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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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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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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Nov 30, 2012
I have a requirement to connect two 3750 switch with 10G speed between two sites with 150km distance. We will lay-out our own fiber (48 core) between two sites. I just want to consult the following:
1. Could i use two core switch 6500 with single mode fiber as a transport equipment?
2. Or i need to use SDH equipment because of the distance concern? If so do i need a repeater?Could i use Cisco Metro Core ONS, which one?
3. Any other option to achieve this requirement?
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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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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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Jan 28, 2013
Is there any challenge to upgrade core switch 6500 series from Nexus 7009 which runs NxOS, because i have 3750X series switches connected at distribution and access layer in my network topology??
Is there any challenge if we place NxOS in core and IOS in distribution and Access layer??? how we are able to match sh run config in existing 6500 switch to Nexus 7009 NXOS?
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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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Feb 4, 2013
We have an existing network with a core 6500 as a VSS connecting 4 buildings with 4500 chassis under which number of L2 switches are connected. Currunlty we are using RSTP in ring for redundancy but we want to use OSPF in LAN for faster conversion.All the VLAN's are created on 6500.
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Mar 27, 2012
I have 2 6504's running HSRP as my core. They are each etherchannel'd to my Datacenter switch (3750 Stack) -- see image below.The problem i a having is with the etherchannel status:
Core1 PO11 status w (waiting)
Core2 PO11 status P(bundled)
DC11 PO48 status P -- but only to Core2 - the interfaces to Core1 are suspended. (See attached configuration documents) None of the devices have any information in the logs. I run this same configuration in my central location, but we are running Nexus 7000's. With the 6500's, do I need to split the port channels on the 3750 to allow them to negotiate the etherchannel? If I split the portchannels, are there any concerns? Should I expect to see the etherchannel status as P (Bundled) or H (Hot-Standby)?
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Apr 17, 2012
how to convert the CORE 6500 from VSS to non-VSS?
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Apr 30, 2012
I have an Issue.In my networks, 1 single user is facing Network Slowness issue. i needs to check to which port user is coneected in switch to CHeck whether that port has any errors.But problem is, i am providing support from remote location.And my concern LAN segment is Very big,I have only user Ip address details,when i ping the Ip address from Core switch it is pinging. but when i give show ip arp & give Ip address then its not learning and listing out the Mac address to trace down to the specific port.
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Apr 29, 2012
Doing a bug scrub on our dual core, dual Sup 720 6500s tonight. We are going from s72033-advipservicesk9_wan-mz.122-33.SXI4a.bin to SXI9. I want to get a second set of eyes on my script since I have not done this for about 1 1/2 years. Following this doc:[URL]
Script:
Backup
sh ver
remote command switch show version
[Code].....
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Mar 17, 2013
Assume that we have 2 Cisco 6500 series which redundant via GLP, now my question is how can we connect a Juniper SRX firewall to our core switches?
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Nov 23, 2011
As we know there are three layer in cisco Network Model:
-Core
-Distribution
-Access
So my question is in Core / Distribution layer should i use Etherchannel between switches or use Stacking if switches are stackble.For ex: suppose I have two cisco 3750 switches . so should i use etherchannel between them or use stacking in core layer?What are the advantages and disadv of both.
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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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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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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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Jun 19, 2012
I'm working designing a switch system for our core/data center.
We have 5 esx hosts, 2 sans with 3 nodes each. We have voice servers, a couple of routers and a few odds and ends. There are 7 other locations aggregating into this data center via 1-2gbps fiber connections. The bandwidth usage on these links is minimal, but there is a total of about 3000 devices aggregating into the system. My main concern right now is the 3560G's are seeing many output drops, due to the small buffer size on those switches. I have been looking at couple of options to resolve this issue, including the 4948E, 4507E, and 3750X switches.
Budget being the biggest factor, I am finding that the 4507 might be out of the price range. So I was leaning towards the 4948E switches for connecting the servers and iscsi san's as the 3750X is not recommended for iscsi. Redundancy is important so I would like to have two. The second concern is that I need to aggregate the fiber connections and for that I was looking at the ME-3600X or possibly the WS-C3750X-12S-E. I'm running eigrp, so this switch would need to have full routing, as it would also serve as the core switch for the 4948E's.
So in the end I was thinking that two 4948E switches up linked to the ME-3600X which would do full routing for the fiber aggregation and any routing needed for the servers and sans.
Servers and Sans_________4948E________ME-3600X_________7 fiber connections
|____________4948E_____________|
I would look at a second ME-3600X in the future for redundancy. This is the lowest cost biggest buffer solution that I could find.
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Mar 9, 2007
how to configure FWSM module in cisco core switch 6500
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Feb 8, 2012
The company I work have finally decided to enter the 21st century and invest in a new telephone system (Interactive Intelligence) to replace the legacy system which has served us well for the past 10 years. The project has only just started and involves upgrading sections of CAT3 cabling to CAT6, replacing Cisco 3550 switches in one area of the building with Cisco 4507 switches and upgrading our Core switches with Cisco Nexus 7010's. The area that concerns me most is enabling the network for qos as I have very little experience with it. At the moment Im trying to read as much documentation as I can on QOS to bring myself up to speed.
The access layer switches will consist of a mixture of Cisco 3750 & 4507 switches connected to Cisco Nexus 7010 switches which will form a collapsed aggregation & core layer.
Basically, how I should approach this daunting task of making sure the network will support VOIP.
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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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Jan 10, 2013
I've been fighting what seems to be an increased number of outqueue drops on our core stack and edge switches for the last 3 or 4 weeks.(The core consists of a stack of 5 3750s in 32-gig stack mode. The wkgrp switches are 3560s. all are at 12.2.52) The wkgrp switches are directly connected to users. We use Nortel IP phones with the phone inline with the user PC. auto-neg to 100/full. [code] However I have tried turning off QOS on a couple of workgroup switches (no mls qos, but left individual port configurations the same) but am still seeing drops.Since I have disabled qos on the switches in question (no mls qos) (not the core tho) I am presuming these commands have no affect on the switch operation and therefore cannot be related to the problem. With QOS turned off one would presume that it is general congestion - especially at the user edge where busy PC issues might contribute. So I wanted to see if I could see any instances of packets in the output queues building up.
I wrote some scripts and macros that essentially did a snapshot of 'show int' every 20 seconds or so, and looked for instances of 'Queue: x/' where x was greater than zero.What I found after several days of watching the core stack, and a few of the workgroup switches that are most often displaying the behavior, was that I NEVER saw ANY packets in output queues. I often saw packets in Input queues for VLAN1, once in a great while I would see packets on input queues for fa or Gi interfaces, but NEVER on output queues. [ code] Additionally, when I look (via snmp) at interface utilization on interfaces showing queue drops (both core and wkgroup), they are occurring at ridiculously low utilization levels (as low as 4 to 8%). I've tried to look for microbursts between the core and a wkgroup switch where the core interface was experiencing drops, but haven't seen any (using observer suite). [code] While the queue-drop counts aren't critically high at this point, they are happening more frequently than in the past and I would like to understand what is going on... In most cases, no error counters are incrementing for these interfaces. Is there some mechanism besides congestion that could cause output queue drops?
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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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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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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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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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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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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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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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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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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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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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