Cisco Switching/Routing :: 2900 All Switches Don't Have Cascade Cable Port In Back Panel

Jun 15, 2012

We have multiple cisco cat 2900 switches. all switches don't have cascade cable port in back panel. i want some sort of solution to manage those switch remotely.

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Cisco Switching/Routing :: 2900 Will Work As Access Port For More Than Vlans

Mar 27, 2012

I have came across this topic, and I am wondering if this images can be uploaded to any 2900 series switches or not, and if this will work as access port for more than vlans. URL...

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Cisco Switching/Routing :: 3750x Switches / 32 Loop Back Responding As A Broadcast?

Jun 7, 2012

I have a bunch of 3750x switches that each have a 10 gig routed link back to a central 4507 (loopback = carved up a /24 (of course, the /24 doesn't really exist except in our address tracking spreadsheet) into a bunch of /30's for routed WAN links and /32's for loopback addresses.We started on the low end for /30 subnets (ie,, etc.).We started at the high end for the /32 loopbacks (ie,, etc.)
Well, when I try pinging from the access layer 3750x switches, the 3750x seems to be treating it as a broadcast ping where it lists each member that responds instead of the regular !!!!! response (this makes think something is odd with the 3750x).  Of course, only one member responds (the core).  But even the core seems to respond with the other end of the /30 instead of the actual /32 loopback (which makes me think something is odd in the core).  I could have sworn that I've setup similar topologies without problems (ie, using,, etc as loopbacks) and as long as the mask is a /32, it should work.Also, I can ping/ssh to that loopback if my laptop is on a directly connected subnet.  But I can't do it from any of the 3750x switches (which are also directly connected).I've double checked for overlapping subnets, but nope.  I don't see any.  Routing looks fine.  The actual /32 is being propagated everywhere properly.

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Cisco Switching/Routing :: C3550 - Configure Loop Back Interface On Gigabit Fiber Port

Sep 14, 2012

I am trying to configure a loop back interface like so: [URL], on the following device:

C3550 Software (C3550-IPSERVICESK9-M), Version 12.2(50)SE, RELEASE SOFTWARE (fc1on port gig0/1 which is using a 1000Base-SX adapter. This is for troubleshooting purposes and it does not appear to be a feasible option.  Is there another way to accomplish in the IOS?

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Cisco Switching/Routing :: Cascade A (fiber) Dell Switch To Nexus 5000?

Dec 11, 2011

Is it possible to cascade a (fiber) Dell switch to Nexus5000 as shown above ?

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Cisco Switching/Routing :: ATM 8510 Back To Back With 7206vxr 155Meg Only Get 44Meg?

Nov 25, 2012

I have a Cisco 8510msr that is connected back to back with a 7206vxr across a 155Meg connection.I receive lots of Output drops on the 7206vxr interface facing the atm switch. When I do the following command:-

kwdair9#sh atm int atm 1/0Interface ATM1/0:AAL enabled:  AAL5 , Maximum VCs: 4096, Current VCCs: 27 Maximum Transmit Channels: 0Max. Datagram Size: 4528PLIM Type: SONET - 155000Kbps, TX clocking: LINECell-payload scrambling: ONsts-stream scrambling: ON797522 input, 881483 output, 203946630 IN fast, 223768062 OUT fast, 0 out dropVBR-NRT : 110288 Avail bw = 44712   <====  

I only have 44megConfig. is ACTIVEkwdair9# I only get 44Meg of the available 155Meg.There is no QOS on the router and the only commands I can find that vaguely see that refer to QOS are on the ATM switch:-

atm address 47.0091.8100.0000.0007.0d87.b201.0007.0d87.b201.00atm router pnnino aesa embedded-number left-justifiednode 1 level 56 lowest  redistribute atm-static?why this is acting like a DS3 link and not a 155Meg link?

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Cisco Switching/Routing :: Connecting Two 2951 Back To Back Through A HWIC-4T1 Card

Dec 4, 2011

What cable I need to connect two 2951 back to back through a HWIC-4T1/E1 card ?

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Cisco Switching/Routing :: HWIC-4SHDSL-E Router Back To Back Connection?

Apr 11, 2013

I have two site that has a copper wire ( 2 wire) connection between each router ( No Telco in between ). Now I want to use 1921 router with HWIC-4SHDSL-E card to connect these two site together. Can I use attach configuration to make the connection reference from the diagram ?

