Cisco Switching/Routing :: Port Security Dynamic Configuration On Catalyst 3560xPOE

Oct 2, 2012

I have connected a 10BaseT device to a CISCO Catalyst 3560xPOE switch with dynamic port security.  All seems to work fine when the distance between the two devices is closer then 200ft.  When I connect to 10BaseT devices farther out near 300ft the response from the attached device is lost. It works ok on unmanaged switches at the longer distance. Is there a minimum response time from attached devices for dynamic port security to work properly?  Is there any other explanation why it would work on cheaper switches, but not on the Port Secured Switch?

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Cisco Switching/Routing :: Catalyst 3500 Fx Port Configuration

Jun 12, 2013

I am connecting two catalyst 3500 XL switches via fiber fx ports for layer 2 connectivity. Do I need to configure anything in the IOS or do I just plug in the fiber?
What needs to be configured?

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Cisco Switching/Routing :: Catalyst 3546 XL / Switchport Port-security Command Not Available

Oct 26, 2011

Im trying to follow along documentation i see via train single videos and some online resources. I am trying to enable port security.I have a Catalyst 3546 XL when i type in "rtr1# switchport ?""port-security" is not only of the options to choose from.   I have already set this as an access port.

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Cisco Switching/Routing :: Catalyst 3550 Switch - Dynamic QoS Setup

Mar 28, 2012

I live in a condo building that uses 3 Cisco Catalyst 3550 switches connected to a Comcast router with 100 Mbps download. Currently we regulate bandwidth by providing each user with 3 Mbps download. Even if only two people are active they still only get 3 Mbps download. I would like to set it up so if two people are using they each get 50 Mbps; a sort of 'dynamic qos. Is this possible with these switches? Would we have to purchase a Cisco router in order to provide this feature?

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Cisco Security :: ASA 5505 8.41 Dynamic NAT / Static Configuration

Apr 17, 2011

I'm having some issues configuring NAT statements on my ASA5505 which has recently been upgraded to 8.41.
I have a single dynamic IP on the outside interface of the ASA and would like all internal hosts to NAT/PAT to it. In addition, I would like to have several ports 'forwarded' to internal hosts, one of which is TCP/4343. With the current configuration all hosts are NATing to the external interface properly but the service running on TCP/4343 is not accessible from the outside. See command output below:
"sh run object" output:
object network DrJones host network LAN- subnet
"sh run nat" output:
object network DrJones nat (inside,outside) static interface service tcp 4343 4343object network LAN- nat (inside,outside) dynamic interface
"sh run access-list" output:
access-list inside_access_in extended permit ip anyaccess-list outside_access_in extended permit icmp any any echo-replyaccess-list outside_access_in extended permit tcp any interface outside eq 4343

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Cisco Switching/Routing :: 1921 - Dynamic Port Forwarding With PAT

Feb 29, 2012

How can I implement this with Zone-based Firewall on my 1921?
I'm looking for something as simple as the port triggering function on a Linksys or Netgear router.

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Cisco Switching/Routing :: Catalyst 6500 - DAI Configuration

Apr 26, 2012

Any step-by-step configuration guide of how to enable DAI on Cisco Catalyst 6500 Series Switches.

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Cisco Switching/Routing :: Configuration PBR On Catalyst 4503

Mar 4, 2012

i'm performing configuration PBR on catalyst 4503, but it doesn't work. [code]

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Cisco Switching/Routing :: Catalyst 2960G Vlan Configuration?

Oct 24, 2011

I have got a catalyst cisco 2960G series switch and via this switch I want to creat serveral vlans. I am getting a dhcp IP from a router and I want to setup my own vlan networks.
I plugged in the Ethernet cable that came from the dhcp router to port 16 of the cisco switch and configured the ports 1,2 and 3 for vlan 1, 2 and 3
the dhcp router has given me this IP defautl gateway is :
when I plug in a PC to port 1 or 2 of the cisco switch I still receiving the IP from range 192.168.10.* but not from the range that I configured for the vlan 1 or 2.
Below is my startup configuration:
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id


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Cisco Switching/Routing :: SPAN Configuration In Catalyst 3750

Dec 31, 2011

I have CISCO catalyst with VLANs (VLAN ID 33, 36, 40-53) configured. I need to configure port mirroring in Switch 3750 for NAC (Network Access Control).  I need to Monitor all the VLANs. Here is the SPAN configuration of switch: [code] Monitor session 1 source vlan 33 , 36 , 40 – 53.Monitor Session 1 destination interface fa 1/0/8  (here I am not able to set encapsulation dot1q ) because the error occurred saying %one or more dest port do not support the encapsulation%.

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Cisco Switching/Routing :: WOL Configuration On L3 Catalyst 6500 And L2 2960G?

