Cisco Security :: WS-C3560X-24 Needs To Be Connected With Another Core Switch

Dec 5, 2012

I got new task moving WS-3560X24 port layer 3 core switch from one branch to be moved  to my  branch and connect WS3560 layer 3 core switch my site network. Both core switch has got 3-4 cisco 2960 switch underneath and lots of vlan offcourse. I am thinking about creating etherchannel between these two switch.

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Cisco Firewall :: ASA 5510 Connected To MPLS And LAN Via 6506-E Core Switch

Apr 19, 2011

I am attempting to install an asa 5510 at my hq.  Our MPLS network is provided by our ISP and the routers are managed by them.  They will be working with me to add the needed routes to the routers. Using version 8.4.1  That said, here is my challenge:
I am connecting the MPLS routers and WAAS device to my core switch(also performing inter-vlan routing) in VLAN 2. There are 3 connections needed for the mpls equipment and they are all in vlan 2 on my core switch.  The firewall (ASA 5510 with security plus licensing) also has an interface (outside) in vlan 2.

no nameif

configuration guides or suggest TAC as they have been a bit inconsistent with this issue thus far.  What am I missing because I cannot get to where inside interface of the firewall is pingable by the lan and the outside interface of the firewall is pingable by the lan.

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Cisco Security :: Configure FWSM Module In Core Switch 6500

Mar 9, 2007

how to configure FWSM module in cisco core switch 6500

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Cisco Switching/Routing :: 2 Internet Connection Connected To Same Core Switch 6509

Jan 25, 2012

i'm already has one internet connection is conecting directily to the Core Switch 6509, and the Switch is route any internet request with default route:
SW6509-conf)# ip route is --> Next hop for the DSL router internal IP, and it's working fine.
We have a new internet connection with another ISP/ with another DSL router, how to connect both of them to exit from the Core Switch 6509.
is it ok if i make another default route to the Next hop to the new DSL router as:
SW6509-conf)# ip route is --> Next hop for the new DSL router internal IP.

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Cisco Switching/Routing :: 6500 Ping Packet Drop From Core-Switch To Directly Connected Server

Oct 24, 2011

I have an Cisco 6500 CS and there is a Cisco Unified Communication Manger Server connected directly to the Core Switch.I tried to change duplex and speed ( fix and auto ) for both sides, but the same problem.

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Cisco Switching/Routing :: Does WS-C3560X-24P-S Switch Supports Ip Flow Export

Jan 19, 2012

Does the Cisco WS-C3560X-24P-S switch supports ip flow export?

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Cisco Security :: 3750 Core Crashes During Nessus Scan

May 24, 2011

I'm currently investigating an issue for one of our customers where one of their 3750 Core Switch Stacks crash / becomes unresponsive during a NESSUS Scan.
They've diabled DoS testing and have ensured that safe scanning is enabled.  For the test they are port scanning all of their VLANs (around 600 internal addresses).
The network consists of 2x 3750 Switch Stacks connected via fiber, edge switches connect into these cores.  Both cores are running HSRP, for VLAN gateway redundancy.
Issue Being faced is as follows:
During the scan, Core 1 becomes unreachable from Core 2.  We can telnet to Core 2 and administer as necessary.  However we cannot telnet to Core1, a console connection also fails - the switch stack is unresponsive, but  does respond to pings.
On Core 2 I've performed a show proc cpu sorted and can see the IP Input process is running at around 60% and the CPU is highly utilised.
Once Core 1 becomes unreachable the network gradually grinds to a halt, almost mimicking some sort of broadcast storm or Spanning Tree loop.
Interestingly Core 1 HSRP is still active, so the hello packets are still being sent.
The only resolution to the issue is to perform a hard reset of the Core to restore service.
Logs from core 1 show the CPU becomes fully utilised.  There is also an error logged indiciating:
%FIB-2-FIBDOWN: CEF has been disabled due to a low memory condition. It can be re-enabled by configuring "ip cef [distributed]"
Both cores are running IOS 12.2.(52) SE IPBASE.  I've attempted to reproduce the issue in the office here and although a NESSUS scan does increase switch CPU utilisation I couldn't reproduce the failure scenario.
What may be causing the 1st core to become unresponsive?  I've found some articles with regard to a 6500 switch rebooting during a NESSUS scan, and also some HP switches exhibiting similar behaviour but nothing that matches the exact scenario I'm investigating.

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Cisco Switching/Routing :: 2950 - Devices Can't Connected To Server At Core Sw

Jan 11, 2013

In my organization we have several 2950T that conected each other. We have 4 floor with each floor have 1 sw except 4th flr have 3 sw.
Main server, apps, db ( 15 units) connected to core sw at 4th flr. Currently the problem is others devices can't connected to the server at core sw. Test ping and the network to core sw is intermittent problem. When ping 100 times only 30 reply. After 10 minutes the connection restored. Ping 100 times successful. It will not having problem again until the next day. This already happen 3 days. Any command for me to use to check if port or the switch having problem? Any log i can collect

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Core Switch Getting Hanged?

