Cisco SG300-28 / SGE2000 / Catalyst 2960

Hello everyone,
I'm looking for switch to accompany Cisco ASA 5520 in data center, with 20+ GE ports and no need for PoE.
I would like to understand the difference between Cisco SG300-28, Cisco SGE2000 and Cisco Catalyst 2960, 2960-C and 2960-S Series (except specific number of ports). As far as I can see the Cisco SGE2000 has 4x SFP and is stackable unlike the SG300 with 2x miniGBIC/SFP, but not much else. Cisco Catalyst 2960 series offers some additional features like USB storage, but I can't imagine I will need that.
Any suggestions?
Thank you
Dan

Similar Messages

Catalyst 2960 Problem with Cisco SPA512

Hi there,
I hope someone can help me.
I don't have much experience with switches, I'm doing the desktop support in our company.
We have Catalyst 4510 R+E to 2 Catalyst 2960 switches and seperate VLAN's for IP Phones and for Internet in one part of our office.
Now I'm running into trouble with some IP Phones that are connected to the 2960 switches. It appears only to happen with Cisco's SPA-512. I've tried FW 7.5.2, 7.5.5 and 7.5.5b. These phones sporadically drop the call / connection, with the red MIC button blinking. Based on my research this means that it looses Internet connection. I have 1 SPA512 with FW 7.5.1 that does not show these symptoms.
I have other phones SPA942 and Polycom IP335 in the same area behind the same switches and no issues.
We've tried to disable auto negotiate and set a fixed transmition rate or either 1Gbps and 100Mbps, both without success.
I also have SPA512 in other areas of the office just connected to our Catalyst 4510 R+E and they work just fine. That's why I don't believe it has anything to do with the 4510, but I can be wrong.
That's all I have for you guys. Hope someone can help me to fix / troubleshoot this..
Frank

SSwitch3#test cable-diagnostics tdr int g1/0/16
TDR test started on interface Gi1/0/16
A TDR test can take a few seconds to run on an interface
Use 'show cable-diagnostics tdr' to read the TDR results.
SSwitch3#show cable-diagnostics tdr int g1/0/16
TDR test last run on: June 27 13:39:21
Interface Speed Local pair Pair length        Remote pair Pair status
Gi1/0/16 1000M Pair A     52   +/- 10 meters Pair A      Normal
                Pair B     52   +/- 10 meters Pair B      Normal
                Pair C     52   +/- 10 meters Pair C      Normal
                Pair D     52   +/- 10 meters Pair D      Normal
SSwitch3#

802.1x on Cisco Catalyst 2960

I am trying to enable 802.1x on one of
the switchports of the Cisco Catalyst
2960:
C2960#sh run | i radius
aaa authentication login test group radius local
aaa authentication dot1x default group radius
radius-server host 10.250.97.26 auth-port 1812 acct-port 1813
radius-server source-ports 1645-1646
radius-server key 123456
C2960#sh run | i dot
aaa authentication dot1x default group radius
dot1x system-auth-control
dot1x guest-vlan supplicant
dot1x critical eapol
C2960#conf t
Enter configuration commands, one per line. End with CNTL/Z.
C2960(config)#int g0/14
C2960(config-if)#dot1x ?
% Unrecognized command
C2960(config-if)#dot1x
As you can see, I can not enable 802.1x
at the interface level. The code is am running is 12.2.25SEE4:
Switch Ports Model SW Version SW Image
* 1 24 WS-C2960G-24TC-L 12.2(25)SEE4 C2960-LANBASEK9-M
System image file is "flash:c2960-lanbasek9-mz.122-25.SEE4.bin"
According to Cisco, this image supports
802.1x. Why can't enable it at the
interface level?
Can someone help me out? Thanks.

some additional info:
C2960#sh dot1x all
Sysauthcontrol Enabled
Dot1x Protocol Version 2
Critical Recovery Delay 100
Critical EAPOL Enabled
C2960#

Cisco catalyst 2960 booting garbage, help on restore IOS

Dear All,
This is my first time on terminal access of Cisco Catalyst 2960 (2960TC-L), normally would use the web configuration for most task.
Now the switch has an issue with the web interface and when I try to access through terminal, I was greeted with garbage upon the booting of the switch, I searched for the terminal boot process and it wasn't what I was expected for my switch. I was a bit dumbfound now of how can I recover the firmware to its default stage, now that I cannot even boot through its terminal console.
Any help is highly appreciated. Thank you for your time.

