MTU不一致导致线路周期性丢包

1、MTU协商不一致导致线路周期性丢包一、网络拓扑情况，二、网络大致情况说明：该网络采用思科4507交换机作为该单位网络核心交换机设备，因前期施工和后期成本等问题，导致该网络到互联网和到上级集团公司的专线接入均在一台接入交换机原3560上，该设备和其他接入交换机一样，上行链路均采用trunk方式和思科4507连接，由于对端返程路由等配置（对端接入设备的下一跳思科4507，不是接入交换机3560）问题、此台3560接入交换机工作于透明模式。到分公司的网络通过4507连接的一台3507路由器连接。三、问题说明 因该单位网络改造等原因，特用H3C的汇聚交换机5500替换原接入3650交换机所在网络位置（

2、如红色圆圈表示），配置均采取和原接入交换机思科3560一致，该设备配置量只有上行接口trunk封装、用户vlan、管理地址（）、指向核心设备4507的默认路由等。User Access VerificationPassword: 3550-bg>enPassword: 3550-bg#show runBuilding configuration.Current configuration : 5028 bytes!version 12.2no service padservice timestamps debug uptimeservice timestamps log u

3、ptimeservice password-encryption!hostname 3550-bg!enable secret 5 $1$TEZy$Z3dYM7Yz6p4tR4pfzj9O6.enable password 7 094F471A1A0A!username ciscono aaa new-modelsystem mtu routing 1500ip subnet-zeroip routing!no file verify autospanning-tree mode pvstspanning-tree extend system-id!vlan internal allocati

4、on policy ascending!interface FastEthernet0/1 description internet switchport access vlan 2 switchport mode access!interface FastEthernet0/2 description guangyuwang switchport access vlan 2 switchport mode access!interface FastEthernet0/3 switchport access vlan 2 switchport mode access!interface Fas

5、tEthernet0/4 switchport access vlan 2 switchport mode access!interface FastEthernet0/5 switchport access vlan 3 switchport mode access!interface FastEthernet0/6 description shipinhuiyi switchport access vlan 3 switchport mode access!interface FastEthernet0/7 description BG-shebeibu switchport access

6、 vlan 2 switchport mode access!interface FastEthernet0/8 description BG-chedui switchport access vlan 2 switchport mode access!interface FastEthernet0/9 switchport access vlan 2 switchport mode access!interface FastEthernet0/10 switchport access vlan 2 switchport mode access!interface FastEthernet0/

7、11 switchport access vlan 2 switchport mode access!interface FastEthernet0/12 switchport access vlan 2 switchport mode access!interface FastEthernet0/13 switchport access vlan 2 switchport mode access!interface FastEthernet0/14 switchport access vlan 2 switchport mode access!interface FastEthernet0/

8、15 switchport access vlan 2 switchport mode access!interface FastEthernet0/16 switchport access vlan 2 switchport mode access!interface FastEthernet0/17 switchport access vlan 2 switchport mode access!interface FastEthernet0/18 switchport access vlan 2 switchport mode access!interface FastEthernet0/

9、19 switchport access vlan 2 switchport mode access!interface FastEthernet0/20 switchport access vlan 2 switchport mode access!interface FastEthernet0/21 switchport access vlan 2 switchport mode access! interface FastEthernet0/22 switchport access vlan 2 switchport mode access!interface FastEthernet0

10、/23 switchport access vlan 2 switchport mode access!interface FastEthernet0/24 switchport access vlan 2 switchport mode access!interface FastEthernet0/25 switchport access vlan 2 switchport mode access!interface FastEthernet0/26 switchport access vlan 2 switchport mode access!interface FastEthernet0

11、/27 switchport access vlan 2 switchport mode access!interface FastEthernet0/28 switchport access vlan 2 switchport mode access!interface FastEthernet0/29 switchport access vlan 2 switchport mode access!interface FastEthernet0/30 switchport access vlan 2 switchport mode access!interface FastEthernet0

12、/31 switchport access vlan 2 switchport mode access!interface FastEthernet0/32 switchport access vlan 2 switchport mode access!interface FastEthernet0/33 switchport access vlan 2 switchport mode access!interface FastEthernet0/34 switchport access vlan 2 switchport mode access!interface FastEthernet0

13、/35 switchport access vlan 2 switchport mode access!interface FastEthernet0/36 switchport access vlan 2 switchport mode access!interface FastEthernet0/37 switchport access vlan 2 switchport mode access speed 100 duplex full!interface FastEthernet0/38 switchport access vlan 2 switchport mode access!i

14、nterface FastEthernet0/39 switchport access vlan 2 switchport mode access speed 100 duplex full!interface FastEthernet0/40 switchport access vlan 2 switchport mode access!interface FastEthernet0/41 switchport access vlan 2 switchport mode access speed 100 duplex full!interface FastEthernet0/42 switc

