Cisco WAN :: No Link Between 2620 Router And 2950 Switch
Oct 26, 2011
Can't get cisco router and switch to see each other? When I connect the 2620 router to a 2950 switch no link lights turn on. It's the same when I connect any router to either of the two 2950 switches I have. I can connect to both switch and router from a pc using telnet and the router can connect to a regular tp-link switch. I'm a newbie when It comes to Cisco. Here's the running config for the router and switch. There Is no connection when using any of the switch ports to connect to the fa0/0 of the router. [code]
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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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Jun 26, 2012
I have some 2620 routers and 2950 switches that have Console Ports that are serial. However my HP PC w.Win 7 dosent have any serial ports. I am looking for a USB to Serial converter that will allow me to access the console ports so I can configure these devices. I've read many old posts and still havent found a solution. Is it true that none of these cables work? Anything that will work on XP? (also have XP PC's).How about a RJ45 to Serial?? How about a PCI Serial card? I cant believe Cisco hasnt developed a conversion cable to use with their Console Cables?
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Jan 16, 2011
is it possible to assign a loopback address to a typical switch port on a 2950 switch? I want to be able to have some devices connected to a switch to test access lists and VLANs.
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Sep 28, 2011
We have installed last Network Assistant version, 5.6(3), but we can't add any switch to it.... It says always "Unsopported Device type: unknown".Our switches are all 2950, 2960 and 2970 models.
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Jan 10, 2013
Im looking to connect up 4 new pcs to network but I don't have enough wall ports. I thought I could plug cisco 2950 switch into the port on the wall and act like a hub. The switch configuration is default and there is only one vlan. How is it that it won't connect. Does it need a crossover cable.
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Dec 27, 2010
I just started configuring my cisco catalyst 2950 switch. Basically im preparing for my CCENT exams my basic configuration is as follows.
-My Laptop is connected to the console port
-I'm connected to the internet via my wireless
-I'm connected to the switch port via my NIC card
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Feb 16, 2011
I need to update the software for the switch 2950 we have in our LAN. Its been 6 long years I have not looked at this switch and so now is the time since I have had some issue (ie. Outlook losing connections and once in a while email get send out AGAIN for bazzarre reason)
Anyways, I am looking here for thes software I am abit unsure which software to use via Network Assistant. This is the current status of the switch (Cisco 2950, WS-C2950T-SI, 12.1(22)EA4a - C2950 - I6Q4L2-M ). I want to understand what is the difference between C2950 EI AND SI IOS CRYPTO and web based device manager and C2950 EI AND SI IOS IMAGE AND WEB BASED DEVICE MANAGER and which one should I be using for my switch?
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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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Feb 11, 2012
I've connected a dslmodem/router to a fast ethernet port(fa0/1) on a 2620 router.There is a 2950 switch connected to the other port (fa0/0).I can ping the Internet via the router but and the switch but not from a host connected to the switch.I can't reach the dslmodem from the host pc.I've configured nat(overload) on the router.
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Aug 28, 2012
At home I have a perfectly working test setup for more than 1 year now , but yesterday we had a power down for about 10 minutes in the whole area , after this power down nothing was working in my network any longer.
My Network is has follow :
ISP(Cable Modem) on FA23 from the CISCO 2950 SWITCH (24 Ports)
ROUTER (ON A STICK) on FA24 from the CISCO 2950 SWITCH
And the rest of the switch is FA1=VLAN 1; FA2=VLAN 2;FA10=VLAN 10
Our home network is connected to VLAN 10 with a IP Range of 192.168.10.x /24 After this power down , I was not able to look into the SWITCH via FA1 , the FIX IP in this switch was 192.168.1.251/24, the ONLY way to get access was via the consol port !!!What a suprice when I connected my consol to the PC , I can see ROUTER_F342 , my router config is called ROUTER1841 and my switch config name is /was called SW24.So it seems that after this Power Down , the router took or received a config from my provider ?!?
I have recovered the the file in the switch + the vlan.dat and now everithing works again.
How can I avoid that this switch receive again a wrong file , I have all the needed files on the products itself and I do not use a TFTP server.
I have atached some screen shot when my switch is starting up , and it seems that the switch receive a IP address from my ISP , I do not know why, in the config file I have given it a FIX IP 192.168.1.251/24 ?!?So it seems that my ISP erase the config file and when the switch is empty ,the swich look for :
tftp://255.255.255.255/router-confg
tftp://255.255.255.255/ciscortr.cfg
Etc ....