Hi,
I just verified with my colleague of whom have done quite a few bits before I took over his task.
His reply was he actually did an IOS flash before, though I'm not sure how he did it, but according to him, it was actually a success and the web interface still works for few times before it become like this.
As I tried another time to goes into root mode (or Admin mode??) for the switch, the steps as I performed below:
1. Refer to cisco-2960-putting-setting.jpg for the settings. I press Open and it does display the console Window, no issue there.
2. I hold the "mode" button on the switch and turn on the switch power, and after few seconds the screen display as such (refer to cisco-2960-putty-output2.jpg), the SYST L.E.D. did flash with following pattern: Green (blink ~15 times) then Orange-Green (repeat blink twice) then Green (stable light), for this I was expecting it to goes off after few seconds but it didn't, I wait about a minute before I let go the "mode" button.
3. After I let go the "mode" button, it goes to the screen (refer cisco-2960-putty-output3.jpg), and the SYST still blinking, possibly infinitely... with the console output screen stays like that... and whatever I entered display weird/garbage characters instead, I can't do anything on it.
Each tries display different weird characters, as the SYST still blinking infinitely.
I'm unsure if I'm giving enough details for online troubleshooting, I'll try my best to give as per instructed.
Thank you for your time.

Cisco Catalyst 2960-X and Cisco Prime compatibility

Hello All,
I had review all the compatibility matrix of versions of Cisco Prime 1.2, 1.4 and 2.0, and just can't find the Cisco Catalyst 2960-X series as a listed device, which really surprises me.
Can you clear that out??
Thanks,