Dec 20, 2011

I got problem with wake on LAN software.. The software unable to ON all pc's remotely if sitting under different vlan. Everything is ok if using the same vlan. Below are the network diagram & switch configuration.
Layer 3 switch Intervlan routing configuration
ip forward-protocol udp 7
interface Vlan4
description vlan Client-WOL
ip address
ip access-group Deny_HTTP_Vlan1 in
ip helper-address

After configured all the switches with the above setting, the software still cannot wake all the pc's using LAN. Base on sniffing, i can't find UDP port usage by the software. Attached here with print screen from wireshark.

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Cisco Switching/Routing :: Catalyst Express 520 - Trunk Configuration?

Jul 11, 2012

I am struggling with a CE520 and its smartports stuff.I have configured the following vlans :
1- data
100 - phones
I need to bring those vlans (both of them) to a Cisco 800 router. The port of the 800 router is already configured as trunk and accepts vlan 1 and 100.The cisco 800 has both vlan 1 and 100 configured with 2 ips on different subnets, and ip routing is enable (to route between two vlans). Also, no access lists are configured.I have configured one port in the switch as role "router" and connected to the router. The other ports are all configured as phone-desktop (phone vlan 100 desktop vlan 1).If I connect a phone and manually configure an ip (the phone gets automatically vlan 100), and try to ping the phone from the router, it doesnt respond. Alse vlan 100 is protocol down.I am guessing what s the right configuration as the link between the switch and the router should be a trunk link for 1 and 100 vlans, but it looks like is transporting only vlan 1.Also changing the port role to "other" when you can specify the native vlan and another vlan, the switch doesnt accept vlan 100 as additional vlan on that link.

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Cisco Switching/Routing :: Catalyst 6500 VS-SUP2T-10G QoS Configuration

Apr 22, 2013

I am migrating services from SUP720-3B to VS-SUP2T-10G= and moving to a VSS configuration  between a pair of Cat6506 distribution layer switches. I need to enable QoS on these switches, primarily to trust dscp and also to prioritise voice traffic. The autoqos feature works for some ports but does not work on port-channel interfaces and port-channel member interfaces. How can I apply the qos settings for these interfaces in line with what auto qos would normally provide. My line cards are as follows:
Civic_6506VSS#sho mod
Mod Ports Card Type                              Model              Serial No.
--- ----- -------------------------------------- ------------------ -----------
1    4  CEF720 4 port 10-Gigabit Ethernet      WS-X6704-10GE   


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Cisco Switching/Routing :: Catalyst 3750 Failover Configuration

Jul 16, 2012

Our servers are hosted at the Main site, site office A access to the Main site for Internet and servers. We are thinking NextG to take over when the link between sites goes down.
To start with, what is the configuration for 3750 at Site A and the Main site:

1) Trunking for both switches

2) Routing

3) the automatic failover configuration for the switch at Site A.

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Cisco Switching/Routing :: WCCP Configuration On Catalyst 3750G?

Jul 5, 2010

I have a WCCP Configuration on a Catalyst 3750G and a IronPort Webappliance. I have configured this situation many times before with cisco asa and ironport wsa, but with a switch, this is my first time.
VLAN 147 is a transportation vlan between the cisco switch and a hp coreswitch with the clients and servers behind the hp coreswitch.
VLAN 147 IP Address of the Catalyst is
IP of the IronPort Appliance is
IP of the HP Coreswitch is
Plan  is to redirect the webtraffic coming from clients and servers from the net behind the hp switch to the ironport wsa. In have configured these settings.
ip wccp web-cache group-list 15 password 7 091D1C5Aip wccp 80 redirect-list 16 group-list 15 password 7 14464058
interface GigabitEthernet1/0/22 description IRONPORT P1 BUWOG switchport access vlan 147 switchport mode access
interface Vlan115 ip address standby 10 ip standby 10 priority 90 standby 10 preempt standby 10 track Vlan115!interface Vlan147 ip address ip wccp web-cache redirect in ip wccp 80 redirect in


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Cisco Switching/Routing :: Configuration Of Catalyst Express 500 Series?

Dec 25, 2012

I was trying to configure my Catalyst Express 500 switch (PID VID: WS-CE500-24LC V01)  and i followed the step i found in a document on Cisco website but still it showed an error "Page not found" and address displayed on bar was"

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Cisco Switching/Routing :: Enabling Port Security On C4507R Shuts Down Port

Aug 13, 2012

I'm trying to enable port security on several 4507R's. When I try to configure a range of ports the switch will randomly put 1 or 2 in err-disable.  It's different every time I apply the config to the same group of ports.  However if I do them one at a time it seems to work.  But I really don't want to configure 6 fully populated switches one port at a time.   We also have a lot of 3750's and they gave me no problem using a port range. [code]

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Cisco Switching/Routing :: Catalyst 6506 Vlan-based Qos Configuration?

