Cisco Switching/Routing :: 3750x Command Cts Dot1x Kills The Connection

Dec 6, 2012

We're having an issue with the command "cts dot1x" when applied to an uplink interface.It basically kils the connection with this command is applied.  Once you remove it, everything is back to normal, the platform is a cisco 3750x.

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Cisco Switching/Routing :: 3750x - Command Cts Dot1x When Applied To An Up-link Interface

May 7, 2012

we're having an issue with the command "cts dot1x" when applied to an uplink interface.  It basically kils the connection with this command is applied.  Once you remove it, everything is back to normal, the platform is a cisco 3750x.

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Cisco Switching/Routing :: 3750X And 10 Gb Copper Connection

Sep 3, 2012

We need to deploy a 3750X switch with 10 Gb module. The pb is what SFP to choose ? The 10 Gb ports will be attached to an ethernet 10 Gb RJ-45 Server port. The 10 Gb connection has to be copper (not fiber). Is this reference ok : SFP-H10GB-CU3M= (version 2) ?  I mean is it a copper cable with an attached SFP.

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Cisco Switching/Routing :: Dot1x Authentication On 3750?

Oct 6, 2009

I configured dot1x port-authentication on a 3750. The switch sends out a request to the radius server. The radius server sends a answer-packet to the switch udp port 21645 but it seems the switch discards the packet or something like that. The radius server gets the answer "Destination unreachable, Port Unreachable"

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Cisco Switching/Routing :: Dot1x Authentication Not Working On 2950

Mar 14, 2011

I have issue with 2950 switch dot1x config is not working , but on 2960 its working fine .Below are the configs from both switches and a debug dot1x all snap, what may be the issue with 2950 switch ...
 
on 2950======>
aaa new-modelaaa authentication dot1x default group radiusaaa authorization network default group radius

[Code].....

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Cisco Switching/Routing :: 3750x Management Port - No Connection In Switch Mode

Jun 19, 2012

I'm trying to get an IP_ADDR set on the management port in SWITCH: mode but for some reason the port seems disabled. PC shows connection unplugged. MGMT_INIT is not a valid command (not listed under '?' ). Bootloader version is 12.2(53R)SE2 FC1.

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Cisco Switching/Routing :: 2960 - Dot1x Authentication Session Id Not Clearing

Nov 2, 2011

I am seeing the following behavior when computers move from one switch to another with dot1x ONLY when there is a 'stupid' switch in between.
 
computer --------  'stupid' switch ------- 2960
 
dot1x is working fine but when the computer is disconnected, the port still shows the authentication session id so when the computer connects to another port or switch, authentication succeeds but traffic doesn't pass. While I'm almost certain that the culprit is the 'stupid' switch that doesn't clear the session id, I have already tried another one and the problem remains so I'm actually just asking for a confirmation that all these 'stupid' switches present this behavior and if there is a workaround in this case.

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Cisco Switching/Routing :: Command To Show Physical Connection In 3660

Jun 19, 2012

I am using cisco c3660 to act as Terminal Server for the communication of production machines in my company, recently there is a communication lost issue happen and its due to physical cable unplug from the machine. to troubleshoot for this issues i have to physically go inside my production area to check on it,  as i understand from vendor we can check on the physical machine to see whether the LED light on the module is green or not, but in case of need to troubleshoot at night time, its time consuming as i need to travel back to company. is there any command that i can issue in the router c3660 to check on the physical connection between c3660 router and the production machine? the IOS version is IOS (tm) 3600 Software (C3660-I-M), Version 12.1(4)

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Cisco Switching/Routing :: 6509 - 802.1x And Voice VLAN / Enable Dot1x On User's Ports On The Switch

Sep 17, 2012

I have a Cisco 6509 with IOS "s222-ipservicesk9_wan-mz.122-18.SXF16.bin"I need to enable dot1x on user's ports on the switch. each user is connected to the switch through the IP phone.
 
I just found out that I can not enabled dot1x on trunk port. I have tried to use "switchport voice vlan " but I got:
 
Switch(config-if)#switchport voice vlan 123
Command rejected: Gi7/20 is Dot1x enabled port.
 
let me know what should I do to get dot1x working?
 
