Cisco WAN :: 7204VXR OC3 Output Drops Increasing

Jul 29, 2012

Why my OC3 interface is showing increasing output drops its starts happening as soon traffic exceed 60Mbps   ( FYI my traffic never exceeded 75Mbps MAX, and circuit is 150Mbps from carrier , full OC3)
 
Below are few stats as starter. IOS i am using is c7200p-is-mz.122-31.SB10.bin
 
sh int pos1/1
POS1/1 is up, line protocol is up
Hardware is Packet over Sonet

[Code].....

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Linksys Wireless Router :: EA6300 With Less Coverage - Increasing Output Strength?

May 12, 2013

I just upgraded my router from the WRT54GL to the EA6300, and it appears there is less coverage with the new unit.  Previously, my neighbor could share my router and now with the EA6300 my phone switches to 4G at the end of the driveway.  Has anyone seen any specs which publish to output of the ea6300?

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Cisco WAN :: 3750X-24T Output Queue Drops

Mar 22, 2013

I have a 3750X-24T in our production environment that is showing very high number of OQD's in the 'show int sum' output for 4 of the Gigabit interfaces; the interfaces are each in a seperate port channel and there are no OQD's for the relevant port channel and there are no output drops showing in the output for the 'sh int' command for each interface.
 
The following are the OQD's for the relenvant interfaces
Gi1/1/1:     0
Gi1/1/2:     0
Gi1/1/3:     0
Gi1/1/4:     0
Gi2/1/1:     4252879251
Gi2/1/2:     4251090833
Gi2/1/3:     4251754140
Gi2/1/4:     4294942102
Po1:          0
Po2:          0
Po3:          0
P04:          0
 
Gi1/1/1 and Gi2/1/2 assigned to Po1, and so on.
IOS version: C3750E-IPBASEK9-M 12.2(58)SE2

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Cisco WAN :: ASR 1001 Unexpected Output Drops

Jan 31, 2012

I have an issue with an ASR 1001. The problem occurs with MQC shaping applied to a gigabit interface in the outbound direction. The CIR of the provider we are using is 100Mb/sec, so we are shaping to that value. However when reported traffic levels are about 60Mb/sec, we see a steady increase in output drops. [code]
 
I have also tried increasing the hold queue, however this does not work with the drops. Increasing the shaping rate to 200Mb/sec gets rid of almost all the drops (not quite all!) but is not what we need. I think that we should see some drops when rates spike above 100mb, however the amount we are seeing seems excessive?

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Cisco WAN :: Output Drops On 7613 WS-X6748-GE-TX?

Jan 4, 2011

We have a 7613 w/ WS-SUP720-3BXL running 12.2(18)SXF11.  We have a 48 port WS-X6748-GE-TX that has one interface that keeps getting output drops for anything over 200Mb/sec.
 
See the attached file which has more details and show results. 

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Cisco WAN :: 6500 - Input / Output Drops

Feb 7, 2011

I have this topology in part of my networ:k
 
Cisco7200---Cisco6500---Cisco3560---LAN1
                        |
                 Cisco3560
                        |
                     LAN2
 
All devices are interconected via optical 1Gb/s links. There is no QoS implemented on any device and all VLANs are allowed on all interfaces.
Also all links are trunks (with many VLANs)
 
In LAN1 there was a layer 2 broadcast-storm and 4000packets/s was comming to rest of the network (in one particular VLAN).
 
 1) 7200 with G1 should be able to handle traffic up to 500Mb/s, but a lot of users experienced drops on traffic via 7200.
(CPU load was around 10%).
 
2) Why do I have input drops on 7200 on link toward 6500 if CPU was normal. Broadcast comming to this interfaces were cca 4kpps. But since it's destination is not on router these packets should be rejected on interface controller. Is that right? (7200 doesn't even has dot1q subinterface in that VLAN but since 6500 allow all VLANs on its trunk these packets reach 7200)
 
3) Why do I have output drops on Cisco 6500 (it is here as layer 2 device only)? It is max 160Mb/s in output direction. It has WS6724 card with DFC (there is no oversubscription).. Shouln't 6500 send traffic as fast as interface allows (up to 1Gb/s). Am I righ't?
 
