如何解决cisco的端口显示err-disable1
cisco依靠自身的技术和对网络经济模式的深刻理解,成为了网络应用的成功实践者之一,那么你知道如何解决cisco的端口显示err-disable1吗?下面是读文网小编整理的一些关于如何解决cisco的端口显示err-disable1的相关资料,供你参考。
解决cisco的端口显示err-disable1的方法:
导致这样的情况可能是因为线路不通,物理指示灯灭或者显示为橙色(不同平台指示灯状态不同)
show interface 输出显示接口状态:
FastEthernet0/47 is down, line protocol is down (err-disabled)
接口状态是err-disable.
sw1showinterfaces status
Port Name Status Vlan Duplex Speed Type
Fa0/47 err-disabled 1 auto auto 10/100BaseTX
如果出现了接口状态为err-disable,show interfaces status err-disabled命令能查看触发err-disable的原因。
下面示例原因为bpduguard,在连接了交换机的端口配置了SPAnning-tree bpduguard enable.
sw1showinterfaces status err-disabled
Port Name Status Reason
Fa0/47 err-disabled bpduguard
接口产生err-disable的原因可以由以下的命令来查看,系统缺省的配置是所有列出的原因都能导致接口被置为err-disable.
sw1showerrdisable detect
ErrDisable Reason Detection status
----------------- ----------------
udld Enabled
bpduguard Enabled
security-violatio Enabled
channel-misconfig Enabled
psecure-violation Enabled
dhcp-rate-limit Enabled
unicast-flood Enabled
vmps Enabled
pagp-flap Enabled
dtp-flap Enabled
link-flap Enabled
l2ptguard Enabled
gbic-invalid Enabled
loopback Enabled
dhcp-rate-limit Enabled
unicast-flood Enabled
从列表中,我们可以看出常见的原因有udld,bpduguard,link-flap以及loopback等。
具体由什么原因导致当前接口err-disable可以由show interface status err-disable来查看。
在接口模式下采用shutdown,no shutdown进行手动的激活。
在缺省配置下,一旦接口被置为err-disable,IOS将不会试图恢复接口。
这个可以由show errdisable recovery来查看,timer status下面所有的值都是disable.
下面的示例中,由于手工配置了bpduguard恢复,所以timer status的值变为Enable.
sw1showerrdisable recovery
ErrDisable Reason Timer Status
----------------- --------------
udld Disabled
bpduguard Enabled
security-violatio Disabled
channel-misconfig Disabled
vmps Disabled
pagp-flap Disabled
dtp-flap Disabled
link-flap Disabled
l2ptguard Disabled
psecure-violation Disabled
gbic-invalid Disabled
dhcp-rate-limit Disabled
unicast-flood Disabled
loopback Disabled
Timer interval: 300 seconds
Interfaces that will be enabled at the next timeout:
Interface Errdisable reason Time left(sec)
--------- ----------------- --------------
Fa0/47 bpduguard 217
配置IOS重新激活errdisable的接口,使用以下命令:
sw1(configerrdisablerecovery cause bpduguard
sw1(configerrdisablerecovery cause ?
all Enable timer to recover from all causes
bpduguard Enable timer to recover from BPDU Guard error disable state
channel-misconfig Enable timer to recover from channel misconfig disable state
dhcp-rate-limit Enable timer to recover from dhcp-rate-limit error disable state
dtp-flap Enable timer to recover from dtp-flap error disable state
gbic-invalid Enable timer to recover from invalid GBIC error disable state
l2ptguard Enable timer to recover from l2protocol-tunnel error disable state
link-flap Enable timer to recover from link-flap error disable state
loopback Enable timer to recover from loopback detected disable state
pagp-flap Enable timer to recover from pagp-flap error disable state
psecure-violation Enable timer to recover from psecure violation disable state
security-violation Enable timer to recover from 802.1x violation disable state
udld Enable timer to recover from udld error disable state
unicast-flood Enable timer to recover from unicast flood disable state
vmps Enable timer to recover from vmps shutdown error disable
配置完上述命令后,IOS在一段时间后试图恢复被置为err-disable的接口,这段时间缺省为300秒。
但是,如果引起err-disable的源没有根治,在恢复工作后,接口会再次被置为err-disable.
调整err-disable的超时时间,可以使用以下命令:
sw1(configerrdisablerecovery interval ?
