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(192.168.51.1) and int vlan 50(192.168.50.0) 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 :: Core 4500 Series Supervisor Engine?

Jun 19, 2012

Our company will go to buy a core switch 4503. What is the difference between the Catalyst 4500 E-Series Supervisor 7L-E and the Catalyst 4500 E-Series Supervisor 7-E?

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Cisco Switching/Routing :: Configure Nexus 5596 To Support Proper QoS For EF At The Core?

Feb 23, 2012

I am deploying a pair of Nexus 5596's with 3750 POE switches in the closets.  I'm looking for a best practice as how to configure the Nexus 5596 to support proper QoS for EF at the core. 

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Cisco Switching/Routing :: 4500 - How To Configure The SFP Ports

May 23, 2012

How i can  configure the SFP Ports on my 4500 SERIES CHASSIS with other SFP ports on the connecting switch. I want to connect 15 switches via GLC=SX=MM to my 4506E sfp card.

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Cisco Switching/Routing :: Configure HA Catalyst 4500

May 20, 2012

I have two Cisco Catalyst 4507R-E I configure HA.  Tips?I plug them in gigabits ethernet?

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Cisco Switching/Routing :: 3560 What Protocol Should Configure To Prevent In Case One Core Fails

Feb 14, 2013

We have one core switch and we are planning to add a 6509.  Both are none VSS.All the access switches are Catalyst 3560 series.
 
We plan to have all 3560s to have a link to each of the core. Without VSS, it is not possible to etherchannel to both core switches correct?What protocol should I configure to prevent in case one core fails? HSRP, VRRP, GLBP?
 
Do I need to run spanning tree protocol? if so which one?What is the best way to connect from each Catalyst 3560 for load balancing and redundancy? One to each core?

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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 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 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 Switching/Routing :: Configure 3750 Stack As Core / 2960 As Access Layer Switches

Sep 29, 2012

I configure 3750 stack switch as core and 2960 stack switches as access layer switches.I connected my laptop to one of my core stack in VLAN 10 and I am pinging to one of my server in VLAN 1. What will be the minimum latency at the time of inter VALN routing

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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:

Code...

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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Cisco Switching/Routing :: 2960S Unable To Connect To Core Switch

Sep 21, 2012

I have a problem with extending the LAN on a client site . They are looking to extend the LAN with a 2960S-series switch. Already in place is a 4510 switch which the 2960 is connected to via fibre. The 2 switches are both set up but there is no connectivity as I cant ping between them or anything. The management VLAN on the 2960 shows line up, protocol down, which I believe means the VLAN is enabled but there is a form of physical mismtach on the ports. I have attached the configs of both switches. I feel it might be a problem with GBIC module compatibility. The SFP installed on both ends of the switch are GLC-SX-MMD. On the 4510, the SFP sits in a twingig converter (CVR-X2-SFP) but there is no light on it at all when the cables are plugged in.

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Cisco Switching/Routing :: 6500 - Changing VTP Mode Of A Core Switch

Oct 14, 2012

We have two 6500 core switches and one(primary) of them is running in VTP transparesnt mode and the other (secondary) one is running in VTP client mode. I would like to change the VTP mode of the second switch to transparent mode. Would it cause any issue. I guess i have to create VLANs onto the switch.

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Cisco Switching/Routing :: Connecting Core Switch To Firewall 3750x

Apr 13, 2013

I have a 3750X four-switch stack acting as the core of a fairly simple LAN. All I need to achieve (and this seems inordinately hard, but it is entirely likely that I'm just being dense) is to get access to the internet through my core switch, through the firewall and out through my VSAT. I've spoken at some length with the firewall providers (Cyberoam) and they tell me all I need to do when I migrate onto my new system (Cyberoam is currently in place at the entrance to our existing LAN) is change the local IP address of the Firewall, plug in the new switch to the LAN port, and away I go. Tried that, didn't work, so obviously I'm missing something.

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Cisco Switching/Routing :: Migrating Core Switch From 3750 To 6500?