The 2960X (and XR) support was added with Device Pack 2 for PI 2.0. It was released on 22 January 2014 and is available here.
(PI 2.1 won't be out until later this year, release date not yet announced.)
Following are the 2960X/XR types added:
Cisco Catalyst 2960-X Series Switches
Device Type
SYSOIDS
S/W Version
Software
Cisco Catalyst 2960X-24TS-L Switch
OID:1.3.6.1.4.1.9.1.1699
>=12.1
IOS
Cisco Catalyst 2960X-48FPD-L Switch
OID:1.3.6.1.4.1.9.1.1690
>=12.1
IOS
Cisco Catalyst 2960X-48LPD-L Switch
OID:1.3.6.1.4.1.9.1.1691
>=12.1
IOS
Cisco Catalyst 2960X-48TD-L Switch
OID:1.3.6.1.4.1.9.1.1692
>=12.1
IOS
Cisco Catalyst 2960X-24PD-L Switch
OID:1.3.6.1.4.1.9.1.1693
>=12.1
IOS
Cisco Catalyst 2960X-24TD-L Switch
OID:1.3.6.1.4.1.9.1.1694
>=12.1
IOS
Cisco Catalyst 2960X-48FPS-L Switch
OID:1.3.6.1.4.1.9.1.1695
>=12.1
IOS
Cisco Catalyst 2960X-48LPS-L Switch
OID:1.3.6.1.4.1.9.1.1696
>=12.1
IOS
Cisco Catalyst 2960X-24PS-L Switch
OID:1.3.6.1.4.1.9.1.1697
>=12.1
IOS
Cisco Catalyst 2960X-48TS-L Switch
OID:1.3.6.1.4.1.9.1.1698
>=12.1
IOS
Cisco Catalyst 2960X-24PSK-L Switch
OID:1.3.6.1.4.1.9.1.1700
>=12.1
IOS
Cisco Catalyst 2960X-48LPS-S Switch
OID:1.3.6.1.4.1.9.1.1701
>=12.1
IOS
Cisco Catalyst 2960X-24PS-S Switch
OID:1.3.6.1.4.1.9.1.1702
>=12.1
IOS
Cisco Catalyst 2960X-48TS-LL Switch
OID:1.3.6.1.4.1.9.1.1703
>=12.1
IOS
Cisco Catalyst 2960X-24TS-LL Switch
OID:1.3.6.1.4.1.9.1.1704
>=12.1
IOS
Cisco Catalyst 2960-XR Series Switches
Device Type
SYSOIDS
S/W Version
Software
Cisco Catalyst 2960XR-48FPD-I Switch
OID:1.3.6.1.4.1.9.1.1797
>=12.1
IOS
Cisco Catalyst 2960XR-48LPD-I Switch
OID:1.3.6.1.4.1.9.1.1798
>=12.1
IOS
Cisco Catalyst 2960XR-48TD-I Switch
OID:1.3.6.1.4.1.9.1.1799
>=12.1
IOS
Cisco Catalyst 2960XR-24PD-I Switch
OID:1.3.6.1.4.1.9.1.1800
>=12.1
IOS
Cisco Catalyst 2960XR-24TD-I Switch
OID:1.3.6.1.4.1.9.1.1801
>=12.1
IOS
Cisco Catalyst 2960XR-48FPS-I Switch
OID:1.3.6.1.4.1.9.1.1802
>=12.1
IOS
Cisco Catalyst 2960XR-48LPS-I Switch
OID:1.3.6.1.4.1.9.1.1803
>=12.1
IOS
Cisco Catalyst 2960XR-48TS-I Switch
OID:1.3.6.1.4.1.9.1.1804
>=12.1
IOS
Cisco Catalyst 2960XR-24PS-I Switch
OID:1.3.6.1.4.1.9.1.1805
>=12.1
IOS
Cisco Catalyst 2960XR-24TS-I Switch
OID:1.3.6.1.4.1.9.1.1806
>=12.1
IOS
Cisco Catalyst 2960XR-48FPD-L Switch
OID:1.3.6.1.4.1.9.1.1807
>=12.1
IOS
Cisco Catalyst 2960XR-48LPD-L Switch
OID:1.3.6.1.4.1.9.1.1808
>=12.1
IOS
Cisco Catalyst 2960XR-48TD-L Switch
OID:1.3.6.1.4.1.9.1.1809
>=12.1
IOS
Cisco Catalyst 2960XR-24PD-L Switch
OID:1.3.6.1.4.1.9.1.1810
>=12.1
IOS
Cisco Catalyst 2960XR-24TD-L Switch
OID:1.3.6.1.4.1.9.1.1811
>=12.1
IOS
Cisco Catalyst 2960XR-48FPS-L Switch
OID:1.3.6.1.4.1.9.1.1812
>=12.1
IOS
Cisco Catalyst 2960XR-48LPS-L Switch
OID:1.3.6.1.4.1.9.1.1813
>=12.1
IOS
Cisco Catalyst 2960XR-48TS-L Switch
OID:1.3.6.1.4.1.9.1.1814
>=12.1
IOS
Cisco Catalyst 2960XR-24PS-L Switch
OID:1.3.6.1.4.1.9.1.1815
>=12.1
IOS
Cisco Catalyst 2960XR-24TS-L Switch
OID:1.3.6.1.4.1.9.1.1816
>=12.1
IOS

Error in switch ports POE model, "Cisco Catalyst 2960S-24PS-L Switch"

I have problem with the poe switch Cisco Catalyst 2960S-24PS-L posts does not respond, and me the following error resporta was t
%PLATFORM_ENV-3-ILP_PORT_POST_ERR: %s can’t be brought up because it failed POST
in Inline Power test.
he source of that error and what are the possible causes

Hey Dustin,
Device needs to be RMA'ed. The inline power supply has failed.
HTH.
Regards,
RS.