4) After all how coul'd 6500 now if 7200 can't handle these traffic?Output drops should be only seen if QoS is enabled (i.e. shaping), or if there is oversubscription on the linecard?

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Cisco WAN :: Output Drops On ATM Interface 887 Router

May 14, 2012

I have cisco 887M-K9 router and I can see output drops are increasing on ATM interface. [code]

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Cisco WAN :: 2921 - Diagnose Output Drops

Mar 2, 2011

I have some problems on my newly purchased wan routers Cisco 2921 with 15.1T3
 
on the wan interface is see "ouput drops" this is gigabit ethernet on both sides , but the ISP delivers 30mbit/s on this line.
 
ellslr1#sh int gig 0/2GigabitEthernet0/2 is up, line protocol is up  Hardware is CN Gigabit Ethernet, address is 1cdf.0f26.beb2 (bia 1cdf.0f26.beb2)  Description: *** WAN ***  Internet address is x.x.x.x/x  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,     reliability 255/255, txload 1/255, rxload 1/255  Encapsulation ARPA, loopback not set  Keepalive set (10 sec)  Full Duplex, 1Gbps, media type is RJ45  output flow-control is unsupported, input flow(code)

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Cisco WAN :: 2950 High Output Drops

Sep 27, 2011

Am experiencing high output drops o int Gi 46,47,48 2950 int fa 22 23 and 24 are conneced to 3750 Gi 46,47,48 core sw1 3750 is connected to 2950 sw2 and vice versa

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Cisco WAN :: Output Drops And Input Errors On 7204 With NPE 300

May 11, 2011

My router, a Cisco 7204 with NPE 300, is experiencing output drops and input errors on a fastethernet interface. I have a 100Mbps connection with less than 15Mbps utilization at peak times.
 
FastEthernet1/0 is up, line protocol is up  Hardware is DEC21140, address is 0014.a985.1a1c (bia 0014.a985.1a1c)  Internet address is 38.102.66.134/30  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,     reliability 255/255, txload 3/255, rxload 1/255 

[Code]....

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Cisco WAN :: 2960 Switch Total Output Drops?

Jul 4, 2011

I have a 48 port 2960 switch with 2 10/100 ports ( fa0/46-47) setup in an etherchannel with a 2950 48 port switch. I am getting total output drops on port fa0/47. [code]

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Cisco WAN :: 1941 - Output Drops Even Low Input Rate

Mar 18, 2012

I found increasing of total output drops and output queue drops even input rate was low and no qos apply on this interface. I plan to increase hold queue out for output queue.
 
Router 1941, 15.0(1)M4
Serial0/0/0 is up, line protocol is up
Hardware is WIC MBRD Serial

[Code]....

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Cisco Switching/Routing :: 2960 High Output Drops

Aug 2, 2010

I have quite a few 2960's in a manufacturing environment that are experiencing a large number of Total Output Drops.  The gigabit uplinks arn't even close to fully subscribed and if I'm lucky they run at a peak of 4 - 5 Mb on a 1Gb uplink.  Something really funky is going on.  The individual switchports seem to have the total output drops and the uplinks at 1Gb do not have any output drops and never peak above 20Mb over a 3 month span on a 1Gb link.

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Cisco :: 12000 SNMP MIB OID For POS Interface Output Packet Drops

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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Cisco Switching/Routing :: High Output Drops On 3560G?

Oct 8, 2012

We are seeing some high output drops on our 3560G's and I'm wondering if there is anything I can do to solve this, or should I just be looking at an upgrade.I do not have qos enabled:
 
do-rs-ah-3560g#show mls qos
QoS is disabled
QoS ip packet dscp rewrite is enabled
 
I don't have anything special configured apart from some trunk ports, otherwise its mostly defaults.Should I enable qos and tweak the buffering?

