Cisco Switching/Routing :: 4510 - Intermittent Packet Drops In Network
Nov 30, 2011
We are facing issue related to STP.I am getting MAC FLAP error on Cisco 4510 switch. The effect on network is intermittent Pkt drops in the network. When I checked the specific Ip address I am getting the same with two different. [code] Vlan is created on CORE switch and assign priority 0 than CORE switch should be the Root. but instead Root port is becoming the port where server is connected. Server at last connected to CORE switch via HP switch via other Vlan to CORE switch and creating a loop as shown in Diag. [code] The Priority of Vlan 102 is changed and Root port has been changed due to that. The Bridge ID is the same as CORE switch.
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Mar 9, 2013
I can see drops on the 6509 Queue for interface gi1/6 , qos is disabled globaly with qos disabled all packets are in one Queue using best effort my question is if I can see drops using the sh queueing int Gi1/6 command why I am not seeing any drops when I run the Sh int (interface number ) command. [code]
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Mar 5, 2013
our C3750 like the one described here [URL]
We have the port on the switch set like this:
switchport port-security maximum 25
switchport port-security
switchport port-security aging time 2
switchport port-security violation restrict
switchport port-security aging type inactivity
In case a device connected to the port is inactive for more than 2 minues ( aging time ) the first frame/packet the device generates arrives to the port on the switch, but the switch does not forward it to the appropriate port ( discards it or whatever ).
So far I tested on
1 30 WS-C3750E-24PD 15.0(2)SE2 C3750E-IPBASEK9-M
2 30 WS-C3750E-24PD 15.0(2)SE2 C3750E-IPBASEK9-M
3 52 WS-C3750G-48PS 15.0(2)SE2 C3750-IPBASEK9-M
[Code].....
When we remove port security from the port, it works perfectly fine, as expected.
It seems this is not HW or IOS version related. It seems it is not a stack synchronization issue, it does not matter if a device is connected to the first or other stack member. I tested on C3560 too, here there are no problems, so seems it is 3750 related.
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Feb 28, 2012
I need topics on wireless network packet drops and how to improve the network on wireless lan
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May 11, 2013
We have Cisco router 2800 router which is directly connected to ASA 5510, till now there was no issue every thing was working fine, but from past 2 day's we are facing a problem, when we try to ping to any outside public IP their is a intermittent packet loss & same issue to the remote office through IPSec tunnel, We are able to reach our ISP router from outside whithout any issue & there is no packet Loss, if we try to reach the ASA their is a intermittent packet loss.
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Oct 31, 2011
I am having issues working on my QOS between 4510 and 3550 switch connecting on layer 3 through a service provider. I have class maps and policy map setup on both sides and then policy map attached to interfaces however i dont see any traffic matching in policy map on 3550 switch, i do see some traffic matching on 4510 but the speed with which its increasing has my doubts about it. When i make voip calls ( VOIP switches are sitting behind 3550 and are mainly 3550 pwr 24 port switches with phone ports configured for auto qos voip cisco-phone and trusting cos) i rarely see the RTP matching in class under policy map.
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Apr 11, 2013
I am currently running 12.2 (53) and am looking to move up to the 15+ train. Are there any pre-reqs prior to the upgrade that any one is aware of?Unfortunately I have no "lab environment" to test it in. I have production switches with minimal impact to the campus and if done late night I could have it restored back before open of business the following morning. My FW is up to the latest version and I have found nothing in the release notes specifically stating that there would require any stepped upgrades up to v15 and higher.