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Cisco Switching/Routing :: Connecting 2650XM - 2620 Router Back To Back WIC - T1?

Nov 25, 2011

I have 2650XM  router and 2620 Router Both routers have built in WIC  T1 CSU/DSU cards
2620Router --
2620Router#sh int se0/0
Serial0/0 is down, line protocol is down
  Hardware is PQUICC with Fractional T1 CSU/DSU
  Description: DTE  side
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, loopback not set

My question is that cisco website says there are two type of cable connections for this type of config --which are  --T1 CSU/DSU ConfigurationSet one CSU/DSU to clock source internal, and the other CSU/DSU to clock source line. The linecode, framing, data-coding, and timeslots must be set the same on both CSU/DSUs.Four-Wire 56k CSU/DSU Configuration For my network connection which type of config i should use??Secondly i try to connect these ports by normal crossover cable  it did not work.So for this type of connection i know i need T1 cross over cable--  which has RJ 48 connections at both sides.I check cable from ebay which is RJ45 RJ48 cross over  --  will this cable work in my router to router connection.

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Cisco Switching/Routing :: 2611 / 2801 - Configuration For Back To Back Support

Oct 19, 2012

I have 1 2611xm router and 1 2801 router. For my own lab purpose, i want to configure them back to back to support voice services. I don't know what configuration will be required at each end. in 2611xm, i have NM-2V and its also detecting the card, so i hope it will work ? also what commands i need to run on both ends .

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Cisco LAN :: 6513 How To Create Loop Back Cable For Gig Copper Port

Jul 4, 2012

How to create loopback cable for gig copper port (cisco 6513).I

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Cisco Switches :: Small Business SF300 Cascade

Mar 5, 2012

I have 4 SF300 switches I need to cascade together but the user guides do not seem to cover the physical aspects of cascading the switches.Here is what I was planning.
SW1 (port GB2) --> SW2 (port GB1)
SW2 (port GB2) --> SW3 (port GB1)
SW3 (port GB2) --> SW4 (port GB1)
SW3 (port GB2) --> SW1 (port GB1) - loopback for cascade cable redundancy.
Does this sound about right?after initial use the setup will be changed to place switches 3 and 4 in a factory at which time we will then use the GBIC connectors and fibre to connect SW2 to SW3 and then SW4 back to SW1.

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Cisco Switching/Routing :: 3750 Using Fiber Connection Using Patch Panel

Apr 2, 2013

I have a 6500 connected to 3750 using fiber connection using patch panel.on the gig port of the 6500 give of error in Input errors, CRC and FRAME.There is no error from the 3750 gigport.

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Cisco Switching/Routing :: 2960 - Connecting Two Switches Using Fiber Cable

May 25, 2013

I need to connect 4 Floor Building with 4 Cisco 2960 - 48 ports switch each other and it needs to be through a fiber. So all PCs connected to each switch would reach the LAN/WAN from the other switch. (attached is the image here with)
I see that the 2960 has 2 SFP ports each port of each switch should connect each other or how?
My simple question is:
1. What cable / patch code I have to use = Single-mode or Multimode? ( distance for each switch will not more then 25 mts)

2. Do I have to use SFP or SFP+ module?

3. What kind of SFP/SFP+ module I have to use = Single-mode or Multimode?

4. What kind of connector should patch code have = LC / SC or ?

5. How to connect each switch with redundancy like ...each switch should be interconnected with each other or I have to choose Cisco 3750G which has more then 2  SFP ports (option#1 & opetion#2 = attached here with) =

Best practice for connecting cisco switches over fiber.

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Cisco Switching/Routing :: WS-X6816-10G-2 Connecting SMF Fiber Cable To A MMF Port

Dec 12, 2012

I have a WS-X6816-10G-2T module with X2-10GB-SR modules. I will be getting a SMF hand off and the length of the termination is around 100 meters. (I will be getting another hand off for Inter-DC link for which I have X2-10GB-LR module). The question is can I connect this SMF hand off (short length) on the SR module?

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Cisco Switching/Routing :: 3750 - Two Switches Connected With Single Mode Cable

Jun 4, 2012

I am troubleshooting a fiber connectivity issue.Now I have two switches, one is 3750, and another is small biz 300 series switch. Both switch has a single mode smf gbic. Now I have two swtiches face to face and connect with a single mode cable. Do you think if I would get a link light on? Both ports are no shutdown.

