Cisco Switching/Routing :: 2950 And Cable Router - Expand Home Network
Apr 27, 2012
I just picked up a 24 port Catalyst 2950 to expand my home network and learn a bit more about networking. Having just upgraded the IOS software 'm now trying to get this to work as required on my network but I'm having a few issues.
My intentions are to plug my cable router/modem wan connection which is set up as the dhcp server to fa 0/1, then use fa 0/2 - 24 for the rest of my wired network. So essentially all on the same subnet interfacing with the router 192.168.0.1.
So far I have set up all of the security on the switch, and have all switch ports assigned to vlan1 with no IPs. My laptop connected to fa0/2 however is not assigned an ip address. Looking at a few posts I ahve rightly or wrongly played about with dhcp snooping.
Config
Current configuration : 2205 bytes
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
service (code)
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Jan 31, 2012
Our network feels slow and trying to find the best way to investigate this properly. We have Cisco chassis 4500 with mix of 3560/2950 Edge switches 1GB backbones and WLC/WCS in place. The network is broken into multiple V LANS and IOS on our switches haven't been updated in 3-4 years.
On a wireless laptop (G) with get throughput of 1-2MB/s transfer speed with usually 10 clients per AP and LAN we get anywhere between 7-15 MB/s transfer. Using wire shark on a wireless laptop we see a lot broadcast traffic from other clients and the same for LAN. What is the best way to troubleshoot performance issues on the network and where do I start?
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Jan 27, 2013
I have a lab setup to take my CCNA and CCNP and I'm having issues trying to get WAN connectivity back to a switch at the end of my network. My lab environment consists of 1 - 2950 switch, 1 - 2620 and 1 - 2621XM. I have 1 Ethernet connection from each router to the switch and 1 serial connection from the 2620 to the 2621XM. I have the serial interfaces in a shutdown state right now so there is no loop since I do not have Spanning tree setup on the ports on the switch yet.
Right now using the fast ethernet ports on the routers and I have no issues its when I shut down those Ethernet ports and try using the serial interfaces when I start having issues. So my network layout is Ethernet from switch port f0/4 to port f0/0 on 2620 and serial from s0/1 on the 2620 to s0/2 on the 2621XM. My 2621XM f0/1 is whats connected to the WAN and I have no issues getting to the WAN from my 2621Xm or my 2620 but when I try pinging any website or even my WAN default gateway from my switch I get nothing!
Ive also noticed that when I do a IP NAT translation (after accessing the WAN from my 2620) on my 2621XM the source IP is of my serial connection not the ip of my 2620 router? I have my default gateway on the 2620 as the the IP of my serial interface on the 2621XM and vice versa because my LAN network is 172.16.1.0 and my WAN is 172.16.9.0. I have a /31 setup between my serial connections 172.16.11.0 (s0/1) is on the 2620 and 172.16.11.1(s0/2) is on the 2621XM. I used the SDM (ver 2.5) to setup NAT to have f0/1 with Nat outside and s0/2 as Nat inside. Encapsulation is HDLC between the serial links. Ive attached the running configs of the switch and routers.
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Jan 8, 2012
I came accross a Cisco 1801 router. As I understand it supposed to work with a dsl connection for internet access and configuration. I have cable internet access at home and since cisco routers are very versatile, I want to know if I can integrate this router into my home network, as a secondary router, and use it for its SSL vpn capabilities?
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May 26, 2013
I have a good working knowledge of TCP/IP networking. I have a Cisco 3660 router I'm wanting to use in place of a WRT54G router with my Charter cable internet service. I saw a youtube video where a guy demonstrated how to use a Cisco 2600 series router with home broadband service. I followed the video to setup my 3660 router. I can ping the LAN side (192.168.1.1) with no problem, the DHCP functions as it should. I can see activity on the on the WAN port indicator but no internet access. I have attached .doc file that shows the "sho run" info. My network will be setup as follows Charter Cable Motorola Surf Modem - ethernet to MM fiber converter - MM fiber over to Sun Microsystems cabinet fiber closet - MM fiber card (on Cisco 3660 router FA6/0 WAN interface) - LAN interface FA0/0 - Cisco 3524 managed switch. One of the gigabit MM fiber ports on the Cisco 3524 feeds a 3Com Superstack 12 port gigabit fiber managed switch. My two Dell 2950 servers will be on the Superstack gigabit fiber backbone. The Cisco 3524 10/100 ports will have a Cisco access point, two IP addressible battery backup units, two Dell Desktops, and a LG Blu Ray player.
