i have an 2921 connected to an Catalyst 3560. My router interface shows quite a lot of input queue drops. Load is not too much max 5/255.
View 1 RepliesI feel that 3560 and 3750 perform differently with the following two commands:
srr-queue bandwidth shape 5 0 0 0
srr-queue bandwidth limit 50
On 3750, the bandwidth for queue 1 is limited to 100mbps x 50% / 5 = 10mbps
On 3560, the bandwidth for queue 1 is limited to the smaller value of BW / shape weight and BW x limit%.
Does it sound about right? is there a way to check for mls qos input queue drops? The show mls qos interface xxx stat only shows the output queue drops. Maybe for some reason the input queue never drops?
I can see drops on one of our busy L3 vlan in the input queue and are going up very frequently.System image file is "sup-bootflash:s72033-psv-mz.122-18.SXD3.binHardware = 6509
View 1 Replies View RelatedVlan interface would be dropping packets on the input queue? Refer to the drops/flushes below. This is from a 6500 with a Sup720, there are a number of vlans on it. This 6500 and it's HSRP partner are exhibiting the same symptoms on all the vlans I bothered to check. This particular vlan is quite lightly used, there are only about fifteen user PC's (each with 100 Mb interfaces) on it.
There is a bit of information on input queue drops on Cisco, but this is focused on physical interfaces where I can understand some packets being dropped. I would think that Vlan interfaces would have different issues.I note the "no buffer" errors as well, that also concerns me, especially as that counter is quite close to the "flushes".
Vlan123 is up, line protocol is up Hardware is EtherSVI, address is 00d0.04fd.6000 (bia 00d0.04fd.6000) Description: Vlan123 Internet address is 10.123.123.7/24 MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive not supported ARP type: ARPA, ARP Timeout 04:00:00
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We're having kind of a problem with our Catalyst 4507r switches. If we do a "show interface" command we're getting a lot of "Total output drops" on some of our interfaces. It seems to be most of the time on the same vlan.I was wondering if it has got something to do with QOS or queue selection As we don't have any QOS markings configured, is it possible that all traffic is using only one of the four tx queue's?
View 4 Replies View RelatedI've been fighting what seems to be an increased number of outqueue drops on our core stack and edge switches for the last 3 or 4 weeks.(The core consists of a stack of 5 3750s in 32-gig stack mode. The wkgrp switches are 3560s. all are at 12.2.52) The wkgrp switches are directly connected to users. We use Nortel IP phones with the phone inline with the user PC. auto-neg to 100/full. [code] However I have tried turning off QOS on a couple of workgroup switches (no mls qos, but left individual port configurations the same) but am still seeing drops.Since I have disabled qos on the switches in question (no mls qos) (not the core tho) I am presuming these commands have no affect on the switch operation and therefore cannot be related to the problem. With QOS turned off one would presume that it is general congestion - especially at the user edge where busy PC issues might contribute. So I wanted to see if I could see any instances of packets in the output queues building up.
I wrote some scripts and macros that essentially did a snapshot of 'show int' every 20 seconds or so, and looked for instances of 'Queue: x/' where x was greater than zero.What I found after several days of watching the core stack, and a few of the workgroup switches that are most often displaying the behavior, was that I NEVER saw ANY packets in output queues. I often saw packets in Input queues for VLAN1, once in a great while I would see packets on input queues for fa or Gi interfaces, but NEVER on output queues. [ code] Additionally, when I look (via snmp) at interface utilization on interfaces showing queue drops (both core and wkgroup), they are occurring at ridiculously low utilization levels (as low as 4 to 8%). I've tried to look for microbursts between the core and a wkgroup switch where the core interface was experiencing drops, but haven't seen any (using observer suite). [code] While the queue-drop counts aren't critically high at this point, they are happening more frequently than in the past and I would like to understand what is going on... In most cases, no error counters are incrementing for these interfaces. Is there some mechanism besides congestion that could cause output queue drops?
Our customer get the problem that the switch count the 5mins input/output rate of connected traffic interface always ZERO.The problem only occur in the module 3,4 and 5 interface, module 2 has no problems.