Note: I have connected a laptop directly to the port and dot1x is working fine.

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Linksys Wireless Router :: E1000 - Watch HULU Through Player It Kills Entire Internet Connection?

Dec 17, 2011

I have the E1000 Linksys Router and I am using a network cable to connect to my Sony Blu-ray BDP-S370. When I watch HULU through the player it kills the entire internet connection for all PCs. I have to unplug the router in order to restart it. Everything will also work just fine until the next crash.Here's the thing, I'll watch a bit of the show and see the commercials and the router will only crash when it comes back to the show. If I watched 100 commercials they would not crash, but as soon as it returns to the show CRASH. Restart and we watch again.

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Cisco Switching/Routing :: Access Layer Switching With 2960 / 3560x / 3750x And 4506

Jan 17, 2013

My management has tasked me to give them a high level overview of the different switching we can choose for our new building.
 
This is what I know so far.4 Closets, each closet has 450 ports,One MDF room that is will contain one UCS Chassis and a Nimble iSCSI SAN.
 
I am working on the spreadsheet and it looks like this (Not totally filled):

2960s3560x3750x45064510Approx cost (Each, 48PORT, POE+, 10G uplink, Dual PS, IP BASE)
6K7K8K45K75KMax Capacity192432432192384Backplane speed206464520520ProLeast ExpensiveStackable to 9Stackable to 9ProDual PSDual PSDual PSDual PSDual PSProLayer 3 opt
Layer 3 optDual SupsDual SupsConExpensiveExpensiveConNo Dual PSConLayer 2 OnlyCannot stack more than 4 
For the MDF I would like to use 2 Nexus 5548's with FEX's, and the layer 3 daughter board.  For the IDF's I was thinking of two 4010's.

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Cisco Switching/Routing :: 3560x Or 3750x For Core Switching?

Mar 6, 2013

i cant find any difference in these two devices when i am trying to compare throughput.I need upgrade our new POP and there will be around 4900 MAC adresses in VLAN 150 and 130 MAC adresses in vlan 200.Uplink is 1 gig routed internet connection and there is 14 downlinks to separate villages.i found a few differences for eg stack interface on 3750x but i dont need it.  

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Cisco Switching/Routing :: 3750X Static Routing When Running LAN Base?

Dec 27, 2012

I have a stack of 2 x 3750X switches these are running 12.2(55)SE5. I needed to add some static IP routes and found that the ‘ip routing’ command is not supported. I came across a document that stated “On switches running the LAN base feature, static routing on VLANs is supported only with Cisco IOS Release 12.2(58)SE and later.” So I have upgraded to 12.2(58)SE2, but ‘ip routing’ is still not a valid command.
 
The release notes state:“On the Cisco Catalyst 3560-X and 3750-X Series, it adds support for 16 static IPv4 routes in the LAN Base image.”
 
I have read other posts that talk about running the ‘sdm prefer routing’ command which I have done, but I am still unable to add any routes or run the ‘ip routing’ command.

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Cisco Switching/Routing :: Moving Routing From Perimeter Router To 3750x?

Dec 9, 2012

I have an 1811 with several subnets connected to it.I recently installed a 3750x plant and want to bring my interior routing back to it.
 
All the routing is handled by the 1811 via secondary interfaces on vlan1?
 
I have 192 ports, and subnets show up on almost all of them.  None of the ports are assigned to any specific vlans.  Most ports have several subnets on them.
 
What is the best approach to getting the 3750x to handle the routing?

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Cisco Switching/Routing :: InterVLAN Routing On Switch 3750X?

May 22, 2013

my company pay a switch 3750 X. WS-C3750X-24T-E. It uses IP services basically but I failed to configure InterVLAN routing. why interVLAN routing doesn't work on my switch?

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Cisco Switching/Routing :: Routing Between Vlans On 3750x

Jan 24, 2013

I am setting up a vm environment for a customer in my lab off site. I have two stacked 3750-x switches, a san, and threes UCS c220 M3S servers for hosts. I am trying to separate the lan traffic, san iscsi traffic, and san management traffic using vlans. The problem is i'm unable to communicate cross vlan with my current config, which I have attached to this post. The only noteworthy things in my conifg is that the ip route 0.0.0.0 0.0.0.0 192.168.83.6 is referring to a switch stack they have on site, that I will connect this stack to using the first two trunk ports on each switch, that I do not have here in the lab. I don't want to cause any confusion in why I have things set a certain way.