Jun 5, 2013

I am planning to migrate the core switch from cisco 3750 to Cisco catalysts 6513 switch. What could be the best approach to minimize the downtime or avoid disrupting the production. I have couple of thoughts, one method is to build the core and then replace the existing core, another option is to build the new switch as the second VTP server and once it recieves all the VTP information then disconnect the old server.

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Cisco Switching/Routing :: Change From 3com Core Switch By 2960?

Aug 30, 2012

choosing a core switch, to replace a swich 3com model 4924, its main function is to support a 4-LAN switch cisco 2960 (100 users) and a ring cluster of 12 servers.obs. Current 3com core switch has 56 Gbps performance and 41.6 million packets per second.

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Cisco Switching/Routing :: Upgrade Software Of Core Switch 4503e?

Nov 2, 2011

i am trying to upgrade the software of the core switch 4503e, i could not get the managemenet ip address up and running. what i did is the following :
 
interfave vlan 1
ip address 192.168.1.1 255.255.255.0
no shu
  
then my laptop ip address is 192.168.1.100 255.255.255.0?result pinging from CLI is request time out.is there any els command where i need to input ?

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Cisco Switching/Routing :: Very High CPU Utilization Core Switch 4503?

Feb 14, 2012

We  had a core switch(30 vlans) in our environment and it's noticed that  CPU utilization of the core switch is showing high during recent days. I  have checked logs and processes, but couldn't find the root cause. The  issue found only in the office hourly only(after that the cpu  utilization is idle and normal). I have already referred the following  link to troubleshoot the issue " [URL]
 
see the following outputs from the core switch
 
CPU utilization for five seconds: 99%/0%; one minute: 99%; five minutes: 99%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
  30   6687557041432420936        466 47.52% 47.10% 45.98%   0 Cat4k Mgmt LoPri
  55  30667074884269560256          0 45.36% 45.50% 45.85%   0 IP Input
  29  28552856922870089254          0  3.59%  3.50%  3.57%   0 Cat4k Mgmt HiPri

[code]....
 
Note: Each Invalid source mac entry in each day from same port (above is the output after clearing logs before 3 days)
  
My queries regarding the issues are following
 
1) How can we find root cause regarding the high cpu utilization?

2) Is a single invalid mac address makes the cpu highly utilized for suppressing it?

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Cisco Switching/Routing :: Upgrade IOS For Production Core 3750 Switch

May 7, 2013

I want to upgrade IOS for my production core 3750 switch. Below is Show version/fash output. I have IOS image "c3750-ipservicesk9-mz.122-55.SE7", need to confirm below concerns:-
 
1-As this is stackable switch do i need to upgrade on all Switch..i can see there are 3 flash while doing show flash?
2-Is above IOS image support with  my switch? do i able to enable ssh?
3-is flash memory is enough to succefully upgrade IOS?
4-Any other point which i should keep in mind before upgrading..any special feature which this IOS wont support.

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Cisco Switching/Routing :: 3750X / Core Switch In Redundant Mode?

Nov 18, 2012

Two Cisco 3750X can be stacked together to ensure redundancy.Is the attached topology feasible for access layer redundancy?

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Cisco Switching/Routing :: WS-4503 - Core Switch Having High CPU Load

Jan 13, 2012

We have two core switches in our network (Cisco WS-4503). HSRP is working as Active-Standby mode. Recently it has been found that core 1 (which is in active mode) shown high CPU load (60% - 100%). Also found that the below mentioned process takes more CPU. Our network consist of around 30 Vlans. We have already checked for the solution in Cisco website [URL]  but couldn't find exact reason. see the below outputs for core 1 switch.
 
Core1# sh processes cpu sorted
CPU utilization for five seconds: 55%/3%; one minute: 65%; five minutes: 71%PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process  30   1606933521086983644        147 24.79% 29.93% 35.85%   0 Cat4k Mgmt LoPri  29 

[Code]....

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Cisco Switching/Routing :: 5520 Dual Core Switch For Redundancy

Sep 16, 2012

I have the following: 1 5520 ASA connected to the internet, 2 core switches, and several access switches.Aside from implementing RSTP, VRRP, hard code access and trunk ports, is there any other recommendation you would like to add.