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Oct 12, 2012
In my preparation for my coming CCNA certification I am experimenting with different network configurations. In my test network I am currently working with a "Router on a stick" setup. A Cisco 2611 router connecting a Cisco 2950 switch. VLANs configured on the switch and subinterfaces + dot1q encapsulation configured on the router. Switch only supports dot1q.Router's Eth0/1 is connected to the Switch Fa0/24 port which is also set to trunk mode. I am using a normal Cat5e twisted pair cable to connect the 2 devices.
VLANs are working since I can connect a workstation to an access port for example fa0/2 (vlan2) and get Internet access.I can also ping any of the subinterfaces of the router from the workstation.With the current setup I am not able to ping the switch from the router, or the other way around, so in other words I can't remote manage the switch from a telnet or SSH session with this setup. What I am missing?Just to be clear I am pinging the switch directly from the router (Router2611#ping 172.16.100.2), so please ignore all static routes and OSPF. [code]
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Jul 6, 2011
I have a netgear CVG834G main router, were my desktop is plugged on to.I pulled a new cable trough the house and garage to have internet access on the other side (cable length is about 80 meters).After the 80meters of cable I placed a Linksys WRT54GS v5.1 router. The problem is that I can connect to the Linksys, but the Linksys can�t connect to the netgear. On the Linksys the internet LED is blinking very slowly (what does this mean?). So first I thought that the cable was broken or too long. I tested the cable => not broken. I connected the Linksys with the netgear trough a shorter cable and then connected my laptop via the long cable (80meter) and this works perfectly.Is the maximum distends a netgear can take less than 80 meters? (thought is was 100meter ).
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Dec 18, 2012
i bought a cisco 2950 series switch to play around with and im trying to set it up to SSH. I have google'd a bit on how to do this and i've sort of hit a wall... i have downloaded the cryptographic image from cisco's website, installed a TFTP server (think this is where my issue lies) but when i do the copy tftp flash global command i keep getting the error accessing "xxxx" message.I have tried allowing the server through windows firewall, disabling windows firewall, allowing access through the router..
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Sep 20, 2011
I'm currently in the process of buying the new property, which is in the build process and would like to put some cables across 3 floors, which would be connected to the router downstairs.
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Sep 27, 2011
I have a wrt160n that I would like to use to expand the range of my wireless network. I have tried a few solutions, but to no avail. I am thinking I have just not found the proper steps.I am behind a dsl wireless router that Telus has provided me. The values of that router setup are as follows:SSID: TELUS4108WPA/WPA2-AESDefault gateway: 75.156.190.1DNS address: 199.185.220.254Subnet mask: 255.255.255.0
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Jul 20, 2011
Lately I've been experiencing connection problems between my router and cable modem. Every night after 11:00 PM EST, my Internet connection sporadically goes out. I called my ISP who said there was nothing wrong on their end. Plugging directly into my modem allows me to access the Internet. When I wake up in the morning, the connection is back until 11 or later again. I ran WireShark but I'm not sure what to be looking for. There are a lot of random things from the LLMNR protocol like standard query A zmtvrjaql.
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Feb 18, 2013
i have an ARRIS TM822 cable modem provided by comcast, in addition i have a linksys e3000 wireless router. what i am trying to accomplish is to bridge the cable modem over to the router. i messaged comcast about this issue and i have attempted what they told me to do, but im not getting any where.
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Jan 31, 2013
Trying to configure an 891-W on my home network.
Basic TW cable modem ---> 891-W with DHCP I have done the following and are getting an IP address but no internet. I have FE8 set as DHCP and VLAN1 as 192.168.1.1 255.255.255.0
I originally thought that "WAN GE 0" would be connected via my modem but I had no luck there either so I set FE8 as WAN?
Building configuration...
Current configuration : 2907 bytes
!
! No configuration change since last restart
version 15.1
[Code].....
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Apr 3, 2012
Have a client wanting to hand out public ip addresses to all clients from a PFSense Firewall terminating the internet connection.
How do I allow the Cisco Switches currently in place, configured with private ip addresses in the 10.10.x.x ranges and Vlans, where the main 3550 layer 3 has defined dhcp scopes for each vlan, to relay dhcp requests from all vlans to the PFSense firewall?
I assume I would take off the currently defined dhcp scopes for the vlans and configure each vlan/switch with the ip helper address and specify the PFSense firewall and that Nat would have to be disabled onthe firewall?