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Protocols / Routing :: Port-forwarding - Linking Back To Network URL?

Jun 30, 2012

I have set up port forwarding for my WD Network HDD, which runs a Media Server (Twonky). Now, I have tested the ports and accessed it through the internet and it works fine, until... I click a link to open a folder and suddenly I get a "No such page" error thing. I have however identified this problem, it seems that when I go off the main page it re-routes to the original network address, not my IP forward address. For Example if my IP was and the port was 800 i would go to "" and it would load but once I navigate i go to "192.168.0.*:800/*****" and does not load the page. If i then copy and past my IP into the URL it works, but this is annoying.

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Cisco Switching/Routing :: C3750-48PS Switch Is Stuck In SYST Mode On Front Panel

Dec 13, 2012

After powering up a WS-C3750-48PS switch, Normal POST LED flashing of lights does not happen, instead the switch is stuck in SYST Mode on the front panel. My attempt to hold down the mode button upon powering up for 15 sec fails to reboot the switch. I cannot console to the switch. Is this switch unrecoverable? Should I RMA with TAC?

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Linksys Cable / DSL :: DPC 3925 Should Use A Switch Or Patch Panel

Oct 17, 2012

I am holding a DPC 3925 Cable Modem to connect to the internet. The wireless is great and all but i need something more.I need to connect another 8 cat6a cables to it to complete my home network. should i use a switch or patch panel or something?And not all 8 cable will be on wired. One or two connections are needed to extend the range of the wifi. What device can i use?I've got a ps3, NAS and media box that probably need the network connections to the main DPC 3925 Cable Modem.

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Linksys Cable / DSL :: Control Panel Crashes Wag54g2?

Feb 26, 2011

when i enter 2 Access Restrictions & add put some data After a period of time Control Panel crashes

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Cisco Switching/Routing :: IP SLA Between 2900 (15.0) And 2800 (12.4)?

Apr 11, 2013

I've problem with IP SLA probes between two different routers.2900 (c2900-universalk9_npe-mz.SPA.151-4.M4.bin) here is set "ip sla responder" only and 2800 (c2800nm-advipservicesk9-mz.124-24.T2.bin) here is set two type of tests "udp-jitter" and "icmp-jitter" - temporary, used to check for availability of 2900 router.As a result, I've what udp-jitter doesn't work at the same time icmp-jitter test is OK.Here are the settings of IP SLA tests
ip sla 281
icmp-jitter source-ip num-packets 100
tos 128
frequency 120
ip sla schedule 281 life forever start-time after 00:05:45


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Cisco Switching/Routing :: MEM-2900-2Gb For 2921

Nov 20, 2012

I have bought DRAM MEM-2900-2Gb for 2921, and received the following error...
Validation failed for DIMM0
*****System halted*****
%SPD info: DIMM0: Invalid DIMM type (only UDIMMs are supported)

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Cisco Switching/Routing :: Can Port Channel In 3825 Connect To Two Different Switches

Jan 17, 2012

We have one 3825 router used as voice gateway. For redudancy, we want to connect it to two different switches which has STP and HSRP running. Can I create a port-channel with two Giga interfaces in 3825 and connect to two different switches? Should I configure port channel in switch with only one port in each port-channel? I know server can be connected to different switches with NIC teaming. I just want to mimic that kind of setup. I did one time for port-channel in 3825, but it was connected to a stacked 3750X. So it's different case now.

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Cisco Switching/Routing :: ME380x Port-channel From One Switch To Two Switches

May 8, 2013

I am trying to configure port-channel from one switch to two switchs, and only one interface of each switches make part of the port channel.Cisco IOS Software, ME380x Software (ME380x-UNIVERSALK9-M), Version 12.2(52)EY4, RELEASE SOFTWARE (fc1) [code]

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Cisco Switching/Routing :: To Use Flexstack To Stack Two 2960S 48 Port Switches

Oct 11, 2012

I would like to use flexstack to stack two Cisco 2960S 48 Port switches (2960S-48TD-L) for redundancy. Each switch will have a single 10G uplink into our Nexus 7K. One switch in the stack will terminate to linecard 6 (N7K-F248XP-25) and the other switch will terminate to linecard 7 (N7K-F248XP-25). My question is how many flexstack cables are needed? Do I need only one cable or do I need two to connect the two 2960s ?