Feb 12, 2012

I was unable to configure vlan-based qos on Cisco IOS Software, s72033_rp Software (s72033_rp-IPSERVICESK9-M), Version 12.2(33)SXH6, RELEASE SOFTWARE (fc1) Seems to me my configuration is not working. Here is the output of the interface:
sh int G1/6 | i rate
Queueing strategy: fifo
30 second input rate 25231000 bits/sec, 4282 packets/sec
30 second output rate 46940000 bits/sec, 9257 packets/sec
And here is my configuration:
interface Vlan3
ip address
service-policy input TEST_IN_PMAP
service-policy output TEST_OUT_PMAP


Why I can't see matches in ACLs? I've double checked the direction and seems to me it is correct. I can't see matches even I configure something like this:

10 permit ip host any 
20 permit ip any host

Why my output rate is higher than 30M? Is it bacause there is no matching traffic here in ACLs? I'm absolutely shure that this host with such ip connected to this interface:

#sh arp | i
Internet           0   feed.beef.f00d  ARPA   Vlan3
#sh mac address-table |  i feed.beef.f00d
*    3  feed.beef.f00d   dynamic  Yes          0   Gi1/6

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Cisco Switching/Routing :: Catalyst 6509 - Ether Channel Configuration?

Dec 1, 2011

I came across a Catalyst 6509 switch configuration and have noticed some strange thing on the ether channel configuration side, it appears that it have interface port-channel 2 and port-channel 2A, what was that mean? its the ether channel not forming and joined together?
What wrong with the below configuration that cause it to automatic created another port-channel (2A) interface in this case?


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Cisco Switching/Routing :: Catalyst 6513 - FWSM Module Configuration

Dec 20, 2007

My company has acquired a Catalyst 6513 with a FWSM module installed on it. I have been reading lot of documentation on [URL], but still have some problems configuring the FWSM:
The 6513 has 10 SVIs configured, each of them with an IP address. These 10 SVIs are binded to 10 VLANs which I need to secure. These SVIs are used for routing all the Inter-VLAN traffic inside the switch. The documentation says it is recommended to use just one SVIs for connecting the switch to the FWSM, although you can use more than one using the command "firewall multiple-vlan-interfaces". I don't want to use this command because it seems a pretty more difficult configuration, since you have to use policy routing after using this command (or that is, at least, what documentation says).
When I try to "send" to the FWSM more than one VLAN that are configured as SVIs on the switch I get this error message:
"No more than one svi is allowed, command rejected."

If I delete the IP address of those SVIs, then I can to "send" those SVIs to the switch with no problem at all. But I need the SVIs to have IP address configured, since they are needed for routing Inter-V LAN traffic.
So, the question is: how can I route all the inter-VLAN traffic using just one SVI on the switch? Should I use the FWSM for inter-VLAN traffic routing?

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Cisco Switching/Routing :: 7900 - Port Configuration With IP Phone And PC On Same Port

Jan 15, 2013

We just installed a hosted VOIP system using Cisco 7900 series IP phones.  We are having a strange issue with a few computers where they pull DHCP information from our VOIP provider's DHCP server on the Internet and not our LAN DHCP server. 
The switchports areconfigured as: switchport mode access
My rationale behind this is that the phones would use CDP to get their VLAN info from the providers Cisco router and the PCs would just ride on the default VLAN.  But this is not the case.  Computers randomly keep getting DHCP info from the provider's router.  Do I have to use voice vlan x and make the switchports trunks?

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Cisco Switching/Routing :: SFP Port On Catalyst 2960 S?

Mar 18, 2013

I have Catalyst 2960 S (WS-C2960S-48FPS-L) Switch. I have plugged in SFP module but still interface is down and line protocol down. Is there any configuration to enable SFP module and make the interface up?
This port is connected to nexus 5 k.

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Cisco Switching/Routing :: Force Catalyst 2960 To Ignore Startup Configuration?

Feb 4, 2013

I was wondering if I can force catalyst 2960 to skip startup config stored in NVRAM and boot with no config everytime it is powered. I tried to find it on google and in cisco white papers but still no luck. I found only commands that begin with "set boot config-register ... ", but switch acts like it does not know these commands.