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Feb 11, 2012
Is there a way to get more messages out of a 2950 set to syslog? I've turned every logging option I can find to DEBUG, but all I get in my syslog are LinkUp/Down messages and "Configured from console by console". I'd love to see more information such as configuration changes, or even someone attempting to set up DTP on a switchport set to access mode.
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Jun 22, 2012
One of my wi-fi site having 2nos cisco 2950 switchs. in that network some D-link unmanageble swithes also there and access points also connected to cisco switchs and D-link switchs.after one or two days i am not able to connect the wi-fi, then i need to restart the access point then only wi-fi is working fine.I upgraded the latest ios also.I connected some access points to the cisco switch ports, those ports are showing crc error messages like below. [code]
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Apr 25, 2013
I have a server windows 2008 that I would like to have a nic teaming configuration, the server has two nics, each nic is connected to a different switch. One is connected to cisco 2960 and the other is connected to cisco 2950. I have read here in forums about nic teaming but using the same switch. I have not found using different switch. Is this possible?
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Jan 11, 2012
2950 switch has a IOS on flash , but i would like to set the swith like...
1. switch IOS to be loaded from TFTP server .if it fails
2. Loaded from local flash IOS1 , if it fails
3. IOS loaded from local flash IOS2.
does 2950 switch support this feature.
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Jun 11, 2012
I have a problem with an etherchannel between a cisco 2950 and a couple of catalyst 4506. The cisco 2950 is connect via an etherchannel to the catalyst 4506A. The channel consist of two port on both side and is in trunk mode, encapsulation dot1q.Now i have the necessity to connect the 2950 to the other catalyst, 4506B. So, i copy the same configuration on the 4506B, but when I unplug the two rj45 cables from the catalyst 4506A to plug them in the 4506B the etherchannel doesn't go up in any way.
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Dec 14, 2011
I have a cisco catalyst 2950 switch (flash:c2950-i6q4l2-mz.121-22.EA1b.bin), in remote location with public IP,how to upgrade ios remotely, by that time running configuration will go?how much down time is required and ?
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Jun 12, 2012
I have 10 2950 switches on my network that support only 64 vlans on each one. I actualy have requrement to cleate around 100 vlans acros them, can I switch off vtp and create required vlans manualy? I will have more or less following set up:
router
|
2950 - vlan 1,2,3,4,5,6,7,8,9,10
[Code].....
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Dec 9, 2011
c2950-i6q4l2-mz.121-22.EA10a.bin is the image name of the 2950 switch i have in my office. what is the meaning of " i6q4l2 "? I saw some IOS like IP base, adv-security. but i didn't see anything like this before.
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Jul 15, 2012
What are the security issues in connecting a notebook to a console of the 2950 switch? Can virus or Trojan enter into a switch during configuration session? If the answer is yes, what precautions must I take to prevent such case?
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Oct 26, 2009
i am having 2950 switch. Now i login through telnet but as per the company standard i have to login through ssh. Is there any possible to enable the SSH in 2950. Any IOS supporting this operation.
flash:/c2950-i6q4l2-mz.121-19.EA1c.bin
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Feb 8, 2013
After setting up the domain name I try to use the crypto key and it is no where to be located. Below is some of the information I copied from TeraTerm
Switch-1(config)#ip domain-name justin.lab.comSwitch-1(config)#crySwitch-1(config)#cry?% Unrecognized commandSwitch-1(config)#crypto key ?% Unrecognized commandSwitch-1(config)#crypto key ^% Invalid input detected at '^' marker.
Switch-1(config)#?Configure commands: aaa
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Jun 10, 2012
I configured rate limit on cisco 2960 switch sexuss fully, but i could not configure in cisco 2950 (verson 12.1 (22).To confiure the same on 2950
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Dec 9, 2011
I am experiencing high cpu utilization in my 29501 switch. see the copied sh process cpu output.
CPU utilization for five seconds: 99%/95%; one minute: 89%; five minutes: 37%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
1 0 2 0 0.00% 0.00% 0.00% 0 Chunk Manager
[Code].....
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Apr 18, 2012
I am trying to test the gigabit ports on a Cisco 2950 switch. 1000Base-SX. I have the internet or dhcp server connected to port 24 on the first switch and my pc hooked up to the (any) port on the second switch. Both switchs are connected with a fiberoptic cable with MTRJ connectors on either side.
Now when I use gi0/2 on both switchs all works fine. I get a dhcp address from the router on the other end of the first switch. but when ever I include gi0/1 on either end of the fiber optic cable neither of the ports will initialize (neither of the leds above the ports light up). I have deleted all the config files before booting up the switchs so they should have a default blank configuration.
