Cisco :: No MAC Address On Switch Port?
Apr 16, 2012
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
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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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Apr 15, 2012
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.
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Mar 6, 2013
Problem 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.
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May 31, 2013
Is 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?
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Jul 31, 2011
I 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.
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Oct 13, 2009
Is it possible using any module in CW to get the MAC address and IP address of all switchports on a 6500?
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Oct 12, 2012
Is it possible to create a service which will forward public port 9010 to an internal IP address with port 23?First of all, I do not like to open the public Telnet port to the inside so I would use another public port and second my ISP does not allow some public ports beneath port 80?
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May 8, 2012
On the supervisor card of a cisco 6500 series, according to the following link, [URL] it only has 2 uplink ports on the card. Would I be correct in assuming that I only have those to ports that I can configure IP addresses on?
The cisco that is being devlivere is coming with a 48 port switch and 24 port fibre switch. Could I change any of those ports into a router port and configure IP addresses on those?
The supervisor card is a ws-sup-720-3b the 48 port switch is a ws-x6748-ge-tx the 24 port fibre switch is ws-x6724-sfp
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Jun 5, 2013
I'm fairly new to Cisco products am in the process of developing my network knowledge on a deeper level. I have a 3825 with a HWIC-4ESW and I'm struggling to fully understand how the two "see" each other. I've setup a V LAN with a layer 3 address on the HWIC and added the switch ports to it. This seemed to allow devices connected to the switch ports to talk to the built-in router ports. I thought this was all making sense until i applied an access-list to the router port. It's a simple ACL i'm just using for testing and the only thing it does is blocks telnet from anywhere. I know the ACL is setup properly because if I connect a device directly to the router port i cannot telnet to the port. However, if i connect a device to one of the switch ports, i am able to telnet to the router port successfully.
It seems that I'm missing something with how traffic flows from the switch port to the router ports and how the two "see" each other.
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Dec 28, 2008
what is the use of no switch port command in L3 switch?
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Feb 26, 2012
I was looking for a way to connect an AUX port from a 1700 router to a 6500 switch module console port, to see the output of the Switch's on the 1700 router, in case there is a network downtime, I could see what's going on in the switch, what cable should I use ? Also, is there is any kind of documentation for this type of config what have I seen is very few info.
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Apr 16, 2012
I am planning to put a switch in between ISP and Router.( WAN section)
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Nov 29, 2011
i need to Forwarding to IP Address 192.168.11.61 [code]
What is the command should i give and how can i apply in my router as per my above mention required ?
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Jan 9, 2012
I'm in need of a device which can switch to several items which has the same mac address. I heard that there may be devices that can handle this, by for example mapping fake unique mac addresses in the switch to each on of the same mac addresses on the devices, so when you try to send something to a "device with the same mac address" you send it to the faked address in the switch and the switch just forwards it.
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Aug 18, 2011
I just need to know what numbers to put in this Server IP AddressI tried putting a 0 and 1 at the end.
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Jul 6, 2011
I have the following scenario. Connected to a Cisco 3560 switch (fa0/9) is another Cisco switch (that is operating at layer 2). On the other side of that second switch is a firewall. I want to send traffic from my Cisco 3560 switch to a network behind the firewall. [code] However, when I try to add the ip address to int fa0/9, I get an error. Right now, the 3560 is operating at layer 2. I think that I need to issue the command: "ip routing" to put it in layer 3, then put the ip address on port fa0/9. However, I am concerned that I will mess up my production environment. Is there any other way of doing this? The "ip route 0.0.0.0 0.0.0.0" statement sends traffic out the gateway to the Internet. I just want to send packets to 209.52.62.16/28 out int fa0/9.
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Jul 13, 2012
I'm in need of a device which can switch to several items which has the same mac address. I heard that there may be devices that can handle this, by for example mapping fake unique mac addresses in the switch to each on of the same mac addresses on the devices, so when you try to send something to a "device with the same mac address" you send it to the faked address in the switch and the switch just forwards it.
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Aug 15, 2012
I 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.
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Feb 27, 2013
I have asked this question in server fault but not getting good answer.Can Cisco switch detect mac address if driver is not installed?
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Dec 28, 2010
I am getting following error in Cisco 6509 switch.BUt there is no impact in the switch.
: %MAC_MOVE-SP-4-NOTIF: Host 0000.0c07.ac01 in vlan 694 is flapping between port Te8/1 and port Te7/1
29:33.959: %MAC_MOVE-SP-4-NOTIF: Host 0000.0c07.ac01 in vlan 269 is flapping between port Te7/1 and port Te8/1
[Code].....
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Feb 3, 2013
i have a SG300-52 Switch, route mode is enabled, and it is using the latest IOS.I have created 4 Vlans in this switch, till this point its OK, but once i try to give ip addres to the created Vlan either from the GUI or CLI the switch is not responding. i have to go and manually reset the switch using a pin.
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Feb 5, 2012
I am trouble shooting a SF 200-48P and I am a bit lost without a CLI not used to the GUI. What I need to know is how to add the IP address helper command to the switch?I have a number of IP phones which are not getting an IP address from DHCP (PCs which are diasy chained off the phones are all working correctly). On the higher end switches I would have added the IP address helper command to the VLAN and that would have sorted it. How to do this on the small business switch.
