Cisco Switching/Routing :: WS-C3560CG-8TC-S / Speed Reduced And Drop Packets With QoS?

Apr 11, 2012

I put a QoS in a  WS-C3560CG-8TC-S  version 12.2(55)EX2.  in our lab file upload or download speed much reduced and drop the packets with QoS everyting is fine without QoS
Here is the config: My question is why I speed reduced a lot and packets to be dropped with QoS.everything is fine WITHOUT QoS.

class-map match-any VoIP  description Voice IP Phone RTPmatch access-group 157
class-map match-any WEB  description Internal Web, SSL Web, DNS query, Pinnaclematch access-group 153
policy-map QOSMARK
class VoIP  set dscp ef
 class WEB  set dscp cs3


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Cisco Switching/Routing :: 1760 / Make Router To Drop Packets Instead Of Rejecting Them?

Mar 31, 2012

I've got a 1760 router which uses port forwarding (25, 80 and 443) for my internal network services. If, let's say, I try to open a FTP connection on the router, of course the connection will be refused. Is there a way to make the router DROP the packets instead of rejecting them? My Linux iptables configurations drop packets who fail the firewall test, so I would like the router to perform that behavior.Commands for port forwarding:ip nat inside source static tcp 80 int f0/0 80 (these work fine)

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Cisco Switching/Routing :: Ios Update For 3560-C / WS-C3560CG-8PC-S

Apr 7, 2013

I plan to buy WS-C3560CG-8PC-S (Catalyst 3560-C) for my home lab. I just created a new account on [URL] (I did not register any equipment or contract for that new account). I was able to download ios 12 and 15 for that switch.- Will I be able to flash one of these versions when I will have the new switch ?Cisco warranty for these Switchs (Enhanced Limited Lifetime Hardware Warranty,[URL] says NO OS Software Updates included. Does tha mean that I can download ios updates but won't be able to flash the device or use it ?- Do I really have to buy Smartnet support to be able to update ios for that switch ?

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Cisco Switching/Routing :: WS-C3560CG-8PC / IP Connectivity Without Route Or Default Gateway

Sep 19, 2012

Recently we observed that newly installed WS-C3560CG-8PC access switches are able to communicate without a default route or default gateway.The 3650 switches are used as a layer2 access switch behind a layer3 distribution/core. They have only the management VLAN configured for IP with a single address.
The ARP table looks like there is an implicit proxy-ARP request sent for any IP address.
We definitely have no configuration whatsoever which would explain this.
Is this a new feature? We don't observe that with the older 2960-series...
Here is a brief trace of what's happening (debug arp):
Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to, timeout is 2 seconds:
Sep 20 14:44:06.706: IP ARP: sent req src 1833.9dc9.wxyz,
dst 0000.0000.0000 Vlan1
Sep 20 14:44:06.711: IP ARP: rcvd rep src 2c54.2dd3.wxyz, dst Vlan1..

The mac address if of course the mac address of the layer 3 interfaces of the distribution switch, no surprise here (proxy ARP is turned on by default).
Why is the 3560 sending out proxy arp requests without being told to? As far as I understood proxy ARP on Cisco IOS it only means it will reply to a proxy ARP request but will not send out proxy ARP requests by default.

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Network Upload Speed Is Randomly Reduced?

Jan 2, 2013

First discovered this problem because I was unable to connect to a particular web site that was functional according to a friend that I was talking to on the telephone while trying to connect.

Problem: Network UPLOAD speed is randomly reduced from 2Mb to 600Kb while download speed seems unaffected (Abt. 30 to 50Mb). First eliminated the router, modem and cables as suspects working with ISP tech support. CAT 5 cabling to router and cable modem. Then I discovered that another machine on the network did not have this problem. I then discovered that disabling the network and re-enabling the network cured the problem.....temporarily. Downloaded and installed latest NIC driver from MB web site. No solution. Downloaded and installed latest NIC driver from Realtek web site. No solution. Updated MB BIOS. No solution.

MB= Asus M5A97 EVO
CPU: AMD FX-4100
OS: MS Windows 7 Professional 64-bit SP1 (Latest updates)
RAM: 8.00 GB Dual-Channel DDR3 @ 802MHz (11-11-11-28
NIC on MB Realtek PCIe GBE

Disabled TCP/IPV6. No solution. I suspect it is one of the "Advanced" settings for the Realtek PCIe GBE, but I don't know what they do. Anytime I disable and re-enable the network adapter my upload speed returns to normal. I haven't been able to isolate a particular action that causes the slow-down. The attached pics show speed test, before and after disable - re-enable network adapter. Same server.