Last version Cisco Catalyst 2960-24PC-L Switch (bugs study)

Hi team,
I need know, what´s the last IOS version to Cisco Catalyst 2960-24PC-L Switch and understand the bug study about these versions?
How make a bug study?
If you have any information, please let me know.
Regards,
Yerko.

Latest release as of January 14th is 15.0.2-SE5 (Release Nov 6, 2013)
There aren't any public utilities in the Cisco website that provides you with a bug study.
We have a bug tracker https://tools.cisco.com/bugsearch/?referring_site=popular but it will be extremely time consuming to identify each bugs and if you are affected.
If you are a Cisco Advanced customer with optimization services in your contract, this deliverable can be done for you at no cost.

MIB Extension - Cisco Catalyst 2960 -

Hi everyone,
I would like to monitor a cisco catalyst 2960 provided with IOS v15. I accessed mib files and I found that many component are disabled or have no entry in it (check attachment).
So my question is : Can I extend the mib to support more OIDs ? and if so, I'll be glad if you give a tutorial or example !
Thank you so much.
Best regards,

Your ipRouteTable and EGP MIBs are disabled because the 2960 is a layer-2 switch only, so it does not have any ip routing or EGP. The MIBs will be disabled for features your switch does not support.
Kevin Dorrell
Luxembourg

Moving VLAN config from catalyst 2960 to SG300

Dear all,
my existing catalyst 2960 config for vlans:
interface FastEthernet0/2
description 3Com Switch
switchport access vlan 10
switchport mode access
interface FastEthernet0/5
description to Cyberoam
switchport mode trunk
interface FastEthernet0/18
switchport access vlan 40
switchport mode access
interface FastEthernet0/19
interface FastEthernet0/20
switchport access vlan 20
switchport mode access
interface FastEthernet0/21
interface FastEthernet0/22
interface Vlan1
no ip address
no ip route-cache
interface Vlan10
ip address 192.168.0.51 255.255.255.0
no ip route-cache
Inside trunk there are VLAN10 (native), VLAN20,30,40
now, when I try to configure the same on SG300 I get trunk issues - no VLAN10 (native) inside trunk.
Regards
GN

Hi Mlechte, I cheated on your question a bit. I have used two SG300-52 switches. I am able to accomplish what you're asking with these models.
On my master switch the configuration fundamental is simple. For argument sake, I disabled all CDP. I create vlan 100 for voice. Assigned my voice vlan 100. I enabled LLDP on every port. I enabled every optional TLV on every individual port.
I then connected a 100% factory default SG300-52 to the 'master switch'. After about 3 minutes the VSDP created the voice vlan, the link between switches became 1u, 100t. The vlan database populated the vlan 100 and everything just worked nicely.
So, to answer your inquiry, if your 2960 supports the same TLVs it should work okay.
I do recommend you use the SX300 series, it is a much more robust switch, supports full CLI and has a lot better feature set. A SG300-08 (srw2008-k9-na) is around $250. The SG200-08 is about a $100 cheaper. The difference between models is astronomical and a much better investment.
Please review
console_log_master <--This is the switch that will advertise to the downstream
console_log_receive <-- This is a default switch that received the LLDP information
-Tom
Please rate helpful posts