-------------------------------------------------------------------------------------------------
Catayst 4506E
12.2(52)SG
Chassis Type : WS-C4506-E
Power consumed by backplane : 0 Watts
Mod Ports Card Type Model Serial No.---+-----+--------------------------------------+------------------+-----------1 6 Sup 6-E 10GE (X2), 1000BaseX (SFP) WS-X45-SUP6-E 2 48 10/100/1000BaseT (RJ45) WS-X4548-GB-RJ45 3 48 10/100/1000BaseT (RJ45) WS-X4648-RJ45-E 4 48 10/100/1000BaseT (RJ45) WS-X4648-RJ45-E 5 48 10/100/1000BaseT (RJ45) WS-X4648-RJ45-E
[code]....+
i have issues logging into one of our core switches.its a 6509 switch but i cannot log in remotely.when i try to console in on the console port, i cannot log in instead i get the above error message.I haven't rebooted yet but would it solve the problem as this switch is a production switch.
View 6 Replies View RelatedOne 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]
View 8 Replies View RelatedI have a 2921 where I am shaping some traffic based on sub net on my lan. I have applied the shaping policy to the lan interface in the outgoing direction.
Topology is as follows:
ISP - ASA - ROUTER - LAN
Policy map:
Policy Map shape-lan
[code]....
I am seeing a lot of no-buffer drops on the policy and I am wondering what the best solution is to solve this:
Class-map: tc-class (match-any)
8730680 packets, 10803689863 bytes
5 minute offered rate 4453000 bps, drop rate 0 bps
[code]....
Should I just be increasing the queue-limit or should I be changing something else?
We currently have a site with a very simple topology that uses a 3750X switch stack for a collapsed core. Everyday, the users have a conference call and experience poor voice quality.Its not bad when users call from several conference phones, but when everyone calls in on individual phones, there is choppy and almost inaudible voice quality experienced. The voice traffic flow would be as follows: Phone <-> 3750 switch <-> Voice GW We have packet captures showing that RTP packet loss is occuring from the phone to the voice gateway, but none from the voice gateway to the phones. We also have drops in the output queues that match drops on the asics. I can reset the counters and they will be clear until the call, and then they increment significantly during the call. The voice gateway and phones are non-Cisco. The switch stack has 6 switches. We are trusting the DSCP settings on the phones. All the queue drops from the phones are usually in queues 0-3, but all drops on the voice gateway is in queue 0. Below are the QoS settings; they are mostly default and we have not changed any queuing, thresholds, or buffers. Should we specify larger buffers and threshold for a designated queue and send EF traffic to that queue?
MySwitch#sh mls qos
QoS is enabled
QoS ip packet dscp rewrite is disabled
Typical Port
GigabitEthernet1/0/4
trust state: trust dscp
[code].....
We're having some issues with a 3560 CPE. It's uplink is a GE fiber link, customer port is FE RJ45. We see a lot of TX-frames being dropped at the FE port,but none at the GE port. Even when the customer is only at ~50Mbit/s downstream traffic. When customer sending ~50Mbit/s upstream, there are no TX- drops at the GE link. Is this a normal behaviour? From what I know the physical medium shouldn't have any inpact on this since drops occurs in the port- asic, and not in physical transmission.Do the buffer-sizes between GE and FE differ? What could we do to optimize the flow and reduce drops? QoS is set to off and no modifications on the queues have been made on the interfaces.
View 8 Replies View RelatedI 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]
View 7 Replies View Relatedwe 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.
i have a 3560 connecting to a sp with limited bandwidth. i have one interface on the switch whose traffic i do not want to drop. i want this traffic to go into the high priority queue. i am not sure how this should be configured, but here is my best guess and my current qos configuration on the switch:
qos map cos-dscp 0 8 16 26 32 46 48 56
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 1 4 6 7
mls qos srr-queue output cos-map queue 2 threshold 2 3(code)
since cos 5 is mapped to dscp 46 then this traffic would go into the priority queue. is this correct ?
What does RP drops entail? We are experiencing 0.23 % drops on an vlan int on one of our 6500. This interface is an L3 to a server-subnet. Doing a sh int vlan 238 switching shows 30935411 RP (Route Processing) drops.It was a bit unclear to me in the thread "Input queue drops on 6500 vlan interface" if RP drops was through the router, or to the router(mgmnt)?I can do a netdr to see what traffic goes to it. It should not generate CPU load, but I think I will wait until after hours before I try that command.
- do NETDR:
-- debug netdr cap rx vlan 238
-- show netdr cap
I have a connection that is loosing packets, my show interface output below summarises the interface where i believe the problem is occuring. My Hardware is 6509 running 12.2
View 1 Replies View RelatedI have an issue with input errors, overruns, and input reset drops on the inside interface of an 5580-40 (v8.2.5: Transparent mode) The box is not stressed at all according to the 'show' commands in the Cisco troubleshooting performance document for PIX/ASA v8.2.5. Nothing stands out because is pretty much normal, nothing (processes, RAM, blocks, IO...) really being highly utilized. I have replaced the 10Gig card and that seemed to work because the rate of errors has gone down tremedously. The next step is to RMA the whole box.My question is what would be the cause of the inside interface to stop processing traffic (I say that because the syslog server stops receiving messages) for some periods of 30 seconds periodically throughout the day and clients lose their connections (ie Outlook, IBM Sametime, Oracle, MSSQL..etc). Can the issue be somewhere related to the overruns and input errors?