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Cisco Switching/Routing :: 3560X Output Drops To ASA 5505

Feb 21, 2012

I have a 3560X that is directly connected to an ASA 5505.  I am seeing output drops on the 3560X interface that connects to the ASA.  Below are the troubleshooting commands I have ran, but I don't see any indication to what is causing the problem.
 
3560X
show run int gig 0/24
!
interface GigabitEthernet0/24

[Code]....

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Cisco Switching/Routing :: High Output Drops On 6500

Nov 23, 2012

Have got 2 6500 in VSS. I'm seeing unsual high output drops. IOS Version: advipservicesk9-mz.151-1.SY.bin
 
Seeing too much output drops on interface ( in millions). When checked buffers ( output pasted below), it also shows enourmous drops.Not too sure, but is this normal or is there something fishy; which needs to be investigated. [code]

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Cisco Switching/Routing :: Output Drops In 7200 Gig Interface

Mar 13, 2012

I have too much output drops in my cisco 7206 VxR NPE G1 router. I'm doing dot1Q on this interface and is connected to  switch , i changed the router and IOS but still the error is same . What can be the reason . The interface on switch and router are 1000/Full and i changed the cable also . The traffic only comes about  max70Mbps and it is really confusing. [code]

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Cisco Switching/Routing :: Total Output Drops On Interface On A Cat-6506

Nov 29, 2011

I have 2 Cat-6506's that are used for my WiSM's.  The only thing in both Chassis is 2 X WiSMs a SUP-7203A and a 6516A line card.The only connection between the rest of the network and these chassis is on port gig 1/2.[code] If I have read other posts correctly all points to the ASIC being overun by that traffic being sent from my WiSMs out to the Network.

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Cisco Switching/Routing :: Output Drops On CAT3750x With Multiple Ports

Jan 25, 2013

I've got a recurring them developing across several deployments of Catalyst 3750X series switches, I'm seeing large amount of output drops across multiple ports but there are is no QoS deployed on any of these switches. (standard FiFO). As it happens the ports in question are a member of EtherChannel groups which are connected to ESX Hosts.I've also seen this behaviour also unexplained on another 3750X at a different site, however it's a single port and connects to an Upstream firewall.However in both cases neither switch has any QoS or non-standard configuration, literally a couple of VLAN's and some EtherChannel groups.Here's some output from the case involving the ESX servers.

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Cisco Switching/Routing :: 1514 Gre Tunnel Output Drops Errors

Nov 17, 2012

I have seen an error in GRE configured between two routers over WAN.  i am monitoring the WAN link and GRe tunnel via WhatsupGold NMS and it reported that Gre tunnel having packet loss sometimes and this time it affects the services and traffic passing over tunnel.sh int t101 shows output drops . is that the problem ? i have read that i have to adjust MTC size but i tried to change the tunnel MTU to 1400 but still sh int t101 shows MTU as 1514 ? What could be the problem of output drops in my tunnel link. [code]

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Cisco Switching/Routing :: Catalyst 2960 - Total Output Drops?

Apr 25, 2012

I have a Catalyst Switch that is been used as a SAN switch providing ISCSI connection for servers.The total output drops of the interfaces connected to the SAN and some connected to the servers keep increasing.
 
Example below:
 