15、hport access vlan 2 switchport mode access!interface FastEthernet0/43 switchport access vlan 2 switchport mode access!interface FastEthernet0/44 switchport access vlan 2 switchport mode access!interface FastEthernet0/45 switchport access vlan 2 switchport mode access!interface FastEthernet0/46 switc

16、hport access vlan 2 switchport mode access!interface FastEthernet0/47 switchport access vlan 2 switchport mode access!interface FastEthernet0/48 description HS-BG switchport trunk encapsulation dot1q switchport trunk allowed vlan 2,3 switchport mode trunk!interface GigabitEthernet0/1 description HS-

17、BG switchport trunk encapsulation isl switchport mode trunk!interface GigabitEthernet0/2 switchport mode dynamic desirable!interface GigabitEthernet0/3 switchport mode dynamic desirable!interface GigabitEthernet0/4 switchport mode dynamic desirable!interface Vlan1 description guanli ip address 1.1.1

18、.2 !ip classlessip http server!control-plane!line con 0line vty 0 4 password 7 094F471A1A0A loginline vty 5 15 login!monitor session 1 source interface Fa0/1end3550-bg#核心交换机思科4507配置：该设备配置量为用户网关、vlan配置、到集团公司、互联网、分公司的静态路由配置。Password: 4507-mis>enPassword: 4507-mis#show runBuilding confi

19、guration.Current configuration : 16281 bytes!version 12.2no service padservice timestamps debug uptimeservice timestamps log uptimeservice password-encryptionservice compress-configno service dhcp!hostname 4507-mis!enable password 7 110A1016141D!username ciscoip subnet-zero!spanning-tree mode pvstsp

20、anning-tree extend system-idpower redundancy-mode redundant!redundancy mode rpr!interface GigabitEthernet1/1!interface GigabitEthernet1/2!interface GigabitEthernet2/1!interface GigabitEthernet2/2!interface GigabitEthernet3/1 description HS-JK switchport trunk encapsulation isl switchport mode trunk!

21、 interface GigabitEthernet3/2 description HS-TX switchport trunk encapsulation isl switchport mode trunk!interface GigabitEthernet3/3 description HS-BG switchport trunk allowed vlan 2 switchport trunk allowed vlan add 3 switchport trunk encapsulation dot1q switchport mode trunk!interface GigabitEthe

22、rnet3/4 description HS-SM-1 switchport trunk encapsulation isl switchport mode trunk!interface GigabitEthernet3/5 description HS-SM-2 switchport access vlan 3 switchport trunk encapsulation isl switchport mode access!interface GigabitEthernet3/6 switchport access vlan 4 switchport mode access!interf

23、ace GigabitEthernet4/1 switchport access vlan 4 switchport mode access ip access-group 1 in!interface GigabitEthernet4/2 switchport access vlan 4 switchport mode access!interface GigabitEthernet4/3 switchport access vlan 4 switchport mode access!interface GigabitEthernet4/4 switchport access vlan 4

24、switchport mode access!interface GigabitEthernet4/5 switchport access vlan 4 switchport mode access!interface GigabitEthernet4/6 switchport access vlan 4 switchport mode access!interface GigabitEthernet5/1!interface GigabitEthernet5/2!interface GigabitEthernet5/3!interface GigabitEthernet5/4!interfa

25、ce GigabitEthernet5/5!interface GigabitEthernet5/6 switchport access vlan 4 switchport mode access!interface FastEthernet6/1 description SM switchport access vlan 3 switchport mode access!interface FastEthernet6/2 description sis switchport access vlan 3!interface FastEthernet6/3 switchport access v

26、lan 3!interface FastEthernet6/4 description HS-BG switchport trunk encapsulation isl switchport mode trunk!interface FastEthernet6/5 switchport access vlan 4!interface FastEthernet6/6 switchport access vlan 4!interface FastEthernet6/7 description 346-2 switchport access vlan 4!interface FastEthernet

27、6/8 switchport access vlan 4!interface FastEthernet6/9 switchport access vlan 4!interface FastEthernet6/10 switchport access vlan 4 speed 100 duplex full!interface FastEthernet6/11 description oa-server switchport access vlan 2!interface FastEthernet6/12 switchport access vlan 4!interface FastEthern

28、et6/13 switchport access vlan 4!interface FastEthernet6/14 switchport access vlan 4!interface FastEthernet6/15 switchport access vlan 4!interface FastEthernet6/16 switchport access vlan 4!interface FastEthernet6/17 switchport access vlan 4!interface FastEthernet6/18 switchport access vlan 4!interfac

29、e FastEthernet6/19 switchport access vlan 4!interface FastEthernet6/20 switchport access vlan 4!interface FastEthernet6/21 switchport access vlan 4!interface FastEthernet6/22 switchport access vlan 4!interface FastEthernet6/23 switchport access vlan 4!interface FastEthernet6/24 switchport access vla

