添加二级路由不可堆叠交换机组

网络工程 路由 转变 VLAN 生成树 冗余
2021-07-17 04:14:14

我相信我遗漏了一些明显的东西。我正在使用 GNS3 来试验有两条通往 CORE 网络的路径。见图片。配置按我的想象工作，我可以从每个交换机 ping VLAN212 内的每个其他交换机。我还可以从 VLAN212 域中的其他交换机 ping CORE 交换机的环回。生成树将 SW-C f/15 置于块模式，这很好，因为这组交换机是第 2 层环路。问题是，如果我删除环路中的任何链接，拓扑将无法恢复。我认为生成树只需要 30 秒即可重新计算，但其他原因阻止每个交换机相互 ping ......即使在本地化 VLAN 212 中。我的意思是如果我从 SW-A 中删除链接 --> SW -C。我无法再从 SW-C 任何交换机甚至 CORE 交换机 ping 通。

也许我以错误的方式解决这个问题。如果有更好的方法来获得一组不可堆叠交换机的辅助路径，请告诉我。我试图摆脱这样一个事实，即这些不可堆叠的交换机是菊花链式的，只有 1 个交换机具有通往核心的路径。

任何，我感谢你的帮助。谢谢！

图片。在此处输入图片说明

链接完好的生成树输出 SW-C：

SW-C#show spanning-tree brief

VLAN212
  Spanning tree enabled protocol ieee
  Root ID    Priority    32768
             Address     c801.2308.0001
             Cost        19
             Port        55 (FastEthernet1/14)
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32768
             Address     c802.2308.0000
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 300

Interface                                   Designated
Name                 Port ID Prio Cost  Sts Cost  Bridge ID            Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet1/14     128.55   128    19 FWD     0 32768 c801.2308.0001 128.56
FastEthernet1/15     128.56   128    19 FWD    19 32768 c802.2308.0000 128.56

SW-C#ping 1.1.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/45/84 ms

删除从 SW-A 到 SW-C 的链接

SW-C#show spanning-tree bri

VLAN212
  Spanning tree enabled protocol ieee
  Root ID    Priority    32768
             Address     c801.2308.0001
             Cost        19
             Port        55 (FastEthernet1/14)
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32768
             Address     c802.2308.0000
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 300

Interface                                   Designated
Name                 Port ID Prio Cost  Sts Cost  Bridge ID            Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet1/14     128.55   128    19 FWD     0 32768 c801.2308.0001 128.56
FastEthernet1/15     128.56   128    19 FWD    19 32768 c802.2308.0000 128.56

SW-C#
*Mar  1 00:09:52.311: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.0.0.11 (Vla                                                                             n212) is down: holding time expired
SW-C#
*Mar  1 00:09:55.903: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.0.0.2 (Vlan                                                                             212) is down: holding time expired
SW-C#ping 1.1.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

添加软件 RUNNING_CONFIGS

核

version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname CORE
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 15
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
!
!
!
!
ip tcp synwait-time 5
!
!
interface Loopback0
 ip address 1.1.1.1 255.255.255.0
!
interface Loopback1
 ip address 2.2.2.2 255.255.255.0
!
interface Loopback2
 ip address 3.3.3.3 255.255.255.0
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
!
interface FastEthernet1/1
 switchport access vlan 295
!
interface FastEthernet1/2
 switchport access vlan 296
!
interface FastEthernet1/3
!
interface FastEthernet1/4
!
interface FastEthernet1/5
!
interface FastEthernet1/6
!
interface FastEthernet1/7
!
interface FastEthernet1/8
!
interface FastEthernet1/9
!
interface FastEthernet1/10
!
interface FastEthernet1/11
!
interface FastEthernet1/12
!
interface FastEthernet1/13
!
interface FastEthernet1/14
!
interface FastEthernet1/15
!
interface Vlan1
 no ip address
!
interface Vlan295
 ip address 172.16.0.1 255.255.255.0
 ip summary-address eigrp 1 0.0.0.0 0.0.0.0
!
interface Vlan296
 ip address 172.16.1.1 255.255.255.0
 ip summary-address eigrp 1 0.0.0.0 0.0.0.0
!
router eigrp 1
 network 172.16.0.0 0.0.0.255
 network 172.16.1.0 0.0.0.255
 no auto-summary
!
ip forward-protocol nd
!
no ip http server
no ip http secure-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

