Cisco Switching/Routing :: How To Use USB Option On 2960s

Nov 5, 2011

just got new hardware and decided to try the newer USB port for IOS upgrades. I could not get the switch to recognize my 2gig flash drive. Do I need a proprietary stick or special format?

I also noticed when I removed it the switches crash dump and rebooted?

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Cisco Switching/Routing :: IOS Upgrade Option In 2960S Switch

Dec 11, 2012

We  have a Cat2960-S Series PoE+ currently running 12.2(55) SE5 ios with SW image C2960S-UNIVERSALK9-M.We want to upgrade the ios to the lastest version but found there are 2 version: 12.2(53) SE2 and 15.0(1) SE.Which is the best & suitable for upgrade?

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Cisco Switching/Routing :: Option For WS-C3560X-48T-S

Jul 16, 2012

Im trying to find an affordable Cisco switch with similar capabilities and features as the WS-C3560X-48T-S (L2/L3 routing as in IP Base, dual power supply, etc.).

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Cisco Switching/Routing :: SG300-52 - CLI Configuration Option

Dec 10, 2012

I am trying to configure Cisco SG300-52 switch for the first time and stuck without CLI configuration option. The configuration can be done using GUI, however, configuring using CLI would be more comfortable (as I am used to work with CLI of other Cisco switches)..
I was able to lo gin to switch using SSH, but the CLI appears in MENU format and was not able to find any way to go to CLI mode.
As per some blogs, in SG300 switches CLI mode can be accessed using Ctrl + Z in Menu, which did not work either in my case.
Switch is running with latest firmware version Sx300 Firmware Version

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Cisco Switching/Routing :: 4948 No Option For X-modem

Sep 19, 2012

I am updating the iOS for a 4948 the bootflash is empty so all i can get into is the rommon. There is no option for x-modem. How can I put the iOS onto this device? [code]

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Cisco Switching/Routing :: Why Does Routing Work Without Declaring Vlan10 On 2960s-24td-l

Oct 28, 2012

I have recently split the voice vlan (10) from the data network (1), and am wondering why my catalysts and router do not require an interface Vlan10 statement.  In the past I used OpenBSD boxes to do the routing, and I first needed to configure vlan 10 on the interface before I could get inter-vlan communication to work.  With these Cisco devices it works, and I am wondering if it is because of VTP, for the fact that the ports maybe just pass all traffic, or is there some other explanation?  Below is the setup, and firmware is up-to-date on all of the devices.
When I plug a phone into the POE SGE, the phone turns on, obtains an address on the proper subnet, and conversations are clear (whereas without the ip nat inside on the new subnet the calls had a lot of static).  Possibly the reason that it works is because the phones properly create the tcp/ip packet, and it hops over the trunks and creates the states so that traffic routes back properly.  I will install wireshark to see exactly what is going on, but is there a simple explanation that I am overlooking?

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Cisco Switching/Routing :: How To Enable Multicast Routing On 2960s

Mar 23, 2013

I need to enable multicast routing on 2960s but the command "ip multicast-routing" isn't available on my release (12.2.(55)).
From which release this command is available?     

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Cisco Switching/Routing :: 2960S And MLS QoS Map

Oct 8, 2012

I have C2960S-48FPS-L and C2960S-24TS-S both of them are using C2960S-UNVERSALK9-M image with version 15.0(2)SE on both I run "mls qos"
and on 48FPS-L I run "mls qos map cos-dscp..."on 24TS-S I cannot run it. there is no such command. there is just "mls qos rewrite..." and "mls qos srr-queue..." variants. 
I thought that one image give the same set of commands...?

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Cisco Switching/Routing :: Adding Dhcp Option 82 On C2960S

Dec 12, 2012

I 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.