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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 0.0.0.0 0.0.0.0 10.170.10.10
 
10.170.10.10 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 0.0.0.0 0.0.0.0 10.80.10.10
 
10.80.10.10 is --> Next hop for the new DSL router internal IP.

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Cisco Switching/Routing :: Setup SG300-20 As Core And SF100-48 As Distribution Switch

Oct 6, 2012

To setup SG300-20 as CORE switch and SF100-48 as Distribution switch.SG300-20 will have 2 VLAN(DATA and VOICE)
 
-192.168.14.1/24 DATA
-172.168.0.1/24 VOICE
 
SF100-48 will also have 2 VLAN(DATA and VOICE)
 
-192.168.14.1/24 Desktop/Laptops
-172.168.0.1/24 IP phones
 
Problem is when I tried to assign IP to any VLAN's the switch will just hang and loose my connection the light will stop blinking it will steady and i unable to access the switch until i turn off again?

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Cisco Switching/Routing :: Possible To Configure QoS On 4500 Sup7 On Layer 3 Routed Port

Apr 26, 2013

I want to know if is it possible to configure QoS on a 4500 Sup7 on a Layer 3 routed port like the following example (Similar to CBWFQ on IOS Router)?

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Cisco Switching/Routing :: 4500 R Switch PBR Tracking?

Dec 14, 2011

Why Cisco 4500 R switch PBR tracking Command not working , I found just route-map next-hop ?

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Cisco Switching/Routing :: 3750 / 6509 - Upgrade Core Switch Without Disrupting Network?

Feb 2, 2013

I am planning to upgrade the current core switch(3750) to 6509 series switch. Since we have a production network running we have to plan for an online core switch upgrade.

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Cisco Switching/Routing :: 6509 Core Switch Command / IP PIM Sparse-dense-mode

Oct 23, 2011

What is PIM? give me an example when I will use and not use the PIM command.

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Cisco Switching/Routing :: Not Logging All Levels Of Sylog Messages From Core Switch 4503

Apr 23, 2012

We had a core switch(4503) in our environment and recently we tried to enable syslog in the switch. But the syslog server doesnt receives all the configured level messages from the switch. Following is the only message getting in syslog server after the configuration change in switch.
 
%SYS-5-CONFIG_I: Configured from console by CWLMS onvty1
 
(No Traffic related messages like acl deny traffic, spanning tree events etc are getting to syslog server as well as log buffer of the switch)
 
Following are the logging configuration for the core switch
 
logging monitor informational
logging facility syslog
logging source-interface Vlan44

[Code]....

1) Is there any more configurations required for getting all traffic related messages, (i mean all possible messages - upto level 7 - debugging)?

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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 :: Using Wireshark Feature On 4500 Switch?

Jul 22, 2012

We are going to be rolling the 4500 switches out and I wanted to know more about how to use the wireshark featue. Any documentation on how to use this?

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Cisco Switching/Routing :: Getting Continuous Logs On 4500 Switch?

May 15, 2013

I am getting continous logs on my 4507 Switch :
 
May 16 12:45:09.000: %C4K_RKNOVA-4-INVALIDTOKENEXPIRED: STANDBY: Suppressed 302 times)Expired token 16490 in the invalid token list (NumEntries: 6) of type IrmPortId other id == 4294967287
 
May 16 12:45:09.000: %C4K_RKNOVA-4-INVALIDTOKENEXPIRED: STANDBY: Suppressed 302 times)Expired token 16490 in the invalid token list (NumEntries: 6) of type IrmPortId other id == 4294967287
 
 does it lead to high CPU utilisation as well ??

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Cisco Switching/Routing :: 4500 IOS Image Not Included In Switch Box

Dec 2, 2012

We've ordered a 4500 core switch and 4948 Server Farm switch for our client, but the switch box does not include a IOS image CD or anything related to IOS image and now the client is asking us why is this item missing as the IOS

-S45UK9-32-1502SGCAT4500e SUP7e Universal Crypto Image 
-S49IPB-12253SGCisco CAT4900 IOS IP BASE W/O CRYPTO 

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