Cisco Switching/Routing :: 4500 Rebooted When Creating L3 VLAN?

May 20, 2013

We have observed WS-C4507R-E got rebooted while creating the L3 VLAN ( while No shut).Is there any known bug for below IOS ?cat4500-entservicesk9-mz.122-40.SG.bin,

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Cisco Switching/Routing :: Documentation Of Catalyst 4500-X For Creating VSS And MEC

Mar 14, 2013

I was reading the documentation of the Catalyst 4500-X for creating VSS and MEC (multichassis etherchannel).In the VSS specific part, it's written"Cisco Release IOS XE 3.4.0SG does not support Layer 3 MEC".

Can I still use VlanX interfaces ad route through them?In my setup I only have IP addresses assigned to vlanX interfaces (with some VRF-lite magic)[code] Does that sentence only mean that I can't have IP assigned directly to the MEC?

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Cisco Switching/Routing :: Creating A VLAN On 2800

Nov 20, 2011

I have a problem to create a VLAN with a Cisco 2801.,I need to have base ports FastEthernet 0 / 0 and FastEthernet 0 / 1, in the same VLAN.
Basically I'm trying to switch access redundacion, now I have redundant switches in which I have the servers, but if one of these switches fails, and,coincidentally is where I have connected the router, the server runs out of internet connection.,I idea is to connect the FastEthernet 0 / 0 to a switch, and FastEthernet 0 / 1, to the other switch,but I managed to have these two ports in the same vlan, in order to have a unique IP for both FastEthernet ports,As I can do this?. do is a lot of documents using the switchport command, but this command is not available in my router, I tried different IOS, and nothing.,currently I have the following IOS: c2801-adventerprisek9-mz.124-24.T6.bin

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Cisco Switching/Routing :: SG200 / 3550 - Creating VLAN And Isolating PC On Network

Feb 12, 2013

I was given a task of creating a vlan and isolating one pc to access an internal website ( on a specific port (port 8080)The pc is connected in the following manner:

PC--> HP Switch --> Cisco Small Business SG200 switch --> 3550 Catalyst 1, 3550 Catalyst 2 and 3550 Catalyst 3.

I have created a vlan 110 on the Main 3550 Catalyst switch and successfully added the pc to that vlan.However, that PC must be able to access the internet and an internal website on port 8080.I have placed an access-list on the main 3550 catalyst switch which is connected to our router as below:

Client ip address:
VLAN 110:
access-list 110 permit tcp host host eq 8080access-list 110 permit icmp host anyaccess-list 110 deny ip ? I was unable to access the webserver even after many attempts.

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Cisco Switching/Routing :: 4500 VLAN Administratively Down

Dec 10, 2012

read the posts regarding vlans that are administratively down, they suggested that they are down if no ports are assigned to them, however I do have a switchport assigned, and the interface is still down. This is on the vtp server and on the clients. The vlan is not listed when issuing show vlan brief. Other vlans configured in a similar way do show and their interfaces are up. These are two Catalyst 4948-10G.Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500-IPBASEK9-M), Version 12.2(53)SG5, RELEASE SOFTWARE (fc1).

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Cisco Switching/Routing :: Create New VLAN On 4500?

Jan 24, 2012

I have an in production x2 4500's which I would like to add a new vlan and IP address to.

Sample config...
interface Vlan65
ip address
no ip redirects
no ip unreachables
no ip proxy-arp
standby 65 ip
standby 65 timers 1 3
standby 65 preempt delay minimum 120

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Cisco Switching/Routing :: 4500 - Enabling DHCP Snooping On 1 VLan?

