Cisco Switching/Routing :: 2950 Router On Stick / Pinging Sub-interface
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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Aug 4, 2012
last day i went to one client for the installation of C(WS-C4507R+E)
current ios :cat4500e-ipbase-mz.122-53.SG2.bin
there is only one sup engine installed and redundant slot is empty.
I installed one ethernet module in the slot 6 and it get detected working fine. I also want to install one fiber module but that module is only supported by 12.2 54 sg or later ios version.so i need an ios upgrade.
For the ios upgrade I decide to do it through svi interface For that i igive an ip address to vlan 1 (192.168.1.2) and plug cable in gigabit 6/1 and added that port into valn 1.
my laptop's ip is 192.168.1.1 @ this point i faced a rare problem the PING IS NOT WORKING.(switch is directly connected to my laptop).
Then i create another VLAN (2) and add that port into vlan 2 still ping is not getting.last thing i tried is that making that gigabit port into a routed port and result is same.
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Nov 30, 2012
It doesn't seem like I can set up trunking (dot1q) on this device. Isn't it supported on this device? Can I still set up VLANs with the router-on-a-stick concept working internal in the device, i.e no external interfaces/subinterfaces being configured? If so, can I then connect VLANs to other switches? I have:
-876 ISR
-Catalyst 2960
-SLM2008
I know the small biz switch supports VLANs and I think trunking as well--obviously the 2960 supports it. Is there a way with these devices to configure one VLAN for servers/net devices and another for regular end-user computers so that they still talk to one another, or do I need a different router in the mix?
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Feb 27, 2013
I have not been able to figure out the resolution. The basic premise is to have 3 inside vlan networks controlled by a 1900 series router. Then have that primary LAN router connect to the inside of my ASA5505 Basic, then go out to my ISP Gateway. I have tried hundreds of different static route configurations on my router and asa. I have tried equally as many NAT and PAT configurations, but nothing seems to work. I have even tried using all the commands (specific to my topography of course) on this weblink from cisco: url...
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Jun 1, 2012
I am trying to configure router on a stick with 2811 and 3750, but I just cannot get it to work - vlans are not getting propagated from 3750 to 2811: 3750:
Code...
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Mar 17, 2013
i have a simple router on a stick config which is providing dhcp to a customer SSID. however i don't want employees to stay on it and eat the band width since its open. the lease is set to an hour, is there anyway that i could set it so that once your lease expired it can't be renewed for 4 about 8 hours? I am using a cisco 2600 router in this setup.
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Jan 20, 2013
Everything in my network works as a charm. Every host in my vlans can access and ping the internet with no problems. But, my main router does not ping the internet (Pinging either ip "173.194.71.104" or domain "www.google.com" do not work). I don't know how is that possible since my hosts can ping the internet. Below is my main router confiurations
!
hostname Internet_Router
!
boot-start-marker
[Code].....
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May 29, 2013
I am getting RTO while pinging my L3 switch 3750 that happened after restarting switch,i have restarted it because I am not able to browse internet through URL,i am able to do it trough ip address, so I restarted it not I am getting RTO.
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Jul 10, 2012
Has anyone implemented a working Nat on a Stick?I am looking for 3750 configurations for Nat on a stick.Our users need to access the camera monitoring from home as well as in work.We will like to setup the monitoring software with public address (and port) of the cameras, as the users use the same configuration at home and work.DNS will not work for us as the monitoring settings only accept IP.
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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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Nov 1, 2011
We have a Cisco 3640 router running c3640-is-mz.123-3g.bin Switching ports are devided into several VLans. Each VLan has its own IP subnet. We can't ping IP address X in subnet A from subnet B unless we log into the router and ping it from there first. (and then the IP address will show up in "show ip arp" command. Then we can ping X in subnet A from subnet B, and browse web on device X from subnet B, etc. )
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Feb 2, 2012
I'm having an issue routing between vlans. I have vlan 1, and 2. I want to ping something on vlan 2, from vlan 1. I cannot ping from a computer on vlan 1 to a computer on vlan 2. I can ping each computer from the ASA 5505. I get an error on the ASA when I try to ping from the computers. The error is Failed to locate egress interface for UDP from voice:192.168.0.199/137 to 192.168.1.200/137. I can't understand why it even mentions IP 192.168. 1.200/ 137... I reset the unit configuring it from scratch and still no go. I have no given a static route to the out yet.. I need to get inter-vlan routing working first. [code]
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Feb 4, 2013
i configured the VLAN810, with DHCP services, while i try to ping the host which is connected to gi 1/0/2 from my gi 1/0/1 , i can't ping the same vlan host , while i try to debug ip icmp its showing ,
C3750XB11#sh running-config
Building configuration...
Current configuration : 12053 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
[code]....
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May 1, 2012
I have got new cisco ASA 5580 running 7.2(4) on it when i am trying to configured Virtual interface on vlan 400 in Gi0/0.400 to LBASE.now the problem is from my MZ zone 10.242.107.17 to Lbase virtual interface 10.242.103.1 iam not able to ping.
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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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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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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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