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Software To Reduced Speed Of Cybercafe Server

Jan 21, 2013

with SOTFWARE to reduced the speed of my cybercafe server against my client that eat up my bit( reducing the speed of heavy downloading

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Wireless Connection Speed Reduced By Half?

Aug 3, 2012

I noticed my wireless connection was decently fast for my needs which was 13-15 up /5 down. I am in the next room from my study and around <10 ft away from the modem in the study. However today the internet was extremely slow for everyone in the house so I went to reset the modem. After resetting the modem I noticed that the internet speed went a bit up and so I used to see how fast the connection was in the study. The computer in the study is connected with a ethernet cable to the modem. I was amazed that the speed in the study was nearly double the amount. I understand that wireless connections are undoubtedly slower than a wired connection, but is it normal for the speed to drop by half when I am <10 ft away from the modem?

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Cisco Switching/Routing :: 2960 - How Much POE Watts Can Be Reduced On Certain Devices

Jun 21, 2012

I'm getting currently installing a full Valcom IP sound and clock system , along with all new Cisco 2960 gig ps-l switches. All devices run off of POE. In the past, I have read that most AP's only draw approx. 12.5 watts (va's). But you must take into account length of wire to add your additional draw which puts you at the 14.5 they auto draw.  My question being that the clocks I have auto draw 15.4 watts, which is eating up my 370w of power on my switches. The spec sheet on the clocks show only a power consumption of 4.5 watts.  So today I turned a few ports down to 4.5 watts and everything still worked fine.. Any experience by chance with Valcom devices or just turning the power down on devices in general? I can imagine that a clock is drawing enough to care about the length of the wire run.

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Cisco Routers :: RV220W Sudden Reduced Upload Speed To FTP / NAS Server

Apr 22, 2013

In my last thread I had difficulties setting up access to my FTP server through the RV220W router. After getting it to work, I faced a new issue of reduced upload speed. 240ish KB/S which is obviously ridiculously slow.  After much toying around, I finally got it to work again, after doing a factory reset of the router. But today when I wanted to upload to my friends NAS, I suddenly am faced with reduced speeds yet again(400KB/S)!  settings, with one firewall rule added, to allow access to my FTP.  Other than that, I also enabled jumbo I tried disabling that again. But that did nothing.  Also tried disabling every firewall feature under "attack prevention" but, didn't seem to work either.I didn't reboot the router with each change, as that would make things take a lot longer....and didn't think it should be necessary?
I'm starting to get more and more tired of using my RV220W....seems slow and buggy..when I do a online speedtest, I get a 30Mb/30Mb down/upload rating, which matches the rating I pay my ISP for.... And I have a fiber connection.

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Cisco Switching/Routing :: 3750G - Maximum Throughput Reduced By Stacking Or Any Of Other Features

Mar 21, 2012

We are experiencing output drops on our 3750G-12S (IOS 12.2.55).
I have monitored throughput with MRTG, but it doesn't seem that high compared to that the 3750G is supposed to handle 17.8 Mpps.
The 3750G's are stacked, running ospf, qos, multicast (IPTV) and etherchannel.Is the maximum throughput reduced by stacking or any of the other features?
I don't know if one can estimate what the maximum throughput is per ASIC or per port, but on one of the ASICs that is having drops the peak unicast load is 1.3 Mpps and multicast Mpps is 0.9 Mpps. Total ~2.2 Mpps.
This doesn't seem high at all and I don't understand why the drops are appearing. What I can do to find out the reason for these drops?

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Cisco Firewall :: How To Configure ASA 8.2(4) Not To Drop Packets With IP Option 7 (record Route)

Oct 21, 2012

How to configure ASA not to drop packets with ip option 7 (record route)?  According to the docs, ip inspect ip option will drop all ip option packets except 0,1,and 20 (EOOL, NOP, or RTRALT):
"If an IP header contains additional options other than EOOL, NOP, or RTRALT, regardless of whether the ASA is configured to allow these options, the ASA will drop the packet. "
Also, policy-map type inspect ip-options treats only these 3.

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Cisco Switching/Routing :: 6509 Randomly Drop Packet

Nov 1, 2012

My workstation( directly connected to 6509_1 switch. 6509_1 is gateway with ip Sometimes routing stop working, but after 3-5 minutes all back to normal.When issue occur i can't ssh to 6509_1, but i connect to second 6509_2 ( and i can ssh to 6509_1 from it.Then form 6509_1 i try to ping my workstation Wireshark on my workstation show that packet arrive. My workstation reply on it, but switch not accept it.How it possible? As I say after sometime all go back to normal without any changes. [code]

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Cisco Switching/Routing :: N7K No Drop In Service To Existing VLAN

Aug 8, 2012

When you use the command switchport trunk allowed vlan add [vlan-id]There should be no drop in service to the existing VLANs, correct?  I am trunking from a 7K to a 2960S via 2G PoCh.

