Cisco Switching/Routing :: C3750 Switch To Increase Accessing Speed

May 19, 2013

Our client having one c3750 with ipbase license switch.They are connected server and end switches to that switch.Our customer want to increase the speed to accessing the server at that time I am told to use etherchannel.Customer happy about this and implement the etherchannel configuration.Now i need to configure etherchannel upto 4 physical link.server are connected on port no Ge1/0/10,they want to bind four phical link GE1/0/10-13.how to configure etherchannel in this switch?

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Cisco Switching/Routing :: WS C3750 Stack Switch Compatibility

Mar 13, 2011

We have existing stack of  3 units of  WS-C3750-48TS-S ( 100 mbps ports with Gigabot uplinks). with IOS as follows, Can we add  WS-C3750G-48PS-S  in this same stack (this is 48 Gigabit ports)?

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Cisco Switching/Routing :: Recommended IOS For Switch C2960S And C3750

Jun 13, 2013

We 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.

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Cisco Switching/Routing :: Upgrading C3750-X Stack Switch

Nov 27, 2012

a) I have three C3750-X switch stack together as my SAN switch and running on the new 15.0 release which is 15.0(1) SE.

b) Recently the master switch rebooted without any explanation. Create ticket with TAC and got an answer that it is due to a bug with ID: CSCtr31957.
 
My question is, which release that should i choose either the 15.0(1) SE3 or the latest 15.0(2)? Will it affect any of my configuration if i change to 15.0(2)?

Finally, what is the best practice to upgrade IOS in a stack whether to upgrade it 1 switch at a time or do it to all at once?

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Cisco Switching/Routing :: Downgrade Firmware On C3750 V2 Switch 24TS-S V07 To 12.2(35) SE5

Apr 10, 2012

Is there a way I can downgrade the firmware on a C3750 v2 switch 24TS-S v07 to 12.2(35) SE5. I have added this new switch to an existing stack but the FW is not compatable. I believe the answer is to upgrade the rest but I cannot afford any down time as they are used to run a CCTV securiy network 24/7. I have included details below to assist with my problem. Switch 4 is the one with a version miss match.

LNB-SWI3750-CTR-01#show verCisco IOS Software, C3750 Software (C3750-IPBASE-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)Copyright (c) 1986-2007 by Cisco Systems, Inc.Compiled Thu 19-Jul-07 19:15 by nachenImage text-base: 0x00003000, data-base: 0x01080000
ROM: Bootstrap program is C3750 boot loaderBOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.2(25r)SEE4, RELEASE SOFTWARE (fc1)
LNB-SWI3750-CTR-01 uptime is 19 weeks, 3 days, 22 hours, 46 minutesSystem returned to ROM by power-onSystem image file is "flash:c3750-ipbase-mz.122-35.SE5/c3750-ipbase-

[code]....

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Cisco Switching/Routing :: C3750-IPServicesk9-m - Cannot Ping VLan When No Port Connect To Switch

Nov 12, 2011

Why I cannot ping vlan when no port connect to switch.

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Cisco Switching/Routing :: C3750-48PS Switch Is Stuck In SYST Mode On Front Panel

Dec 13, 2012

After powering up a WS-C3750-48PS switch, Normal POST LED flashing of lights does not happen, instead the switch is stuck in SYST Mode on the front panel. My attempt to hold down the mode button upon powering up for 15 sec fails to reboot the switch. I cannot console to the switch. Is this switch unrecoverable? Should I RMA with TAC?

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Cisco Switching/Routing :: Accessing 6509 Switch From Sup?

Jan 21, 2013

I have a 6509 running catOS that i had to do some routing changes on this weekend. I guess i forgot to set the default route so now I can't login or ping from outside the local subnet and because of acl restrictions on the vty lines can't login from a device within the local subnet. I can login to the sup module so i'm trying to figure out if there is way to get to the switch from the sup like you would access the sup from the switch by inputting the command session 15 or session 16, is there a way to do the reverse to get to the switch from the sup?

