Cisco Switching/Routing :: 1242 - MAC-flap Notifications
Feb 8, 2010
I am having an issue at one of our remote agencies whereas we are getting numerous mac-flap notifications on our switches. This has become kind of a hinderance as we are getting tired of seeing these messages. The end users havent been complaining.
It's usually occurring with the same mac-addresses over and over. Upon further investigation, we found the mac-addresses are all on laptops which have both wireless and wired nic's. There are wireless AP's (cisco 1242's) in use which they can connect. We also found where the error is popping up as they move from wireless into docking into their docking station which has a lan cable attached. I was under the assumption that the wireless mac and wired mac were different numbers and therefore if the wired was up simultaneously with the wired, as it switched over, they shouldn't get a flap.
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Feb 27, 2013
I currently have a stack of 3750G switches with a cross stack etherchannel connected to a 3750E stack in the distribution layer.The 3750G stack is running 15.0-2SE IP Base. I began noticing the Mac flap issue when I was Re-enabling dot1x on the switchports. As first I thought dot1x maybe have contributed to this so I removed it from the stack temporarily.I am still seeing Mac flap logs usually when a machine reboots or re-connects back to the network. These are all wired desktops.I started looking at the etherchannel configuration which is using LACP. The 3750E stack looks fine with all ports in mode active. On the problematic 3750G stack I noticed 3 of the ports in the etherchannel set to mode active and 1 port set to mode passive. The port shows as bundled but I can't imagine this is ok.The only other difference on this one port is there is no mls qos commands like on the other 3 interfaces in the port channel.I mainly need to know what the Mac flapping is about. Whether it is a bug or related to the current etherchannel configuration.
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Apr 10, 2013
We are using CISCO LMS 4.2.3 in our network in India, we are facing a issue regarding alarm generation for a protocol flap/down, especially when BGP / OSPF neighbourship got flapped.These flapping will result in the data service degradation , by which we came to know that some protocol flap may occurred at router end & then we go for the manual check by login into the router.after escalating the same to cisco we came to know that it is a bug of Cisco LMS. using any other method/technique to view the protocol down alarms automatically for cisco routers.
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Nov 8, 2011
We have a couple of IBM blade chassis with Nexus 4000I 10G blade switch in it. Four 10G ports from each Nexus 4000I switch are bundled into a port channel and connected to Nexus 7K. On the 4k end, one port in the port channel is doing down and coming up as an idividual port. After few minutes it is going down again and coming up as a port-channel member port. It is happening quite offen. [code]
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Feb 20, 2012
Here is an example of what each switch logs when a server drops offline. Sample logs taken between 5:32am and 5:35am on Feb 20. This particular one was having problems all weekend. Switch #1 encountered over 2000 interface resets. The corresponding VPC port on Switch #2 only had 13 resets.
NEXUS SWITCH #1
2012 Feb 20 05:32:09 q91-sw01-5010 %ETH_PORT_CHANNEL-5-FOP_CHANGED: port-channel10: first operational port changed
from Ethernet1/10 to none
2012 Feb 20 05:32:09 q91-sw01-5010 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel10: Ethernet1/10 is down
2012 Feb 20 05:32:09 q91-sw01-5010 %ETH_PORT_CHANNEL-5-PORT_DOWN: port-channel10: port-channel10 is down
2012 Feb 20 05:32:09 q91-sw01-5010 %ETHPORT-5-IF_DOWN_PORT_CHANNEL_MEMBERS_DOWN: Interface port-channel10 is down (
No operational members)
[code].....
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Apr 10, 2013
We are using CISCO LMS 4.2.3 in our network in India, we are facing a issue regarding alarm generation for a protocol flap/down, especially when BGP / OSPF neighbourship got flapped.These flapping will result in the data service degradation , by which we came to know that some protocol flap may occurred at router end & then we go for the manual check by login into the router.After escalating the same to cisco we came to know that it is a bug of Cisco LMS. using any other method/technique to view the protocol down alarms automatically for cisco routers.
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May 23, 2013
i never see this before, but on newly purchased just configured firewall.when i do wrtie standby.All interfaces on standby unit flaps.is it some IOS bug? my firewalls are [code] what could be the reason? FYI i am using LAN base failover and not doing any statful fail-over.
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Apr 27, 2011
Am running LMS 4.0 on windows 2003 server, i would like to disable or remove notifications with the EventName 'ExceededMaximumUptime' and 'BackupActivated' on the device fault summary view. How do i achieve this? This will be useful in only monitoring fewer notifications.
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May 29, 2013
After reboot WLC , the switch port was err-disable , the cause is link flap after we reboot 3 times , the switch port link flap err-disable every time? We don't know why the WLC rebboot will cause it , it just normal action on device the WLC version is 7.4.100.0 link switch with access port , no port channel , no portfast.