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Oct 28, 2012
Our company uses a commercial copier monitoring package called FMAudit to obtain meter readings from our clients' copiers, and it uses a feed to send the readings back to us. We have used port 90 for this purpose.Due to a recent server crash and emergency reconfiguration of our network, we have moved our FMAudit central server from in-house to a hosted service, with of course a different external IP address.
Without interfering with our other systems, is there a way to redirect JUST PORT 90 to another IP address external to our own? I don't care if it has to happen at the router or server level. We are using Server 2003 and a Cisco 887VAW.
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Apr 24, 2012
I have been asked to "forward a port on an ASA 5505 to an internal ip address." Sounds easy for most of you, and I thought I did it right, but I am not certain. Basically, they want it set up so that when xx.xx.xx.xx:30000 (x's = the firewall ip with port 30000) is accessed from outside, it is forwarded to an internal ip on port 30000 (xxx.xxx.x.xxx:30000)
Here is what I tried from within ASDM 6.4:
1. NAT Rules-add static NAT route:
original-Interface: inside
-Source: xx.xx.xx.xx (local ip of computer on LAN they wish to access from outside)
Translated - Interface - Use Interface IP Address
Enable PAT: Original and Translated port both set to 30000
2. Access Rule - add
Interface: Inside
Source: any
Destination: xx.xx.xx.xx (IP of Firewall)
Service: tcp/30000
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Nov 3, 2011
At one of our client premises they have an Cisco 1841 router. We need to connect from outside (other location in another country) with Remote Desktop connection port 3389 to an internal IP address ( a server).From any IP address it have to permit a connection on port 3389 to be forwarded to the server.
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Dec 27, 2011
I have Cisco ASA 5505 Firewall with security plus license, Currently I open ports on 25,80,443 on public IP address 1.1.1.1 and perform static nat between the inside and outside IP address Such as i configured via CLI
access-list OUT_IN extended permit tcp any host 1.1.1.1 eq 80
access-list OUT_IN extended permit tcp any host 1.1.1.1 eq 443
access-list OUT_IN extended permit tcp any host 1.1.1.1 eq 25
[Code]......
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Jan 25, 2013
My ISP assigns IP's through a standard motorola cable modem via DHCP server. I can pay extra for a persistent IP which uses the MAC of my switch and assigns an IP. Is there a way to get multiple public IP address's from the modem using a switch?For example. Can I plug the modem into the switch and then plug a computer server into the switch and get an IP assigned to that servers MAC address and then also have another server attached to another port on the switch and get a different public IP for that servers MAC address?
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May 5, 2011
I have a Netgear FSM750S 48 port managed switch that I inhereted from the previous LAN guy who was gone before I got here. I don't know what IP address he was using for the swithc - I have a decent guess for the username/password; but I'm not 100% sure on those either. how can I determine what this devices IP address is so I can telent into it? Do I have to reset the switch to factory config? And if I have to reset it, how do I do that? There aren't any factory reset buttons anywhere on the chasis. [URL]
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Mar 19, 2013
My setup is as follows: as a part of a global network, I have two separate measurement stations collecting data in the field. They are working with some kind of embedded linux system and is running an FTP-server so that I can download collected data. I have some control over the stations, which e.g. means that I can select the port used for the FTP-server (default is 21).Unfortunately, for this particular set of measurement stations, they are connecting via FTP-over-radio-link to another station which is connected to my computer via a router (on the server-side) and I can only "see" their common external IP address. If I have understood this correctly, they can not use the same port for FTP traffic, right? The router used is some (for me) unknown brand with unknown capabilities, so I don't expect/want a solution at that end.Now, to my problem: as a part of this global network there is a custom software running on my computer that automatically connects to all the different stations to download and process the data. This software runs on any recent version of Windows, but I'm running Windows XP right now. There is no way for me to modify this software at this point (for the future, maybe, but not now), and unfortunately it has a severe limitation: it MUST use port 21 for FTP-connections.My first attempt was to set the FTP-port to 2121 for one of the servers and create another IP address on my client network adapter and try to forward port 21 of this new IP to port 2121 on the server/router side, but due to lack of knowledge and experience I did not manage to get this working fully.
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Nov 10, 2012
Been looking around in my routers settings for something that even comes close to limiting bandwidth on a specific port, or mac address, but the only thing I can find is priority settings like "Low, Normal, High, and Highest" I did however see this:
I am not 100% sure if I can specifically set bandwidth limit per port or mac address, cause I don't see an option to do that, so I presume it just limits the whole network as one...
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Oct 28, 2011
is there any way to interact with wan port like LAN?i have connected a rocket m5 as a bridge to my Dir-615 wan port but i cant see the AirOS login page (rocket m5 configuration page) nor brige's ip address on my LAN...is there any way to interact with the ip address that connected to wan port?
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Feb 1, 2013
I have been reading the postings on this site trying to retrieve the MAC address for the client devices (computers, printers) attached to our switches. We have approximately 500 switches and I need to map the mac address to the switch. It appears the OID information is for SNMP v2. We are restricted to using only SNMP v3. I have tried using the Cisco SNMP Object Navigator without any success.
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