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Most of the configuration differences within a switch are caught and reported when you create the channel. This puts the channeling ports in the errdisabled state. An uplink-state group can contain either the member ports of a port channel or the port channel itself, but not both. - If you assign a port channel as an upstream The default recovery interval is 300 seconds.     While this err-disable recovery feature can be a great time saver it is still important to investigate and correct the real issue

For example, to enable error-disable recovery for BPDU guard, enter the following command: Brocade(config)# errdisable recovery cause bpduguard Syntax: errdisable recovery cause [ bpduguard | loam-critical-event | loop-detection | packet-inerror-detect | TIP: Link flap means that the specific port continuously goes up and down. The connection is improper because PortFast is enabled, and the switch connects to another switch. Comment Submit Your Comment By clicking you are agreeing to Experts Exchange's Terms of Use.

Chris (guest) September 26, 2009 at 5:19 p.m. One way to fix the situation is to set the channel mode to desirable on both sides of the connection, and then reenable the ports. L2pt Guard When the Layer 2 PDUs enter the tunnel or access port on the inbound edge switch, the switch overwrites the customer PDU-destination MAC address with a well-known Cisco proprietary Excessive collisions occur when a frame is dropped because the switch encounters 16 collisions in a row.

Syed Jahanzaib Personal Blog to Share Knowledge ! VLAN Security Tips - Best Practices Cisco Catalyst 4500 Series Zero-Downtime IOS Upgrade Pr... To follow along with this video, you can draw your own shapes or download the file… Illustration Software Photos / Graphics Software Web Graphics Software Adobe Creative Suite CS Advertise Here Switch# show errdisable recovery ErrDisable Reason Timer Status ----------------- -------------- arp-inspection Disabled bpduguard Disabled channel-misconfig Disabled dhcp-rate-limit Disabled dtp-flap Disabled gbic-invalid Disabled inline-power Disabled l2ptguard Disabled link-flap Disabled mac-limit Disabled link-monitor-failure

link-flap,这个大多是物理链路造成的 […] Pingback by channel-misconfig (STP) 分析防范 | Jasey Wang -- March 11, 2013 @ 5:49 PM Reply Hello Everyone Assalamu alikum, I have a new problem at hand. Err-disabled Port State, Enable & Disable Autorecovery ... Vincent und die Grenadinen Südafrika Surinam Swasiland Tadschikistan Taiwan Tansania Thailand Togo Trinidad und Tobago Tschad Tschechien Tunesien Türkei Turkmenistan Turks- und Caicosinseln Uganda Ukraine Ungarn Uruguay USA Usbekistan Vanuatu Venezuela Thanks for your help! 0 Write Comment First Name Please enter a first name Last Name Please enter a last name Email We will never share this with anyone.

If you have multiple NICs from a vendor and the NICs all appear to have the same problem, check the manufacturer website for the release notes and be sure that you Late collisions occur after every device on the wire should have recognized that the wire was in use. FTOS(conf-uplink-state-group-1)# description (Optional) Labels the uplink state group with a specific description. Back to Cisco Switches Section Articles To Read Next: Spanning Tree BPDUGuard and Errdisable Interface Automa...

The switch sends keepalives out all the interfaces by default. Default is no downstream links are disabled. You can manually reenable the port (by issuing a shutdown, no shutdown command sequence) or if errdisable recovery is enabled, the operation is retried after a specified time interval. Lucia St.

He is known for his blog and cheat sheets here at Packet Life. You can view the previous notes for objective 1.1.a - SDM Templates - and 1.1.b - Managing MAC Address Table.Error Disable Recovery is the act of a switch detecting an error Thanks udit August 9, 2013 at 12:57 p.m. The port has been error disabled.

If i Reboot my Mikrotik or change port then there is no Ping loss or getting good ping time for only 5 minute then again its starts to loss after every Background Information Platforms That Use Errdisable The errdisable feature is supported on these Catalyst switches: Catalyst switches that run Cisco IOS Software: 2900XL / 3500XL 2940 / 2950 / 2960 / UTC Good question, The reason we decided to let it recover is that we do not have the staffing to log into the switch and babysit everyone that trips the port Vielen Dank.