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May 12, 2013
We're running LMS 3.2 with DFM 3.2, and at some point within the last month, email notifications from DFM have stopped flowing. DFM is trapping events as they occur and these are viewable through the portal, but notifications that should be going out as email and SMS messages have stopped.
[code]...
Backups going back beyond when this is believed to have stopped working are available if something needs to be restored. If that's the direction I need to go, how do I restore just the DFM portion of the database? If backup restore is not the way to proceed, what other advice can be provided.
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Mar 16, 2013
It has email and alarm notifications. But what about sound notification through PC speaker?
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Dec 20, 2010
I have been trying to setup my DIR-655 A4 (Firmware 1.34NA) router to send me email notifications on new firmwares, when the log is full and every Saturday. So I have a schedule already created for sending the emails on Saturday and I also have the option to send notification of new firmware checked. Now I have settings, similar to the following, under email settings.
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Feb 28, 2010
setting up the email notifications. I need the log emailed to me during a certain time of the day and it wont email anything. Even when I am in the log and push the email now, it does nothing. I've tried setting it up through hotmail, lmsn live, and gmail. None of them work. What am I doing wrong or what do I need to do?
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Jun 20, 2011
We have a 2800 router which is configured as a Voice Gateway. For some reason, yesterday we started getting DFM notifications like the one below. We seems to get an active messages every few 10mins or so, then a few minutes later the message will clear before becoming active again...
EVENT ID = 0009NK2
ALERT ID = 0000QTM
TIME = Tue 21-Jun-2011 16:06:50 BST
STATUS = Active
SEVERITY = Critical
MANAGED OBJECT = XXXXVG1
MANAGED OBJECT TYPE = Routers.
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Jul 22, 2012
Can I configure the 2504 to send email notifications for particular alerts? how?
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Feb 22, 2010
DIR-655(A3) 1.33NAb02_HNAP_beta I used to be able to send notifications on log full etc... When my ISP was still allowing outbound email w/opt out of block on port 25. This worked on my old DI-524, and used to work on my DIR-655.In an effort to clamp down on spam my ISP formerly SBC now AT&T began requiring SSL. Secure Authentication is not required. With the ever increasing concern for controlling spam DLink really needs to get in gear and provide the support customers need and back the efforts of ISP's to control spam. Otherwise it's wasted code occupying space. On that note if space is a concern, need space for the code ~ throw SecureSpot out !
[URL]
On the Outgoing Server (SMTP) Settings window click Edit and verify:
# Server Name - displays smtp.att.yahoo.com.
# Port - displays 465.
Note: When updating the secure server settings, check SSL checkbox first to update the port setting.
* Under Outgoing mail (SMTP), the box next to server requires a secure connection (SSL) is checked. This works flawlessly with Thunderbird and other mail clients therefore it is clearly a shortcoming of the firmware on the DIR-655 i.e. no SSL? This is totally inadequate.
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Sep 15, 2011
Where/how do we setup an SRP527W to send email notifications? Can't seem to locate the setting when logged in as admin.
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Nov 1, 2011
I have a 4507R that will be using track and sla for failover/failback on two WAN circuits going out of my switch. Is there a way to configure an email notification, or some other sort of notification to let me know which route is being used, especially when the failover kicks over to by backup route.
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Jul 19, 2011
I have 2 Cisco 5508 Wireless LAN Controllers.They are NOT connected to a WCS.Is there a way to configure the 5508's to send email notifications when an AP drops off line?Is not is this functionality available with either a WCS or new NCS?
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Jun 28, 2012
Is there a way to get notifications (emails) when the external ip changes and the rotuer updates dyndns?i need to get an email about this change of ip. The only constraint is it has to work without a computer attached to the router as it would have to be powered on 24/7 So ip change notifiers like trueip or ipcheck won't work as they are programs that run in a computer.
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Aug 8, 2012
We're currently evaluating Cisco Prime LMS 4.2.Something we've been trying to achieve for the past couple of days is to have LMS notify us when a Microsoft Host is Unreachable, and then to notify us once that alarm has cleared (the Microsoft Host is Reachable again).
We're at the point where the Microsoft Host was discovered, LMS incorrectly identified it as a Cisco Call Manager, so we changed it's identity to non-cisco device > microsoft host > microsoft host. LMS currently has the device listed as being in the 'Questioned' state. SNMP timeout has been set to 15 seconds, and the SNMP community is correct.
Being new to LMS Prime, and having not received any training on the product to this point, we turned to the admin guide, but we couldn't find anything that goes into detail for how to manage the notification for non-Cisco devices.
Is what we're trying to achieve possible with Cisco Prime LMS 4.2? We just want to be able to receive simple 'host unreachable' notifications for Microsoft servers, and the corresponding 'cleared' notifications once the server is back online.
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Aug 29, 2011
It was installed an AP 1522 as RAP, in a mesh network composed for AP's 1242.At the time that AP is connected on the network, all other APs 1242 fell.