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Cisco Switching/Routing :: Unmanaged Switch And No Way Of Accessing An Interface SE2500

Dec 27, 2012

I am trying to make my LAN to work at home. Its pretty small but I am bearly an smart user, noobie if so.I have a Motorola Cable Modem model SB5101 receiving the internet from Shaw Cable.from there I have an ethernet cable to my switch (Cisco SE2500) from there I have two ethernet cables coming out, one goes to my PC and the other one goes to an Airport Extreme so our laptop.I am just here double checking this info... sice this is an unmanaged switch I guess there is no way of accesng an interface to make this happen.I just hate spending the money in something I wont be using just because I dont know whats going on.

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Cisco Switching/Routing :: 3750 Telnet Still Working When Accessing This Switch

Apr 12, 2012

I only want SSH to be allowed when accessing this switch, but telnet is still allowed, why?  Whe authenticate via radius.version 12.2no service padservice timestamps debug datetime msecservice timestamps log datetime msecservice password-encryption!hostname 3750!boot-start-markerboot-end-marker!logging buffered 64000logging console informationallogging monitor informationalenable secret 5 $1$1K$!username admin privilege 15 secret 5 $1$Bs$cLHusername users view priv3 secret 5 $1$Jfnviwp!!aaa new-model!!aaa authentication login default group radius localaaa authentication enable default lineaaa authorization consoleaaa authorization exec default group radius local !!!aaa session-id commonclock timezone GMT 0clock summer-time BST recurring last Sun Mar 2:00 last Sun Oct 3:00switch 1 provision ws-c3750g-12sswitch 2 provision ws-c3750g-12ssystem mtu routing 1500udld aggressiveno ip domain-lookupip domain-name CB!!login on-failure loglogin on-success log!!crypto pki trustpoint TP-self-signed-3817403392enrollment selfsignedsubject-name cn=IOS-Self-Signed-Certificate-3817403392revocation-check nonersakeypair TP-self-signed-3817403392!!crypto pki certificate chain TP-self-signed-3817403392certificate self-signed 01  3082024C 308201B5 A0030201 02020101 300D0609 2A864886 F70D0101 04050030   31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274   69666963 6174652D 33383137 34303333 3932301E 170D3132 30343133 31303539   33395A17 0D323030 31303130 30303030 305A3031 312F302D 06035504 03132649   4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D33 38313734   30333339 3230819F 300D0609 2A864886 F70D0101 01050003 818D0030 81890281   8100C31D AE6DD8B5 56245317 AD96F4F4 727385D4 97A5B138 488A215E 4294FC40   1C5B2F26 2B75E1CF E562F240 118F2F50 0CFF2449 16EC66EA 2D489F5F F36BFD05   ACCC79CA DDDA984D 4CB7AB DD95A5E0 9274A225 3F5A3634 DEBF1A2A 416E2189   B35B4473 C7D5EE2C E3D41675 A86F31CD.

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Cisco Switching/Routing :: 877 - Getting Junk Language When Accessing Switch Via Console

May 12, 2012

I've been assinged a task to connect our branch office with the head office, so that the IP Phones in the branch office can be connected to Cisco Call Manager at head office. To accomplish this they have given a Cisco 877 Adsl router a 10 Port 3-COM POE Switch and 3 Cisco 7911 IP Phones. Currently the there are 7 PC's Connected to 3 COM Switch which indeed is connected to a Internet router(Speedtouch). First I thought of connectiong the IP Phones to the Ethernet Port on Cisco 877 router but had to change my mind as the ports are non POE ports and I do not have adapters for IP phones. So I've decided to connect the Phones to 3 COM Switch and create VLAN's (DATA & VOICE) and pass the DATA traffic through Speed Touch and Voice traffic through the Cisco 877 router, but when I tried accessing the 3-COM Switch via Console I am getting Junk language( See the attachment for reference).
 
how can I pass through this Junk messeges and access the switch

[Code].....