Nov 24, 2011

I got some problem with  enabling dhcp snooping on 4500 (cat4500e-lanbasek9-mz.122-54.SG.bin) the topology is as below: dhcp snooping enabled only on CORE (with interface trusted to dhcp server)the problem is that I put these 2 commands

ip dhcp snooping
ip dhcp snooping vlan 1
but it is not enabled on any vlan
SW-CORE#sh ip dhcp snooping
Switch DHCP snooping is enabled
DHCP snooping is configured on following VLANs:
DHCP snooping is operational on following VLANs:

On B1 if I turn it on there is a "1" in the section " DHCP snooping is configured on following VLANs:" but on core no.As you can see I did put the trusted on the interface in the direction to the dhcp.First I thought it can be a problem with option 82, I've read a lot about the issues with that, but the problem would be explicable if the client did receive IP address, but it does.

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Cisco Switching/Routing :: Nexus 5010 Rebooted Itself?

Feb 9, 2013

Our Data Center Switch (5010) rebooted itself today, underneath the captured screen
Broadcast message from root (console) (Sun Feb 10 14:22:41 2013):
The system is going down for reboot NOW! 
NX5010-1# sh system reset-reason
----- reset reason for Supervisor-module 1 (from Supervisor in slot 1) ---
1) At 740938 usecs after Sun Feb 10 14:22:41 2013
    Reason: Reset triggered due to HA policy of Reset
    Service: nohms hap reset
    Version: 5.0(2)N1(1)


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Cisco Switching/Routing :: 3750 Get Rebooted And Now SFP Module Is Not Working

Mar 19, 2012

In my Cisco 3750 get rebooted and now the SFP module is not working.
It showing the following error message.
05:13:22: %PHY-4-CHECK_SUM_FAILED: SFP EEPROM data check sum failed for SFP inte
rface Gi1/0/26 
05:13:22: %GBIC_SECURITY_CRYPT-4-ID_MISMATCH: Identification check failed for GB
IC in port Gi1/0/26
What is the error message indicating and what is the solution for this.

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Cisco Switching/Routing :: Switch 3750 Of Stack Rebooted With No Reason

Oct 2, 2012

One switch of our stack of 8 3750 have reboot with no reason. Nobody was in the room server when it appears et there was'nt any electrical problem at this moment.

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Cisco Switching/Routing :: C6513 Module(ACE) Got Rebooted - Logs Attached

Feb 22, 2010

Our customer is having C6513 running with 12.2(18)SXF15a . One of the module (ACE20-MOD-K9) got rebooted with following error:
Feb 22 10:41:41.155 GMT: %OIR-SP-3-PWRCYCLE: Card in module 6, is being power-cycled off (Reset - Module Reloaded During Download)Feb 22 10:41:41.183 GMT: %C6KPWR-SP-4-DISABLED: power to module in slot 6 set off (Reset - Module Reloaded During Download)Feb 22 10:41:53.686 GMT: %OIR-SP-3-PWRCYCLE: Card in module 6, is being power-cycled off (Module not responding to Keep Alive polling)Feb 22 10:41:53.686 GMT: %C6KPWR-SP-4-DISABLED: power to module in slot 6 set off (Module not responding to Keep Alive polling)


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Cisco Switching/Routing :: 3750 Router Lost Power And Rebooted

May 14, 2012

I am new to this and have ran into some problems. I butilt up my router I was able from the rom> prompt to get my router to boot from SLOT0:xxxxx

Then I did the copy command copy slot0:xxxxxxx bootflash:xxxxxxxMy router starts up fine. I did all my configurations and did my copy run start when I was done. As this is what I do on my 3750s.
My router lost power and rebooted and I lost everything it did not boot up to my last configuration.How do I save my configurations when I am done ? How do I get it to boot from that configuration every time?

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Cisco Switching/Routing :: Cannot Ping After Creating VPN

Apr 8, 2013

I could not ping and access internet after creating the VPN. Below is my setup and router configuration: [code] From the router 1941, i could ping up to but not up to Since i cannot ping, i suppose i cannot ping I am sure is there as i use another PC which is connected directed to the office network instead of through the router 1941, it could ping your info, the g0/1/0 is connected to the PC while g0/1 is connected to the office network.

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Cisco WAN :: Creating Vlan On ASR 1006?

