拔掉网具开关会导致Cisco链路在远程交换机上掉线

Question

我有一个很奇怪的问题，我希望有人能给我一个关于去哪里看的想法。我有一个新的网络齿轮M 4100-D10-POE第二层管理开关，我们正在安装在一个远程建筑物。它通过CAT5电缆连接到out网络的其余部分，连接到思科交换机(我们有一些，它连接的地方似乎并不重要)。现在它可以正常工作了，但是当我关掉这个网具开关(或者把它从网络上拔下)时，我会收到一堆来自不同服务的电子邮件，表明其他两个思科交换机(一个催化剂3560和一个催化剂2960S)之间的网络连接丢失了。这些开关通过光纤线路相互连接。

奇怪的是，网具交换机没有直接连接到遭受链路故障的两个交换机中的任何一个。两者之间可以有1或2个思科交换机。我也没有在这两个开关上看到任何排序端口向上/向下的日志消息。我也知道这不是巧合，因为我可以在任何时候重新创建这个问题，只需插入和拔出网具开关。

我唯一的猜测是，这与BGP、STP或其他交换机到交换协议有关，但我不知道如何监控这一点。

更新:这是配置文件。首先是网具交换机：

!Current Configuration:
!
!System Description "M4100-D10-POE ProSafe 10-port FastEthernet L2+ Intelligent Edge PoE Desktop Managed Switch, 10.0.1.28, B1.0.0.9"
!System Software Version "10.0.1.28"
!System Up Time          "2 days 23 hrs 58 mins 15 secs"
!Additional Packages     QOS,IPv6 Management,Routing
!Current SNTP Synchronized Time: Mar  9 19:09:41 2015 UTC
!
network protocol none
network parms 172.16.112.68 255.255.240.0 172.16.112.4
vlan database
vlan 3-10,200
vlan name 3 "VOIP_HD"
vlan name 4 "CAMERA"
vlan name 5 "WIFI_MGMT"
vlan name 6 "WIFI_GUEST"
vlan name 7 "WIFI_DATA"
vlan name 8 "SAN_SATA"
vlan name 9 "SAN_SAS"
vlan name 10 "DMZ"
vlan name 200 "AUTOVOIP"
exit

ip ssh server enable
ip ssh protocol 2
no ip telnet server enable
configure
sntp server "172.16.112.6"
sntp server "0.north-america.pool.ntp.org" 2
sntp server "1.north-america.pool.ntp.org" 3
time-range
ip domain name "caymanport.com"
ip name server 172.16.112.6 172.16.112.23 172.16.112.9
snmptrap "CIPAread" ipaddr 172.16.112.65
voice vlan
no green-mode energy-detect
line console
no transport input telnet
exit

line telnet
exit

line ssh
exit

snmp-server sysname "CDCParts1Switch"
snmp-server location "CDC Taylor Parts Container"
snmp-server contact "IT Manager"
!
no snmp-server community public
no snmp-server community private
auto-voip vlan 200