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Cisco :: C3750 How To Block A Host From Accessing Internet

Mar 5, 2012

I have a VMware workstation on my host computer (windows 7) and the VMware workstation has a virtual machine (windows 7) on the host. We were trying to allow internet access only to the Virtual machine, i.e. to minimize exposure of the host to the internet. I tried to use Vlan Access Control list with MAC ACL to deny the host virtual machine from accessing the internet and allow all other traffic including the virtual machine. The configuration works for some  time and after some time when the virtual machine continously pings the c3750 switch (wher the VACL is implemented), the host also pings the c3750 switch and re-establishes connection with the internet. But when we configured the c3750 switch to deny the VM and allow all other traffic, it works fine. It seems like the host automatically finds a way to get arround the VACL.

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Cisco Switching/Routing :: 3508XL - Set Port Speed To 100 On Old GB Switch?

Dec 19, 2012

We have an old 3508XL switch.  We are trying to connect a new 2960 to it but we purchased the incorrect SFP insert and that speed can only do 100mb.  We are getting link flaps and we suspect that it's a speed issue between the two. However, I cannot find how to set the speed on the old OS of the 3508 switch. 
 
Below is a show version of the 3508 switch.

LR0007>show ver
Cisco Internetwork Operating System Software
IOS (tm) C3500XL Software (C3500XL-C3H2S-M), Version 12.0(5)WC17, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2007 by cisco Systems, Inc.
Compiled Tue 13-Feb-07 15:04 by antonino

[code]....

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Cisco Switching/Routing :: Slow File Transfer Speed In Same Vlan Of 6509 Switch

Mar 16, 2013

I am getting very slow window file transfer speed (4 Mbps per second) between two connecting servers in Cisco 6509 switch. I have connect the two laptops in 6509 switch in same module using the same vlan and try to copy the files from one laptop to another and vice versa and got the same speed on 4 to 5 Mbps per second. Switch utilization is not more than 10% and both the laptops are connected in 1 Gbps full duplex.
 
I have checked by removing the gateway in both laptop but the output is same.

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Cisco Switching/Routing :: C3750 - Data Center / IP Routing

Feb 21, 2013

I have a problem to solve in our data center, see attached drawing. HW: Our core switches consists of two stacked C3750 with ip routing. What I want to do is probably simple but I haven't been able to figure out the best method.
 
VLAN10 and VLAN20 should not be able to communicate with each other. (ACLs?)VLAN10 will have it's own default route/firewall. Both VLAN10 and VLAN20 should be able to send server backups to server in VLAN30. All 3 V LANs come in on a trunk from a pair of stacked C2960-S. I need it to be able to scale if we have 50 VLANs for instance, hopefully without long complicated ACLs. I've been considering VRF's, PBR but can't decide what's the simplest solution to this problem. I have never done this before so I would prefer to start off on the right foot.

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Cisco Switching/Routing :: Configure Q-in-Q On WS-C3750-24PS?

Nov 6, 2011

I have  WS-C3750-24PS  version 12.2(55)SE4.  I am configuring PBB VPLS.   MY PE/P routers are alcatel 7710/7750
 
my topology is like that. 
  
CE1<-------> Provider_switch(3750)<-------> PE1 < ----IP/MPLS----> PE2<-------> Provider_switch(3750)<----------->CE2
16                        11                                                                                                 11   

[Code].....

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Cisco Switching/Routing :: C3750-X Stacking Configuration

Mar 30, 2013

I am having troubles to get 2 C3750-X switches WS-C3750-X-48P-L) to stack.   They are both running  iOS 15.0(2)-UNIVERSALK9, and are licensed for IP Base.
 
If I connect stack port 1 of switch 1 to stack port 2 of switch 1, and  stack port 1 of switch 2to stack port 2 of switch 2 I get the following:
 
WS-C3750-X_STACK1_SW1>show switch stack-ports summary
Switch#/  Stack   Neighbor   Cable    Link   Link   Sync      #         InPort#     Port              Length    OK   Active   OK    Changes   Loopback          Status

[Code].....
 
I have tried restarting (powering off for about 1 min and turning back on) simultaneously, and powering off switch 1 for 1 min and switch 2 for 2 min.   I have also tried both enabling the stack ports, and disabling followed by enabling.

