Cisco Switching/Routing :: C2960S How To Calculate Buffer Allocation Needed
Jan 2, 2011I need to configure these qos settings in a C2960S. [code]How I calculate the buffer allocation needed? [code]
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Cisco Switching/Routing :: Port Allocation In Nexus 7000
Mar 4, 2013I have one cisco Nexus 7000 with version 6.1(2).I created 3 VDC
ADMINCOREsecurity
I have configured 1 - 45 ports for Core and 46 - 48 ports for Security.Now I am not using the VDC Security and I tried to move the assigned ports 46 - 48 from Security to ADMIN.Switch accepted the command .But the ports are not visible on ADMIN VDC.Now it is not showing on Security VDC also. I need this ports in ADMIN VDC
Cisco Switching/Routing :: 3560 TX-queue Buffer Sizes
May 29, 2013We'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 RelatedCisco Switching/Routing :: Catalyst 2960S Port-Based Address Allocation?
Sep 27, 2012I just bought a Catalyst 2960S to test out the feature "Port-Based Address Allocation" which is required for our factory. I followed the instruction from Cisco IOS and did all the steps but I could not get it to work, my network client did not received the expected IP address that I configured.
View 8 Replies View RelatedCisco Switching/Routing :: 2960 - Discards And No Buffer On Trunk Ports
Oct 17, 2012I have been experiencing discards and no buffers errors on my 2950 switches. These switches are connected to two core switches 4948 and 3560G. I have noticed previous posts regrading these problems but have been unable to find any cases that were resolved. We are using 12.1(22)EA11 software on our 2950 switches.
Outputs:
flrnet3#SH controllers ethernet-controller gigabitEthernet 0/2
Transmit Receive 22204993 Bytes 904542488 Bytes
[Code]....
Cisco Switching/Routing :: 2691 Router Buffer Leak Due To Syslog?
Dec 3, 2011On my 2691 Router i see the buffer leak due to syslog
2691Router# sh buffers leak
Header DataArea Pool Size Link Enc Flags Input Output User
650743C4 F200084 Small 0 0 0 0 None None Init
[Code].....
Cisco Switching/Routing :: C2960S - 12.2(58)SE Crash On SSH
Apr 13, 2011I just upgraded several of my C2960S-48FPD-L from 12.2(55)SE to 12.2(58)SE and now almost every time I try to SSH to it the switch reboots and gives me these trace backs ...
07:58:52 CST Thu Apr 14 2011: Unexpected exception to CPU vector 200, PC = 1EADA28
-Trace back= 0x1EADA28z 0x1CDC324z 0x1EA5520z 0x1CDC35Cz 0x1CDD0E0z 0x1CDF0C4z 0x1CE06CCz 0x1CE07F8z 0x1D67348z 0x1D611BCz
Writing crash info to flash:/crashinfo_ext/crashinfo_ext_3
07:58:56 CST Thu Apr 14 2011: Unexpected exception to CPU vector 1100, PC = 121BB98
-Trace back= 0x121BB98z 0x12250FCz 0xFA7540z 0xA807B8z 0xA75DF4z 0xA78080z 0x94B708z 0x9717C0z 0x918DD8z 0x936520z 0x9344BCz 0x9345FCz 0x93484Cz 0x1D67348z 0x1D611BCz
=== Flushing messages (07:58:56 CST Thu Apr 14 2011) ===
Buffered messages: (last 4096 bytes only)
0x00000005 R6 = 0x01224F44 R7 = 0x02A23C6C
000089: *Feb 28 18:03:13.577 CST: %PLATFORM-1-CRASHED: R8 = 0x00000080 R9 = 0x00000000 R10 = 0x00000000 R11 = 0x00000071
000090: *Feb 28 18:03:13.577 CST: %PLATFORM-1-CRASHED: R12 = 0x00034855 R13 = 0x00000280 R14 = 0x01CE0778 R15 = 0x00000000
000091: *Feb 28 18:03:13.577 CST: %PLATFORM-1-CRASHED: R16 = 0x00000000 R17 = 0x00000000 R18 = 0x00000000 R19 = 0x00000000
[ code]....
Cisco Switching/Routing :: WS-C2960S Inter VLAN Routing
Dec 9, 2012I am looking for a reasonable switch but it has do do inter-VLAN Routing. I know I could go with a 3560/3750 with IP Services but I am also thinking the 2960S with IP Base IOS might do?
I have looked up the IP Base IOS and it does list IP Routing but how to actually configure inter-VLAN Routing on a 2960S with IP Base?
Cisco Switching/Routing :: 2960 - DHCP Server Port-Based Address Allocation
Nov 15, 2012Does the 2960 switches with LAN-Lite support DHCP Server Port-Based Address Allocation?
