Priority 4098
         Address    aabb.cc00.0400
         Cost       2000000
         Port       16 (Ethernet3/3)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32770  (priority 32768 sys-id-ext 2)
         Address    aabb.cc00.0200
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface          Role Sts Cost    Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/0             Desg FWD 2000000 128.1 Shr
Et0/1             Desg FWD 2000000 128.2 Shr
Et3/2             Altn BLK 2000000 128.15 Shr
Et3/3             Root FWD 2000000 128.16 Shr

SW1的VRRP信息：
SW1#show vrrp brief
Interface       Grp Pri Time  Own Pre State Master addr    Group addr
Vl10             10  120 3531    Y  Master  192.168.10.252  192.168.10.254
Vl20             20  120 3531    Y  Master  192.168.20.252  192.168.20.254
Vl30             30  100 3609    Y  Backup  192.168.30.253  192.168.30.254
Vl40             40  100 3609    Y  Backup  192.168.40.253  192.168.40.254

SW2的VRRP信息：
SW2#show vrrp brief
Interface       Grp Pri Time  Own Pre State Master addr    Group addr
Vl10             10  100 3609    Y  Backup  192.168.10.252  192.168.10.254
Vl20             20  100 3609    Y  Backup  192.168.20.252  192.168.20.254
Vl30             30  120 3531    Y  Master  192.168.30.253  192.168.30.254
Vl40             40  120 3531    Y  Master  192.168.40.253  192.168.40.254

本来各个实例的接口是正常的，只要用PC去ping 192.168.10.252 就出现异常了，SW1出现假死，实例的接口有问题，如下图：ping 192.168.10.252

ping

实例 0：

MSTP 0

实例 1：

MSTP 2

实例 2：

发现ARP有点奇怪所有SVI的MAC地址都是一样的：
SW1的ARP表：

SW1ARP

SW2的ARP表：

SW2ARP

路由表也没有VRRP的虚拟地址，把VRRP去掉，用PC1去ping真实地址（192.168.10.252和192.168.10.253）有时候通有时候不通，交换机总会卡死一下，过一会就好，总感觉有环路，但是又找不出在哪，希望有大神指点！

Simet_Zheng · 发表于 2017-3-23 10:44:53

应该是你的生成树的地方出问题了，你看还有地方出于LRN状态，应该是一直出于收敛不了的状态，所以去掉VRRP之后有时通有时不通，你的生成树的LINK TYPE改成P2P类型试试，SHARE模式应该是半双工时自动协商的LINK TYPE，可能会影响传输，你先把所有的link type改了P2P看看行不行的通

visionary · 发表于 2017-3-23 11:32:48

就算开了MST，最好VLAN1也要在主备交换上互为主备根，防止vlan1在主备交换机上出现BLK端口。。。
说得不详细。。。
什么ping什么不通？
哪里ping 哪里不通？

燕麦包 · 发表于 2017-3-23 11:47:07

visionary 发表于 2017-3-23 11:32
就算开了MST，最好VLAN1也要在主备交换上互为主备根，防止vlan1在主备交换机上出现BLK端口。。 ...

现在给MST 0 也做了主备根。
用PC1去ping真实地址（192.168.10.252和192.168.10.253）有时候通有时候不通

Simet_Zheng · 发表于 2017-3-23 11:58:38

你看下你发的show的截图，SW3的e3/3接口还是处于LRN状态，所以说你的生成树有问题，后面的link type上也显示shr dispute，你就该去调link type ，spanning-tree link-type point-to-point

Simet_Zheng · 发表于 2017-3-23 11:58:45

你看下你发的show的截图，SW3的e3/3接口还是处于LRN状态，所以说你的生成树有问题，后面的link type上也显示shr dispute，你就该去调link type ，spanning-tree link-type point-to-point

燕麦包 · 发表于 2017-3-23 12:01:31

Simet_Zheng 发表于 2017-3-23 11:58
你看下你发的show的截图，SW3的e3/3接口还是处于LRN状态，所以说你的生成树有问题，后面的link type上也显 ...

这个是刚刚没收敛的时候截图的，我把上面的更新了，现在看端口是没问题的。

燕麦包 · 发表于 2017-3-23 12:02:18

Simet_Zheng 发表于 2017-3-23 11:37
应该是你的生成树的地方出问题了，你看还有地方出于LRN状态，应该是一直出于收敛不了的状态，所以去掉VRRP ...

重新show了一遍，现在没问题的，但是ping不通的问题依然存在。

visionary · 发表于 2017-3-23 14:24:53

把ip routing开了，把以太网口都手动全双工试下，查下各接口下的arp表，把icmp debug
打开测试。

燕麦包 · 发表于 2017-3-23 15:45:36

visionary 发表于 2017-3-23 14:24
把ip routing开了，把以太网口都手动全双工试下，查下各接口下的arp表，把icmp debug
打开测试。

已经把所有交换机的所以接口都开启为全双工模式了，只有SW1和SW2有ARP信息，发现ARP的SVI的MAC地址都是一样的。发现本来MST的各个端口都是正常的，只要一ping，SW1出现假死，SW3的端口异常，过一会又恢复正常了。debug IP ICMP 只要SW1又信息，这个正常，因为只pingSW1上的IP。以下是图片：

ARP信息：
SW1

SW1ARP