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.
View 3 RepliesI 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.
I have a 3925 Router with a 48 port switch module (part number SM-D-ES3G-48-P). I have no problem accessing the 3925 Router, but when I go into the 48 port, I get an error that reads
Error Hardware not supported by firmware. Try loading a newer software instead. System Resetting...
I know that the wrong IOS is installed on the switch, but the problem is that this is an endless loop. The switch resets then comes back to the same error. How to get the switch out of this loop so that I can load the correct IOS.
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).
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?
View 7 Replies View RelatedI have a couple a questions answers on which i cant google for a period. BTW maybe i simly use wrong aproach to choose keywords.
1) Is it possible to assign same ip address to the same client each time it authenticated, preferably without using DHCP? Im definely sure that it possible but cant find corresponded configuration examples (my device is Cisco 1921 with IOS 15.0.1).
2) Is it possible to assign dynamic crypto map to loopback interface (the purpose to make EASY VPN Server accessible through two interfaces - maybe you recommend other approach instead?) - as i move workingcrypto map from phy int to loopback - i cant connect with reason "Phace1 SA policy proposal not accepted"
I need to NAT a port range spanning from TCP and UDP 50,000 to 59,999 from inside global address 58.96.x.x on loopback2 to an inside local address of 192.168.5.5.Currently all the existing NAT translations are 1-to-1 that map inside global addresses on a wide span of Loopbacks and a Dialer Interface to inside local addresses on few subnets which are fine.I'm using an 1811 with an ADVIPSERVICESK9-M image, version 12.4(6)TS
View 1 Replies View RelatedCan a layer 2 cisco 2950 switch be used as a dhcp server with it's own address pool.
View 3 Replies View Relatedcant assign cisco switch 3560G port g0/1to access vlan 10
main-switch(config-if)#switchport access vlan 10 Command rejected: Gi0/1 not a switching port.
How to create loopback cable for gig copper port (cisco 6513).I
View 3 Replies View RelatedI 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?
There 's a Cisco IP phone that sits between a PC and the switch port. On the switch port, no MAC address is learned. However, the switch is able to detect the IP phone and deliver power to it:
TNSWACCS04A1#sh power inline fa1/0/13
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa1/0/13 auto on 5.0 IP Phone 7911 2 15.4
[code]....
Switch is Catalyst 3750 with IOS version 12.2(58)SE1
There 's a Cisco IP phone that sits between a PC and the switch port. On the switch port, no MAC address is learned. However, the switch is able to detect the IP phone and deliver power to it: [code] Switch is Catalyst 3750 with IOS version 12.2(58)SE1.
View 1 Replies View RelatedProblem is that at some C65K I have directly connected Unix servers and the don't show MAC address at port, and same has happened at 3560 switched where I have too Unix based equipments connected. When use show mac-address interface XXXX, nothis appears at port and tested them with other equipments that worked fine.
View 2 Replies View RelatedI understand you can't assign an IPv4 Address to a "port". But here's my issue. I have two network cables attached to a managed switch, the location of the two cables are very important. Two computers attached to the said cables.I would like to communicate with one of the computers on PORT 1 and PORT 2, regardless of what computer is plugged into them. They get there IP's via DHCP, and a static IP wont work - as the computer plugged into PORT 1 or 2 may be different.So. I have two ports on the switch that I always want to communicate with the computer on the other end. But I don't (will not) always know the IP address of the computer(s) connected.
View 12 Replies View RelatedIs there any way to Mirror a CISCO C3750 Switch Port Taffic to a remote Host IP Address?I know Port Mirror (SPAN/RSPAN) can copy one Interface Packet to another Interface. But I am looking for a way to miror Switch Port Packets to a remote Host (having Public IP Address and running Wirehark). Is it possible?
View 9 Replies View Relatedwhat is the use of no switch port command in L3 switch?
View 7 Replies View RelatedI volunteer at a school who just purchased two 48 port SGE2010 managed switches. I am not a big fan of the web gui and was hoping to see the standard Cisco command prompt instead of the menu-type interface.
Is there a way to view the MAC table showing which MAC address is plugged into which port on the switch? I have been fighting with the menu and the gui for a while now and do not see this anywhere.
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.
View 3 Replies View RelatedWe 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.
View 4 Replies View RelatedI 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
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?
What is the purpose of loop back testing.
View 2 Replies View RelatedOne 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]
View 18 Replies View RelatedCan'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]
View 17 Replies View RelatedI'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.
View 8 Replies View RelatedAt 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 ?
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
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.
My customer wants each ACE4710 (of a highly available cluster) to have its own, dedicated port for management purposes.
According to documentation, IP addressing can be applied to VLAN interfaces, so in order to satisfy the requirement, I should make one port belong to an "access VLAN X", and then apply IP addressing to the corresponding "interface VLAN X". This should satisfy my customer´s requirement in an indirect way.
But... ¿ Can´t I just configure IP address on one of the 4 ethernet ports in order to save the work of building the aforementioned VLAN? I am asking this since I do not have access to a real box in order to verify.
I don't do a lot of networking however during a cisco lesson the other day my lecturer briefly touched upon loop-back tests, would it be okay for somebody to very imply sum up exactly what loop-back tests do in a couple of lines and how they are carried out? (not in detail, so literally for example - a wire is put in from one end of the network to the other etc.) I don't really understand all the different wiring types etc.
View 4 Replies View RelatedI am working with a device that does not have a physical reset button on it, and have mistakenly typed in 127.x.x.127 for it's IP. I was trying to use 172, but mistyped and didn't catch it until after I had rebooted the unit. Is there anyway that I might be able to gain access to the device. My PC is running Windows 7, but I am familiar with linux as well. I have attempted to change the loopback adapter IP to 128 on a ubuntu live disc and set my ethernet port to the subnet the device is on with no avail. (I am also using vlans on the device, but believe I have them set up correctly)the device is set to IP: 127.x.x.127 netmask 255.255.255.128. [code] I know that the last octet of 127 is the broadcast IP for the range, but have been able to address similar blunders before by forcing myself to a /24 subnet to correct that.
View 5 Replies View RelatedI recently replaced a client's router with a Cisco RV 120W. The client employs a web-based application on an internal server that manages their business. Workers in the field use a handheld device power by WIndows Mobile to access a mobile version of the the web-based app. Data contained on the mobile app syncronizes with the server when workers choose a sync menu. Some workers perform this sync in the field, others wait till they return to the office and use the wireless provided by the router. Prior to changing the router, the synching worked fine either inside or outside the company network. The mobile app accesses the internal server via the router's public IP address. The router forwards the http requests to the internal server. But now the synching does not work internally. I assume it's because the Cisco RV 120 W does not support NAT Loopback, or I simply haven't figured out how to enable it. Does anyone know how to enable NAT Loopback on the RV 120 W so I can access the web-based app by through the router's external IP while on the private side of the LAN??
View 2 Replies View Related