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Cisco Switching/Routing :: 3750s Port Channel Between Server And 2 Different Switches

Jan 27, 2013

Here's what I'm trying to do.  We are having new storage servers installed that will be using NFS.  I'm being told that they need to have their connections port channeled.  Right now, the servers have connections to 2 different 3750s for HA. Is it possible to configure a port channel between these 2 connections?

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Cisco Switching/Routing :: 3560 Multiple Switches One Trunk Port

Sep 21, 2012

We have 7 3560's in 7 different locations connected to our providor for wan access.  Our provider has given us a copper cable at each point and we have connected it directly to our 3560 switch at each location.  Each port is configured the same way at each location.  Each switch is running eigrp.All of the switch ports on each switch are configured as a trunk and vlan 299 had the ip address for the eigrp connection: [code] This setup is working as each switch see's all of the other switches as an eigrp neighbor.  We have also made sure that the switch at our head office has spanning tree priority for vlan 299.
So the problem is, if there is a change in the topology at one of the locations it usually causes one or more of the other connections to go down for some reason.  We just cannot pinpoint what is causing this change.  There are no log's or anything other than an eigrp hold time expired message.?

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Cisco Switching/Routing :: Configured Port Security On 2960 Switches

Feb 18, 2013

I configured port security on my 2960 switches with the following commands: [code]
The problem is that when I should change someone's PC, first I disable port-secirity, then I clear all the mac addresses learned on the interface, then I plug the new PC and enable port-security. The new PC couldn't connect to the network and it's mac address has not be learned on the interface. Why?Which commands should I use to clear an old mac address and enable port-security with the new mac address.

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Cisco Switching/Routing :: Stacking 24 And 48 Port 3750X Switches Not Working?

Dec 11, 2012

We purchased a number of 3750X 48 and 24 port switches for the College Campus. Am finally getting around to getting them inserted on the network. Working with a WS-3750X-48PF-S and a WS-3750X-24P-L. Have them stacked with the 10Gb uplink on the 48 port switch. Have not been having fun.In the boot sequence, the switches recognize they are stacked, but as soon as they finish boot, I get the message on the 48 port switch: “Stack Port 1 Switch 1 has changed to state down.” Then “Stack Port 2 Switch1 has changed to state down.” Am noticing that I have a message preceding that: “Major version mismatch with stack neighbor.”The 48 port is running c3750e-universalk9-mz.150-1.SE3, HBOOT 12.2(53r)SE2.The 24 port is running c3750e-unversalk9-mz.122-55.SE3, HBOOT 12.2(53r)SE2Most of our 3750X and older switches are running 122-55 or 122.58 code. IP base or Universal. There is speculation that the problem is the 24 Port is Lan base, as the part number might indicate. (WS-C3750X-24-P-L.... I think that is the part number) and the 48 is IP base. Both switches are Universal, and my understanding is that they don't care about LAN or IP Base until you enable a function that falls in the IP Base domain. Then I have to call Cisco Licensing.For these switches, LAN Base is fine, based on the boot message, I feel the real problem is 122-55 versus 150-1 in the stack. So.. the question is: Do I downgrade the 48 port to match what we have in our environment, and what is on the 24 port switch. Or... Upgrade the 24 port switch to match the 48 port switch and have an installation that is not consistent with our environment? I do have two more edge closets to install with this purchase of 3750X 48 port switches.

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Linksys Cable / DSL :: WAG200G Don't Get Light On Front Panel On Any Of Ports

May 19, 2010

I'm having trouble connecting via ethernet to my WAG200G. Everything was working fine a week ago but now, nothing.The problem is only occurring with one computer and I've tried the troubleshooting guide on the website to no avail.When I connect the ethernet cable from my computer to the modem/router, I don't get a light on the front panel on any of the ports. I've changed cables, ports, disabled ZoneAlarm and firewalls and nothing comes up. I've checked the ethernet connection from the computer to another computer and it's working fine.
On a different computer, I have no trouble connecting to the ports and can confirm that 1-4 are working and the lights come up.

