Cisco WAN :: C2950 - Monitor Port Where Modem Is Connected From Host?
Jul 22, 2011
I have build topology like this:
host------c2950(f0/3)------(f0/4)c3550(f0/41)----modem-----Internet
I wanted to monitor c3560 port where modem is connected from host. So for that I configured rspan. configurate show below. But problem is that after configuration f0/4 of c3550 remains up and f0/3 of c2950 goes down. WHen I look at status of f0/4 it show "FastEthernet0/4 is up, line protocol is down (monitoring)". I tried to search websites It seems configuration is fine.
[code]...
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Apr 17, 2013
One of the ports on the 3750 stack was configured for VLAN121. It was changed to VLAN40 and the configuration saved. Both VLANs exist in the switch configuration. As soon as a host was connected (in this case, a label printer) the port VLAN reverted back to VLAN121.
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Jun 25, 2012
The current setup is as follows: Virginmedia Superhub in modem mode connected to one Cisco C2950 on port fa 0/23. The 2950 is connected to a Cisco C3550 over fa 0/24 via normal Cat 5e.Port fa 0/23 on the 3550 have a Astaro/Sophos UTM connected to it that acts as a Firewall/Wireless controller etc. The hitch, or maybe one of them, is that the 3550 and the UTM is on another floor from the 2950 and cannot be moved. The Virginmedia superhub can't be moved to the other floor either due to limitations in the cabling.What I'd like to achieve is for the UTM to pick up the public IP from the Virginmedia cable modem whilst no other devices on the Lan should be able to connect to the cable modem. All inbound/outbound internet traffic should go through the UTM for security reasons. The UTM have a number of available nic's that can be set to dhcp, static etc. I already have a number of VLANS on the router/switch and have half a suspicion that using another VLAN for this purpose might be the way forward but I'm not sure..
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Dec 2, 2011
I was very happy working with my WRT610N connected to the ethernetport of my previous internet modem. Recently I had to switch to a new modem CISCO EPC3925. Unfortunately this combination does not work anymore. I don't get an internet connection on my WRT610N anymore. I therefore have to connect all computers (LAN and WIFI) to this EPC3925. Especially for the WIFI I'm not fully happy. My IPAD2 sometimes does not want to connect, a problem which never occurred when connecting to WRT610N.
I probably need to change a setting, but where? In the EPC3925 or in WRT610N?
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Oct 23, 2011
is it possible to shutdown a specific port on my 3750x and monitor this port at the same time .for example , im dealing with a mac authenticated network using port security , i want to shut down all the ports that are not used at the moment , however , if some one gets connected to the one of the shutdown ports i want to know the mac address of the user or atleast to know that i have someone who is just plugged in to the one of the shutdowned ports .
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Jun 5, 2012
I have installed an SR520 with wireless for a client. They have asked if there is an easy way for them to monitor who is connected to the wireless at any given point in time. They are not capable of using the IOS command line.
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Oct 30, 2011
How can I monitor broadband usage of multiple PC's connected to a wireless router/modem?
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May 31, 2011
I am having problems accessing our internal network via VPN. We have an ASA at the perimeter that connects to a 3745 router and all of our networks come of that router. I can establish a VPN connection to the ASA but I can’t ping any of our internal host.
The internal network I need to access is 172.18.0.0. When I connect to the ASA I get a dhcp address from a pool created in the ASA, the pool is 172.200.1.x. I can’t ping from the ASA to the connected vpn host and I can’t ping from the host to the ASA ip address or to 3745 connected to it.
ASA config:
group-policy NAMEOFPOLICY internal
group-policy NAMEOFPOLICY attributes
dns-server value 172.18.2.2 172.18.2.23
[Code]....
route inside 172.18.0.0 255.255.0.0 172.18.255.1 1 Route on the 3745 back to the ASA ip route 0.0.0.0 0.0.0.0 172.18.255.2 I can’t see anything on the internal network, I can’t even ping the dns servers and so on.
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Nov 16, 2011
I've got the E3000 set up and working. What I'd like to do now is monitor all the devices' connectivity to it. The bandwidth it consumes and stuff. Is there a way to do that on my router?
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Jul 14, 2011
Does Cisco 3750 ip sla can monitor, let's say, monitor 3750 G1/0/1 port status, once it is down, then 3750 also make G1/0/2 also down. If yes, what is the command to do it?
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Mar 22, 2012
How do I monitor connections to the DMZ port on our ASA 5505 (via ASDM 5.2)? We have a WAP connected to it and it's intermittently dropping connections.
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Dec 21, 2010
Essentially, I have a spare desktop computer I'd like to turn into a web server, but my modem and wireless router are very difficult to work with. I installed Apache HTTP and successfully hosted a test page which can be accessed anywhere on the LAN. However, I'm having trouble setting up the server to be accessed from my external IP address.