In certain versions of the UCS manager the portchannel has issues coming up and this is a workaround. just shut the port and no shut it. Prerequisites Requirements There are no specific requirements for this document. This command sequence will enable the port again, however, if the problem persists expect to find the port in Errdisable state again soon.

You can also change this default of 300 seconds if you issue this command: cat6knative(Config)#errdisable recovery interval timer_interval_in_seconds This example changes the errdisable recovery interval from 300 to 400 seconds: cat6knative(Config)#errdisable The network administrator must carefully implement PortFast. Correct the Root Problem After you discover why the ports were disabled, fix the root problem. As shown in the following illustration.

The suggested workaround is to disable keepalives and upgrade to Cisco IOS Software Release 12.2SE or later. Interfaces that will be enabled at the next timeout: Interface Errdisable reason Time left(sec) --------- ----------------- -------------- Fa0/1 psecure-violation 237 And two hundred and thirty-seven seconds later... %PM-4-ERR_RECOVER: Attempting to recover cat6knative#show interfaces gigabitethernet 4/1 status Port Name Status Vlan Duplex Speed Type Gi4/1 err-disabled 100 full 1000 1000BaseSX In order to determine what the problem was, look at the error message. NOTE: Downstream interfaces in an uplink state group are put into a Link-Down state with an UFD-Disabled error message only when all upstream interfaces in the group go down.

Posted in Cisco Switches - Catalyst / Nexus Switch Configuration 4.34482758621 1 1 1 1 1 Rating 4.34 (29 Votes) TweetErrdisable is a feature that automatically disables a port on a This is where autorecovery can be of great assistance. You can specify reasons for an interface to become re-enabled.When a port goes into err-disabled it will shut down and stop sending and receiving traffic. The common cause of link flap is a Layer 1 issue such as a bad cable, duplex mismatch, or bad Gigabit Interface Converter (GBIC) card.

The port is put into the errdisabled state if it flaps more than four-five times in few seconds. show interfaces interface interface_number status—Shows the current status of the switch port. Unidirectional links can cause a variety of problems, which include spanning-tree topology loops. The LED changes to orange and err-disabled will be shown under the show interfaces command.The reason why an interface would go into err-disable is because of an error condition.

cat6knative(config-if)#spanning-tree portfast enable !--- Refer to spanning-tree portfast (interface configuration mode) !--- for more information on the command. Following is an example of what an error-disabled port looks like: 2960G# show interface gigabit0/7GigabitEthernet0/7 is down, line protocol is down (err-disabled) Hardware is Gigabit Ethernet, address is 001b.54aa.c107 (bia 001b.54aa.c107) If traffic with a secure MAC address that is configured or learned on one secure port attempts to access another secure port in the same VLAN In this case, port security The error disabled feature is supported on most Catalyst switches running the Cisco IOS software.

You can also set the time interval. Ensure that only one host is connected to the port. Vineet (guest) September 30, 2009 at 7:30 p.m. Complete Script !

These customers want to know why the error disablement happened and how they can restore the ports to normal. Discover Features & Capabilities - Cisco Catalyst 3850 ... Here is an example of what an error-disabled port looks like from the command-line interface (CLI) of the switch: cat6knative#show interfaces gigabitethernet 4/1 status Port Name Status Vlan Duplex Speed Type Language: EnglishEnglish 日本語 (Japanese) Español (Spanish) Português (Portuguese) Pусский (Russian) 简体中文 (Chinese) Contact Us Help Follow Us Facebook Twitter Google + LinkedIn Newsletter Instagram YouTube Recovering from ErrDisabled port due to

so when we do a shut no shut. If it is required to enable the Errdisable autorecovery feature for all supported reasons, use the following command: 2960G(config)# errdisable recovery cause all To test our configuration we forced a NOTE When automatic recovery re-enables the port, the port is not in the error-disabled state, but it can remain down for other reasons, such as the Tx/Rx of the fibre optic This means that when a violation is detected, the switch will place gigabitethernet 0/48 in the err-disable shutdown state as shown below: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 0031.f6ac.03f5