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Cisco Switching/Routing :: Multicast Data Drop On 3750X?

Apr 23, 2012

We are currently experiencing random multicast data dropouts on ports that are connected to a 3750X in VLAN ports. A test PC was connected to a routed port and we do not have any dropouts of the multicast data.We also took a 2960G and plugged it into VLAN ports on the 3750X.  Any test PC that is on the 2960G does not lose traffic. The traffic only drops on PCs that are connected to a port on the 3750X that is in a VLAN.  The data drops are random and last approximatly 55-59 seconds before we start receiving multicast traffic again.
I do not see any input/output errors on the interfacessh platform port-asic stat drop also show no drops
CPU runs at about 50% on the 3750X
Below is the configuration of the 3750X
Building configuration...
Current configuration : 8454!!version 12.2no service padservice timestamps debug datetime msecservice timestamps log datetime msecservice password-


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Cisco Switching/Routing :: Trigger Packet Drop On WS-C4948

Feb 25, 2013

I am running  (cat4500-ENTSERVICES-M), Version 12.2(53)SG2 on the switch. I have a scenario where I have 3 end user equipments connected to a Cisco 4948 L3 switch. At the switch end port 1/46, 1/47, 1/48 are the terminating points for these 3 devices . I have added these three ports to VLAN140 (switch port access vlan140 on the gig interfaces).

The device connected to 1/46 is the one I'm testing some signalling features on. My requirement is to have intermittent packet drop on this interface so that my signalling associations would go down now and then. I'm trying to simulate a real-time network congestion/latency/packet drop in a simple manner.

I do not want to shut/no shut the 1/46 intf to cause this. Some way to achieve intermittent packet drop on this gig1/46 intf ?

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Cisco Switching/Routing :: C3560 Output Drop Without MLS QoS Enabled

Nov 24, 2012

We are seeing output drops on a C3560 switchport, this port does not have QoS enabled -- application does not need special qos treatment, as long as packets are not droppd, so I suppose all traffic will share the same queue? then how should I read the output of "show platform port-asic stats drop" which indicates that it is queue 3 weight 2 drop? I am wondering what is the best way to fix this? enable mls QoS and increase queue 3 bandwidth share on this interface or just increase the output queue depth?
switch#sh mls qos interface gi0/1
QoS is disabled. When QoS is enabled, following settings will be applied
trust state: not trusted


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Lot Of Drop-outs / Random Disconnections And Slow Speed?

Sep 25, 2012

I have setup the existing wifi router (couple of years ago) so do have the basic networking knowledge but am not up-to-speed with all the latest developments in the industry2. ISP have provided a '******' ADSL modem that i need to connect to get this whole netwrok working. its only supports ethernet connections - (i live in a third world country)3. I have installed a TP-link Wifi router (WR841Nd). The modem on stand-alone basis is fairly decent, covers decent range on ground floor (my house is fairly big and is double story building) but with few dead spots. It supports N series so speed is quite good as long as one is within range.

Problemi have been living with it for couple of years but since recently i have been experiencing a lot of drop-outs/random disconnections and slow speed. I have tested my wifi router at friend's place and it showed no signs of problems so it has to be my ADSL modem (phone line is fine, though i am not close to exchange but that is not an issues as my neighbours are using the same phone line/ISP and they dont have an issue)another problem i have is the coverage, my current wifi only covers the ground floor and i would like to extend this to upper portione am looking to change my ISP provided ADSL modem. The problem is i dont know if i buy an ADSL modem off amazon and whether it would work or not because the setup is not straight forward and the ISP staff is corrupt. They dont provide with quality hardware neither do they have technical competence so i literally have to beg them at time to at least come and see the problem.Question1: ISP provided ADSL modem replacementi know the settings for ISP modem so i can search how i can replicate the same with Billion but can this work?Question2: RAnge ExtenderI am thinking of buying couple of powerline wireless extenders from netgear.

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Belkin Routers :: Wireless Speed Drop Down For F7D2301 V1?

Nov 29, 2012

Hardwired into the modem speeds are great...wireless speeds drop down to half.