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Cisco Switching/Routing :: 3750x 12s Says That It Is Not Supported In CNA

Mar 28, 2012

Why does my 3750x-12s switch say it's not supported in CNA??? I upgraded to CNA 5.7.1 and still says unsupported. This device is supported or I'm just missing something.I use CNA heavily to manage our MANY vlans.

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Cisco Switching/Routing :: 3750X Cannot Create A Vrf

Mar 4, 2013

I want to confirm this is a licensing issue. On a 3750X with ipbase, I cannot create a vrf. So I would need the universal image, and that is a seperate license, correct?Is there a link that describes the difference bewteen ipbase and univeral images?

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Cisco Switching/Routing :: 3750X Did Not Have NAT Feature

May 22, 2013

I have a query regarding attached Network Design
 
PC---2960---3750(One Routed Port and All Switched Port)------------------------ 3750(One Routed Port and All Switched Port)-----2960------Internet
 
I have many Vlans on left side of image , Right Side of Image is having internet connection via Modem, and local connectivity between VLAN works fine but Other Vlans Except Vlan1 is able to Access Internet.Note that 3750X did  not have NAT Feature ,How should I able to get Internet on Other Vlans (10,20)

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Cisco Switching/Routing :: How To Know Whether QoS Work On 3750X Or Not

Jan 5, 2013

scenario A
 
A site .
PBX  --->
Data ---> other brand router ----> 3750X  ---> wan

[Code]....

How to know whether QoS work on the 3750X or not ? Is it correct about the config in scenario A ?

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Cisco Switching/Routing :: 3750x - High CPU Log

Feb 3, 2013

I have a one question. I am using Cat3750x-48 switch. Suddenly it has occurred following high CPU log message in Cat3750x-48 switch.
 
%SYS-1-CPURISINGTHRESHOLD: Threshold: Total CPU Utilization(Total/Intr): 62%/0%, Top 3 processes(Pid/Util): 162/40%, 156/10%, 74/1%
 
What is meaning of PID 162 ?

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Cisco Switching/Routing :: Stacking With 3750X?

Jan 1, 2013

There seems to be a lot of conflicting information on what can and can't stack together in the 3750X range.
 
I know that LAN Base can only stack with other LAN Base switches.
 
Can IP Base stack with IP services in 3750X? I have also heard that the 15.x.x IOS restricts mixed feature set stacks?
 
I know that Cisco recommends that all switches in a stack have the same IOS and feature set but having all IP Services in a stack can get too expensive.

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Cisco Switching/Routing :: QoS On 3750X Stack

May 7, 2013

I'm trying to review a QoS setup, and I'd like to make sure I fully understand the current setup before I change anything. I'm seeing output drops on two different queue-thresholds, but not sure how packets are making it to one of the queues.
 
Switch Version
CORE#show ver
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 15.0(2)SE, RELEASE SOFTWARE (fc1)
System image file is "flash:/c3750e-universalk9-mz.150-2.SE/c3750e-universalk9-mz.150-2.SE.bin"
cisco WS-C3750X-24 (PowerPC405) processor (revision A0) with 262144K bytes of memory.
Switch Ports Model              SW Version(code)

I can find queue4-threshold3 in the mappings, but how are packets getting mapped to queue2-threshold1? The priority queue is disabled for this interface, so I'm not sure how this queue is dropping packets, according to the maps nothing is mapped to 02-01.

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Cisco Switching/Routing :: 3750X Power Needs For PoE

Mar 21, 2013

I am building a switch stack using 4 48 port 3750X switches that will also have the power stacked.  If I install a single 715W power supply in each switch will the stack support 802.3af accross all 48 ports on each switch?  My calculations are 48 ports x 15.4W which gives me almost 740W needed which is over hte 715W power supply.  I was reading somewhere were it mentioned that in a powerstack additional power can be drawn from the stack.  I know this will not work if you are trying to support power on all switches accross all ports but would it if say 2 of the 4 switches are needing to provide PoE accross all 48 ports?  If I say we can only use 24 ports per switch for PoE that drops the power need down to 370W which I believe should work.  Just trying to get a better understanding of PoE consumption.  Would the best solution be to just add a second power supply to each switch?