30、n 4!interface FastEthernet6/25 switchport access vlan 4!interface FastEthernet6/26 switchport access vlan 4!interface FastEthernet6/27 switchport access vlan 4!interface FastEthernet6/28 switchport access vlan 2!interface FastEthernet6/29 switchport access vlan 4!interface FastEthernet6/30 descripti

31、on beiyong-3 switchport access vlan 3!interface FastEthernet6/31 switchport access vlan 3!interface FastEthernet6/32 switchport access vlan 3!interface FastEthernet6/33 switchport access vlan 3!interface FastEthernet6/34 switchport access vlan 4!interface FastEthernet6/35 switchport access vlan 3!in

32、terface FastEthernet6/36 switchport access vlan 3!interface FastEthernet6/37 switchport access vlan 3!interface FastEthernet6/38 switchport access vlan 3!interface FastEthernet6/39 switchport access vlan 3!interface FastEthernet6/40 switchport access vlan 3!interface FastEthernet6/41 switchport acce

33、ss vlan 3!interface FastEthernet6/42 switchport access vlan 3!interface FastEthernet6/43 switchport access vlan 3!interface FastEthernet6/44 switchport access vlan 3!interface FastEthernet6/45 description tuoliu switchport access vlan 3!interface FastEthernet6/46 description tuoliu switchport access

34、 vlan 3!interface FastEthernet6/47 description tuoliu switchport access vlan 3!interface FastEthernet6/48 description X346-1 switchport access vlan 4!interface FastEthernet7/1 switchport access vlan 3!interface FastEthernet7/2 switchport access vlan 3!interface FastEthernet7/3 switchport access vlan

35、 3!interface FastEthernet7/4 switchport access vlan 3! interface FastEthernet7/5 switchport access vlan 3!interface FastEthernet7/6 switchport access vlan 3!interface FastEthernet7/7 switchport access vlan 3!interface FastEthernet7/8 switchport access vlan 3!interface FastEthernet7/9 switchport acce

36、ss vlan 3!interface FastEthernet7/10 switchport access vlan 3!interface FastEthernet7/11 switchport access vlan 3!interface FastEthernet7/12 switchport access vlan 3!interface FastEthernet7/13 switchport access vlan 3!interface FastEthernet7/14 switchport access vlan 3!interface FastEthernet7/15 swi

37、tchport access vlan 3!interface FastEthernet7/16 switchport access vlan 3!interface FastEthernet7/17 switchport access vlan 3! interface FastEthernet7/18 switchport access vlan 3!interface FastEthernet7/19 switchport access vlan 3!interface FastEthernet7/20 switchport access vlan 3!interface FastEth

38、ernet7/21 switchport access vlan 3!interface FastEthernet7/22 switchport access vlan 3!interface FastEthernet7/23 switchport access vlan 3!interface FastEthernet7/24 switchport access vlan 3!interface FastEthernet7/25 switchport access vlan 3!interface FastEthernet7/26 switchport access vlan 3!inter

39、face FastEthernet7/27 switchport access vlan 3!interface FastEthernet7/28 switchport access vlan 3!interface FastEthernet7/29 switchport access vlan 3!interface FastEthernet7/30 switchport access vlan 3! interface FastEthernet7/31 switchport access vlan 3!interface FastEthernet7/32 switchport access

40、 vlan 3!interface FastEthernet7/33 switchport access vlan 3!interface FastEthernet7/34 switchport access vlan 3!interface FastEthernet7/35 switchport access vlan 3!interface FastEthernet7/36 switchport access vlan 3!interface FastEthernet7/37 switchport access vlan 3!interface FastEthernet7/38 switc

41、hport access vlan 3!interface FastEthernet7/39 switchport access vlan 3!interface FastEthernet7/40 switchport access vlan 3!interface FastEthernet7/41 switchport access vlan 3!interface FastEthernet7/42 switchport access vlan 3!interface FastEthernet7/43 switchport access vlan 3! interface FastEther

42、net7/44 switchport access vlan 3!interface FastEthernet7/45 switchport access vlan 3!interface FastEthernet7/46 switchport access vlan 3!interface FastEthernet7/47 switchport access vlan 3!interface FastEthernet7/48 switchport access vlan 3!interface Vlan1 description guanli ip address 255.2

43、55.255.0!interface Vlan2 description bangong ip address 54 !interface Vlan3 description shengchan ip address !interface Vlan4 description fuwuqi ip address 54 24!interface Vlan10 description shipinjiankong ip address 54

44、!ip route ip route ip route 53ip route 53ip route 53ip route ip route 255.255.2

45、55.0 ip route ip route ip route ip route ip http server!snmp-server community dldc RWsnmp-server enable traps snmp authentication linkdown linkup coldstart warmstartsnmp-server enable traps ttysnmp-server enable traps vtpsnmp-server enable traps vlancreatesnmp-server enable traps vlandeletesnmp-server enable traps stpxsnmp-server enable traps port-securitysnmp-server enable traps configsnmp-server enable traps entitysnmp-s