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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May 30, 2013
We have a cisco 3750-48 port switch.We have a few SVI's configured and some static routes configured.I had created a new interface vlan and gave it an IP. I can ping the gateway.
Now I want to add a static route to go out that interface.when I add: ip route 10.x.x.x 255.255.255.0 10.52.10.1
it eccepts it (no errors) But, it does not show in the routing table nor in the config? How to add the static route to go out that vlan interface.
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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 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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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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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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Dec 13, 2011
boot system switch all flash:c3750-ipservicesk9-mz.122-55.SE1/c3750-ipservicesk9-mz.122-55.SE1.bin;flash:c3750-ipservices-mz.122-25.SEE2/c3750-ipservices-mz.122-25.SEE2.bin We have two stack of 3750 switches. When I enter above command getting below mentioned error, two images are showing switch 1, but one image only showing in switch 2, i.e 1st image in show boot command.
%Command to set boot system switch all flash:c3750-ipservicesk9-mz.122-55.SE1/c3750-ipservicesk9-mz.122-55.SE1.bin;flash:c3750-ipservices-mz.122-25.SEE2/c3750-ipservices-mz.122-25.SEE2.bin on switch=2 failed
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Mar 25, 2013
when we add new switch to STP converged enviroment, switch flush the data from the data base.how to protect database from deleting the information
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Mar 12, 2012
Having an issue with two Cat 2940, they have fiber 100Base-TX. Added a new Cat switch (the second on the VLAN), the existing Cat switch drops the fiber connection.
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Mar 7, 2012
I just added a X6704 card to our 6513 switch, and it is not working correctly. We are running 12.2(33)SXI5. [code]
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Apr 11, 2013
We just replaced our ancient 6509 dedicated SAN switch with a Nexus 5548UP (with 4 2248 FEXs).Our old SAN 6509 was completely separated from the Core 6509, and that Core 6509 doubled as a Datacenter switch. We've now segmented the "Datacenter" and "Core." The SAN and servers are connected to the Nexus gear rather than the Core. The old SAN had only 3 vlans. One for SAN data (Vlan16), one for management interfaces (Vlan250), and one for switch management (Vlan15).
As part of my cleanup, I want to get rid of that Vlan15 and use vlan250 for switch management. In another building, we have a 3750 that provides SAN (Vlan16) and management (Vlan250) connectivity to a single Equallogic box and a Dell PowerVault tape drive for backup purpose. That 3750 is the only device that still has an address on Vlan15 (other than the core). Refer to the drawing below.
The Core 6509 is the gateway for Vlan250 and Vlan15. I have created an interface for Vlan250 on the 3750. ACLs exist on vty connections of each switch allowing telnet access ONLY from the Mgmt 2960. There are no ACLs on the Vlans themselves.From the Mgmt 2960, I can telnet to the 3750 using either its Vlan250 IP address or its Vlan15 IP address. However, if I shut down Interface Vlan15 on the Core 6509, I can no longer telnet to the 3750, not even using its Vlan250 IP address.
The connection times out. If I attempt to telnet to the 3750 via Vlan250 from the Core 6509, I get connection refused (which I should get due to the ACL on the vty connections). I can still telnet to other devices on Vlan250 (such as the management interfaces on the Nexus 5Ks). Why am I able to telnet to the 3750's Vlan250 Interface only when the Core's Vlan15 Interface is Up?
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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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Mar 29, 2011
I have a very basic networking question If I have, say, 3750's (or any L3 switch, capable of routing) at the edge and a 4500 at the core, where should I route? At the edge? At the Core? Both?
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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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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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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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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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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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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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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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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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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
example
ip route 0.0.0.0 0.0.0.0 1.1.1.1
ip route 0.0.0.0 0.0.0.0 2.2.2.2 100
if my core switch detect next-hop 1.1.1.1 it will re-route and go to the 2.2.2.2 for the next-hop my core switch using static route and cant support ip sla
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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
[Code].....
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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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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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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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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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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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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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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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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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