Catalyst 2960 - IBM/Cisco IGESM - Trunk port configuration

Good day all!
I am new in Cisco world and try to configure a trunk between a Catalyst 2960 switch and a IBM Blade Center IGESM switch (manifactured by Cisco).
Unfortunately, it seems that the network traffic doesn't cross the trunk link.
I have followed (at least, I think so) the instructions given on the different Cisco documentation papers but I can't find the mistake in my configuration (lack of experience :-( !).
Both switches are using IOS. 2960 uses IOS 12.2(25)FX and IGESM uses IOS 12.2(22)EA8.
The ports are connected through a cross-over cable Cat5e.
Please find below the configuration for each ports:
Catalyst 2960:
Name: Gi0/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 200 (Workstation VLAN)
Trunking Native Mode VLAN: 200 (Workstation VLAN)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: 1,99,200
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
IBM/Cisco IGESM:
Name: Gi0/20
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 200 (Workstation VLAN)
Trunking Native Mode VLAN: 200 (Workstation VLAN)
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: 1,99,200
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
For my test, I try to ping a blade (connected to IGESM) in VLAN 200 from a workstation connected to Catalyst 2960 (in VLAN 200 too). From a network anaylser (ethereal), I can see the ARP broadcast from each side but none are going across the trunk link.
I am a bit lost about this problem and would be grateful for any assistance in solving it!
Many, many thanks in advance for your time!
Best regards,
Fabian

Hi Glen!
Both switches (Catalyst 2960 & IGESM) are brand new and most ports are still reflecting manufacturer's default configuration. Vlan 2 is the default native vlan for IGESM ports (excluding ports used for switch management which use vlan 1 as most Cisco switches).
I changed the native vlan for g0/5 on IGESM to 200. Now, ports g0/5 (access mode) and g0/20 (trunk mode) are on native vlan 200. On g0/5 is installed Windows 2003 instance (firewall disabled). The only purpose is to receive and send ping request to test connectivity.
My workstation is connected to 2960 switch on port fa0/1 (please find the configuration below). I can successfully ping other vlan 200 machines connected on the same switch. For testing purpose, I try to ping the blade machine connected on port g0/5 on IGESM.
Configuration of fa0/1:
Name: Fa0/1
Switchport: Enabled
Administrative Mode: dynamic auto
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: On
Access Mode VLAN: 200 (Workstation VLAN)
Trunking Native Mode VLAN: 200 (Workstation VLAN)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
Is there any other information I could provide to better help you to understand the configuration?
Cheers!
Fabian

Problem with Cisco Catalyst 2960

I've got a problem with the Catalyst 2960 / 24TCL switch. The Flash-directory was empty. After I copy with xmodem the firmware bin-file into the flash-directory and installed it .. I miss the HTML-Directory. Can somebody tell me how I can get it back?

SSwitch3#test cable-diagnostics tdr int g1/0/16
TDR test started on interface Gi1/0/16
A TDR test can take a few seconds to run on an interface
Use 'show cable-diagnostics tdr' to read the TDR results.
SSwitch3#show cable-diagnostics tdr int g1/0/16
TDR test last run on: June 27 13:39:21
Interface Speed Local pair Pair length        Remote pair Pair status
Gi1/0/16 1000M Pair A     52   +/- 10 meters Pair A      Normal
                Pair B     52   +/- 10 meters Pair B      Normal
                Pair C     52   +/- 10 meters Pair C      Normal
                Pair D     52   +/- 10 meters Pair D      Normal
SSwitch3#

Cisco Network Assistant MAC search in Catalyst 2960

Hi,
Since I updated a Catalyst 2960 switch to IOS version 12.2(55)SE1 I can't do searchs by MAC address, when I do "Monitor->Search" the following error appears:
"The software version of the selected switch does not support some of the CLI commands in read-only mode for this window. You must have read-write access to this switch to display complete information in this window"
If packets are captured you can see that the issued command by the CNA host is "GET /exec/show/mac-address-table/", the answer from the switch is:
"show mac-address-table
^
% Invalid input detected at '^' marker.
If I do "Configure->Switching->MAC Address" instead I get the mac address-table correctly. In this case the issued command is "GET /exec/show/mac/address-table/dynamic" and no error is displayed, the answer from the switch is the list of mac-address table.

I have some site admins that use CNA. I just upgraded their LAN to 3560v2 switches running 12.2(58)SE2 and had them upgrade their CNA software to CNA 5.7(6). They reported the same error.
I think you clearly indentified the problem. At one time the IOS command parser accepted both "show mac-address" and "show mac address". At some point IOS stopped accepting the older "show mac-address" format, and CNA is still issuing this command regardless of the IOS version it is trying to manage.