Until it find something.
I have tried after a complete recovery to switch off the power again for 10 minutes (ISP MODEM + SWITCH + ROUTER) and I was not able to reproduce the fault.Can it be that due to this power failure in our area that some routers or switches send or broadcast this kind of things ?
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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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Mar 4, 2012
On firewall we have zone created for dmz and ip is 192.x.x.x and it is connected to 2950 switch(DMZ switch) with vlan 25..We have L3 switch on this we have created vlan 25 and connected cable from L3 with 2950 switch with vlan 25
As we have the servers on L3 and wanted to bring on dmz zone we have connected a cable.Now the problem is when i connect a pc on 2950 switch (directly on dmz switch) with access-list below we are not geeting any hist on it.
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Mar 14, 2013
We are getting "Warning: Saving this config to nvram may corrupt any network management or security files stored at the end of nvram.” And “% Configuration buffer full, can't add command: a0/14” message. " message, when we try to save the configuraiton in one of the 2950 switch.
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Mar 25, 2012
I have cisco 2950 catalyst switch, verson IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(20)EA1a, RELEASE SOFTWARE (fc1)
So. for one of my port (FE 0/3) i need to put the bandwith limit 512 kbps, how to configure the above same.
Note:- I configured the below but no effect
1. interface FastEthernet0/3description * CONT TO B-CENTER *switchport access vlan 10switchport mode accessbandwidth 1024speed 10
2. and there is no srr bandwidth limit option for 2950, but the same is working for 2960.
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Aug 13, 2012
Do they have a default IP assigned to them?
I'm trying to access the CMS administration page from my browser. I've already tried 192.168.0.1 and that brings up my gateway (cable modem from Time Warner).
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Jan 5, 2012
I upgraded a Catalyst 2950 switch and there wasn't enough room so I deleted the flash. The upgraded went well using tftp. It booted up fine. The I0S version includes crypto. But, I can't access switch via web browser or CNA. Port scan shows port 80 0pen. What am I missing?
Here is the flash.
Directory of flash:/
2 -rwx 112 Mar 01 1993 01:00:48 +00:00 info 3 -rwx 3722814 Mar 01 1993 01:02:58 +00:00 c2950-i6k2l2q4-mz.121-22.EA14.bin 4 drwx 4416 Mar 01 1993 01:03:45 +00:00 html 331 -rwx 112 Mar 01 1993 01:04:19 +00:00 info.ver 332 -rwx [code]....
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Nov 15, 2005
My switches is still operating but when i ping the switch, there isn't any reply. No icmp reply from catalyst 2950 switch
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Nov 4, 2012
I am planning to change the management IP (VLAN 5) to one of my Cisco 2950 switch, Here I am creating a new VLAN101 and assign new IP
When I am doing this VLAN 2 is going admin down.
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Nov 3, 2011
My requirement is that I want to set same console password in 12 switch instantly...
All the 12 switch are connected to a cisco 6500 L3 switch..
So how can i do that.. i have cisco acs 4.1...
can i do that by cisco acs 4.1 if not tell me an software or command ...
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Oct 1, 2012
My customer has various Cisco switches but only cisco 2950 switches has the problem of ping timeout or reply time is too long(average more than 2 sec). It will cause I Network Mangement software alarm always.
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Jul 17, 2012
I have 2950 switch booting through MOnitor Mode.Analyzed there is no Cisco IOS image in flash.
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Jun 6, 2011
We have 10M internet link and the router is 2620 we want to change it to a higher up......which one would be the best one?
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Feb 12, 2012
I have a cisco 2950 switch, connected with 4Mbps of internet and number of users will access the internet. There is no restraction on bandwidth limit for users, if any body use high download the remaining users are facing the slow browsing problems.
So, if i can put a bandwidth limitation for every users the problem will be solved. how to restract the bandwidth on user bases.
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May 3, 2013
I am trying to configure 802.1x RADIUS Authentication on cisco 2950-24TT-L Switch. I am using following set of command as given below
Switch# configure t
Switch(config)# aaa new-model
Switch(config)# aaa authentication dotx default group redius
Switch(config)# dot1x system-auth-control
Switch(config)# inter fasteth 0/1
Switch(config)#dot1x port-control atuo
I am facing problem dot1x command is not working on interface.
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Jan 9, 2012
I would like to know if ip helper-address feature is working on a layer 2 switch (2950,2960) or you should use a Layer 3 switch to do that?