View 1 Replies View RelatedCisco Switching/Routing :: 2960S - Default Queue / Buffer Settings When MLS QoS NOT Enabled
Feb 13, 2013I have a customer that is seeing output drops on a 2960S with mls qos not enabled. It appears that they are getting bursts traffic on the switch that is filling up the buffers, hence causing the drops. I have a couple of questions:
1. What are the default queue/buffer settings when mls qos is NOT enabled on the switch.
2. Is there any good documentation out there regarding the buffer sizes of the different switch models
The customer is looking for an answer as to whether or not replacing the 2960S with a higher model would eliminate the output drops WITHOUT having to mess with QOS/buffer/drop threshold settings on the switch, and Cisco doesn't seem to make the buffer sizes readily available for the the smaller Catalyst switches.
Cisco Switching/Routing :: Enable L3 Routing On C2960S
Apr 19, 2013I have been trying to enable L3 intervlan routing on C2960S Switch with ip routing command and that was the output from the Switch: [code]
View 6 Replies View RelatedCisco Switching/Routing :: Power Stacking For 3750x - Both Cables Needed?
Jun 7, 2012Suppose I have a 3 member stack of 3750x switches. Members a, b and c.I have all 3 members stacked with all 3 *data* stacking cables in a daisy-chain topology. The 50 cm data stacking cable from switch a (on the very top) to switch c (on the very bottom) just barely reached.Of course, that means the 30 cm *power* stacking cable didn't reach between a & c. Right now, the power stacking cable goes from a to b, and then another cable from b to c. Leaving me with a useless extra 30 cm power stacking cable.
My question is, can switch "a" receive power from switch "c" through switch "b"? Is this just a big electrical "bus"? What if the power supply in switch "b" is removed?Just wondering if there is a need for me to get a longer power stacking cable (one of the 150 cm power stacking cables).
Cisco Switching/Routing :: Independent Opinions Needed On Network 4507
Feb 15, 2012Our sister site had a new building and the network it was supposed to resemble the network on this site with link redundancy as far as the edge switches.After 6 months asking for the password to the equipment I finaly got it and started to plan the deployment of some phones, I got a little confused as to the layout of what had been done as CDP was not showing what I had expected.
I then used CNA to map out the site.We have 1 main server room (at the top of the picture with the two 4507 cores and a number of fixed config 1U switches)And 3 further wiring rooms at other points in the building with fixed config 1U switches.
(And a wan link to this site)In my opinion the design as it stands is significantly flawed in redundacny with multiple points of failure, and its efficiency is very poor.
Cisco Switching/Routing :: C2960S Flexstack Serial Number
Mar 21, 2012Is there a CLI-command to see the serial number of the flexstack module installed in a C2960S.
View 13 Replies View RelatedCisco Switching/Routing :: Recommended IOS For Switch C2960S And C3750
Jun 13, 2013We have several of these WS-C2960S-24PS-L running 12.2(55)SE5 C2960S-universalK9-M and need to upgrade to a better.IOS since we have a sitution where CPU would get to 100% but we have only a few ports connected.Also we have several of WS-C3750-48P running 12.2(55) SE6 C3750-IPBASEK9-M.
View 3 Replies View RelatedCisco Switching/Routing :: 2960 Stack Of Four Ws C2960S Crashes
May 29, 2011We have a 2960 stack of 4 WS-C2960S-24PS-L switches.Sometimes, at random, the stack crashes and reboots. I have downloaded the crashinfo file and can see the following error.
View 7 Replies View RelatedCisco Switching/Routing :: WS-C2960S-48FPS-L Stack Port Down?
Mar 14, 2013I'm trying to configure a stack between two WS-C2960S-48FPS-L but does not working.The switch port is always Down.I tried to change de module and cables.I tried to make a loop in one of two switches and the ports always down.
IOS: 12.2(55)SE5
#show switch stack-ports
Switch # Port 1 Port 2
-------- ------ ------
1 Down Down
Cisco Switching/Routing :: WS-C2960S-24TS-L / Mac Flapping On Stack?
Feb 27, 2012We have two switches WS-C2960S-24TS-L running in stack with running IOS c2960s-universalk9-mz.122-55.SE3.We have connected two checkpoint devices on Gi1/0/24 and Gi2/0/24 with a simple configuration:
interface range GigabitEthernet1/0/24, gi2/0/24
switchport access vlan x
switchport mode access
spanning-tree portfast
On the devices log we get the following message:
%SW_MATM-4-MACFLAP_NOTIF: Host 0000.0000.fe21 in vlan x is flapping between port Gi2/0/24 and port Gi1/0/24
The mac-address 0000.0000.fe21 is not found on any checkpoint interface. "Show mac-address int gi1/0/24 or gi2/0/24" does not show the correct mac-address of the checkpoint interface connected to the port, but instead shows 0000.0000.fe21.Is there a bug in the IOS, something wrong with the switch config or does it have something to do with the checkpoint config?