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Jun 24, 2011
I have two computers, both of them running Windows 7. One of them has been experiencing an odd problem for about six months now, and now that school is out I have time to mess with it. When I try to do certain things, the download speed periodically drops to zero. Specifically, I've noticed it when using Firefox and Steam, but also for IE and a few other browsers I installed for the sake of testing. I know I'm not *losing* connectivity, because everything that isn't specifically downloading a file works fine. Skype calls work fine, Utorrent streams at a steady rate, but for some reason Steam and Firefox have speed graphs that look like the heart rate monitor of someone with a very weak pulse. It starts off strong, a nice solid 1 MB per second, and then after 10-30 seconds it'll slowly decline to 0, and sit there for anywhere from 10 seconds to half an hour before picking up to full speed again. I've tried reinstalling drivers, I've tried buying a new network card, I've tried running antivirus scans, and I've tried uninstalling my antiviruses. The only thing that works for sure is putting it into safe mode. In safe mode, the downloads proceed smoothly. I tried making a list of everything that ran in safe mode, and then rebooted into normal mode and closed each nonessential process and service, but that didn't work either.
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Jun 11, 2013
We have an issue where switches are failing weekly in a switch closet. In the past month we have gone through several 3750G switches and a couple 4510s. The power supplies have eventually made a popping noise and had to be replaced. on the 4510s we've tried two chassis and gone through several power supplies.The switches have been behind UPS systems so should be receiving conditioned power.Could load from the PoE devices really be causing this? I wouldn't think it's power since they are behind a UPS.
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Jul 10, 2012
This has been happening repeatedly time to time! we just replace the part! But now it has come to trouble us again.It happening only in one module like 6 to 10 ports wont work.
we run IOS cat4500e-universalk9.SPA.03.02.00.SG.150-2.SG.bin will there be any bug in it?
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Nov 21, 2012
I have two servers on one subnet that each need to replicate to a single server on another subnet. They also need to replicate to each other. This replication is unidirectional so I will refer to the 2 server subnet as the source subnet and the single server subnet as the destination subnet. In order to keep this replication running without killing the MPLS links on either end, we are trying to use a policy-map that limits bandwidth from the source subnet.The Problem:We have created a policy that polices traffic during specific times of day and limits the bandwidth as prescribed, however, bandwidth is also being limited between the 2 servers on the source subnet which is not needed or desired.Class 512K set dscp ef police 1024000 bps 1024000 byte conform-action transmit exceed-action dropClass Map match-any 512K (id 4) Match access-group name DAGExtended IP access list DAG 10 permit ip host 10.20.0.3 host 10.20.0.10 time-range DAG-REP (active) (22793 matches) 20 permit ip host 10.20.0.4 host 10.20.0.10 time-range DAG-REP (active) (14156 matches)The service policy is applied on the input side of the 2 interfaces on which our devices are connected.As you can see, the access list identifies the interesting traffic as traffic from two specific hosts to one specific host. The problem we are having is that bandwidth is also being throttled between the two source hosts even though it is not defined to do so.What can I do to limit traffic from the two source devices to the single destination device without limiting bandwidth between the two source devices?
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Jul 23, 2012
We have multiple switches(Cisco 4510, 4507R, 3560's) within our network. I've been looking over the port settings between them and noticed that not all ports that are connected directly from switch to switch are trunked the same. Some are desirable on one switch and forced truck on the other switch.
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Sep 4, 2011
I am using Cisco 4510 Switch with Default LAN Base image. Now I have purchased 10G Upgrade license. The part number for Upgrade license is WS-C4500-10G-LIC. I have received a CD from Cisco (named as 'Includes License and Warranty'). Any License upgradation is required for this license? Or this is only a paper License.
I could not find out any .lic file on the CD. Also there is no paper with PAK.
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May 3, 2012
I just upgraded all of our switches on campus to Version 15.0(2)SG4 after about a month of testing. On two switches so far, we are seeing that clients can not connect, and the switch isnt detecting a link. I dont see anything out of the ordinary in int status, port-security, or errors on the interface. Plugging in a different computer does nothing. Only thing that works, is a shut, no shut of the interface. After that, its connected.
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Apr 4, 2013
I have a Catalyst 4510 that is running IOS version 15.X that has a bug and Cisco recommends upgrading the IOS. Are there additional steps required to perform an IOS upgrade due to licencing Cisco put in place?
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Oct 27, 2010
I am planning to enable MAC address filtering (one port on 4510 & another 3560). I want to allow only that MAC address to communicate via that port with the rest of the network and internet.