SWESAN1-1#sh interfaces gigabitEthernet 0/1
GigabitEthernet0/1 is up, line protocol is up (connected) Hardware is Gigabit Ethernet, address is ec44.763c.8f01 (bia ec44.763c.8f01)MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 5/255Encapsulation ARPA, loopback not setKeepalive set (10 sec)Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTXinput flow-control is off, output flow-control is unsupported ARP type: ARPA, ARP Timeout 04:00:00Last input never, output 00:00:08, output hang neverLast clearing of "show interface" counters 03:25:04Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 78Queueing strategy: fifoOutput queue: 0/40 (size/max)5 minute input rate 22322000 bits/sec, 2171 packets/sec5 minute output rate 5155000 bits/sec, 1487 packets/sec20441503 packets input, 23941254166 bytes, 0 no bufferReceived 0 broadcasts (0 multicasts)0 runts, 0 giants, 0 throttles0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored0 watchdog, 0 multicast, 0 pause input0 input packets with dribble condition detected16323602 packets output, 9608971046 bytes, 0 underruns0 output errors, 0 collisions, 0 interface resets0 babbles, 0 late collision, 0 deferred0 lost carrier, 0 no carrier, 0 PAUSE output0 output buffer failures, 0 output buffers swapped out 

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Cisco WAN :: 3750 - Unable To Find Resolution To Infrastructure And Getting Output Drops

Sep 28, 2011

Am not finding the resolution to my infrastucture and getting output drops. Sw1 is connected Sw2 as below stated
 
Please find the conf:
Sw 2 3750 conf:
 
interface GigabitEthernet1/0/46
 
no switchport
ip address 172.16.100.81 255.255.255.248(code )

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Cisco Switching/Routing :: Total Output Drops WS-C3750E-48TD-E

Feb 21, 2013

I have a problem with Total Output Drops, it's increase and decreases on WS-C3750E-48TD-E.
 
SWCIACTCT05#sh int gi1/0/47 | i  Total output drops:
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 6487344
SWCIACTCT05#sh int gi1/0/47 | i  Total output drops:
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 6487344
SWCIACTCT05#sh int gi1/0/47 | i  Total output drops:
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 6487344

[code]....
 
I checked and found two registered bug id: CSCtq86186 / CSCso81660.I would like to know what is the best IOS version to update my switch, IOS 15.0.2 SE2 or 12.2.58 SE2, by the way, my environment is very critical (data center) and the version 15.0.2 SE2 is very recent, but its stable ?In both versions the problem are fixed?

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Cisco Switching/Routing :: Output Drops With Interface Utilization 20% In Sw 2960-S

May 19, 2013

i noticed the "output drops" increasing in  interface gi 1/0/1 in my switch 2960-S although the utilization of my interface is between 20% and 50 %
 
SW__A#sh interfaces gigabitEthernet 1/0/1
GigabitEthernet1/0/1 is up, line protocol is up (connected)
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 93/255, rxload 3/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)

[code]....
 
what is the cause of this issue ?

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Cisco Switching/Routing :: WS-C3750X-48 - Output Drops On Gig Uplink To SonicWALL

Mar 5, 2012

I'm currently trying to diagnose a re-occuring problem with output drops on an uplink interface to a SonicWALL firewall, between 1am - 3am every night we receive alerts that the output drops (discards) counter has incremented.
 
This time frame happens to be when several network based backups are running so that's probably to blame for the added traffic count but I'm trying to narrow down what's actually dropping the traffic.
 
The switch hardware is a WS-C3750X-48 running C3750E-UNIVERSALK9-M , 12.2 (55) SE3.
 
My current thinking is that the output drops are indicative of congestion on the link to the SonicWALL indicating that the SonicWALL unit is incapable of processing the traffic flow fast enough thus causing the congestion and ultimately the output drops on the Gi2/0/48 interface.
 
According to SonicWALL the unit is rated at 1.5Gbps throughput without UTM services (pure stateful), and no UTM services are enabled.
 
I've posted a section of the show interface command:
 
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported

[Code].....

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Cisco Switching/Routing :: 2960G - High Total Output Drops?

Mar 27, 2012

Our database server is connected on cisco swich 2960G gigabitEthernet 0/38.while showing the interface command the total output drops is a large value..Is there any issue with this value.I think this is one of the reason for slow access of the server. 
 
cisco6#show interfaces gigabitEthernet 0/38
GigabitEthernet0/38 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 58bc.2746.45a6 (bia 58bc.2746.45a6)

[Code].....