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D-Link DIR-655 :: DL Speed Drop From 26mbps To 10mbps When Connect

Jul 23, 2011

I have used DIR-655 (HW:B1 FIRM: 2.00NA) with Motorola SB6120 for sometime without any incidents.  My dl speed usually is around 26mbps. Lately, it happens twice that the dl speed drop to 10mbps. If I connect the SB6120 directly to my PC, the dl speed is 30mbps. Is my DIR-655 dead?

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Cisco Switching/Routing :: 4506E Interface To Reset And Drop Connections

Dec 29, 2011

I started having connectivity issues between my core 4506E (Sup7E) and Cisco 2960S. There were input and CRC errors on Te int (SFP 10Gb - LRM) on 2960S, which cause the interface to reset and drop connections. While troubleshooting this issue, I have replaced patch cords and also had the tech checking the fiber. He said that there was some residue on one of the connectors, so the light levels fluctuated in 1300nm, but worked fine in 850. Well LRMs are using 1300, so he re-polished the tips, which worked to stabilize the light levels. After all that, I was still receiving the input/CRC errors, but the connection was NOT dropping. As my last resort I swapped the SFPs between the core and 2960, thinking I should start having issues on the core end. Well, here's what happened: I stopped receiving input/CRC errors on 2960 (also no errors on the core), but 2960s started generating Rx power high alarms: [code]

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Cisco Switching/Routing :: 2960 S Supervisor TxQueue Drop Statistics

Jul 25, 2012

I have users connected to a 2960-S running 12.2(53r)SE complaining of slow network, specifically Internet performance while the upstream 2960 on the same vlan has no such issues, so I don't suspect link congestion on the face of things.I'm planning on upgrading the code, but wanted to see what could be checked first. I'm seeing some drops but could use some tips on how to proceed from here as to what might be the issue. CPU is under 10% whenever I check it.

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Cisco Switching/Routing :: 3845 Output Packet Drop In Some Of Interfaces

Nov 27, 2011

In my cisco 3845 router I can see output packet drop in some of the interfaces.I suspect that router is processing packet beyond its mix throughput limit. Moreover when i run show int fax/y switching command I can see packet drop by RP process.

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Cisco Switching/Routing :: What S The Fabric Speed (backplane Speed) Of A Nexus 2232 10G EX

Jan 12, 2013

What s the fabric speed (backplane speed) of a Nexus 2232 10G EX?What is the forwarding rate (Mpps) of the same 2232 FEX? 

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Linksys Cable / DSL :: X3000 Drop Out And Lack Of Upload Speed?

Jul 14, 2012

I recently upgraded to 1.0.3 fw on my x3000 in the hope of getting rid of the issue with my upload speed. However, now it is denying me connection to the outside world about once a day. It is getting an ip, even if I am renewing the IP address.I am using it on my Fullrate broadband 20/2 connection, and I can at most get 1mbit UL, but with the old router, I could get 2.1mbit. I bought this one because the other one sucked (the standard from my ISP).I have set the router up as the old one was, however, it is still slow, and now it also needs reset every day.

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Cisco Switching/Routing :: 6500 - Randomly Devices Will Drop Offline And Then Come Back

Aug 28, 2012

I have a network that has a pair of 6500 switches on either end, running HSRP. In between each 6500 are two to three ruggedcom switches. They are connected to each other and the 6500's by trunk ports in a straight line. The 6500's see each other as CDP neighbors, and the 6500's can see the rugged- com as LLDP neighbors (ruggedcom only supports LLDP).
The issue is that randomly devices on the ruggedcoms will drop offline and then come back. The problem is that the devices that drop offline are all in the same VLAN, so it appears like a virus -  i.e. one device drops off, then multiple. Eventually the HSRP starts flapping between the two 6500s and this causes havoc on the network.I'm almost to the point of taking a laptop and plugging it into one of the ruggedcom's to see traffic, but the issue is that the ruggedcoms are outside in cabinets that laptops shouldnt be exposed to.

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Cisco Switching/Routing :: WS-C2960S Output Drop Values Change Randomly

Oct 19, 2011

I have a stack of 4 Cisco WS-C2960S-48FPS-L switches running c2960s-universalk9-mz.122-58.SE1 code.  One of our network monitoring tools is indicating discards on a certain port on the switch.  Upon further investigation I am seeing the Total output drops values change in a very odd manner.
The numbers seem to go from 573 to 1146 to 1719 then back down to 573 and it starts the same pattern over: [code]

The port utilization is quite low, the highest I've seen over the past 7 days is 3.5% with a polling period of every 30 seconds using Statseeker.  Yet the discards are bouncing all over the place.
I've searched though the bugs for 12.2(58)SE1 and didn't see anything.