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Dec 26, 2011
I'm using two cisco 1242 AG access points to configure WDS feature. I've named the accesspoints as AP1(acts as WDS) and AP2. Since I've only two accesspoints, I've configured the AP1 to act both as a WDS and as a regular accesspoints.Further I'm using the local radius server within the AP1 to authenticate both clients and infrastructure accesspoints. And both APs are connected to a router (which act as a dhcp server) via a unmanageble switch and both accesspoints are getting registered with WDS.But the issue is when I tried to connect to the configured SSID, it promts me a "authentication window" but after entering the configured username and password, i'm not getting authenticated by the AP.
I've attached the configurations of both APs to for your reference and I've used the following cisco document as a guideline to crate the WDS. [code]
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Apr 10, 2012
Setting up SNMP on my Cisco AP's (1242AG Lightweight). How do I manage these via SNMP? It doesn't appear there is any settings within each AP for SNMP but only on the 4400 controller. What I am trying to do is setup Solarwinds Alerts, so when an AP goes down, I get notified of it. How or where this gets setup on the 4400 or the AP. I'm guessing there is something probably on the 4400 that I setup.
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Mar 4, 2013
I'm having a little issue with some Cisco Aironet1242ag WAP's. I receive a call at least twice a month stating that some of the WAP's are not giving out internet connection. What I always do is go to my patch panel and disconnect those WAP's not working and connect them back again so they can power cycle. These WAP's are connected to a Cisco3750g. Once the WAP's boot up, the users can connect to the WAP and connect to the internet.
I don't know if these WAP's are filling up with some information that causes the access points to not connect to the WAN.
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Jan 17, 2011
I have some 1242s and I can't get a straight answer on whether they can do both autonomous and lightweight or just lightweight.
Model number: AIR-LAP1242AG-A-K9.
I'm assuming that the 'L' in the model numbers means it's just lightweight, but searching Cisco's site and the Internet in general it's just not clear.
I know it works as a lightweight AP, can I run it in autonomous mode?
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Apr 18, 2011
Is it possible to make a bridge using a 1242 and a 1310? I have been able to get them to associate together and it appears it will function as a bridge. I have the 12(4) 253 JA IOS for both devices. I would like to use the g antenna on the 1242 for the bridge and the a antenna for wireless clients. The configuration on the web management appears to support bridge root and non root for both devices.
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Sep 12, 2011
I am trying to upgrade an autonomous IOS 1242 AP to LWAPP and I am having an issue with finding the right code to complete the upgrade. I have upgraded the AP to c1240-rcvk9w8-tar.124-21a.ja2.tar, but now I think I need a JX version of code to have it join a controller, and I can't find this anywhere on the Cisco site.
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May 9, 2012
i have 1240 series access points which is not joining controller 5500 series. [code]
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Aug 13, 2006
i need to change the IOS in a Ligthwiegth Access point and make it work as an Autonomus AP 1242. I have got the image but im not realy clear about the process. I got to enter the Ligthwiegth Access point true the console port but i dont know how is the upgrading process.
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Jun 6, 2012
One of Cisco Wireless AP 1242 installed in my premises restarts itself; AP is getting power from Catalyst 2960 POE. I am using multiple SSID on this AP. I have issued the show tech-support. I have seen below in tech-support System was restarted by unknown reload cause - reason ptr 0xF, PC 0x46FEB8, address 0x0? what could be the reason of restarting of AP. AP is in production since 1 year and it restarts seldom.
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Mar 24, 2013
When I tried to add new AP 1242 to my network I had following problem:
The Ap was constantly reloading and I was getting message
Wed Mar 20 13:32:12 2013 AP 'UBFT-E06-F0A-R09-0022.901b.a6ba', MAC: 00:23:ab:27:1f:30 disassociated previously due to AP Reset.
%CAPWAP-3-IMAGE_DOWNLOAD_ERR3: capwap_ac_platform.c:782 Refusing image download request from AP - unable to open image file /mnt/ap_bundle/ap.pri//c1240
I decidet to reinstall software on WISM 2 modul (7.2.111.3) this fix the problem and AP joined controller but during this process I have lost connection to 87 AP for 3 seconds and then they joind back again.
"disassociated previously due to AP Reset"
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Feb 9, 2011
I have 3 Cisco 1242 WAPs that I have deployed at a site that has NO RADIUS/AAA devices. I have given all of them a different channel (1,6,11), but the same SSID and crypto (WPA2-PSK). The issue is when a machine boots up it associates with the closest/strongest AP, but as the device "roams" it does not which to a different AP. It stays associated with the original AP until that signal is gone. Then it quickly associates with the closest AP with no problem.
How do I get the device to associate with the strongest WAP? I have research "fast roaming and WDS" but it seems like you need EAP/LEAP and they do NOT have that at all.
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