interface 0/7
vlan participation include 2-3
vlan tagging 2-3
exit

interface 0/8
vlan participation include 2-3
vlan tagging 2-3
exit

interface 0/9
vlan participation include 2-10
vlan tagging 1-10
exit

interface 0/10
vlan participation include 2-10
vlan tagging 1-10
exit

no isdp run
no isdp advertise-v2
exit

现在思科3560交换机(CDCVOIPSwitch)：

Current configuration : 19392 bytes
!
! Last configuration change at 11:31:57 EST Fri Mar 6 2015
! NVRAM config last updated at 15:35:31 EST Tue Mar 3 2015
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log datetime
service password-encryption
service sequence-numbers
!
hostname CDCVoipSwitch
!
boot-start-marker
boot-end-marker
!
aaa new-model
!
aaa session-id common
clock timezone EST -5
system mtu routing 1500
ip routing
ip domain-name caymanport.com
ip name-server 172.16.112.6
ip name-server 172.16.112.23
ip name-server 172.16.112.9
!
mls qos map cos-dscp 0 8 16 26 32 46 48 56
mls qos srr-queue input bandwidth 90 10
mls qos srr-queue input threshold 1 8 16
mls qos srr-queue input threshold 2 34 66
mls qos srr-queue input buffers 67 33
mls qos srr-queue input cos-map queue 1 threshold 2 1
mls qos srr-queue input cos-map queue 1 threshold 3 0
mls qos srr-queue input cos-map queue 2 threshold 1 2
mls qos srr-queue input cos-map queue 2 threshold 2 4 6 7
mls qos srr-queue input cos-map queue 2 threshold 3 3 5
mls qos srr-queue input dscp-map queue 1 threshold 2 9 10 11 12 13 14 15
mls qos srr-queue input dscp-map queue 1 threshold 3 0 1 2 3 4 5 6 7
mls qos srr-queue input dscp-map queue 1 threshold 3 32
mls qos srr-queue input dscp-map queue 2 threshold 1 16 17 18 19 20 21 22 23
mls qos srr-queue input dscp-map queue 2 threshold 2 33 34 35 36 37 38 39 48
mls qos srr-queue input dscp-map queue 2 threshold 2 49 50 51 52 53 54 55 56
mls qos srr-queue input dscp-map queue 2 threshold 2 57 58 59 60 61 62 63
mls qos srr-queue input dscp-map queue 2 threshold 3 24 25 26 27 28 29 30 31
mls qos srr-queue input dscp-map queue 2 threshold 3 40 41 42 43 44 45 46 47
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 3 3 6 7
mls qos srr-queue output cos-map queue 3 threshold 3 2 4
mls qos srr-queue output cos-map queue 4 threshold 2 1
mls qos srr-queue output cos-map queue 4 threshold 3 0
mls qos srr-queue output dscp-map queue 1 threshold 3 40 41 42 43 44 45 46 47
mls qos srr-queue output dscp-map queue 2 threshold 3 24 25 26 27 28 29 30 31
mls qos srr-queue output dscp-map queue 2 threshold 3 48 49 50 51 52 53 54 55
mls qos srr-queue output dscp-map queue 2 threshold 3 56 57 58 59 60 61 62 63
mls qos srr-queue output dscp-map queue 3 threshold 3 16 17 18 19 20 21 22 23
mls qos srr-queue output dscp-map queue 3 threshold 3 32 33 34 35 36 37 38 39
mls qos srr-queue output dscp-map queue 4 threshold 1 8
mls qos srr-queue output dscp-map queue 4 threshold 2 9 10 11 12 13 14 15
mls qos srr-queue output dscp-map queue 4 threshold 3 0 1 2 3 4 5 6 7
mls qos queue-set output 1 threshold 1 138 138 92 138
mls qos queue-set output 1 threshold 2 138 138 92 400
mls qos queue-set output 1 threshold 3 36 77 100 318
mls qos queue-set output 1 threshold 4 20 50 67 400
mls qos queue-set output 2 threshold 1 149 149 100 149
mls qos queue-set output 2 threshold 2 118 118 100 235
mls qos queue-set output 2 threshold 3 41 68 100 272
mls qos queue-set output 2 threshold 4 42 72 100 242
mls qos queue-set output 1 buffers 10 10 26 54
mls qos queue-set output 2 buffers 16 6 17 61
mls qos
!
crypto pki trustpoint HTTPS_SS_CERT_KEYPAIR
 enrollment selfsigned
 serial-number
 revocation-check none
 rsakeypair HTTPS_SS_CERT_KEYPAIR
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
ip ssh time-out 60
ip ssh authentication-retries 2
!
interface FastEthernet0/1
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/2
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/3
 description vip5312-3752
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/4
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/5
 description vip5330-3757
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/6
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/7
 description vip5330-3756
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/8
 description vip5312-3759
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/9
 description vip5330-3755
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/10
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/11
 description vip5312-3758
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/12
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/13
 description vip5330-3754
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/14