When looking at the Http web page for the switch I dont see any issues with the port. what can I do to make sure these ports are working or can be configured?
I will not be able to post back any more information about the switch until next tuesday. Im off till then.
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Apr 27, 2012
Stumped again with my Catalyst 2950. Everything is working perfectly with wan/dhcp/router on fa 0/1 with all ports assigned to vlan1. All devices plugged in connect to the router correctly with ip's being assigned via dhcp.Instead of hooking up by console port I want to be able to SSH or telnet in to the switch using any port while still maintaining the above functionallity. Is it possible to assign a dhcp assigned ip address to vlan 2 and have vlan1 and 2 bridged? Or is there a better way of doing this ?
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Jul 4, 2012
spam up the boards with the same basic CCNA level stuff, but I have a couple of questions about ios differences, limitations, and references. I have the following three switches. One appears to be considerably dated in regard to software version. My confusion/ignorance stems from managing VTP settings.
2924XL 12.0 5 WC8
2950 12.1 22 EA6
2950 12.1 22 EA6
When I set either 2950 switch as the VTP server, and the other as a client, the client inherits the server settings as expected. However the 2924 requires that I go into the vlan database from priv exec and manually set vtp client. That's pretty similar to setting any switch to client mode. The problem I am observing is that after setting the 2924 to client, it still doesn't inherit vtp version settings or pruning settings. I still have to manually configure those. Additionally, if I copy run start the 2924 after making these manual settings, and then reload the switch, all the settings are lost and it defaults back to server mode with all features disabled. From my searches, it looks like vlan information is stored in vlan.dat, but all the documentation I've found is on 12.1 ios which doesn't appear to use vlan database for vtp setup, meaning it might still be an issue, but not one I'm focused on at the moment.
Is the vlan database dumped at reload? I've read vlan.dat is stored in nvram and should be saved after a copy run start, but that is not the case for me.I have since set the 2924 as the server, manually configured the server from vlan database, executed copy run start, and reloaded the switch. Oddly, my manual settings saved from the reload, meaning I only lose settings when the switch is in client mode.Am I missing additional necessary client commands to save the config, or is this just a limitation of either the 2924XL or the 12.0 ios?On a related but completed out of scope topic, without a cisco service contract, how am I supposed to make heads or tails of all the different versions of ios, along with the letter-based features and what-not? I can't even find my 2924 in the list of platforms when searching for ios upgrades.
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Sep 13, 2012
I have a above said switch at my remote office (600KM) which is connected with L2 Point to Point leased line. Both the ends I have Cisco 3950 catalyst switches with Vlans configured at both the ends. Now, for obvious reasons I should remove the other end 3950 switch and replace with Cisco 2950 switch. The other end 3950 is having 4 Vlans configured on 4 ports. Now my requirement is, I should configure 3 Vlans (one for P2P, one for 10 Desktops and one for to bring traffic from other network).
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Nov 15, 2011
i'm trying to type the command (config)#spanning-tree mode rapid-pvst on my Cisco 2950, but (config)#spanning-tree mode ? only shows me one option - pvst. I've checked the Cisco support page which suggests my version of IOS should support rapid-pvst.
Switch_1#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(13)EA1, RELEASE SOFTWARE (fc1)
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May 14, 2012
I cannot seem to correct a duplex mismatch issue.I have a Cisco 2950 switch connected to a Cisco 2621 router. I am running a per-interface Vlan. I have two fastethernet ports and one NM-1E card installed on the router. One fastethernet port is connected to my gateway router, the second fastethernet port is connected to my switch for one Vlan. The NM-1E Ethernet card is being used for the second Vlan which consists of nine IP cameras. Though the cameras on the Vlan are working fine.Now, the NM-1E card is set to half-duplex. I know that I should be using a fastethernet module like a 1FE 2W or a 2FE 2W card, (which I have,) but the router does not recogonize either one of these cards when they are installed, and yes, they have been confirmed as good cards.
Using Router-on-a-Stick configuration is out due to the bandwidth contention besides the fact that the router I am using it on will not handle this due to the flash being an older version.I have forced the switchport to half duplex, setting the speed to 10. I was getting fewer error messages at first, but they soon increased back to the frequency that they began with.I have set the switchport to duplex auto, but this failed to resolve the issue.Obviously, I cannot force the switchport into duplex full since the NM-1E interface is set to half duplex. Can the NM-1E card be configured to full duplex? I can't seem to find any documentation showing where it can be forced to full duplex mode.Could nine IP cameras just be too much for both the router and switch to handle?
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