Nov 21, 2011

New to Cisco devices and have had an ASR dropped in my lap.Running ASR1000-RP2 with System image file: asr1000rp2-advipservicesk9.03.03.00.S.151-2.S.bin Show Vlans returns: No Virtual LANs configured Router(config)#interface vlan?

  <1-4095>   Vlan interface number
But when I try an assign a Vlan number I get % Unrecognized command, or % Incomplete command

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Cisco Switches :: ESW 520 - Creating A VLAN

Dec 8, 2010

we have two Catalyst Express 500 switches and a ESW 520 just purchased. the VLAN on the other two is 2. how do I change the Default to be 2 instead of 100 in the ESW Switch.

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Cisco Switching/Routing :: 871 Creating Multiple Static NAT

Mar 11, 2012

I am trying to configure a Cisco 871 router.I have 3 servers on my network that need static public IPs but also still need to communicate on the local network.
I have given my WAN interface the first IP in the block and set up PAT for the rest of the computers on the network which is working fine. Next I set up static NAT rules for the servers translating 3 of the remaining public IPs to the internal addresses of the servers.
I can access those servers internally using the public IPs but not from outside the network. A tracroute from outside the network gets dropped when it gets to my ISP.
I've never configured more than one static ip for a network before and i know i've just missed a step here. Do I also need to set up static routes? Will that update the next hop's routing table?

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Creating VLAN's With Public Ips On 3750G

Mar 2, 2013

I'm creating 3 vlans, one private ip addresses and the two for two blocks of public ips. After creating them devices on the same network are able to talk to each other on the private IP but not on the public ips.

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Cisco Switching/Routing :: Creating VPC On Single Nexus 7010?

Jan 6, 2013

I'm looking to see if it is possible to run a vPC between to vDC's on a single 7010?  We have a Production setup that runs dual 7010's with vPC's between the chassis but in our lab we only have a single 7010 with a 32 port 10gig module.  I was thinking that maybe we could create 4 vDC's on the 7010 and run a vPC between the vDC's.

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Cisco WAN :: 3560v2 - Configuring Passwords / Creating VLan

Apr 27, 2012

I just procured Cisco 3560V2- 48PS-S i would like to know how to set it up from scratch:

1. configuring passwords: enable and privilege
2. Creat Vlan , such that systems connected to the Vlan can connect to internet.
3. enable routing protocols
4. How do i use the switch as a default gateway for the systems on the vlan
5. how do i make sure the desktops connected to the switch are browsing the internet.

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Cisco Switching/Routing :: Creating A Span Port On Router 3640

Oct 1, 2012

i am running c3640-is-mz.124-21.bin on a cisco router 3640. i am trying to create a monitor session in the CLI and everytime i type the command Router(config)#monitor session 1 interface ethernet2/1 % Invalid input detected at '^' marker. Router(config)#monitor session 1 interface ethernet2/1 ^% Invalid input detected at '^' marker. i get the error invalid input ?

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Cisco Switching/Routing :: 3560 / Creating Extended VLans And Subinterface?

Jan 24, 2013

We have a 3560 switch running IOS universalk9-mz.150-1.SE3.bin.Recently, we saw two problems with this switch:-
1. if we try to enable subinterface on any routed interface , for eg. gig1/1, it says invalid input detected. It doesnt accept encapsulation command also.   Following was done to enable subinterface: 

   int gig1/1
  no ip address 
  int gig1/1.2000
  ip address
under the gi1/1.2000 subinterface, it doesnt present the option of ip address.
2. we created a layer 2 vlan 2000 like:   vlan 2000 When we do an exit after creating this vlan , it gives following error:-
%SW_VLAN-4-VLAN_CREATE_FAIL: Failed to create VLANs 2000: extended VLAN(s) not allowed in current VTP mode

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Cisco Switches :: Linksys SPS224 / Creating VLAN Through SNMP

May 30, 2011

I have Linksys SPS224Trying to create VLAN through SNMP. Issueing the string to create VLAN ID=100 with name "VLAN100"

snmpset -c private -v2c . s VLAN100 . i 4
It reports
Error in packet.
Reason: (genError) A general failure occured
Failed object: iso.
In same time changing the name of existing vlan snmpset -c private -v2c . s VLAN23 and even deleting the existing vlan snmpset -c private -v2c . i 6 are successful.
How can I create new vlan through SNMP?