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Cisco Switching/Routing :: 4507R+E / SSO Not Available As Redundancy Mode Option

Oct 31, 2012

Why rpr is the only available redundancy mode option available to me.  I'm running a 4507R+E with twin SUP7-E's.
Abbreviated show ver Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.03.01.SG RELEASE SOFTWARE (fc2)Technical Support: [URL]/techsupportCopyright (c) 1986-2012 by Cisco Systems, Inc.Compiled Sun 26-Aug-12 13:45 by prod_rel_team
ROM: 15.0(1r)SG2gp08401 uptime is 6 weeks, 6 days, 4 hours, 59 minutesUptime for this control processor is 6 weeks, 3 days, 2 hours, 21 minutesSystem returned to ROM by RPR SwitchoverSystem image file is "bootflash:/cat4500e-universalk9.SPA.03.03.01.SG.151-1.SG1.bin"Jawa Revision 7, Snowtrooper Revision 0x0.0x1C


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Cisco Switching/Routing :: RFC 951 Why DHCP Option Has Magic Cookie

Oct 27, 2011

In RFC 951, the format of BOOTP packet was legislated, but the vendor information was not legislated in this document,  so the authors of this document had described that :"If the 'vend' field is used, it is recommended that a 4 byte 'magic number' be the first item within 'vend'.  This lets a server determine what kind of information it is seeing in this field. "
I think it meant that the format of vendor information wasn't fixed in RFC 951, and any vendor can legislate a new format of vendor information by itself. And the value in "magic cookie" can be set by any vendor.But in RFC 2131, the format of DHCP packet was legislated, and the "magic cooke" was fixed to values 99, 130, 83 and 99, I think it meant that the format of option information in DHCP packet was fixed absolutely and any vendor can't legislate a new format by itself.
Since the format of option information in DHCP packet was fixed absolutely, why the network device needs "magic cookie" to  identify the mode in which the succeeding data is to be interpreted ?  I think the magic cookie is not useful in DHCP packet because the format of option information is fixed. In other words, there is only one format of option information forever.

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Cisco Switching/Routing :: N7000 Inter-AS L3VPN Option B

Nov 29, 2012

I ran into problem with design that was prepared for Catalyst 6500, but in the meantime infrastructure got upgraded to Nexus. I have two datacenters connected with 1Gbit line (point-point), both ends of this circuit are N7K. There are few segments (like LAN, DMZ, PUBLIC) in separate VRFs in each DC and intention was to carry over these segments between locations using VPNv4 exchange via BGP. Each location have its own AS number and IPv4 BGP session is running between them (for global routing table at the moment). I tried to add VPNv4 to that peering session, but got message it is not supported in NX-OS for eBGP. Tried to find some more info about such limitation, but failed.
Before I start explore other options like Option A (creating subinterfaces per VRF and running separate IPv4 BGP session in each).

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Cisco Switching/Routing :: 2960S Multicast Routing

Jan 17, 2012

while i am configuring a port on switch .The switch reloads.After reload the show version says,System returned to ROM by bus error at PC 0x458F6C, address 0x0,show version from the effected switch is,Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(58)SE2, RELEASE SOFTWARE (fc1).

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Cisco Switching/Routing :: STP Between 2960S And SG300

Dec 8, 2011

I am currently having an issue with connecting a Catalyst 2960-S switch to a Small Business SG300 switch. When I connect them they are unable to form a link. When I do a show spanning-tree it says the mst link is in dispute.

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Cisco Switching/Routing :: 2960S QoS For VoIP?

Mar 25, 2012

I read some papers about QoS. The thing is that I have to implement 30 switches with QoS to connect to a lot of Cisco IP phones. The switches are Cisco 2960S with code image "C2960S Software (C2960S-UNIVERSALK9-M), Version 12.2(55)SE3". Should I use autoQoS feature or manually configure them?. How should I treat uplinks between access switchs and core/distribution? I have a lot of doubts regarding queueing, because all the info I had read its for another model/image.

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Cisco Switching/Routing :: Mix 10G And 1G Uplinks On 2960s?

May 16, 2013

I'm looking at the WS-C2960S-48TD-L and have a question about the uplink ports. Is it possible to mix 10G on one uplink and 1G on the other?  The datasheet says 2x10G SFP+, 2x1G SFP so I am thinking mixing is not possible.