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Feb 11, 2012
With out using any server, will DHCP be configured in cisco 2950/2960 switch?I man cisco it self should work as a dhcp server also.
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Apr 15, 2010
I have two 3560G 24 port switches. Each of them connects to some 3560G or 2950 switches. Trunks between 3560G are set as 1000/full. Trunks between 3560G and 2950 are set as 100/full. show int status also shows the interface negotiation is 100/full for trunks between 3560G and 2950. The issue is I keep getting outdiscard errors in trunks between 3560G and 2950. At 2950 switches, I see Recv-errors too. I checked all the trunks traffic. They are totally not high. Only serveal mbps. Most time even lower than 1mbps.
I googled this kind of issue online. I see it could be possibly caused by high volume traffic higher than the capacity. But it appears the traffic there is not high enough to cause this kind of issue. Is there any possiblity that could cause this problem?
The below is 3560G trunk configuration for 2950 switch
interface GigabitEthernet0/10 switchport trunk encapsulation dot1q switchport trunk allowed vlan 1-122,124-4094 switchport mode trunk speed 100 duplex full srr-queue bandwidth share 10 10 60 20 queue-set 2 priority-queue out mls qos trust cos auto qos voip trust
the trunk configuration at 2950 switch: interface FastEthernet0/24 switchport trunk allowed vlan 1-122,124-4094 speed 100 duplex full
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Feb 13, 2012
As always, the Cisco LMS is keep sending the follwoing high discard error from the Cisco switches WS-C2950T-24:
EVENT ID = 0004SX3
ALERT ID = 00019LF
TIME = Tue 14-Feb-2012 08:56:35 GMT
[Code].....
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Nov 3, 2011
In my lab, there are some machines that are connected using Cisco 2950 switches. Those machines belong to a VLAN.Now I need to modify the VLAN settings of the machines and as such I also need to modify the VLAN settings on the ports on the Cisco switches.
In order to do this, first I need to login to those switches, but due to a lack of knowledge transfer, I don't have the password. Is the some generic password?Second I will need to modify the VLAN settings on each individual port. How can I do this?
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Jun 23, 2011
I have two WS-C2950G-24-EI switches each of which were running software version 12.1(22)EA2-C2950-I6Q4L2-M. Both swtiches were viewable from Network Assistant version 5.6(3) and part of a community. I then updated the software on one of the switches to 12.1(22)EA14, and now Network Assistant will not add the new updated device to the community and gives an error of "WS-C2950G-24-EI is not supported as community member". Is the latest version (12.1(22)EA14) not supported by Network Assistant? The release notes indicate the Minimum Software Release is 12.1(22)EA4.
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Mar 20, 2013
I am trying to setup a cisco 2600 router that will be used to connect to a Qwest internet T1. I will have a Cisco ASA firewall behind the router so that I can build a site to site VPN tunnel. Qwest requires PPP encapsulation. The Lan side network is 10.2.0.0/16. Qwest gave me their serial IP address and my serial ip address which was I used to configure the route. The ethernet interface was configured for the local Lan side subnet and i natted both the inside and outside interface of the router. I am not sure if this is correct. How do I configure the router so that I can use one of the available public IP Addresses as the outside interface of the ASA?
Here is the config of the router:
version 12.2no parser cacheno service single-slot-reload-enableservice timestamps debug uptimeservice timestamps log uptimeno service password-encryption!hostname cedar!logging rate-limit console 10 except errorsenable secret 5 xxxxxxxxxxenable password xxxxxx!ip subnet-zeroip audit notify logip audit po max-events 100no ip dhcp-client network-discoverycall rsvp-syncinterface FastEthernet0/0description Lan Interfaceip address 10.2.1.1 255.255.255.0ip nat insideno ip route-cacheno ip mroute-cachespeed autofull-duplexno mop enabled!interface Serial0/0ip address 65.121.x.x 255.255.255.252ip nat outsideencapsulation pppfair-queueservice-module t1 clock source internalservice-module t1 timeslots 1-24!ip nat inside source list 1 interface Serial0/0 overloadip classlessip route 0.0.0.0 0.0.0.0 65.121.x.x (qwest serial IP address)ip http serverip http authentication local!access-list 1 permit 0.0.0.0 255.255.0.0
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May 26, 2013
how to recover password and retrive configuration on Cisco switch 2950 and 3560.I know the way to press and hold the mode button and then plug in the power cord can reset the switch to factory default but it will reset everything to nothing. As such, it is not what I want and I want to keep the configuration file and able to use the configuration on the switch.
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