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Cisco Switching/Routing :: Creating Stack Of 2960s From Single Live Switch

Sep 23, 2012

I have a live 28port Catalyst 2960S switch. By live I mean that there is an essential piece of equipment plugged into this switch that can suffer little to no downtime. Over the course of time the number of devices patched into this location has increased to exceed the 24 ports available and we have had to resort to adding unmanaged switches to fill the need. We have acquired an additional 2960 & stacking modules that I would like to stack together, keeping the existing switch as the master. It is my understanding that the stacking modules are hot-swappable and that this member switch can be added without bringing the master switch down, thus creating zero down time for the financial server that is connected.
The steps I believe that need to be followed are as such: write mem to existing switch and backup to our TFTP serverinstall the stack module in the existing (while powered up) and new (while powered down)place the 2 redundant FlexStack link cables on both switchesthen simply power the member switch on After boot the member switch will get it's OS and configuration from the master and I can begin moving CAT5 cables from the unmanaged switches to the stack.

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Cisco Switching/Routing :: 3560 Possible To Create Vlan Inside Transport Vlan?

Jan 10, 2012

Between our hosting and a customer we have an extended vlan, traveling on a fiber, between two cisco 3560 switches.The thing is, that we want to create one or more vlans inside that extended vlan, in some way if possible?

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Cisco Switching/Routing :: 3750 - Extending VLAN To Remote Switch That Already Has VLAN ID In Use

Jan 10, 2013

I have two networks at two sites with a dot1q trunk between the two L3 switches at both sites (no routers involved)
SITE A - Cisco 3750 L3 - VLAN ID 50
SITE B - Cisco 3750 L3 - VLAN ID 50
I would like to extend the SITE A VLAN to SITE B so that I can move hosts from SITE A to SITE B without needing to change their IP address but the vlan ID is already in use. Obviously the easy solution is to change the VLAN ID for one or other of the sites but both sites contain hosts that run 24/7. Is there a way to join two VLANs with different IDs together.So for example I create a new VLAN 60 at SITE B and associate it with VLAN 50 at SITE A.

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Cisco Switching/Routing :: Route Data From Vlan 10 To Vlan 20 On 2960s?

Mar 31, 2013

i need to solves this little problem on 2960S lan BASE but i dont know if it is possible.
Uplink port config for gi 1/0/28 is:
switchport mode trunk
switchport trunk alloved vlan 10,11
but on interface gi 1/0/1 i want to have data from vlan 10 tagged as VLAN 20.
At this time i have solved this issue very primitively
I have set up gi 1/0/2 as int mode acces, acces vlan 20 and i have connected gi 1/0/2 with gi 1/0/3 with eth cable. int gi 1/0/3 is switchpor mode acces, switchport acces vlan 10

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Cisco LAN :: 6509-e Switch And IDF Closets Have 3750 - Creating Isolated VLan

May 6, 2012

My core switch is a 6509-e and my IDF closets have 3750's.I have a couple of vlans currently setup, that can communicate with each other.VTP is setup Client/Server where as my core is Server, all IDF's are Client.
What i'm trying to do is create an isolated VLAN.  I want to setup a DHCP scope and use helper address.  When i plug in a client to that VLAN, i want it to get an IP, but not have any other network access.
Is this possible to do without switching to Transparent mode? If not - what reprocussions will i see by switching to transparent mode?

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Cisco Switching/Routing :: 3750G / VLAN 1 Is The Only VLAN And Its Disabled

Sep 16, 2012

I have a 3750G switch in my production network that only has VLAN 1 on it. All ports are in a default state and VLAN 1 is disabled. The switch is passing traffic but shouldn't having the default VLAN shut down cause the ports not to pass traffic? If I start to create VLANs will that cause the switch to stop passing traffic?