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Cisco Switching/Routing :: 6500 - Changing LACP Loadbalancing Option

Oct 30, 2012

we have 6500 series switches by default all port channel loadbalancing is src-dst-ip.Now we have a requirement to change LACP load balance method to src-dst-port.
1) If we change LACP loadbalance method whar are the effects we are going have on our core network and all the existing servers

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Cisco Switching/Routing :: Can RPS2300 Support 2960S

Aug 18, 2012

When using dynamic configuration tools, if I choose 2960 (not 2960s), I have the option to choose RPS2300 as redundant power, but when I choose 2960s, I cannot choose RPS2300. However, in a document describe both 2960 and 2960s, it said that RPS2300 can be used. Does RPS2300 support 2960S?

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Cisco Switching/Routing :: 2960S QoS Configuration Not Work

Dec 20, 2012

Recently I'm working with my client to setup their network and he want me to limit user access internet bandwidth to 2 Mbps and the topology show below.Users ---> Switch ---> NAT Router ---> (int gi1/0/24 - qos apply)  Edge Switch ---> INTERNET ROUTER (12Mbps) --->> INTERNET,This is my configuration, but it doesn't work, the end user still able to get more than 2Mbps internet speed.Access-list 100 permit ip any any dscp default,class-map match-all QoS_Floor_Limit, match access-group 100.

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Cisco Switching/Routing :: Stack 4900M With 2960S?

Mar 11, 2013

I would like if is possible to stack a Cisco 4900M with a 2960S. I know it is not the most common situation but i need it.

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Cisco Switching/Routing :: 2960S MAC Address Control

Feb 20, 2013

I would like to enable port security to hardcode the MAC address on the ethernet switch. There are 5 ethernet ports in the same ethernet switch to be assigned for one person (one note book), e.g. port 5, 6, 15, 16 and 23. The model of ethernet switch is cisco 2960S and one MAC address is configured on 2960S.
1. Does 2960S support this requirement to allow input the same MAC address to 5 different port?

2. If yes, can ethernet switch "smart" enough to forward the packages to "active" ethernet port which is connected to notebook and the rest of four ports are inactive.

3. if no, any solution or any work around to achieve this requirement 

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Cisco Switching/Routing :: 2960S / LAN Design Using 10G EtherChannels?

May 11, 2011

We are designing a LAN Network for ourselves.The proposed design is as follows:
4 x 2960S switches in a Stack   Access-Stack-I 4 x 2960S-PoE switches in a second Stack Access-Stack-II
2 x 3750X switches in a Stack   Core-Stack
Now I would like to connect it in the following manner ?First,I would like to use EtherChannel using the 10Gig LinksSecondly, I would like to use Cross-Stack EtherChanel too.I have given a graphical illustration of the connectivity Now my Qs: a) Will the 2960S supports EtherChannel using the 10G links and the 3750X too... b) Does the proposed solution will work... or It will have any problems.

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Cisco Switching/Routing :: 2960S Cannot See VLAN100 Traffic On SW1

Jan 29, 2013

I have two switches (2960S's) both with IP Phones on VLAN100..We need to monitor voice traffic via a monitor port on SW1 of all VLAN100 traffic on both switches.The following is what we have configured, but we cannot see VLAN100 traffic on SW1
According to Cisco doco you cannot have a SPAN and RSPAN on the same session, however since these are two sessions on SW1, I would have thought it to be OK.

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Cisco Switching/Routing :: 2960s / Add One More Switch In Stack?

Apr 29, 2013

I have a running setup having 2 Cisco 2960s 24 TS switch with Stack configuration. Now I want to add one more same Cisco switch. My questions are:-
1) How can I do this...(Should follow the same process as I did before.

2) Could I do this without impacting the service. i.e. without rebooting the switch.

3) What should be the connection archiecture as of now since there is two switch so it is connected 1 -1 and 2-2. but for 3 switch should we require to change the connectivity.