View 2 Replies View RelatedWe are facing since one month in our two Cisco WS-C3750G-12S on many interfaces input errors when data transer or ping (ICMP) increase input erros. Not only port 1 but many interface has same issue, i have change new IOS but still same issue, once i have erase startup config but same issue we are facing and finaly i have replace same new switch with the same IOS it's working fine.(c3750-ipservicesk9-mz.122-55.SE4.bin) [code]
View 11 Replies View RelatedI have a CISCO2921. I am not able to bring up its gi0/1 interface. It stays down down.
[URL]
I know that interface is not coming up because of "no media" below. Router#sh int gi0/1 | i media Auto Duplex, Auto Speed, media type is no media
I have tried media rj-45 and media sfp which have also not worked. The other end of this link is ethernet handoff. What is it that I have to do for the link to come up? If I change the connection to gi0/2, I think that will work because I see this for gi0/2:
Router#sh int gi0/2 | i media Auto Duplex, Auto Speed, media type is RJ45
An interface on 2921 router is not coming up. When I shut/no shut the interface, I see this:
Router#sh log | i 0/2
Oct 17 08:55:06: %IP_VFR-7-FEATURE_DISABLE_IN: VFR(in) is manually disabled through CLI; VFR support for features that have internally enabled, will be made available only when VFR is enabled manually on interface GigabitEthernet0/2
Oct 17 09:00:35: %LINK-3-UPDOWN: Interface GigabitEthernet0/2, changed state to down
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I have been making effort to solve frequent input errors of module interface(WS-X4548-GB-RJ45) in our Backbone Switch(Cat4506).Let me show you show interface information.Rx-No-pkt-buff value is increased continuously even though traffic rate of interfaces is lower than 20Mbps.We have two Backbone Switch which is operated by HA via HSRP.What bring buffer shortage to our network ? [code]
View 2 Replies View RelatedWe have a IP-phone system connected to port 1 on a 3560 switch, the phone system tags traffic with dscp. The switch uplink is on port 24.
Is this configuration correct:
interface 1:
auto qos trust
interface 24:
priority-queue out
Does the Catalyst 3560 support GRE ?
I know that Catalyst 3750X support GRE ,but Catalyst 3750X cannot work in hardware it.
Does the Catalyst 3560 cannot work in hardware too?
I'm currently configuring per port policing on a 3560 and want to limit inbound traffic to 750mbit:
mls qos
access-list 1 permit any
class SET_IF
match access-group 1
policy-map SET_QOS
class SET_IF
[code].....
When I test the setup with iperf I always get different results when I change the nummber of parallel connections.Isn't there a way to limit the throughput regardless of the number of conns (INGRESS!) like with srr-queue bandwith limit?
We have observed increase of CPU utilization of 50% after upgrade from 15.0(1)SE3 to 15.0(2).The SDM template is "desktop default" template.The increase of CPU utilization in Switches with LAN Base after upgrade is about 10%.
How to find the cause for the 50% increase ?This is command is the output of 15.0(2). The calculated sum for 5min process-utilization is 21% plus 1% interrupt is 22 %. Where is the rest ?
switch#sh proc cpu sorted 5min | exc 0.00
CPU utilization for five seconds: 30%/1%; one minute: 29%; five minutes: 28%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
169 135084171 33273787 4059 9.92% 8.94% 8.73% 0 Hulc LED Process
83 80075989 13546109 5911 5.60% 5.39% 5.38% 0 RedEarth Tx Mana
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I'm having an issue with 2 of my 3560s which are not booting. The last thing I did on both switches before it hangs was:
>write erase
>reload
restarted as normal
[Code]....
I've tried powering-off the switch and pressing the Mode button and power on. I got to swtch: mode switch:reset
It restarted past the POST but just hang halfway at the same bootp-up process as shown on the attached. The SYST LED is Green color when it hangs.
We have two catalyst 3560 switches running c3560-ipbasek9-mz.122-58.SE2.bin They are connected using etherchannel using gi 0/21 - 24 interfaces.
on 3560-1 switch, there isn't any ip-default gateway or ip route configured. It only have 1 interface vlan configured.
on 3560-2 switch, there is ip default gateway configured along with 1 interface vlan.