<30-86400> timer-interval(sec)
可以调整在30-86400秒,缺省是300秒。
如果产生err-disable的原因是udld,下面有一条命令非常管用:
swudldreset
No ports are disabled by UDLD.
解决端口出现err-disabled问题
关于接口处于err-disable的故障排查
故障症状:
线路不通,物理指示灯灭或者显示为橙色(不同平台指示灯状态不同)
show interface 输出显示接口状态:
FastEthernet0/47 is down, line protocol is down (err-disabled)
接口状态是err-disable.
sw1showinterfaces status
Port Name Status Vlan Duplex Speed Type
Fa0/47 err-disabled 1 auto auto 10/100BaseTX
如果出现了接口状态为err-disable,show interfaces status err-disabled命令能查看触发err-disable的原因。
下面示例原因为bpduguard,在连接了交换机的端口配置了spanning-tree bpduguard enable.
sw1showinterfaces status err-disabled
Port Name Status Reason
Fa0/47 err-disabled bpduguard
接口产生err-disable的原因可以由以下的命令来查看,系统缺省的配置是所有列出的原因都能导致接口被置为err-disable.
sw1showerrdisable detect
ErrDisable Reason Detection status
----------------- ----------------
udld Enabled
bpduguard Enabled
security-violatio Enabled
channel-misconfig Enabled
psecure-violation Enabled
dhcp-rate-limit Enabled
unicast-flood Enabled
vmps Enabled
pagp-flap Enabled
dtp-flap Enabled
link-flap Enabled
l2ptguard Enabled
gbic-invalid Enabled
loopback Enabled
dhcp-rate-limit Enabled
unicast-flood Enabled
从列表中,我们可以看出常见的原因有udld,bpduguard,link-flap以及loopback等。
具体由什么原因导致当前接口err-disable可以由show interface status err-disable来查看。
在接口模式下采用shutdown,no shutdown进行手动的激活。
在缺省配置下,一旦接口被置为err-disable,IOS将不会试图恢复接口。
这个可以由show errdisable recovery来查看,timer status下面所有的值都是disable.
下面的示例中,由于手工配置了bpduguard恢复,所以timer status的值变为Enable.
sw1showerrdisable recovery
ErrDisable Reason Timer Status
----------------- --------------
udld Disabled
bpduguard Enabled
security-violatio Disabled
channel-misconfig Disabled
vmps Disabled
pagp-flap Disabled
dtp-flap Disabled
link-flap Disabled
l2ptguard Disabled
psecure-violation Disabled
gbic-invalid Disabled
dhcp-rate-limit Disabled
unicast-flood Disabled
loopback Disabled
Timer interval: 300 seconds
Interfaces that will be enabled at the next timeout:
Interface Errdisable reason Time left(sec)
--------- ----------------- --------------
Fa0/47 bpduguard 217
配置IOS重新激活errdisable的接口,使用以下命令:
sw1(configerrdisablerecovery cause bpduguard
sw1(configerrdisablerecovery cause ?
all Enable timer to recover from all causes
bpduguard Enable timer to recover from BPDU Guard error disable state
channel-misconfig Enable timer to recover from channel misconfig disable state
dhcp-rate-limit Enable timer to recover from dhcp-rate-limit error disable state
dtp-flap Enable timer to recover from dtp-flap error disable state
gbic-invalid Enable timer to recover from invalid GBIC error disable state
l2ptguard Enable timer to recover from l2protocol-tunnel error disable state
link-flap Enable timer to recover from link-flap error disable state
loopback Enable timer to recover from loopback detected disable state
pagp-flap Enable timer to recover from pagp-flap error disable state
psecure-violation Enable timer to recover from psecure violation disable state
security-violation Enable timer to recover from 802.1x violation disable state
udld Enable timer to recover from udld error disable state
unicast-flood Enable timer to recover from unicast flood disable state
vmps Enable timer to recover from vmps shutdown error disable
配置完上述命令后,IOS在一段时间后试图恢复被置为err-disable的接口,这段时间缺省为300秒。
但是,如果引起err-disable的源没有根治,在恢复工作后,接口会再次被置为err-disable.
调整err-disable的超时时间,可以使用以下命令:
sw1(configerrdisablerecovery interval ?
<30-86400> timer-interval(sec)
可以调整在30-86400秒,缺省是300秒。
如果产生err-disable的原因是udld,下面有一条命令非常管用:
swudldreset
No ports are disabled by UDLD.
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