4510 has PC connected and 3560 had polycom connected. [code]
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Mar 2, 2013
I have cisco 2960 and Catlyst 4510 switches now we are planning to implement IPV6.
i have the fallowing IOS on my switches.
C2960-lanbasek9-mz.122-50.se5
Cat4500e-entservicesk9-mz.122-54.sg1.bin
The above ios will support for IPV6 or I have to purchase new IOS, which version will support.
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Feb 21, 2013
I got a 6509 version 12.1(22)E2 that I am replacing with a 4510E version 3.40SG with Supervisor Engine 7-E. The 6509 is configured with 20 channel-group for dual fiver connection to ten 3550 switches with trunking enabled with isl encapsulation. The 6509 is the VTP server to each of the 3550 switch clients. There are 40 Microsoft Servers attached ot the Gig RJ45 port modules.
I have attached the 4510 to the 6509 with dual fiber connection configured as a channel group with trunking enabled. I am configuring the 4510 the same as the 6509 except I have to use trunking with dot1q encapsulation because isl is not supported on the 4510. I no longer want to use VTP with the 4510 and have set the it as transparent mode. Each of the 3550 switches are changed from isl trunking encapsulation to dot1q and VTP mode is changed to transparent when they are moved from the 6509 to the 4510.
I want to move the switches over a few at a time and not all at once. The first 4 switches attached with no problems and ran with no problems for the user access to the servers still on the 6509 for a week. Then I found out DHCP was not working for the devices attached to the switches on the 4510. I moved one of our domain controllers form the 6509 to the 4510 to fix the DHVP problem. I have now added 2 more switches with users that use an application on a server still on the 6509 and they are getting disconnect errors after logging into it and using it. Other applications on different server also on the 6509 are having no problems. I moved the switches back to the 6509 to get the users up during business hours. I now plan on moving the server for the application that was failing to the 4510 in hopes that it will fix the problem.
Is there something I can do to speed up the connection between the 6509 and the 4510 so I can continue this transition without having to move the servers to the 4510 as I move the users?
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Sep 26, 2012
I need to convert configuration from CatOS on 4006 to IOS on 4510. I am unable to find the conversion tool.
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Mar 10, 2013
I am planning on deploying a 2960 switch and will need to uplink it to a 4510 switch. There are 2 TenGig Ports available and I was thinking of uplinking one of them to the 1Gb SFP port on the 2960. Would this work?
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May 1, 2012
I just upgrade a license on a cat 4510. The license installed but the EULA was not accepted and it will not upgrade to the new feature set.
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Apr 24, 2012
I am looking to find a command or counter to tell me if a cisco switch port on a 4510 was ever up and passed traffic. I want to shutdown all unused switchports on our access switches. But before I do that I need to make sure device is just not off or the person is away on vacation. If I do sh int interface, is there a counter I can reference.
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Mar 22, 2012
I have configured Span port on our 4510. We have an application 5view server to monitor trafic connected to G9/17 Since we have changed the network connection from physical Giga port and add a Port-channel instead, we don't see any more trafic from the new Port-channel to G9/17
We have the configuration below on our 4510 :
monitor session 1 source interface Gi4/6
monitor session 1 source interface Po20
monitor session 1 filter vlan 311 - 312 , 375
monitor session 1 destination interface Gi9/17
From the commands show, we don't see the trafic duplication from the source to the destination port :
Port Source
4510-5567#sh int po20
Port-channel20 is up, line protocol is up (connected)
Hardware is EtherChannel, address is 0016.9de2.a818 (bia 0016.9de2.a818)
[Code].....
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Mar 17, 2013
We are getting below errors on our Cisco 4500 Switche PS after Power Down activity.