What i dont understand here is that, i can reach out to other subnets from 3560-1 switch in which the routing is not enabled?
I have a 2504 WLC connected to a Catalyst 3560 which has multiple vlans and is connected to a 2800 series router. I know the catalyst is L3 but I am needing nat functions to get outside to the internet. From my 2800 series router I am able to ping out to the internet, also I am able to ping the vlan interfaces on the catalyst switch. Problem is from the catalyst switch I can ping the inside and outside address of the 2800 but I cannot get any further then that. I cannot ping the 2800 router gateway. Not sure what I am doing wrong as far as routing.
I've attached my 2800 and 3560 configs.
Cisco C2960S IOS:12.2(55)SE5
Cisco C3560X IOS: 12.2(55)SE3
The 3560 switch is serving as an access and distribution layer switch. End devices are connected to it and it also implements IP routing via SVI and L3 ports.Auto qos voice cisco-phone has been implemented on applicable access layer ports. SRND4 is being used.
2960:
mls qos map policed-dscp 0 10 18 24 46 to 8
mls qos map cos-dscp 0 8 16 24 32 46 48 56
mls qos srr-queue output cos-map queue 1 threshold 3 4 5
mls qos srr-queue output cos-map queue 2 threshold 1 2
mls qos srr-queue output cos-map queue 2 threshold 2 3
mls qos srr-queue output cos-map queue 2 threshold 3 6 7
[code].....
Question 1:Why is the auto qos generated policed-dscp map different on these two switches?The Cisco Smart Business Architecture LAN configuration files guide [URL] does not specifically use the 3560 in their examples, they use the 3750 but it's my assumption that the same techniques, configs apply with regard to my specific feature questions. When using a 3750 in the Access layer, the guide shows (page 15) the same auto qos generated policed-dscp map configuration that is on my 2960. The SBA LAN config guide shows that when using a 3750 as a Distribution layer switch (page 26), the policed-dscp map configuration is the same that I see on my 3560.In the configuration guide for the 3750 distro switch, there is no auto qos applied as there are no access ports, so the mls qos commands are manually input. Since my 3560 does have access ports, auto qos generated the mls qos commands, and the results are the same be it following the guide and manually entering (per distro switch guidelines) or using auto qos. This leads to question 2...
Question 2:Why is the mls qos map policed-dscp configuration different depending on use as an access vs. distribution switch?
Question 3: On the 3560, access ports that have "auto qos voice cisco-phone" applied are put into queue-set 2 (output). Queue-set 2 (output) uses default values (not configured). Is this correct and desirable? If so, why? The 2960 has all ports in queue-set 1, regardless of being an access device port or a trunk port connected to the 3560 (as per the SBA LAN config guide EgressQOS macro commands). The 3560 trunk ports are all also configured to use queue-set 1 (output), again as per the SBA LAN config guide EgressQOS marco commands.
It is possible to configure the IOS NetFlow 122-58.SE2 in a Catalyst 3560?
View 5 Replies View RelatedI have one specific trouble with Catalyst 3560CG switch and Stardom reserved industrial controller. Controller has 2 processors, one of them after(!) negotiation become main with IP 192.168.1.1, other one stays in reserve with IP 192.168.1.129. If main one shuts down, spare one becomes main with IP 192.168.1.1. This perfectly works with DLINK and MOXA level 2 switches, but fails with Catalyst 3560, because spare one cannot even connect to switch port. I don't know the exact reason of it, but i suspect, that it happens because of before negotiation both controllers have ip 192.168.1.1 (i know, that it is wrong and weird, but so it goes). First of them correctly connects to switch port, which goes up and passes pings. Second processor tries to connect to switch port, which goes several times up and very soon down, then processor lefts his tries to connect to anybody and become idle. The switch seems to some way check IPs of 1-st and 2-nd port packets, and shuts down 2-nd port. I have connected via hyperterminal and tried to disable some level 3 functions and checks of the switch, but this wasn't useful. how exactly(or at least approximately) should i configure a switch to make this bundle work?
View 1 Replies View RelatedI've just installed 2 of these in my workplace on a PLC network.I'm now looking to set one of the ports up as my diagnostic port and would like to be able to mirror any of the other ports to this port.I believe it is called SPAN on Cisco switches.The only reference I can find to it is configuring via Telnet which I haven't got a clue about.On my old Wiedmuller switches it was just a few clicks away.
View 3 Replies View Related