Jun 6, 2011

In my Company there is a core Switch 4500 series , to which in the 1st module servers are connected and in the second module 2960 , 3750 series Switches are connected, problem is that the Utilization of Core switch is very high and the core gets hanged. the configuration of the senerio is VTP domain i.e core is Server and the rest are Clients....

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Cisco :: Connecting Servers To Core Switch?

Jul 19, 2011

there are more than 15 servers which include xen,esx,vmware,also san etc..which are connected to L3 core switch directly. And vlans are created for each.....xen,iscsi,vmware,xen,server. wanted to know is there any other technology other than directly connecting servers to core switch and assigning vlans that can be used in place?

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Cisco :: L3 Core Switch VLAN Monitoring With IPS?

Jun 10, 2012

We have a L3 core switch with multiple VLANs setup. Is there a way to place an IPS so as to monitor the traffic passing between, lets say, VLANS 1-3 and VLANs 4-10?

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Cisco :: LMS 4.0 - Core Switch Is Showing In RED Color

Aug 31, 2012

I am facing issue with LMS 4.0. The Core Switch is showing in RED color,and device type as UNKNOWN. It was working fine but some how it is showing this problem.

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Cisco :: Auto Failover Of Core Switch With Other Route

Apr 18, 2013

I want my core switch auto failover to other route if the primary route is link down it will go to the secondary route

ip route
ip route 100

if my core switch detect next-hop it will re-route and go to the for the next-hop my core switch using static route and cant support ip sla

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Cisco WAN :: 6509 - MAC Address Flapping In Core Switch

Dec 28, 2010

I am getting following error in Cisco 6509 switch.BUt there is no impact in the switch.
: %MAC_MOVE-SP-4-NOTIF: Host 0000.0c07.ac01 in vlan 694 is flapping between port Te8/1 and port Te7/1
29:33.959: %MAC_MOVE-SP-4-NOTIF: Host 0000.0c07.ac01 in vlan 269 is flapping between port Te7/1 and port Te8/1


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Cisco Wireless :: WLC5508 Link To Switch Core Down?

May 16, 2012

I tried to implement WLC5508 in my network but when I came to connect it to the switch core which is a Catalyst 4000 the link didn't get up. This switch module is a fastethernet, I wonder if that might be the problem since I also tried connecting my laptop to the WLC and the link got up.
If that might be the cause, is it possible to get WLC to 100 Mbps?

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Cisco WAN :: VPC Configuration Template With Two Core 6509 Switch

Jan 3, 2013

What is the VPC configuration template with two core 6509 switch.Pls find the attachment for Network topology.

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Cisco WAN :: Core Switch 4507R Suddenly Restarted

Apr 20, 2012

My CORE Switch 4507R Suddenly restarted (Powe is good) , and gets the business down for 30 Mts,my boss came to me and asks why it has restarted , what is the root cause of this restart, i dont have any syslog or NMS enabled in my  network to be informed

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Cisco WAN :: DHCP Configuration On Core Switch 4507R

Jul 9, 2011

DHCP configuration on CISCO core switch 4507R switch.With one vlan and multipul vlan both configuration using any ip address range.

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L3 Core Switch VLAN Traffic Monitoring With IPS

Jun 9, 2012

I have a L3 core switch with multiple VLANs setup. Is there a way to place an IPS so as to monitor the traffic passing between, lets say, VLANS 1-3 and VLANs 4-10?

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Cisco Switching/Routing :: 6500 - Power Off Core Switch?

May 31, 2012

we need to relocate our core switch 6500 with sup 720 to another bldg
what is the command to gracefully shut it down I mean power off
I was told one can just switch off the power

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Cisco :: Flash File Location In 6500 Core Switch?

Apr 18, 2013

what is location of flash file in 6500 Series switch and how can we take back of IOS image for 6500 series.

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Cisco Application :: Configure New ACE 30 Module On Top Of 6500 Core Switch

Jan 12, 2013

i have configure new ACE 30 module on top of 6500 core switch , the issues am facing whenver i want to access to https://ACE_IP and after i enter the user name and the password , it's forwared me to the follwoing page: is there anything should i configure to avoid this page ?

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Cisco Switching/Routing :: How To Configure 1 Core Switch 4500

Jun 2, 2013

i configure the uplinks as etherchannel, i configure two svi interface on core switch int vlan 51( and int vlan 50( for this two svi int i configured two dhcp pool , when any of the pc is requesting for dhcp add i am getting dhcp request failed/

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Cisco Switching/Routing :: 2960G Core Switch For 400 Users

Jun 7, 2012

I'm trying to decide what switch to use as a core for 500 users. I'm currently looking at either 2 x 3750X stacks or 2 x 4500s with dual SUPs and PSUs, both options will provide the number of switchports required without the need for additonal access layer swiches. Which switch option is best to go for here? All of our services will be located in our data centre which will be connected using 2 1000Mbps MPLS circuits. I wont need any advanced L3 features and we are not likley to scale over 450 users. Also is it ok to use the dual switch stacks or chassis to provide the collapsed core/access layer or is it best to have a dedicated core (using one of the above options with less switchports) and having a dedicated accesss layer using 2960Gs for example. Our structured cabling terminates in a single comms room so we wont need to distribute switches throughout the office.

