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cisco vlan trunk port 消失不見

cisco vlan設定 switch
新二君 2018-05-30 17:53:41 ‧ 3454 瀏覽

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大家好
使用GNS3 模擬三台switch 做VLAN練習,發現一個怪問題
每台switch上面都看不見在vlan 資訊trunk port介面名稱
還有目前s1和s2及s3和s2都無法ping到對方,目前是c7200 router
插l2 NE16SW模組模擬出來的,不知道問題在哪??謝謝大家
IP:
S1 f1/0 10.10.10.253
S3 f1/0 10.10.20.253

S2 f1/0 10.10.10.254
f1/1 10.10.20.254
https://ithelp.ithome.com.tw/upload/images/20180530/20024460RfUEs9Oqup.jpg

https://ithelp.ithome.com.tw/upload/images/20180530/2002446079fykb8v7G.jpg

https://ithelp.ithome.com.tw/upload/images/20180530/20024460kUKNRGrXnL.jpg

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1 個回答

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tea1a
iT邦新手 5 級 ‧ 2018-06-08 12:41:45

如果我沒記錯的話trunk port 不會出現在show vlan上，然後
IP:
S1 f1/0 10.10.10.253
S3 f1/0 10.10.20.253

S2 f1/0 10.10.10.254
f1/1 10.10.20.254

以上interface不是trunk port嗎...?如果是trunk port的話那應該是switchport所以沒辦法設定ip在這些interface上吧??

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新二君 iT邦新手 2 級 ‧ 2018-06-08 13:37:01 檢舉

是的，所以ip是綁在vlan id上面的，目前也無法ping通，我有下ip routeing，trunk port上面沒有綁ip

tea1a iT邦新手 5 級 ‧ 2018-06-20 12:04:01 檢舉

3台都SHOW RUN 看看
S2 SHOW IP ROUTE

新二君 iT邦新手 2 級 ‧ 2018-06-21 14:38:16 檢舉

好的!

新二君 iT邦新手 2 級 ‧ 2018-07-02 18:09:35 檢舉

tea1a 大大,下面是我三台的設定檔,目前switch跟switch都無法互ping 但線路目前都有設定trunk

S1 設定部份

S1#sh running-config
Building configuration...

Current configuration : 1428 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname S1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
ip tcp synwait-time 5
!
!
interface Ethernet0/0
 no ip address
 shutdown
 half-duplex
!
interface FastEthernet1/0
 switchport access vlan 10
 switchport mode trunk
!
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
!
interface FastEthernet1/15
 switchport access vlan 10
!
interface Vlan1
 no ip address
!
interface Vlan10
 ip address 10.10.10.253 255.255.255.0
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 10.10.10.254
!
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
!
!
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

S2 設定部份

S2#sh running-config
Building configuration...

Current configuration : 2090 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname S2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
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
 switchport access vlan 10
 switchport mode trunk
!
interface FastEthernet1/1
 switchport access vlan 20
 switchport mode trunk
!
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
!
interface FastEthernet1/15
!
interface FastEthernet2/0
!
interface FastEthernet2/1
!
interface FastEthernet2/2
!
interface FastEthernet2/3
!
interface FastEthernet2/4
!
interface FastEthernet2/5
!
interface FastEthernet2/6
!
interface FastEthernet2/7
!
interface FastEthernet2/8
!
interface FastEthernet2/9
!
interface FastEthernet2/10
!
interface FastEthernet2/11
!
interface FastEthernet2/12
!
interface FastEthernet2/13
!
interface FastEthernet2/14
!
interface FastEthernet2/15
!
interface Vlan1
 no ip address
!
interface Vlan10
 ip address 10.10.10.254 255.255.255.0
!
interface Vlan20
 ip address 10.10.20.254 255.255.255.0
 vlan-id dot1q 20
  exit-vlan-config
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
no cdp run
!
!
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

S2 show ip route 設定部份

S2#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     10.0.0.0/24 is subnetted, 2 subnets
C       10.10.10.0 is directly connected, Vlan10
C       10.10.20.0 is directly connected, Vlan20
S2#


S3 設定部份

S3#sh running-config
Building configuration...

Current configuration : 1439 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname S3
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
no ip icmp rate-limit unreachable
ip cef
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
ip tcp synwait-time 5
!
!
interface Ethernet0/0
 no ip address
 shutdown
 half-duplex
!
interface FastEthernet1/0
 switchport access vlan 20
 switchport mode trunk
!
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
!
interface FastEthernet1/15
 switchport access vlan 20
!
interface Vlan1
 no ip address
!
interface Vlan20
 ip address 10.10.20.253 255.255.255.0
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 10.10.20.254
!
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
no cdp run
!
!
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
tea1a iT邦新手 5 級 ‧ 2018-07-04 11:33:50 檢舉

初步看了一下，你的TRUNK PORT就不應該再指定它屬於哪個VLAN了
interface FastEthernet1/0
switchport access vlan 10 <----你這句就沒意義了，最好把他NO掉，因為你已經把它設成TRUNK PORT了
switchport mode trunk

新二君 iT邦新手 2 級 ‧ 2018-07-07 23:17:48 檢舉

後來我有把它拿掉,結果還是不通,因該是模擬器問題
我後來重做一個LAB只有兩台交換機互連設定就沒問題

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