Switch1
------------------ show power detail ------------------
Power Fan Inline
Supply Model No Type Status Sensor Status
------ ---------------- --------- ----------- ------- -------
PS1 PWR-C45-4200ACV AC 4200W good good good
PS1-1 off
PS1-2 220V good
PS2 PWR-C45-4200ACV AC 4200W err-disable good good
PS2-1 220V good
PS2-2 220V good
*** Power Supplies of different type have been detected***
00:01:02: %C4K_CHASSIS-3-MIXINPOWERDETECTED: Power supplies in the chassis are of different types (AC/DC) or wattage(code)
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Oct 23, 2012
I'm having some trouble with a 4510 Switch Line Card. I need some recomendations for troubleshooting it.We have some PoE phones connected to the card number 3. When those phones were restarted, they did not go up again. In order to discard wiring issues, we connected the phone directly to the card 3, and the phone did not go up. If the phone is connected to a different card, it goes up correctly.
Additionally, to restore the service, these phones were migrated to other cards, but when we disconnect the equipment, ports in line card 3 remain in an up / up state (and nothing is connected to those ports!!), and only reflect the actual state after restarting the port.What steps could I do in order to troubleshoot this issue?. What should I look for, or how do I discriminate the problem? Might it be a hardware issue, a PoE issue?
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Feb 17, 2013
I've got a Cisco 4510 which shows a system uptime in excess of 56 years. [code]
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Apr 23, 2013
Are you only able to have two sessions for port mirroring on a Cisco 4510?
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Apr 21, 2013
I have a brand new DAP-1522 A1 connected to an 802.11n wireless LAN in bridge mode. Running in the 2.4GHz band with WPK-2 and AES security/encryption.Everything runs fine 99% of the time, but once a day or so the wireless LAN connection on the DAP-1522 drops and then takes about two minutes to re-connect. It re-connects and then everything is fine for a day or so until the next dropped wireless connection episode on the DAP-1522. I know my 802.11n wireless network is 100% fine as during the dropped connection to the DAP-1522 I can connect directly to the 802.11n wireless network (running from my gateway/router) using my other computer, no issues.I've seen some posts on this forum that the A1 version of the DAP-1522 hardware is not 100% compatible with the 802.11n network standard and there will be intermittent wireless drops. If this is true, it's just insane. All I can say is I can't believe DLink would allow a product to be sold that won't work properly on 802.11n networks.I check the logs each time I see the dropped wireless connection and all that shows is the following.1) Negotiating connection 2) 4-way handshake success [mac address]There's no message in the logs about why the wireless connection dropped, but I assume it has something to do with re-newing a key for the wireless network as the successful key renewal messages are the only other messages in the log. When the wireless network dropped I don't see the successful key renewal message at the time I should see it.I thought this DAP-1522 would take 15 minutes to configure in bridge mode and then I'd forget about it. Spend too much time on this already, so a bit disappointed with this DAP-1522 and DLink tech support....though when it's connected to the 802.11n wireless LAN it works fine.
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Jul 16, 2012
For a week now, one of my Cisco 3945 routers displays, from time to time, the following message in its log:
2012-07-16T14:12:43.852017+00:00 cb00-r103 220: [syslog@9 s_sn="59"]: Jul 16 16:12:42 MEST: %SYS-2-INTSCHED: 'may_suspend' at level 4 -Process= "OSPF-100 Hello", ipl= 4, pid= 320
2012-07-16T14:12:43.852017+00:00 cb00-r103 221: [syslog@9 s_sn="60"]: -Traceback= 15CB073z 9081B7z 2851571z 11B7582z 11C275Ez 11C2906z 11C03E3z 1B907B5z 1B9064Cz 1BA5737z 172047Fz 47FFDCz 4D2EEDFz 4D2ED71z 4D2EA2Bz 4D30097z
2012-07-16T15:06:11.686817+00:00 cb00-r103 222: [syslog@9 s_sn="61"]: Jul 16 17:06:10 MEST: %SYS-2-INTSCHED: 'may_suspend' at level 4 -Process= "OSPF-100 Hello", ipl= 4, pid= 320
2012-07-16T15:06:11.686817+00:00 cb00-r103 223: [syslog@9 s_sn="62"]: -Traceback= 15CB073z 9081B7z 2851571z 11B7582z 11C275Ez 11C2906z 11C03E3z 1B907B5z 1B9064Cz 1BA5737z 172047Fz 47FFDCz 4D2EEDFz 4D2ED71z 4D2EA2Bz 4D30097z
[code]....
