2台交换机 出现环路报错，头疼啊

[ni-weijian]

以前好好的，然后 2台交换机之间一根专线被电信挖断了，现在就出现这个时不时会断的节奏，好无奈
核心上没有出现的报错信息，但2层上有报错
Jul 12 11:48:18: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port GigabitEthernet1/0/25 on VLAN0050.
Jul 12 14:42:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/25, changed state to down
Jul 12 14:42:24: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/25, changed state to down
Jul 12 14:42:30: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host 192.168.47.195 Port 514 started - reconnection
Jul 12 14:42:35: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host 192.168.8.222 Port 514 started - reconnection
Jul 12 14:43:09: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/25, changed state to up
Jul 12 14:43:11: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/25, changed state to up
Jul 12 14:43:17: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host 192.168.47.195 Port 514 started - reconnection
Jul 12 14:43:22: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host 192.168.8.222 Port 514 started - reconnection
Jul 12 14:43:56: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port GigabitEthernet1/0/25 on VLAN0888.
Jul 12 14:43:57: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port GigabitEthernet1/0/25 on VLAN0050.
Jul 12 14:43:58: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port GigabitEthernet1/0/25 on VLAN0107.
Jul 12 14:44:36: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/25, changed state to down
Jul 12 14:44:37: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/25, changed state to down
Jul 12 14:44:42: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host 192.168.47.195 Port 514 started - reconnection
Jul 12 14:44:47: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host 192.168.8.222 Port 514 started - reconnection
Jul 12 14:44:49: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/25, changed state to up
Jul 12 14:44:51: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/25, changed state to up
Jul 12 14:44:57: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host 192.168.47.195 Port 514 started - reconnection
Jul 12 14:45:02: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host 192.168.8.222 Port 514 started - reconnection
Jul 12 14:45:20: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port GigabitEthernet1/0/25 on VLAN0888.
Jul 12 14:45:21: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port GigabitEthernet1/0/25 on VLAN0050.
Jul 12 14:45:23: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port GigabitEthernet1/0/25 on VLAN0888.
Jul 12 14:45:24: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port GigabitEthernet1/0/25 on VLAN0107.

[Xin Lei · Accepted solution]

ni-weijian 发表于 2016-7-29 16:36
解决了，，光纤问题

哈哈，当我想回复你换光纤的时候，看到你解决了~~~太好了；因为我都试过这问题

[ni-weijian]

:'(:'(:'(:'(:'(

[ni-weijian]

好想直接把guard group关掉，但又怕出事

[ni-weijian]

本帖最后由 ni-weijian 于 2016-7-12 16:03 编辑
对了 2边端口配置如下 2层的
!
interface GigabitEthernet1/0/25
switchport trunk allowed vlan 50,107,111,113,115-118,125,141,142,144,169,244
switchport trunk allowed vlan add 888
switchport mode trunk
speed nonegotiate
udld port
storm-control broadcast level 2.00
storm-control multicast level 2.00
spanning-tree guard loop

[ni-weijian]

三层的
interface GigabitEthernet1/17
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
speed nonegotiate
udld port
storm-control broadcast level 2.00
storm-control multicast level 2.00
end

[zhoujianjoe]

图画的挺过瘾的 既然都断了为啥还能自己起来啊你确定25口是断掉的那个？

[ni-weijian]

zhoujianjoe 发表于 2016-7-12 15:51
图画的挺过瘾的 既然都断了为啥还能自己起来啊你确定25口是断掉的那个？

是的，确定 肯定

[zhoujianjoe]

ni-weijian 发表于 2016-7-12 16:01
是的，确定 肯定

既然断了就近端口你们down掉看看 还报错不

[ni-weijian]

zhoujianjoe 发表于 2016-7-12 16:11
既然断了就近端口你们down掉看看 还报错不

3层上面看不到报错信息，2层有 但下面有环路报错，看不懂啊

[suzhouxiaoniu]

你二层不是配置了 guard loop，光纤一旦单向链路，有可能导致环路，所以阻塞此端口，防环，

[fortune]

根据报错的端口层层往下面查就能查出来了！

[ni-weijian]

suzhouxiaoniu 发表于 2016-7-12 17:48
你二层不是配置了 guard loop，光纤一旦单向链路，有可能导致环路，所以阻塞此端口，防环，

我的光纤是2根的，那如果是这个情况，它过会就自动恢复的。这个是光纤不好？？？？还是电信那光纤问题？？能否证明下光纤问题？？ 谢谢

[ni-weijian]

vsop5207 发表于 2016-7-12 23:56
根据报错的端口层层往下面查就能查出来了！

中间没有了，没有层层概念

[木头人]

我也想知道是怎么回事，求解