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Cisco Switching/Routing :: C3750 SFP Failure After Reload

Mar 11, 2013

I have a cable from an SFP module in a WS-C3750-48P with 12.2(55)SE1 running to a Gigabit port on a Cisco WLC. After the switch recovers from a power failure, the gigabit autonegotiation fails. The cure is a long drive to unplug and reseat the SFP. Note this happens at too many similar sites for this to be a loose connection. Interface shutdown then 'no shutdown' is not sufficient. The state is 'line protocol is down (not connected)'. Interface is configured for switchport mode trunk (auto speed, auto duplex). Command 'switchport nonegotiate' makes no difference. Is there a more powerful command than 'shutdown' which might toggle the interface signals? Is there some way of resetting the SFP? sh int gi 1/0/1 displays 'media type is 10/100/1000BaseTX SFP' and zero packets received.

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Cisco Switching/Routing :: Message Error With C3750-I5-M

Jan 2, 2008

I have this system: IOS (tm) C3750 Software (C3750-I5-M), Version 12.1(19)EA1d, RELEASE SOFTWARE (fc1
 
An error appear in console (many times in one minute):
 
Jan  3 16:25:37: %LINK-3-BADMACREG: Interface StackPort1, non-existent MACADDR registry for link 0
-Process= "<interrupt level>", ipl= 4
-Traceback= 20A364 187F04 58D6FC 58B950 2D7CE0 2E00C8 2E2BEC 2E2F24 2B0BF8
 
What is the problem? What is the solution?

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Cisco Switching/Routing :: C3750 - ACL Building For QOS Or Policing

Jun 6, 2012

I would like to apply policing on a C3750 interface, for all traffic matching 10.0.0.0 / 8, except for sub net 10.0.0.0 / 24. I plan to apply the following configuration, with an ACL that denies 10.0.0.0 / 24 then accept 10.0.0.0 / 8. I am quite sure of the answer but need a confirmation about the following configuration correct ? (10.0.0.0 / 24 will be not blocked, and no policing will be apply on it?)
 
ip access-list extended TEST
deny tcp 10.0.0.0 0.0.0.255 any eq 5000
permit tcp any 10.0.0.0 0.255.255.255 any eq 5000
[code]....

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Cisco Switching/Routing :: C3750 - Packets Lost

Nov 21, 2011

I have a stack of 2 C3750-switches (WS-C3750G-24TS-1U) with IPBASE-firmware (12.2(52)SE). 
 
When I ping to a machine (in this case a virtual one), the replies are always received on the port where the machine is connected, but on the port-channel connecting to the stack of the 'pinging device' the reply comes only for certain initiators, and not for all.
 
Setting:
Gi1/0/6: Device/Server I want to connect too ; defined as access port
Gi1/0/25 + Gi2/0/25, as Port-Channel 1: The location of the devices I connect (read as: the uplink to the stack of the PC's), defined for Dot1Q-trunking
 
Monitoring setup: Source ports: Both: Gi 1/0/6, Po1 (or Po1 replaced by both interfaces)
 
For the machines which can ping the server I see 2 echo (ping) requests, followed by 2 echo (ping) replies ... So once seen on the Po1, and once seen on the interface Gi1/0/6.

However for other machines, the 2nd reply is missing ; which must be caused by the dropping of these packets in the switch.  At least, I my opinion this must be the reason... But I can't see any (change of) output drops at int Po1, nor at Gi1/0/6.  The CPU doesn't seem to have high usage, and even then, I don't think the error would be constant, as it's always failing for some PC's, and never for others... (at least for a certain time, a few hours it can be constant, the problem dissapears from time to time).

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Cisco Switching/Routing :: To Change SDM Template C3750 Stack

Feb 4, 2013

According to cisco manual in order to change SDM template i need to reboot switch, but when i have C3750-X stack do i need to reboot stack or maybe will be enough reboot in sequence the stack members?

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Cisco Switching/Routing :: C3750 Switches MAC Address Authentication

May 9, 2013

We are deploying the  ISE MAC address authentication by-pass (mab) feature in our network as an alternative to port security on the switch port. Works well except for certain devices e.g. printers, snmp modules, and Unix/Linux Operating systems which can range from 5-10 minutes to never in authentication/opening the port.