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Cisco Switching/Routing :: Dscp Marking In 2960S

Jul 21, 2012

i did on cisco 2960S switch at user ingress interface. but the marking is not showing in show policy-map interface gig 1/0/10 interface and ACL is not showing any match.
I also had a config reference from 2960S cisco guide.
access-list 103 permit tcp any any eq 80
access-list 104 permit tcp any any eq 23
access-list 105 permit icmp host any
class-map IN_HTTP
match access-group 103

class-map IN_TELNET
match access-group 104(code)

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Cisco Switching/Routing :: High CPU Utilization On 2960S?

Feb 8, 2011

We have seen high CPU utilization on some Cisco switches of type 2960S. Also we got info, that applications are running with poor performance or with interruption.Following IOS is loaded: C2960s-universalk9-mz.122.55.SE

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Cisco Switching/Routing :: Dynamic Bandwidth On A 2960S?

Dec 20, 2012

They have a /28 wan adress coming from ISP, that gives out 100Mbps, going to a Cisco 2960S switch (ver. 12.2) the switch is only holding 1 vlan. Connected to the 2960 are 3 firewalls/routers from other manifactors, each creating their own network. The customer wishes for a solution where each final FW/router gets minimum 33% and maximum 100% of the bandwidth, depending on how much each final Fw/router are in use.

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Cisco Switching/Routing :: Stack 4900M With 2960S?

Mar 11, 2013

I would like to know if i can and how stack a Cisco 4900M with a 2960S. I know it's not the most common but i need it.

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Cisco Switching/Routing :: Information About PoE Of Switch 2960S

Jan 21, 2013

I use the Switch 2960S support PoE and 10 access points cisco.I have one more question:
-- If all 10 access points cisco use copper cable to connect to 2960S, 5 access points use power adapter and 5 access points use power from Switch. How Switch 2960S will provide power for 10 AP or switch 2960S will understand and only provide power for 5 APs?

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Cisco Switching/Routing :: Stack 2960s Not Full

May 7, 2013

I have 4 switchs 2960s in stack, but this not full ring. [code]the interface stack 1 for switch 1 is down and interface stack 2 for switch 4 is down.I do  insert this command "switch 1 stack port 1 enabled" but interface are not up.

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Cisco Switching/Routing :: C3560G-48 - IOS Version Option Or Not Supported On Hardware Platform

Feb 6, 2012

We have 2 x C6506E and 2 x C3560-48's, they are all interconnected via port channels at 2Gb per channel. The 6506's are running CEF but the 3560's are not (The 3560's carry all our server traffic).When I do a show CEF on the 3560's it says %IPv4 CEF not running. There does not appear to be a global command to enable CEF on these switches.Is this an IOS version option or is not supported on the hardware platform?

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Cisco Switching/Routing :: 4507 - Dot1q Encapsulation Option Not Showing Up Under Interface

Jun 9, 2012

I am trying to configure a 4507 R chassis with Dual SUP but i cannot see teh switchpot mode trunk encapsulation dot1q?
I have typed:
interface GigabitEthernet5/1
description DOWNLINK toxxxxxx
switchport mode trunk
channel-group 11 mode on
I have have searched all other commands and sub-commands but could only find dot1q-tunnel which I beleive is for QINQ or some QoS featues and lot for L2 encapsulations?
the puzzling is:
XXX-Core4507#sh int gi5/1 trunk
Port        Mode             Encapsulation  Status        Native vlan
Gi5/1       off              802.1q         notrnk-bndl   1
when I connect the dostribution switch a 3507 to this int gi 5/1, both interfaces do come up?

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Cisco Switching/Routing :: 3750x Remove Stacking Option On Sunday For Testing

May 2, 2013

is it easy to remove the 3750x stacking?  i'd like to test one of them on a sunday and keep the other one on production.  it's just two stack of 3750x, is it hard and do i really need to remove the cables on the back?
basically i need to put a different config for my testing, i gues i need to remove the cables right?  and put it back on the stack before monday.

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