Cisco Switching/Routing :: Stack C2960S High CPU Version 12.2(58)SE2
Jan 14, 2013I have a customer with a stack of two switches C2960S-24TS-L that are running 12.2(58)SE2 universal K9, we see that the CPU load increase over time, to 95% and stays there reload solves the problem.the process that akes a lot of CPU is also the SNMP ENGINE, I see that it is running 30 minutes on 95% and then 10 minutes on 35%, this is the only stack were we see this problem. Is there also a SNMP bug in this version ?
View 1 Replies View RelatedCisco Switching/Routing :: GLC-GE-100FX Supported On WS-C2960S-24TD-L?
May 10, 2013Does GLC-GE-100FX is supported on the WS-C2960S-24TD-L. I don't see this switch listed under the compatibility matrix.URL
But the datasheet for the 2960S says this:
"The Cisco Catalyst 2960-S with SFP+ does not support the GLC-FE-100BX, GLC-FE-100FX, or GLC-FE-100LX." But it provides no reference for the GLC-GE-100FX The easy answer is, no the 2960S-24TD doesn't support it, any clarification if possible.
Cisco Switching/Routing :: Configure Connection Between UCS FI 6120 To C2960S?
Mar 29, 2012is it possible to connect UCS FI directly to C2960S using Twin Ax Cable (3M long) ?
View 2 Replies View RelatedCisco Switching/Routing :: Adding Dhcp Option 82 On C2960S
Dec 12, 2012I have a very simple setup containing 3 C2960S switches:switch 1: central switch, acting as router between VLAN 1 en VLAN 2switch 2+3: edge switches, connected via 1 link to central switch, both on VLAN 2,Clients connect to switch 2 and 3 using dhcp, switch 1 uses dhcp relay to forward requests from VLAN 2 to the dhcp server on VLAN 1. So far so good.Now I want switch 1 to add option 82 to the dhcp requests so the dhcp server can see whether the request came through switch 2 or switch 3. I tried turning on dhcp option 82 support on switch 1 by doing.
View 2 Replies View RelatedCisco Switching/Routing :: WS-C2960S-24PD-L Support 1 Gig Uplinks With SFP?
Apr 1, 2012WS-C2960S-24PD-LCatalyst 2960S 24 GigE PoE 370W, 2 x 10G SFP+ LAN Base
Can I use the above said switch for 1 Gig Uplinks using SFP.
Cisco Switching/Routing :: WS-C2960S-48FPS-L / Pinount Poe (802.3af) And Poe+ (802.3at) For Switch?
Feb 12, 2012The pinout of poe and poe+ (802.3af) and (803.3at) of these models of Cisco switches?
WS-C2960S-48FPS-L 48 Ethernet 10/100/1000 PoE+ ports; 740W PoE capacityWS-C2960S-48LPS-L 48 Ethernet 10/100/1000 PoE+ ports; 370W PoE capacityWS-C3750-48PS-S 48 Ethernet 10/100 ports with IEEE 802.3af and Cisco prestandard Power
Pin goes where the power for Poe (802.3af) and poe+ (802.3at) for this model Cisco
Cisco Switching/Routing :: WS-C2960S-24PS-L Floods Network
Jan 21, 2013I have three new 2960 switches as listed in the title. I configured them as follows:
192.168.1.215 host: whse-c
192.168.1.216 host: whse-b
192.168.1.217 host: whse-a
Switches B and C flow into A before continuing on into the server room switch (distance issues).All three switches are configured for ports 21-24 at 1000 and set as cisco switches. all other ports are undefined as they have a myriad of desktops, printers and non cisco access points flowing into them. side question - should i configure them as access points where applicable even if they are non cisco? I am replacing three netgear switches that currently are in place and have no known issues other than they are old and the fans may fail soon.hooked up .217. was able to get to it from the network. Hooked up 215 and then 216. All the sudden I lost the ability to tap into the switches, any of them. (I think I had done 215 at that point too, before adding 216. I found out later it took the network to its knees as internet was lost, and the MPLS stopped functioning.
I undid the changes and put the netgears back in service and all was right with the world again. At first I thought it was a bad host name as I had used whse-a on switch C in error. I changed that after this issue.Later that day I put 215 in place. checked it from the network and could get to it just fine. Then I put 216 in service. I lost connection to 215. I could no longer get to the internet from my pc and the MPLS went down again. This time I just unhooked 216. 215 is still in place and working on the network at the moment and not causing issues. (btw these switches are not even in my path from my pc to the internet, just on the same network) tomorrow I am going to try 217 again while 215 is still on the network and see if there are any issues adding that swtich. if I can do so, and there are no problems, is this an indication of a faulty switch? what further testing can I do, have I missed something in setup? If this brings the network down again, why cant i add two of these switches to each other/on the same network path (B and C were not even connected to each other yesterday evening when it went down again).
