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 :: 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 - 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 :: 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 :: 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 :: WS-C4510R+E Modules

Feb 7, 2013

I have a WS-C4510R+E with
 
Mod Ports Card Type                              Model              Serial No.
---+-----+--------------------------------------+------------------+-----------
1    48  10/100/1000BaseT Premium POE E Series  WS-X4748-RJ45V+E   CAT1612L1JD
2    48  10/100/1000BaseT Premium POE E Series  WS-X4748-RJ45V+E   CAT1612L1JW
3    12  10GE SFP+                              WS-X4712-SFP+E     CAT1622L0SC
4    12  10GE SFP+                              WS-X4712-SFP+E     CAT1622L0RM
5     4  Sup 7-E 10GE (SFP+), 1000BaseX (SFP)   WS-X45-SUP7-E      CAT1620L1UJ
6     4  Sup 7-E 10GE (SFP+), 1000BaseX (SFP)   WS-X45-SUP7-E      CAT1620L1Z2
 
Can i add two WS-X4712-SFP+E and two 10 GE ethernet module also?
 
Is there 10GE ethernet module with WS-C4510R+E.

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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 :: 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 :: 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 Switching/Routing :: Limit For Creation Of Port Chanel In Core Switch 6509 And 6513

Feb 20, 2012

How much is the limit for the creation of PortChanel in a Core Switch 6509 and 6513?Is there a limitation byu hardware?

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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 :: Any Challenge To Upgrade Core Switch 6500 Series From Nexus 7009 Which Runs NxOS

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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Cisco Switching/Routing :: How To Connect 4 2960S / Uplinks To Core

Apr 21, 2013

I have a stack with 4 2960S and 4 uplinks to the core. I was wondering if it is better to connect one uplink for each switch, or just connect two switches, thus the two members (2&4) not directly connected.

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Cisco Switching/Routing :: 6500 / Connect A Juniper SRX Firewall To Core Switches?

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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Cisco Switching/Routing :: Install Line Cards (WS-X4548-GB-RJ45 / Chassis WS-C4510R-E) On Chassis Ws-6504-E?

May 15, 2012

we need to install a line cards (WS-X4548-GB-RJ45, chassis WS-C4510R-E), on a chassis Ws-6504-E.where I can find information about compatibility?

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Cisco Switching/Routing :: 3560x Or 3750x For Core Switching?

Mar 6, 2013

i cant find any difference in these two devices when i am trying to compare throughput.I need upgrade our new POP and there will be around 4900 MAC adresses in VLAN 150 and 130 MAC adresses in vlan 200.Uplink is 1 gig routed internet connection and there is 14 downlinks to separate villages.i found a few differences for eg stack interface on 3750x but i dont need it.  

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Cisco Switching/Routing :: L2 Vs L3 Between 1002 And 3750X Core?

Feb 4, 2013

we are replacing network equipment at one of our sites. The network will have 12, 3750X switches(6 stacks) - one stack will be the core. A 1002 will be the WAN router to the Main campus. The 1002 will connect to the core via 2 ethernet cables. I'm debating whether to use L3 or L2 between the router and Core. I've heard that routing is more efficient if L3 is used and also I will be able to create an L3 etherchannel  between the 1002 and Core switch. See the attached doc.

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Cisco Switching/Routing :: Convert CORE 6500 From VSS To Non-VSS?

Apr 17, 2012

how to convert the CORE 6500 from VSS to non-VSS?

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Cisco Switching/Routing :: Adding N5K To Existing Core

Mar 3, 2013

I need your input on how to appropriately introduce an N5K with Jumbo enanbled to a prexisting Core Network (Stack of Cisco 3750G Switches) without making any major alteration on the Core configs (everything is happy). The idea is to move two High I/O servers to the N5K during a transitional phase. I already have a fair understanding of what Jumbo-Frames are and what it does. Keep Jumbo-Frames within the N5K ONLY.

Conditions:
 
- Traffic is Data traffic, not storage/iSCSI
- The servers host our ERP applications and MySQL that is accessed heavily by users
- N5K to C3750G connectivity is a Port-Channel consisting of 4x1GB ports
- The servers are to remain on VLAN 2 (Data VLAN)
- The Core Switch is L3 and the boundaries reside here

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Cisco Switching/Routing :: C3750X-24S-E As Core In A L2 Network

Nov 24, 2011

I want to deploy the C3750X 24-port SFP switch as the core switch in a large Layer 2 switching domain.The switch will need to run:
 
+/- only 10 large VLANs, 6 VLANs with HSRP
+/- 500 MACs total
+/- 5 OSPF sessions default timers

standard PVST+ (no Rapid PVST+)i need around 27 SFP ports (24 + 4 on network module=28=ok, extra capacity by stacking)
 
Looking at the switching capacity of the specs (160 Gbps) this is much better than a C6500 with SUP32-GE !Will it be able to handle this or should i look for C6500+SUP32GE or C6500-SUP720 or maybe even C4500 ?

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