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Linksys Wireless Router :: E4200 Speed Drop Using Ethernet Cable

Oct 4, 2011

I'm pretty new to networking.  Purchased a E4200 for my home line.  When i connect directly through the modem i see speeds of about 600mbps but when i connect through the router via an ethernet cable on an empty port on the back of my e4200 my speeds drop to about 180mbps.  I expected a speed loss going through wireless but why i am experiencing a speed loss by using the ethernet as a passthrough?  I thought the ethernet ports on the e4200 were gigabit and support up to 1000mbps? 

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Cisco Switching/Routing :: 3950 - High Latency And Packet Drop Towards Access Switches?

Jan 27, 2013

My network Infrastructure consists of 2 core switches(cisco 3950, 24 port) and 3 access switches (cisco 2960G, 48port). No distribution layer.Both Core switches are connected to the BVI of a VPN router.PVST is running in all switches. The STP results are all good. We have 3 VLAN's in the LAN an IP routing is enables in the core switch. The network diagram is attached.
The issue we are facing is that , we get intermittent packet drops while pinging towards the access switches, and there is always a higher latency towards these assess switches.These issues are present even with no other users using the LAN. But these issues are not present while pinging towards the GW.
I guess, it is because of this, we have issues the accessing file server in the LAN. How do we go ahead with the troubleshooting. Will upgrading the IOS resolve this.The present version details is..
WS-C2960G-48TC-L   12.2(44)SE6           C2960-LANBASEK9-M

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Cisco Switching/Routing :: 6500 - Show Platform Port-asic Stats Drop Command?

Feb 21, 2012

On a 3750 you can do a show platform port-asic stats drop command.  Is there a corresponding command for 6500 chassis?

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Dec 26, 2012

We have a customer who uses about 20 x c2960's switches for access layer and 2 x c3560e for distribution layer. C2960's uses C2960-LANLITEK9-M , Version 12.2(58)SE1. Everything was working fine. Now we got information, that sometimes there are problems with connectivity. Customer tries to reach internet.
SW11#sh int fa0/18       
FastEthernet0/18 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is e8ba.806a.4412 (bia e8ba.806a.4412)


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Cisco Switching/Routing :: Ignored And Overrun Packets On 7204VXR?

Feb 21, 2012

I am seeing packets being ignored on GigabitEthernet0/0, but can't find any reason what the reason can be for that. So far calculated that about 3% of the traffic is being ignored. If it was caused by shortage of input buffers, I would expect to see increasing counters somewhere at no_buffer, but that is not the case. The average txload and rxload on the router is low all times.

#sh int g0/0GigabitEthernet0/0 is up, line protocol is up  Hardware is i82543 (Livengood), address is 0012.7f8a.8008 (bia 0012.7f8a.8008)  Description: ;Link to NORISMP998 G5/2  Internet address is  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,     reliability 255/255, txload 2/255, rxload 2/255  Encapsulation ARPA, loopback not set  Keepalive set (10 sec)  Full-duplex, 1000Mb/s, link type is autonegotiation, media type is SX  output flow-control is XON, input flow-control is XON  ARP type: ARPA, ARP Timeout 04:00:00  Last input 00:00:00, output 00:00:00, output hang never  Last clearing of "show interface" counters 8w2d  Input queue: 0/75/522186/1117 (size/max/drops/flushes); Total output drops: 0  Queueing strategy: fifo  Output queue: 0/40 (size/max)  5 minute input rate 11667000 bits/sec, 2319 packets/sec  5 minute output rate 9377000


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Cisco Switching/Routing :: 3750x 24s Not Forwarding Packets

Mar 1, 2013

We have a 3750x 24s acting as a root switch for about 10 other 3750x's. Everything else seems fine, but the device stopped forwarding packets to the applied static route. [code]

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Cisco Switching/Routing :: 7200 - Netflow / Packets Not Sent?

Jul 23, 2012

router 7200 (12.2(33)SRE1)
two interfaces with traffic going through, placed in a Data-VRF
Another physical interface and loopback interface in the global routing-table.
ip flow ingress on all physical interfaces configured
It was running for at least a year: I was getting netflow packets on my analyzer from the box. Since a couple of weeks I get no netflow-packets anymore.debug ip flow export  tells me "IPFLOW: Sending export pak to ... port 2055"
But the packet is not leaving the box. By setting up an ip sla monitor udp-echo I simulated some traffic (udp/2055) which is leaving the box.


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