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Cisco WAN :: Windows 7 Cannot Obtain An IP Address From 4503 Core Switch

Dec 14, 2011

we have Core-Siwtch 4503 in the main building which is connected to another Core 4503-E in another building ,, now our PCs connected to the 4503-E ,,, any XP M/C can  pick an Dhcp-ip but and M/C run Win.7 Cannot !!

action taken :
1st we try to connect our win 7 pc in the node which was connected to xp M/C ,, and it didnot take ip from the DHCP . ,, 2
2nd we ensure from the core-switch configuration and its normal with no mistake
3rd trying to use tool from Microsoft Fix-it Center whih name is ( Microsoftfixit 50475 ) which is just .msi file but the problem face us is that this tool donnot accept to run on win 7 cause its made for vista .
4th after some researchs we notic that there is some modifications have to be performed on registery by disabling the dhcp broadcast flag we did it but nothing change yet
5th now we are waiting to perform another action which is Disable the IP Helper service in win 7

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Cisco :: LMS 4.0 Manually Added Core 3750 Switch Into System

Jun 25, 2011

I am doing an evaluation of LMS 4.0.  I have loaded the system on Windows and manually added my core 3750 switch into the system.  Device availability is showing the device as available.  However, the other pollers like link utilization, error count, etc. all show that there is no data.  When I go into the poller config, the pollers for link utilization and errors show 0 devices associated and a status of "instance not found".  The CPU and availability pollers show active with my one device added.  I have verified the credentials and if I go into Inventory -> Port and module and select my 3750 I do get a list of all the interfaces and the descriptions so LMS is connecting to the switch and pulling data. 
So how do I get the pollers for link utilization and errors to start populating data?
Second question, during install I did configure the software update section and it said there was an LMS 4.0.1 available which I told it to download.  Now I have a psu_download directory and some more directories like cm, cmf, etc. but I don't see any file on what to do with them.  What do I need to do to install the new package files that were downlaoded to psu_download?

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Cisco WAN :: Multicast On 4510 Core Switch And 3750x IDF Switches

Jul 15, 2012

At our site we have a 4510 core switch and 3750x switches in our IDFs. The 3750 switches are connected to the core via DOT1Q trunks in a server client setup. We are putting in an Informacast/Berbee server witch will send pages and text to the cisco phones. We also have 1 3750 switch connecting to the core via a layer 3 port channel. If we put the Informacast server on the phones vlan would I just need to enable ip pim sparse-dense mode on that vlan only and enable multicast routing, ip multicast routing?

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Cisco Firewall :: 6509 Core Switch - How To Create DMZ Vlan

Oct 31, 2012

I need to create a DMZ Vlan.  Core switch is a 6509.  FW is an ASA5520.  Need to create a VLAN for DMZ purposes for outside facing servers.  NAT is used on ASA.

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Cisco Switching/Routing :: How To Connect Two Core Switch C4510R+E SUP 7-E

Nov 4, 2012

I have 2 units core swicth C4510R+E SUP7-E  need to connect together for redundant purpose , i bought also 4X 10GE uplinks for each core switches .May i know how i shall connect both core switches together using my spec Catalyst 4500 E-Series 12-Port 10GbE (SFP+) ?

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Cisco WAN :: 6500 / 6513E - Filtering Core Switch Ports?

Apr 15, 2013

Nowadays i have a project @ my work , the project consists of replacing our Cisco 6500 Core Switch with two other Core switches 6513E .
Is there is any tool to filter which port is connected to which server with its mac address and IP?

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Connecting Access Switches Directly To Core Switch?

Apr 30, 2011

Is this a good idea to connect access layer directly to core layer with fiber and omit the distribution layer?

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Cisco :: Can't Have Multiple Links From Each Access Layer Switch To Core / Distribution

Jan 24, 2013

I have been working on redesign of our network which was very challenging but almost there.We have a limited budget of around £20k(32k Dollor) Max. The cabling has been done before my time and it is very messy and cheap so you can not do a proper cisco hierarchical model at all.I can not have multiple links from each access layer switch to the core/distribution and as a result i had to connect some access switches together to introduces redundancy in a nutshell,we have two buildings, main building which has the server room in it and the other building which is just bunch of office. i have introduced a partial mesh on the normal building and have tried to introduce full mesh on the main building .

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Cisco Switching/Routing :: EWA14 - High CPU Utilization In Core Switch

Dec 20, 2011

I am experiencing high cpu utilization in my 4000 series core switch.
I checked the loggs. i saw some strange loggs.
Please see the below logs:


What is the "invalidsourceaddresspacket" ?
Is this is due to some virus attack or something?? Also one more thing this switch is the Active router in HSRP.

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