It never happened before and the configuration did not change. The only thing that happened, the WAN connection (point-to-point to a Cisco 3845) went down and the router rebooted while the WAN was down. When the WAN came up again, everything went fine, until about an hour later and the first occurrence of this mentioned log.This 3945 does establish an IPSec tunnel with its peer (the 3845) and all the traffic, including OSPF, is going through the tunnel.
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Nov 23, 2011
I found intermittent link down(20~40 seconds average) occurred about 1~10 times every month. SAP reported a lot of active connections are disconnected and I used a batch to ping and found "requested time out" about 30 seconds.And Windows, SQL server, Nexus 5010 do not show any errors. We run cluster and cluster does not fail over.And I don't know which cables or nics cause this issue. When it happened, almost all servers are unreachable. For example, SQL server 1 -> SQL server 2, IBM HS22-1 -> SQL server 1. However, some connections are not dropped sometimes. It varies each time.PS: I run this topology last year without any problems but it started intermittent link down from 2011/1/7. Because there is no errors in Nexus 5010, it is difficult to troubleshoot. Cisco TAC recommended us to implement virtual port channel yesterday. Could I use "errdisable detect cause" to detect what caused the intermittent link down? Is there any error logs or switch parameters/status can use to troubleshoot?
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Mar 12, 2013
I received the following info from Cisco's TAC and wanted to inquire further before I start reconfiguring the switch:
In a redundant Sup-6E setup, the following configuration is supported :
- 1 TenGig uplink on Active Sup and 1 TenGig uplink on Standby Sup
- 1 TenGig uplink on Active Sup and 2 Gig uplinks on Standby Sup
- 2 Gig uplinks on Active Sup and 1 TenGig uplink on Standby Sup
- 2 Gig uplink on Active Sup and 2 Gig uplinks on Standby Sup
If you invoke shared backplane mode, the following configuration can also be supported:
- 2 TenGig uplinks(blocking) on Active Sup and 2 TenGig uplinks on Standby Sup
- 2 TenGig uplink(blocking) on Active Sup and 4 Gig uplinks on Standby Sup
- 4 Gig uplinks on Active Sup and 2 TenGig uplinks(blocking) on Standby Sup
- 4 Gig uplink on Active Sup and 4 Gig uplinks on Standby Sup
Here's the command and information about the "shared-backplane" mode :- [URL]
Currently, we have 2 SUP 6-Es(Module 5 - Active and Module 6 - Stand-by) setup in a redundent mode. I am planning on changing the redundent mode to the shared backplane mode so I can use 2 TenGig converters to uplink 2 access-switches. We purchased 2 TenGig converters and here is how I am planning on using them:
1- One will be used to uplink to two 3750 switches(stacked)
2- One will be used to uplink to a 2960 using a Gig SFP
My questions are:
1- Do I have to install the 2 TenGig converters(4-Gig Uplinks) in the same Module? Or can I use one one in module 5 and the second one in module 6?
2- Will changing the redundant mode to the shared backplane mode require rebooting the switch or disrupt the funtionality of the other linecards?
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Feb 11, 2013
We have a Cisco 1760 router . We are facing sevier packet drops in the serial interface.
When i swap the router with another router link is working working fine.
Troubleshooting steps taken
1. Swap the serial cable with another working cable : no change in state
2. Reconfigure the encapsulation commands (with PPP and HDLC) : no change in state
3. Try with a decreased MTU packet Ping : no change in state
4. Decreased the Input queue and increased the output queue size using hold-queue in command : Comparatively the packet drop is reducing but still a 10 percent drop is happening.
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Jan 30, 2012
MIB OID and the values.also i want to know the values og output packet and output packet drops MIB OID values of POS interface on GSR router (12000).because i am getting many output packet drops on these pos interface.how do i get these values from the router.
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