loopback端口环回检测问题

shensuan11

                               
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网络拓扑图如上。s5130开启环回检测，下面的tplink傻瓜交换机人为制造环路，如红线部分。现在的情况是tplink下面的电脑无法上网，但是5130，不管是全局还是11端口都没有任何提示信息。

全局配置

loopback-detection global enable vlan 1 to 4094

接口配置

interface GigabitEthernet1/0/11

port access vlan 80

broadcast-suppression 10

loopback-detection enable vlan 1 to 4094

全局提示信息

<H3C>display loopback-detection
Loopback detection is enabled.
Loopback detection interval is 30 second(s).
No loopback is detected.
<H3C>

11口信息

<H3C>display interface GigabitEthernet 1/0/11
GigabitEthernet1/0/11
Current state: UP
Line protocol state: UP
IP packet frame type: Ethernet II, hardware address: 38ad-befe-14a9
Description: GigabitEthernet1/0/11 Interface
Bandwidth: 1000000 kbps
Loopback is not set
Media type is twisted pair
Port hardware type is 1000_BASE_T
1000Mbps-speed mode, full-duplex mode
Link speed type is autonegotiation, link duplex type is autonegotiation
Flow-control is not enabled
Maximum frame length: 12288
Allow jumbo frames to pass
Broadcast max-ratio: 10%
Multicast max-ratio: 100%
Unicast max-ratio: 100%
PVID: 80
MDI type: Automdix
Port link-type: Access
Tagged VLANs:   None
Untagged VLANs: 80
Port priority: 0
Last link flapping: 1 hours 37 minutes 38 seconds
Last clearing of counters: Never
Peak input rate: 18031 bytes/sec, at 2013-01-01 01:03:29
Peak output rate: 501883 bytes/sec, at 2013-01-01 00:25:52
Last 300 second input: 22 packets/sec 4091 bytes/sec 0%
Last 300 second output: 45 packets/sec 9410 bytes/sec 0%
Input (total):  167770 packets, 46057229 bytes
         158331 unicasts, 7532 broadcasts, 1907 multicasts, 0 pauses
Input (normal):  167770 packets, - bytes
         158331 unicasts, 7532 broadcasts, 1907 multicasts, 0 pauses
Input:  0 input errors, 0 runts, 0 giants, 0 throttles
         0 CRC, 0 frame, - overruns, 0 aborts
         - ignored, - parity errors
Output (total): 2419882 packets, 248903091 bytes
         159205 unicasts, 2114980 broadcasts, 145697 multicasts, 0 pauses
Output (normal): 2419882 packets, - bytes
         159205 unicasts, 2114980 broadcasts, 145697 multicasts, 0 pauses
Output: 0 output errors, - underruns, - buffer failures
         0 aborts, 0 deferred, 0 collisions, 0 late collisions
         0 lost carrier, - no carrier
               
<H3C>

旋律1

11口有环吗？