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Cisco Switching/Routing :: Output Drops On Cat3750x Multiple Ports

Jul 4, 2012

I've got a recurring them developing across several deployments of Catalyst 3750X series switches, I'm seeing large amount of output drops accross multiple ports but there are is no QoS deployed on any of these switches. (standard FiFO).
 
As it happens the ports in question are a member of EtherChannel groups which are connected to ESX Hosts.I've also seen this behaviour also unexplained on another 3750X at a different site, however it's a single port and connects to an Upstream firewall.
 
However in both cases neither switch has any QoS or non-standard configuration, literally a couple of VLAN's and some EtherChannel groups.Here's some output from the case involving the ESX servers:
 
Port-channel6 is up, line protocol is up (connected)
Hardware is EtherChannel, address is 1cdf.0f82.1607 (bia 1cdf.0f82.1607)
Description: EC to xxxx
MTU 1500 bytes, BW 2000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)

[Code]...

How I can attempt to identify what traffic is being dropped?

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Cisco Switching/Routing :: Total Output Drops On Switch Port On 6509E

May 22, 2012

What is the cause of having a huge number ( 875349) of total output drops on one of my gigabit utp port  gi 2/12 which is connected to Cisco 1841 fa0/0 router by mean of cat5e cable.I did change the cable from cat5e to cat 6 and tried to increase hold queue to 4096 and to tweak wrr queue bandwidth

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Cisco Switching/Routing :: 3750 Interface Total Output Drops Incorrect

May 15, 2011

I am seeing Interface output drops that appera to be incorrect.  When I do "Show Interface gi1/0/20", I will get interface output drops of "4294961382".  But, when I do the same command again it shows "0" drops.  Is this a reporting error? I am ruinning c3750-ipservicesk9-mz.122-58.SE.bin on a 3750 stack with 2 switches in the stack. [code]

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Cisco Switching/Routing :: Catalyst 3750 Switch Interface Output Drops

Mar 13, 2013

One of my Catalyst 3750 switch have many out drops, I execute "sh mls qos int g2/0/3 statist" command, there are many output drops in queue3 threshold3. [code]

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Cisco Switching/Routing :: Large Number Of Queue Output Drops On 6509E

Apr 3, 2013

we have two 6509E, as our core switches. Recently I noticed that on some connections I have a high output queue drop rate.
 
These 4 x 2 interfaces (gigabit) are connected to our blade encolure, consisting of 4 x WS-CBS3120X-S. The utilization of the links is really quite low, when I see the increase of the drops. (~=60Mbps). All the links are fiber (SFP) and the distance between the core switches and the enclosure is about 15-20m.
 
I am not aware of any service degradation on the part of the servers. No CRCs, collisions etc, on the interfaces, apart from the drops.
 
The line card is a WS-X6748-SFP, but other interfaces don't seem to be experiencing any problems.

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Cisco Switching/Routing :: 2960G High Output Drops Only On Gigabit Switch

Feb 11, 2013

I just got a Cisco 2960G 24-port gigabit switch so that our HP servers can have a Gigabit connection to the network. I moved 2 servers to it (HP Proliant DL380's)  but they don't actually seem to be able to achieve even close to 1000Gbps. I ran same some LAN bandwidth tests and it was showing only around 200-300 Mbps between all of them. I also ran a network stress test utility, LAN Tornado, and it was showing packet loss as high as 60% when on gigabit, and only .07% when on 100Mbps.
 
-Both the NIC's and the switch ports are set to 1000/Full

-Currently using Cat5e cabling no more than 25Ft in length (I know Cat6 would be better but Cat5e is supposed to support Gigabit)

-All servers are on the same VLAN
 
Here are the port statistics when running just a stress test @ 10Mbps that had a 45% packet loss. What's odd though is when I set the servers and switches to 100Mbps, I get less than 1% packet loss.
 
GigabitEthernet1/0/16 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 203a.07ff.7e90 (bia 203a.07ff.7e90)
MTU 9000 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

[Code].....

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