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/15
 description vip5312-3732
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/16
 description camCDCNetRm
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/17
 description vip5312-3751
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/18
 description vip5312-3760
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/19
 description vip5312-3750
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/20
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/21
 description vip5312-3761
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/22
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/23
 description vip5312-3762
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/24
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/25
 description vip5312-3763
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/26
 switchport mode access
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/27
 description vip5312-3764
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/28
 description AP.Ware.Out.Corner
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/29
 description vip5312-3765
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/30
 description AP.Ware.Out.Center
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/31
 description vip5312-3766
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/32
 description WLC Port 2 (VL06)
 switchport access vlan 6
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/33
 description WLC Port 3 (VL07)
 switchport access vlan 7
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/34
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/35
 description vip5312-3753
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/36
 description AP.Mech
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk
 spanning-tree portfast
!
interface FastEthernet0/37
 description vip5312-3610
 switchport mode access
 switchport voice vlan 2
 switchport port-security aging type inactivity
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 macro description cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
!
interface FastEthernet0/38
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/39
 description WLC Port 4
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/40
 description WLC Port 1 (VL05)
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk
 spanning-tree portfast
!
interface FastEthernet0/41
 description AP.Warehouse02
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/42
 description AP.Warehouse03
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/43
 description AP.Warehouse01
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/44
 description AP.CDC.Dwnstairs
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/45
 description AP.CDC.Upstairs
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/46
 description AP.CDCGuard
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk
 switchport voice vlan 2
 spanning-tree portfast
!
interface FastEthernet0/47
 description CDC-3300
 switchport access vlan 2
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/48
 spanning-tree portfast
!
interface GigabitEthernet0/1
 description HDServerSwitch SM-
 switchport trunk encapsulation dot1q
 switchport mode trunk
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 queue-set 2
 mls qos trust cos
 auto qos voip trust
 macro description cisco-switch
 spanning-tree link-type point-to-point
!
interface GigabitEthernet0/2
 description BillingVoipSwitch
 switchport trunk encapsulation dot1q
 switchport mode trunk
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 queue-set 2
 mls qos trust cos
 auto qos voip trust
 macro description cisco-switch
 spanning-tree link-type point-to-point
!
interface GigabitEthernet0/3
 description CDCDelivSwitch MM Fiber
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface GigabitEthernet0/4
 description CDCSwitch MM Fiber
 switchport trunk encapsulation dot1q
 switchport mode trunk
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 queue-set 2
 mls qos trust cos
 auto qos voip trust
 macro description cisco-switch
 spanning-tree link-type point-to-point
!
interface Vlan1
 ip address 172.16.116.2 255.255.240.0
!
interface Vlan2
 ip address 172.16.129.4 255.255.255.0
!
interface Vlan3
 ip address 172.16.130.4 255.255.255.0
!
ip classless
ip route 0.0.0.0 0.0.0.0 172.16.112.1
ip http server
ip http secure-server
!
line con 0
line vty 0 4
 length 0
 transport input ssh
line vty 5 15
 transport input ssh
!
ntp clock-period 36029198
ntp server 172.16.112.6 key 0 prefer
ntp server 169.229.70.95 key 0 prefer
end