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Cisco Switching/Routing :: Can Stack (ws-c3750G-12s) With (ws-c3750X-24p-poe-s) With (ws-c3750-48p-10/100 Poe)

Feb 3, 2012

can i stack cisco (ws-c3750G-12s) with (ws-c3750X-24p-poe-s) with (ws-c3750-48p-10/100 poe) i mean even a switch is 10/100 and the other switch is 10/100/1000?

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Cisco Switching/Routing :: Upgrade C3750-stack Without Downtime?

Sep 30, 2009

Is it possible to upgrade a c3750-stack one member at a time to avoid downtime? I need to keep L3-functionality up.
 
If I have one etherchannel from access-switch (2 channel-ports in 3750, in different stack-members), my 3750-stack as a distribution layer switch, and another etherchannel (also spread over multiple stack members) to core, can I upgrade the entire stack without traffic interruption?

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Cisco Switching/Routing :: C3750 - Running Configuration File

Aug 7, 2008

We have a bunch of switches that are running fine but the running-config file is missing and we can't save the config to the tftp server. IOS is c3550-ipbasek9-mz.122-37.SE1.  I've got lots of these switches running the same code that are just fine.

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How To Increase Network Speed

Jun 25, 2011

how to increase speed in my network (10 pc)

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Cisco Switching/Routing :: To Add WS-C3750-48TS-E To WS-C3750E-48td Stack

Feb 13, 2012

Is that possible add WS-C3750-48TS-E to ws-c3750e-48td stack?

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Cisco Switching/Routing :: Catalyst WS-C3750-48P And WS-C3750G-16TD Stack?

Jan 1, 2012

I have 8 switch stack consisting of six WS-C3550-48P and two WS-C3750G-16TD running software vesrion 12.2(25) SEB1. When I added new C3750v2-24PS (running image 12.2(50) SE5) in stack so I up-graded the image of existing 8 switches with latest veriosn 12.2(50) SE5. Once I have done with the upgrade then all ports of my stack switches went down after around five minuts. Is it image compatibility issue with existing switches or something else?

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Cisco Switching/Routing :: C3750 / Layer 2 Loop Protection Enhancement?

Feb 19, 2012

we recently had on our network a simple layer 2 loop problem, with big effects.Here is the situation: we have a C3750 switch, with STP activate on all ports.We don't have total control on this switchs, and for some reasons, it is possible that people connect  a 2d switch on it (Cisco or non-Cisco).What happened several times is a classic case: a person interconnect 2 ports of this 2d switch, creating a loop. As the loop is created on the 2d switch only, the 1st switch detect no loop, the the uplink port keeps up.Afer this loop created, a broadcast storm occurs through the link between 1st & 2d switch .. and the storm propgates all over the LAN.I try to find some solutions to avoid that. One thing I would like to do is to find a mecanism on the first switch, which can permit to block the uplink port on the 1st switch if it sees the same MAC address as source in the 2 directions.Note that storm control, even configured to a quite low value (ie: 2Mbps) is not efficient enough to protect equipment (we have had big CPU impact on LAN equipments).

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Cisco Switching/Routing :: Object Group In C3560 & C3750 Switches?

Feb 16, 2011

I have two  layer 3 switches C3560 and C3750 Cisco switches with ios version "ipservices-mz.122-35.SE5".Now with the current ios version, these layer 3 switches are not supporting object group.so my question is , do i need to upgrade the ios, for this feature, if yes, which version ?

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Cisco Switching/Routing :: Does WS-C3750-12S Support Both Single And Multi-mode

Oct 11, 2012

I have a new building to add to our campus and I have been encouraged to run single mode fiber. All of my other buildings are connected with multi-mode fiber. I just want to make sure i will not have an issue if I run single mode to the new building with SM SFP's.

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Cisco Switching/Routing :: Stack WS-C3750-24FS With WS-C3750X To Use C3KX-SM-10G

Aug 9, 2012

We have WS-C3750-24FS switches stacked supporting users on our LAN. I want take advantage of the netflow capabilities of the WS-C3750X using the C3KX-SM-10G card.
 
Would I be to see netflow data coming from the WS-C3750's if I stacked it with the WS-C3750X?
 
Also I read that the C3KX-SM-10G card would support a 1G SFP is that correct?

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