Installed wrong image on Cisco Catalyst 2960

some time ago I did an IOS upgrade on the Catalyst 2960, however I used the wrong image and caused the switch CAN NOT load properly. My switch is c2960 but I used c2960s, what a big mistake.
When the switch boots, and it hangs on the execution of the image, because c2960s image will not work on c2960.
Anyone got some idea how I can fix this? I tried to restart the switch and pressed "Break" on the terminal, and it didn't stopped.
Using driver version 1 for media type 1
Base ethernet MAC Address: fc:fb:fb:f4:5b:00
Xmodem file system is available.
The password-recovery mechanism is enabled.
Initializing Flash...
mifs[2]: 0 files, 1 directories
mifs[2]: Total bytes : 3870720
mifs[2]: Bytes used : 1024
mifs[2]: Bytes available : 3869696
mifs[2]: mifs fsck took 0 seconds.
mifs[3]: 529 files, 19 directories
mifs[3]: Total bytes : 27998208
mifs[3]: Bytes used : 24108032
mifs[3]: Bytes available : 3890176
mifs[3]: mifs fsck took 11 seconds.
...done Initializing Flash.
done.
Loading "flash:/c2960s-universalk9-mz.122-58.SE1.bin"...@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
File "flash:/c2960s-universalk9-mz.122-58.SE1.bin" uncompressed and installed, entry point: 0x3000
executing...
Thanks,
David

Hi David,
You have interuppt and get to the rommon mode and give boot: <old IOS image> if you have....
if that has been deleted.... then you have go with the recovery procedures like x modem or something
Regards
Karthik

Troubleshooting Fiber Connection on a Catalyst 2960

I am trying to test my fiber connectivity on a Catalyst 2960 before I deploy it. So what I thought I would do is connect it to another switch in my office with a open port for the fiber connection. The other switch is a Catalyst 3560G. Here are the port configurations:
interface GigabitEthernet0/2
switchport trunk allowed vlan 1,100
switchport mode trunk
macro description cisco-switch
interface GigabitEthernet0/25
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,100
switchport mode trunk
The first one is the catalyst 2960 and the 3560G is the second.
When you show the interface for each of these it shows that it recognizes the media but the line protocal and the GigbitEthernet Port is down.
Any Ideas?

Sorry... a fiber optic cable with a connector on each end.
To aid in troubleshooting, many times we loopback the signal back to the originating device. An optical loopback is just connecting the transmit (Tx) to the receive (Rx).
The multimode SFP/GBIC transceiver you are using will allow you to directly connect the Transmit and Receive ports without damage to the unit. This should provide you with a green link LED.
If so, then you can reconnect your fibers and loopback (connect the two fibers together) at the far end of the fiber link (use an optical adapter) and see if you get a green LED.

Catalyst 2960 SF Stacking

Hi
I am stacking 6 Catalyst 2960 SF Series PoE 48 ports, I am using the Bladestack cable. I plug it in from 1 to 2 on all the switches. If I look at the lights it shows 4 in on group and 2 in another. If I do a show switch detail it shows the following
Switch/Stack Mac Address : 44ad.d982.a100
                                           H/W   Current
Switch# Role   Mac Address     Priority Version State
1       Member 5006.0425.7e00     1      1       Ready
*2       Master 44ad.d982.a100     1      1       Ready
3       Member 5006.0435.bc00     1      1       Waiting
4       Member 5006.04d8.7000     1      1       Ready
         Stack Port Status             Neighbors
Switch# Port 1     Port 2           Port 1   Port 2
1       Down        Ok              None       2
2        Ok         Ok                4        1
4       Down        Ok              None       2

Hi , i think only four 2960 SF switches can be stacked into a singe logical switch.
Please refer the link , hope this helps:
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/white_paper_c11-578928.html

Cisco SG300-28 / SGE2000 / Catalyst 2960

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