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Cisco Switching/Routing :: 6509-E Switches Interconnected On Layer 3 Port Channel

Oct 3, 2012

We are currently designing  Layer 3 to the edge EIGRP solution  for our customers. The network is a hybrid of collapsed  core (Core to access) as well as a three layer design (Core/Distro/Access) for connectivity to the Data Centre, Internet, Wireless Blocks etc.The  core of the network contains two 6509-E switches interconnected on a  Layer 3 Port channel (no VSS). Access Layer switches (3750-X series running Stackwiseplus protocol)  connect to the core switches over p2p routed links and Distribution layer switches (3750X stackwiseplus) provide connectivity to the  Data centre, Internet, wireless blocks etc.
The access and distribution switch stacks(Cisco 3750-X) are set up with two or three member switches with uplinks multihomed to the primary and secondary core switch with each uplink included in EIGRP. In each of the stacks, one of the switches controls the operation of the stack, which will be  the stack master.As the Cisco Stackwise architecture is not SSO-capable but NSF aware, all Layer 3 fuctions must be re-established during a master switch outage. To minimize control plane impact and improve Layer3 convergence, uplinks should be diverse and originate from the member switches instead of the Master switches in the respective stack. This is as per Cisco recommended design solution.The above solution can be setup if there are more than two switches in the stack. i.e. uplinks are configured on the backup member switch modules.
1.But what about stack with two switches..Which switch should be set up as the Master for a two member stack with uplinks to the core primary and secondary from each switch(Master and Backup)
2. For Layer 3 routing, does the routing takes precedene over switch failures? Say for eg. In a two member stack, the master switch with uplink to primary fails, does EIGRP provide a fast convergence to route traffic via backup secondary and does not wait for the control plane on the switch stack to converge? All the access to core links will be set up for ECMP.

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Cisco Switching/Routing :: 3560 - Switches Capable Of 10GB Port Density

Feb 5, 2013

I have 3560's in my current environment, operating in the core/distro/access layers. The switches are in a star configuration, performs only layer 2 switching, and utilizes copper (no plans on moving to fiber).
With a fairly limited budget, I've been contemplating on upgrading the central node to a stacked 3750X to eliminate that single point of failure, and trunk the rest of the 3560's to the stacked switch. I wanted to be sure that the 3750X switches will be right for my environment (90-100 hosts), and if what I explained above is a good solution.
I'm also looking like to upgrade 6-7 of my servers (and SAN) with 10GB network cards. Do the ports on the 3750X have port densities capable of 10GB? If not, what switches provide that capability?

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Cisco Switching/Routing :: AutoQoS On Catalyst 2900 And 3560?

Oct 15, 2012

Cisco C2960S IOS:12.2(55)SE5
Cisco C3560X IOS: 12.2(55)SE3
The 3560 switch is serving as an access and distribution layer switch. End devices are connected to it and it also implements IP routing via SVI and L3 ports.Auto qos voice cisco-phone has been implemented on applicable access layer ports. SRND4 is being used.
mls qos map policed-dscp  0 10 18 24 46 to 8
mls qos map cos-dscp 0 8 16 24 32 46 48 56
mls qos srr-queue output cos-map queue 1 threshold 3 4 5
mls qos srr-queue output cos-map queue 2 threshold 1 2
mls qos srr-queue output cos-map queue 2 threshold 2 3
mls qos srr-queue output cos-map queue 2 threshold 3 6 7

Question 1:Why is the auto qos generated policed-dscp map different on these two switches?The Cisco Smart Business Architecture LAN configuration files guide [URL] does not specifically use the 3560 in their examples, they use the 3750 but it's my assumption that the same techniques, configs apply with regard to my specific feature questions. When using a 3750 in the Access layer, the guide shows (page 15) the same auto qos generated policed-dscp map configuration that is on my 2960. The SBA LAN config guide shows that when using a 3750 as a Distribution layer switch (page 26), the policed-dscp map configuration is the same that I see on my 3560.In the configuration guide for the 3750 distro switch, there is no auto qos applied as there are no access ports, so the mls qos commands are manually input. Since my 3560 does have access ports, auto qos generated the mls qos commands, and the results are the same be it following the guide and manually entering (per distro switch guidelines) or using auto qos. This leads to question 2...
Question 2:Why is the mls qos map policed-dscp configuration different depending on use as an access vs. distribution switch?
Question 3: On the 3560, access ports that have "auto qos voice cisco-phone" applied are put into queue-set 2 (output). Queue-set 2 (output) uses default values (not configured). Is this correct and desirable? If so, why? The 2960 has all ports in queue-set 1, regardless of being an access device port or a trunk port connected to the 3560 (as per the SBA LAN config guide EgressQOS macro commands). The 3560 trunk ports are all also configured to use queue-set 1 (output), again as per the SBA LAN config guide EgressQOS marco commands.

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