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Cisco Switching/Routing :: Configuration Module Supervisor Switch Catalyst 4500

Jun 4, 2012

switch catalyst 4500 with ios cat4500e-universal.SPA.03.02.00.XO.150-2.XO.bin. I need to configure modules 3 and 4 of supervision, the problem is that I need the 4-port module 3 are active but only the first turn on both the module 3 and the first port on the module 4. [code]

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Cisco Switching/Routing :: IGMP Snooping Configuration For Multicasting On Catalyst 3020

Nov 24, 2011

Our switch model is "Cisco Catalyst Blade Switch 3020 for HP" We are building HA (High Availability) Databases infrastructure.Currently, there are two nodes(hosts- servers) and two above switch for HA.
Oracle said we need to turn off the IGMP Snooping in order to use the multicasting for their interconnect communication.So my question is:
Q1> Is there any way to use Multicasting without turning off IGMP Snooping on Switch side?
Q2> If 'yes', how can we configure the switch for Multicasting ?
Oracle uses & IPs with 42000 range port for Multicasting communication.

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Cisco Switching/Routing :: Catalyst 2960 / VLAN Configuration Using MS DHCP Server

Jan 28, 2013

I am going to creat VLANs very 1st time therefore for test purpose I have following simple scnerio.I have created 2 VLANs , VLAN2 and VLAN3 on Cisco Catalyst 2960 series switch. Ports 1-12 is assigned to VLAN2 and Ports 13-24 are assiged to VLAN3. Now I have configured DHCP on Microsoft Server 2003 defining 2 scopes with following configurations.
Scope 1 for VLAN 2--- Range is to   with subnet mask= . Server IP address
( Note: Address is excluded from dhcp server Scope 1 and give to the MS server itself)
 Scope 2 for VLAN 3----Range is to with subnet mask= .
Now in Cisco 2960 series switches, under Vlan 2 and Vlan 3, I have following configurations...
interface Vlan2
ip address
ip helper-address
 interface Vlan3
ip address
ip helper-address
Now the problem is when i connect a client computer to any port from 1-12, It gets correct IP address from Scope 1 but when I connect a computer to any port from 13-24, it does not get the ip address.
Further I want to do inter VLAN comunication as well for that purpose i Have an  ISR 2900 series router. What further configuration i will have to do on router for inter vlan communication.

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Cisco Switching/Routing :: 892 When Connecting Port 0 To Catalyst It Shuts Down

Sep 3, 2008

I have a 892 router configured on fa0 with vlan1 and a catalist 3560. On catalist all ports are in access mode and vlan1. When I'm connecting port fa0 from router to catalist, the catalist port is shuted down What should I do on router on catalist to make the connection working ?

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Cisco Switching/Routing :: Why Last Port Of Two Catalyst 3560X Are Connected Together

May 22, 2012

We have two catalyst 3560X 24T-S switches connected on two separate LANs (both the networks are redundant to each other). The last port of the switches are connected together?

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Cisco Switching/Routing :: Port Mirroring On A Catalyst 3560-X?

Oct 21, 2012

I've just installed 2 of these in my workplace on a PLC network.I'm now looking to set one of the ports up as my diagnostic port and would like to be able to mirror any of the other ports to this port.I believe it is called SPAN on Cisco switches.The only reference I can find to it is configuring via Telnet which I haven't got a clue about.On my old Wiedmuller switches it was just a few clicks away.

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Cisco Switching/Routing :: Port Numbering On A Catalyst 3560 / 3750X

Apr 10, 2012

Assume I had Catalyst 3560X/3750X with 24 ports. The partnumber is WS-C3560X-24P-LI would like to how is the numbering defined if the switches have a C3KX-NM-10G installed with 4 SFP-GE-L.

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Cisco Switching/Routing :: Port Grouping On 3750 Like On Catalyst 4500?

Mar 27, 2013

On 45XX catalyst , bandwidth is allocated across six 8-port groups, providing 1 Gbps per  port group. Example  for the following line card : WS-X4448-GB-SFP

I want to know if there is the same mecanism on 3750X switches. I mean is bandwidth allocated across a group of ports like on 4500 catalyst ?

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Cisco Switching/Routing :: Catalyst 2960S - Protected Port But Allow Specific MAC?

Nov 5, 2011

We are using catalyst 2960S Lan Base IOS on Radio towers. We just bought 50 Accest points, thas are GPS synchronized. Problem is the APs need to be connected on L2-mac betwen each other. But at this time we are using port isolation on each switch (tower) by protected port function to isolate clients from each other.
My question is, is possible to specifi a Mac addresses in specific vlan thats can comunicate betwen protected ports? On tower is one Master unit and others are slave. I thing there is only 1 dirrection comunication - from master to slave.

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Cisco Switching/Routing :: Catalyst 2960 Switch Port Bandwidth Limit?

Sep 18, 2012

I want to configure switch port bandwidth limit for my Catalyst 2960-48, is there any hardware / ios limitation? can I configure it at all 48 switch ports?

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