SW-A

version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SW-A
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 15
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
!
!
!
!
ip tcp synwait-time 5
!
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
!
interface FastEthernet1/1
 switchport access vlan 295
!
interface FastEthernet1/2
!
interface FastEthernet1/3
!
interface FastEthernet1/4
!
interface FastEthernet1/5
!
interface FastEthernet1/6
!
interface FastEthernet1/7
!
interface FastEthernet1/8
!
interface FastEthernet1/9
!
interface FastEthernet1/10
!
interface FastEthernet1/11
!
interface FastEthernet1/12
!
interface FastEthernet1/13
!
interface FastEthernet1/14
 switchport access vlan 212
!
interface FastEthernet1/15
 switchport access vlan 212
!
interface Vlan1
 no ip address
!
interface Vlan212
 ip address 10.0.0.1 255.255.255.0
!
interface Vlan295
 ip address 172.16.0.2 255.255.255.0
!
router eigrp 1
 network 0.0.0.0
 no auto-summary
!
ip forward-protocol nd
!
no ip http server
no ip http secure-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

SW-B

version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SW-B
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 15
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
!
!
!
!
ip tcp synwait-time 5
!
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
!
interface FastEthernet1/1
 switchport access vlan 296
!
interface FastEthernet1/2
!
interface FastEthernet1/3
!
interface FastEthernet1/4
!
interface FastEthernet1/5
!
interface FastEthernet1/6
!
interface FastEthernet1/7
!
interface FastEthernet1/8
!
interface FastEthernet1/9
!
interface FastEthernet1/10
!
interface FastEthernet1/11
!
interface FastEthernet1/12
!
interface FastEthernet1/13
!
interface FastEthernet1/14
 switchport access vlan 212
!
interface FastEthernet1/15
 switchport access vlan 212
!
interface Vlan1
 no ip address
!
interface Vlan212
 ip address 10.0.0.2 255.255.255.0
!
interface Vlan296
 ip address 172.16.1.2 255.255.255.0
!
router eigrp 1
 network 0.0.0.0
 no auto-summary
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
mac-address-table static c809.094c.0000 interface FastEthernet1/14 vlan 1
!
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

SW-C

version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SW-C
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 15
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
!
!
!
!
ip tcp synwait-time 5
!
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
!
interface FastEthernet1/1
!
interface FastEthernet1/2
!
interface FastEthernet1/3
!
interface FastEthernet1/4
!
interface FastEthernet1/5
!
interface FastEthernet1/6
!
interface FastEthernet1/7
!
interface FastEthernet1/8
!
interface FastEthernet1/9
!
interface FastEthernet1/10
!
interface FastEthernet1/11
!
interface FastEthernet1/12
!
interface FastEthernet1/13
!
interface FastEthernet1/14
 switchport access vlan 212
!
interface FastEthernet1/15
 switchport access vlan 212
!
interface Vlan1
 no ip address
!
interface Vlan212
 ip address 10.0.0.10 255.255.255.0
!
router eigrp 1
 network 0.0.0.0
 no auto-summary
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
mac-address-table static c80a.094c.0000 interface FastEthernet1/15 vlan 212
!
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

SW-D

version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SW-D
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 15
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
!
!
!
!
ip tcp synwait-time 5
!
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
!
interface FastEthernet1/1
!
interface FastEthernet1/2
!
interface FastEthernet1/3
!
interface FastEthernet1/4
!
interface FastEthernet1/5
!
interface FastEthernet1/6
!
interface FastEthernet1/7
!
interface FastEthernet1/8
!
interface FastEthernet1/9
!
interface FastEthernet1/10
!
interface FastEthernet1/11
!
interface FastEthernet1/12
!
interface FastEthernet1/13
!
interface FastEthernet1/14
 switchport access vlan 212
!
interface FastEthernet1/15
 switchport access vlan 212
!
interface Vlan1
 no ip address
!
interface Vlan212
 ip address 10.0.0.11 255.255.255.0
!
router eigrp 1
 network 0.0.0.0
 no auto-summary
!
ip forward-protocol nd
!
no ip http server
no ip http secure-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

这是删除 SW C 和 B 之间的链接，然后阅读链接的示例。

SW-C#ping 1.1.1.1 repeat 100000

Type escape sequence to abort.
Sending 100000, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!........
*Mar  1 00:32:23.183: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.0.0.2 (Vlan212) is down: holding time expired................!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
*Mar  1 00:32:55.739: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.0.0.2 (Vlan212) is up: new adjacency!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!..........................................
.........................................................

出于某种原因，它永远不会恢复......

2个回答

跳出来的第一件事是你说你删除了从A到C的链接，但是fa 1/14仍然处于转发状态。这意味着端口仍在运行。

我注意到的第二件事是根端口也是 1/14，这意味着它已启动并听到来自 sw A 的 BPDU。所以我猜你并没有真正删除从 A 到 C 的链接，而是阻止了其他一些大大地。

这是 GNS3 的问题。如果您尝试右键单击并删除链接，GNS3 仍会向每个交换机报告链接仍然存在。使用“shutdown”命令关闭链接中涉及的接口。

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