Cisco Switching/Routing :: WS-C2960S-48FPS-L - Switches Comparison
Dec 18, 2012I was looking at WS-C2960S-48FPS-L (740 Watts) and WS-C2960S-48LPS-L (340 Watts) models today, I'm not sure that I understand it right,
Does WS-C2960S-48FPS-L model support all 48 ports POE+ (30Watts)? Does that mean each port will get 30 Watts on this switch?
Does model WS-C2960S-48LPS-L support 24 ports with POE and 24 ports with POE+?.
Cisco Switching/Routing :: How Many Switches Can Be Stacked With WS-C2960S-48FPD-L At A Max
May 28, 2012How many Switches can be stacked with WS-C2960S-48FPD-L at a max..
As per my Knowledge it is 4 and as below..
Switch 1 to Switch 2
Switch 2 to Switch 3
Switch 3 to Switch 4
Switch 4 to Switch 1
If yes then, is it mandatory to do the "Switch 4 to Switch 1" stack. why am I asking this is because this stack requires a long cable and the cable which comes with the Switch is only 0.5M.
Cisco Switching/Routing :: WS-C2960S-24TS-L / 4 SFP Ports For A Switch?
Jul 24, 2012I have a got a requirement where a 24 Port Switch should have 4 SFP's and all 4 should be used at a time, So I've chosen " WS-C2960S-24TS-L"
The transeiver should be GLC-LH-SM, so kindly let me no whether I would be able to use all 4 ports at a time or not.
Cisco Switching/Routing :: 2955 Explanation Needed For FCS Error Hysteresis Threshold
Feb 5, 2012One of my clients is using Cisco catalyst 2955 industrial switch.I am doing the configuration for them and come across one setting of FCS Error Hysterasis Threshold. I know FCS is Frame Check Sequence.
I do not understand is what is the meaning the setting of Hysteresis in term of percentage stand for what purpose?For example, the default is 10 percent. If I set the value to be lower 5% and what is the impact on that? Is this more stringent than default of 10% or less stringent than default of 10%?
Cisco Switching/Routing :: C3550 Is DHCP Snooping Needed For Port Sec To Work
Oct 8, 2012i have a strange problem in my campus network.im trying to run port security on my access switches which they are 3550 with ios c3550-ipservicesk9-mz.122-52.SE when i run the port security with Sticky option, even i put 1000 mac address for just learning on the port but when i issue the switchport port-security command every pc connected to that port loses its connection with network UNTIL i enable dhcp snooping!!! all my client are getting they ip address from DHCP server but strange thing is that how on earth i have to enable DHCP snooping to port security work properly? also when i check the configuration under the interface when dhcp snooping is not yet enabled switch doesnt add any mac address under the interface so no one can work until i enable snooping and then switch adds mac addresses under the interface configuration.is this Bug on this version of IOS?[code]
View 4 Replies View RelatedCisco Switching/Routing :: WS-C2960S-24PD-L PoE+ 10Gb Switch Using 1Gb Uplink
Jan 24, 2013I have configured about 20 of these switches now, and notice in the port listings a TE1/1//1 TE1/1/2 and GI1/1/1 GI1/1/2 uplink port. There are only two uplink SFP+ ports. I now have a reason to install with a 1Gb uplink to the Core. I am using a GLC-LH module at each end. I did configure the TE1/1/1 port for the uplink. Does not work though..Do I need to configure the two GI1/1/1 and 1/1/2 ports for uplink, remove the TE configuration for the uplink to work? Using the UNIVERSAL code with a LANBase license.
View 2 Replies View RelatedCisco Switching/Routing :: Configuring DHCP Server On WS-C2960S-24PS-L
Jun 5, 2013I receive a question from a future customer about this future if its supported on " WS-C2960S-24PS-L":configuring 2 dhcp server on this swith ( 1 dhcp for voice vlan , and 1 for Data Vlan).I did some search , but i didnt find the answer .i have to advice a customer before ordering the switch.
View 2 Replies View RelatedCisco Switching/Routing :: Running-configuration On Stacked Switches (C2960S)?
Apr 2, 2012My company is beginning to have a lot of sites were we are stacking 3 to 4 C2960S-48 switche.This is making "show running-config" very very long because of the 4 x 48 interfaces.I can’t find a CLI command that show me the running-config of a ranges of interfaces. If I for example would like to see running-config for switch 3 (interfaces 3/0/1-52)The Show Running-config will show all the interfaces (for the two first swtiche = 104 interfaces), which take a time before I reach to switch 3.I miss a CLI command like: show Running-config switch 3, or module 3, or show running-config interface range x/x/x-x ?I’m well aware of the CLI command show running-config interface x/x/x, but this will only show me one interface.
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