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Cisco Switching/Routing :: L2tpv3 Vlan-to-vlan Tunnel On 890

Jun 13, 2011

I am trying to setup a L2tpv3 VLAN-to-VLAN tunnel.My setup has two Cisco 890 router with Cisco IOS Software version 15.0(1) M4. These routers are connected directly on FastEthernet port 8.
One linux machine is connected on FastEthernet port 0 on each router. The two linux machines are on same vlan. I am trying to establish a vlan-to-vlan tunnel between the routers and send traffic between the linux machines.
I followed the case study 11.4 from [URL] and configured the l2tp-class and pseudowire-class. However, the vlan interface configuration is different on 890 router.
I configured a vlan interface as follows.

(config)#vlan 200
 (config)# interface FastEthernet 0
#switchport access vlan 200
(config)# interface vlan 200
I don't see the 'xconnect' command in this context. What's wrong with my configuration? 

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Cisco Switching/Routing :: Low Bandwidth On 3750 From Vlan To Vlan?

Nov 20, 2012

We have a low bandwith (15-20 Mbit/s) to the ASA from our Client vlan. If i connect the Client to the same vlan as the ASA is, the bandwith (90 Mbit/s) is good.
Here are the Layer 3 Design:
Client     ->     vlan 2 - Switch - vlan 7     ->     vlan 1 - ASA 5505     ->     ISP
The Layer 2 Design:
Client     ->     Gig2/0/13 - Switch - Gig4/0/43     ->     Eth0/1 ASA5505     ->     ISP
IP Address:
I assuming the switch has a problem with routing ?It is a stacked Switch with following members:

switch 1 provision ws-c3750g-12sswitch 2 provision ws-c3750g-24tsswitch 3 provision ws-c3750g-24tsswitch 4 provision ws-c3750x-48
And we have following error message in the log from the switch:


One or more specific prefixes could not be programmed into TCAM and are being covered by a less specific prefix, and the packets may be software forwarded I first get the idea that the switch is overloaded with router traffic. Thats why i assuming i have to check the sdm templates, but i'm not sure if this resolves the issue. 
Here are the relevant config:
ASA Interface on the Switch:

interface GigabitEthernet4/0/43description ASA-inside LANswitchport access vlan 7switchport mode accessspanning-tree portfast
Client Interface on the Switch:

interface GigabitEthernet3/0/1switchport access vlan 2switchport mode accessswitchport port-securityswitchport port-security aging time 2switchport port-security violation restrictswitchport port-security aging type inactivitymacro description cisco-desktopspanning-tree portfastspanning-tree bpduguard enable


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Cisco Switching/Routing :: Cat 4500-X Does PBR In Hardware?

Mar 6, 2013

I need to know if Catalyst 4500-X does PBR in hardware?

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Cisco Switching/Routing :: Does 4500 Support VSS?

Feb 28, 2012

Does the 4500 support VSS (Virtual Switching System) ? On the official product overview page it says: 1.6 Terabits capacity with Virtual Switching System (hardware-ready)What means Hardware ready ? Does it mean that it supports VSS in the same manner as the 6500 ? The reason I'm asking this question is that I didn't find any info on the Internet about this. We would like to upgrade our network by interconnecting the 2 sites with Layer 2 redundant links (Layer 2 extension), but I'd like to use the both links in a load-balancing manner, which can be a real pain in the *** with STP. The choice is between 4500 and 3750 stackable  core switches. The 6500s are very expensive.

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Cisco Switching/Routing :: 4500 SUP-7LE Mixing 10G And 1G?

Apr 3, 2013

question on 4500 SUP-7LE, this documentation is not 100% clear:
When in single sup mode, can I have the following combinations?
1 SFP+ and 1 SFP << pretty sure this is supported
1 SFP+ and 2 SFP << think it's supported
1 SFP+ and 3 SFP << doubtful
2 SFP+ and 2 SFP << think it's supported
3 SFP+ and 1 SFP << doubtful

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