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Cisco Switching/Routing :: Cat 3560 No Switchport Command Test Out Routing With Switch

Dec 8, 2011

The last few days I've been exploring options in getting rid of some old routers accross a wan connections.  I have a cat 3560 to play with and I thought I would try and use the no switchport command test out routing with switch.  I've got some type of route issue and I tried a few things which I thought would fix the issue but had no effect.  I'll post the config and a few commands so you can see what the basic setup is. 

Here we can see in the arp that it knows about both 10.7.1.2 (PC unable to ping 10.3.3.254) as well as 10.3.3.254 (ASA).I tried adding in a ip route of 10.7.0.0 255.255.0.0 10.3.3.110 as well as 10.3.3.254.  Neither produced the results I wanted allowing 10.7.1.2 (PC) to ping the ASA (10.3.3.254). [code]

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Cisco Switching/Routing :: 3750x Rebooting Itself Randomly?

Nov 24, 2012

I have a switch which is rebooting it self, we bought it a year back,its a new switch, i did not find any error on sh ver after rebooting. I am using OP manager, i did not receive any alerts. I have done all diagnostic test, all are passed, i did not find any problem..

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Cisco Switching/Routing :: Cant Create VRFs On A 3750X?

Mar 1, 2013

I am having an odd issue on a couple of new 3750X switches.I am trying to configure VRF-lite and it is not recoginizing the command.Does that make any sense? I have goggled the syntax ans it should be right.

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Cisco Switching/Routing :: L2 Vs L3 Between 1002 And 3750X Core?

Feb 4, 2013

we are replacing network equipment at one of our sites. The network will have 12, 3750X switches(6 stacks) - one stack will be the core. A 1002 will be the WAN router to the Main campus. The 1002 will connect to the core via 2 ethernet cables. I'm debating whether to use L3 or L2 between the router and Core. I've heard that routing is more efficient if L3 is used and also I will be able to create an L3 etherchannel  between the 1002 and Core switch. See the attached doc.

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Cisco Switching/Routing :: CPU Spikes On 3750X Stack

Mar 7, 2013

This 3750X stack (3 members) has some 100% cpu spikes. Is this bad enough to start tracking down the cause(s) or is this somewhat typical and not a reason for concern? I just took this reading. How can you detemine when the 100% and 80% spikes occurred? 
 
 2222233333333332222222222444442222222223333322222222222222
7777733333333338888888888000007777777770000077777888887777
100     

[Code].....

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Cisco Switching/Routing :: 3750X And 3750 Stacking Together

Nov 1, 2012

I have two WS-C3750-48PS-S switches and I need to add two more.  The new part number I am looking at is WS-C3750X-48P-S will these all stack together ?

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Cisco Switching/Routing :: 3750X / Restricting Access To A IP

Jan 12, 2013

This is my scenario. I have my IP as 172.16.1.1 (aaaa.bbbb.cccc.dddd) which has full internet access.  Now when i am not available in the office, i noticed some one assigning my IP in to his workstation and gaining full internet access. How do i restrict such things? i.e. even if some one assigning my IP on the network, they shouldnt access LAN or WAN.I tried 'arp 172.16.1.1 aaaa.bbbb.cccc.dddd arpa' configuring on my L3 Cisco 3750X switch assuming i can acheive, but that did not work.

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Cisco Switching/Routing :: 3560X Or 3750X Support GRE?

May 23, 2013

If the 3560 or 3750 "X" series support GRE.I am pretty certain the older 3750-E does not support GRE (both in hardware and software)Was hoping the new super duper X series do. If not, it could get expensive

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Cisco Switching/Routing :: 3750X IP Base IOS Feature Set?

Oct 26, 2011

I have been looking to find out the list of features that the IP Base IOS has for the 3750X series switch.  What would be ideal is a comparable list but essentially I need to know which of the LAN Base/IP Base/IP Services has SSH functionality. 

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