I was supplied with a ZyXEL EQ-660R DSL modem by my ISP (CenturyLink) and bought a Netgear WGT624v3 wireless router in which to connect my laptop and spare desktop.
ZyXEL's website is not useful, and I don't think much of the problem is with the Netgear router. I've played with many settings and have tried to forward port 80 from the modem, but I've had no luck.
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Sep 26, 2012
on 7600 SUP720 3B.I have port channel and there are two ports on that port channel. is it possible to apply this command? does it work?
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May 24, 2012
I would like to ask about 3750 stacking and some Cat6 stuff...
1) How do we monitor 3750 stacking port in LMS?
2) Let say if I stack 3 switches, middle switch should be Master. Uplink should be at Top and Bottom. Is best practice?
3) Can we mixed 3750G and 3750X and what is result internal BW - fallback to 32Gps?
4) is there any Qos difference between WS-X6816-10G-2T and WS-X6816-10G-2TXL?
5) is there any Qos difference between MSFC5 PFC4 and MSFC5 PFC4XL?
6) What is main difference between PFC4 and PFC4XL in Sup2T?
7) Pls share more about Central and Distributed Switching in Sup2T and which card support Distributed DFCXL?
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Mar 4, 2012
I got one request from one of the user to allow his ip to access one public using port www, this needs to be allowed in Cisco PIX, if the below command is correct for this.
Source host : 10.84.11.1
Destination IP : 203.126.112.131
Port : www
access-list acl_outbound permit tcp host 10.84.11.1 host 203.126.112.131 eq www
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Jan 15, 2013
I have 3 x SG500-52P switches stacked. Vlan 1 is data and Vlan 3 is voice Port to Vlan membership is 1UP and 3T Port security is disabled
The issue I have is that I can have either a phone or a PC plugged into a port but not both. If I plug in both then the phone works and the PC gets an IP address (Broadcast traffic) but PC cannot browse the network.
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Jan 11, 2012
One of the persons involved in a home network has installed a Dlink DIR-825 Rev-B Extreme router on the Comcast cable system to allow a 'better' wireless signal on upper floors of the home. Two others involved in the same home network use a 'secure desktop access' software called NetOp to access the network remotely. To facilitate this software, we must 'port forward' port 6502 on BOTH UDP and TCP to the single system that is accessed.
However, this setup (simple port forwarding) does not seem to work - neither does 'virtual server', for that matter. Prior to this router being installed, it was extremely simple to accomplish this remote access using a Linksys router, so our software firewall configuration has not changed but the new Dlink seems unable to allow remote access.
How (and via which of these access methods - port forwarding or virtual server) would be best? This configuration seems frustratingly difficult to accomplish and I'm about to take the Dlink 'out' of the network and re-install the Linksys with a 'high-gain' external antenna to facilitate simple signal enhancement.
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Dec 6, 2012
I recently upgraded my internet service and received a D-Link DIR-815 from the company as they couldn't get our older router working with the new service (4G)
My brother plays Star craft and you have to forward ports to be able to host games for others to join, but it doesn't work.
I know how to port forward because our old router had exactly the same setup, but I have one issue though, when I look at the DIR-815's manual, and even in posts made by D-Link, I've seen them asking if the filters for the firewall are set to Endpoint Independent for UDP/TCP, now I know where this is, it's under Advanced/Firewall Settings, it even shows it there in the manual, but it's not there at all under my firewall settings, my older DIR router had it and we had no problems port forwarding, I'm not sure if it was removed in a later hardware or something?
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Apr 10, 2013
Basically after upgrade from ASA 8.4 to 9.0 (2) I have problems when certain types of NAT.Example:SA 8.4: nat (LAN, outside) 85 10.252.253.123 source static 192.168.3.2 192.168.3.2 192.168.3.104 static destination service http http In this form the host 192.168.3.2 uses the mapped ip (192.168.3.104) to access by http while other ports can be accessed using the original IP (10.252.253.123).
ASA 9.0: nat (LAN, outside) 85 10.252.253.123 source static 192.168.3.2 192.168.3.2 192.168.3.104 static destination service http http In this form the host 192.168.3.2 uses the mapped ip (192.168.3.104) to access by http but unlike before now I cannot access to the original IP (10.252.253.123) using another port or ping from host 192.168.3.2.
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Apr 22, 2012
I'm using an ASA5505 (8.4(1)) and would like to block port 80 on a specific host in the LAN so machines in other remote LANs connected via VPN can't access this port on the host. Devices in the local LAN should have access to this port on the host. Here are the commands I'm using:
-access-list block_port extended deny tcp any host 10.20.10.20 eq 80
-access-list block_port extended permit ip any any
-access-group block_port out interface inside
These commands are not working as I would expect them to. When I browse to http://10.20.10.20 from a remote machine over the VPN tunnel I am able to access the host web server.