接下来是2960交换机(HDServerSwitch)：

Current configuration : 7496 bytes
!
! Last configuration change at 15:32:04 UTC Mon Apr 7 2014 by admin
! NVRAM config last updated at 15:35:13 UTC Tue Mar 3 2015
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
service sequence-numbers
!
hostname HDServerSwitch
!
boot-start-marker
boot-end-marker
!
aaa new-model
!
aaa session-id common
clock timezone UTC -5 0
!
ip domain-name caymanport.com
ip name-server 172.16.112.6
ip name-server 172.16.112.23
ip name-server 172.16.112.9
udld aggressive
!
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 3 3 6 7
mls qos srr-queue output cos-map queue 3 threshold 3 2 4
mls qos srr-queue output cos-map queue 4 threshold 2 1
mls qos srr-queue output cos-map queue 4 threshold 3 0
mls qos
!
crypto pki trustpoint TP-self-signed-1538847872
 enrollment selfsigned
 subject-name cn=IOS-Self-Signed-Certificate-1538847872
 revocation-check none
 rsakeypair TP-self-signed-1538847872
!
spanning-tree mode rapid-pvst
spanning-tree loopguard default
spanning-tree extend system-id
!
errdisable recovery cause link-flap
errdisable recovery interval 60
!
vlan internal allocation policy ascending
!
ip ssh time-out 60
ip ssh authentication-retries 2
!
macro global description cisco-global
!
interface Port-channel1
 description RumPoint LACP Team
 spanning-tree portfast
!
interface FastEthernet0
 no ip address
!
interface GigabitEthernet0/1
 description VsxHD01-4
 switchport mode trunk
 spanning-tree portfast
!
interface GigabitEthernet0/2
 description VsxHD02-6
 switchport mode trunk
 spanning-tree portfast
!
interface GigabitEthernet0/3
 description VsxHD01-5
 switchport mode trunk
 spanning-tree portfast
!
interface GigabitEthernet0/4
 description VsxHD02-0
 switchport mode trunk
 spanning-tree portfast
!
interface GigabitEthernet0/5
 description VsxHD01-3
 switchport mode trunk
 spanning-tree portfast
!
interface GigabitEthernet0/6
 description VsxHD02-5
 switchport mode trunk
 spanning-tree portfast
!
interface GigabitEthernet0/7
 description VsxHD01-2
 switchport mode trunk
 spanning-tree portfast
!
interface GigabitEthernet0/8
 description VsxHD02-4
 switchport mode trunk
 spanning-tree portfast
!
interface GigabitEthernet0/9
 description RumPoint-1
 spanning-tree portfast
 channel-protocol lacp
!
interface GigabitEthernet0/10
 description VsxHD02-3 (VL10)
 switchport access vlan 10
 switchport mode access
 spanning-tree portfast
!
interface GigabitEthernet0/11
 description RumPoint-2
 spanning-tree portfast
!
interface GigabitEthernet0/12
 description VsxHD02-7 (VL10)
 switchport access vlan 10
 switchport mode access
 spanning-tree portfast
!
interface GigabitEthernet0/13
 spanning-tree portfast
!
interface GigabitEthernet0/14
 description VsxHD02-1
 switchport mode trunk
 spanning-tree portfast
!
interface GigabitEthernet0/15
 spanning-tree portfast
!
interface GigabitEthernet0/16
 description VsxHD02-2
 switchport mode trunk
 spanning-tree portfast
!
interface GigabitEthernet0/17
 spanning-tree portfast
!
interface GigabitEthernet0/18
 description VsxHD02ILO
 switchport mode trunk
 spanning-tree portfast
!
interface GigabitEthernet0/19
 spanning-tree portfast
!
interface GigabitEthernet0/20
 spanning-tree portfast
!
interface GigabitEthernet0/21
 spanning-tree portfast
!
interface GigabitEthernet0/22
 spanning-tree portfast
!
interface GigabitEthernet0/23
 spanning-tree portfast
!
interface GigabitEthernet0/24
 description KVMHD
 spanning-tree portfast
!
interface GigabitEthernet0/25
 description CDCVoipSwitch SM-F
 switchport mode trunk
 mls qos trust cos
 macro description cisco-switch
 spanning-tree link-type point-to-point
 spanning-tree guard none
!
interface GigabitEthernet0/26
 description HDSwitch CAT5
 switchport mode trunk
 shutdown
 mls qos trust cos
 macro description cisco-switch
 spanning-tree link-type point-to-point
!
interface Vlan1
 ip address 172.16.112.57 255.255.240.0
!
interface Vlan10
 ip address 172.16.200.57 255.255.255.0
!
ip default-gateway 172.16.112.1
ip http server
ip http secure-server
!
logging esm config
logging history size 500
logging history informational
!
line con 0
line vty 0 4
 transport input ssh
line vty 5 15
 transport input ssh
!
ntp server 172.16.112.6 prefer
ntp server 169.229.70.95 prefer
end

您可以在这里看到网络的拓扑：http://imgur.com/1CvaqUt

网络设备交换机现在连接到CDCSwitch端口30 (虽然它曾经连接到BillingSwitch )。下面是该端口的配置：

interface FastEthernet0/30
 description CDCParts1Switch
 switchport trunk encapsulation dot1q
 switchport mode trunk
 spanning-tree link-type point-to-point
!

CDCVOIPSwitch和HDServerSwitch之间的联系正在下降。

Answer 1

我不是STP专家，但我会好好研究一下的。

基于STP拓扑更改期间发生的情况，对我来说，连接性的短暂丢失听起来像是预期的行为。

当STP拓扑发生变化时(由于切换端口转换到或从阻塞或转发状态，因为一个交换机或上行链路被添加、删除或失败)，一些帧可能会被“黑洞”，因为目标MAC地址通过不再存在的路径可用。这在STP收敛和MAC地址表过期之前发生，在STP拓扑更改的情况下，这种情况将从默认的300秒减少到15秒。由于MAC地址表过期，帧也将通过交换基础结构被淹没。

再一次，你所经历的听起来就像人们所期待的行为。