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Apr 10, 2012
I have recently separated a few sites that I operate, into multiple virtual machines, all with their own IP.Basically, site A is located on for instance www.siteA.com, Site B is located on blog.domain.com etc etc. So my question is, how do I (with the Cisco RV220W), forward port 80 based on host?[URL]
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Oct 9, 2011
I have setup LAG for one of our 5508 controllers and have connected 4 of the 8 ethernet ports to a 4507 switch. After configuring 2 port channels on the switch we are receiving a host flapping error between the port channels and it seems to be causing a serious slowdown on the switch. When I shutdown one of the port channels the error goes away and traffic returns to normal. I have the same configuration at other locations with the only difference being the switches used are 3750G-12S and I do not see the host flapping error. It appears to only be a problem with modular switches.
One other thing of note: I read a Cisco white paper on LAG and it suggested creating the port channels over 2 different modules. For example, put ports G4/24 and G5/24 in port channel 1 and G4/25 and G5/25 in port channel 2. I tried this but I still got the host flapping error.
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Nov 5, 2012
Trying to allow inbound access from any host outside to my LAN server on port 995. [code]
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Apr 30, 2011
recently I had some malware on my Windows XP Professional (version 2002), so I followed a guide at Bleeping Computer [URL] to get rid of it. Problem is, for some reason, after I finished, I could no longer access the internet!When I try, FIrefox gives me their "could not connect" message: "Server not found. Firefox can't find the server at [site]." Check the address for typing errors such as ww.example.com instead of [URL]"When I try to log into MSN, the troubleshoot says I have a problem with my DNS and Key Ports.I'm not good with computers so I Google'd and found some ping-ing instructions. When I tried to ping [site], I get: "Ping request could not find host [site]. check the name and try again." This happens regardless of the site I use.Lastly, I tried "ping 127.0.0.1" from a troubleshooting site. It gives me: "Pinging 127.0.0.1 with 32 bytes of data:
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
[code]..
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Jan 16, 2013
I want to connect my tata photon device to my bsnl wifi modem via a usb portavailable on the bsnl modem. This is to provide a wifi network that i can use to surf the net on my phone.
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May 20, 2013
I have cisco 2651. It contains two FastEthernet interfaces: Fa0/0, Fa0/1.Fa0/1 has an ip address. Fa0/0 hasn't an ip address.I need to create monitor session from source Fa0/1 to destination Fa0/0. Then i want to connect my notebook to Fa0/0 to analyze some traffic from port Fa0/1
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Jul 6, 2012
I have an ASA 5520 and I'm using Solar winds real time interface tool to monitor the through put of the port. It seems I can never get it to use more than 100mb, where should I check?
I have run a sh int giga 0/1 and it shows the port is 1000mb full duplex and the I have also checked the other end where it plugs into the LAN and this also says the port is running at 1000mb full duplex.
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Jun 24, 2012
I've been using a WRT120N on a local area connection.The WRT120N acts as a gateway and also to connect to the PPOE connection, via a bridged adsl modem.I've noticed that the LAN port 1 was flashing although the network cable was disconnected from the physical port. I've restarted a few times but to no avail as well. Ever since that, I've noticed that connection through cable are unstable and hard.Now, I'm not able to reset or upgrade the router's firmware.Is there any other way to be done so that I can get this router working as normal again.
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Oct 10, 2012
What image i would need for my 2950 to enable DHCP snooping and DAI features (just for lab purpose)?
or are these features just available on the bigger modular switches (4500 and 6500)?
>sh ver
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(22)EA8a, RELEASE SOFTWARE (fc1)
[Code].....
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May 26, 2013
I have a C2950 Switch & I am trying to upgrade the IOS version of it so that I can proceed with learning about SSH. My current version of 12.1 does not have Enhanced Imaging. I am so new to Cisco, that I have spent hours trying to find the correct page, or link, or anything that can enable me to upgrade to a later version.
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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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Jan 7, 2012
I am running DHCP snooping for VLAN 1 on below switch
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(22)EA4a, RELEASE SOFTWARE (fc1)
Model number: WS-C2950-24
Looks like below IOS does not support snooping.
Model number: WS-C2950-24
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(14)EA1a, RELEASE SOFTWARE (fc1)
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May 15, 2013
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I have tried a few different pieces of software (mostly Eltima software), and have Google'd every combination of phrases that I can think of. I can't find any information on this anywhere. I don't just need to share data between the machines, I need a more "physical" connection.
Does any know how to do this, or if there's another (preferably more simple) way of doing it?
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