Trying to find out if a switch learns a mac address of a connected device which only sends broadcasts to the switch port (no unicasts). For example one type of attendance terminal...
View 14 RepliesI have an AS-external route being redistributed into OSPF from a static route on one of my routers. I recently changed the static route from a /24 to a /26 and all of a sudden the link ID of the segment in the OSPF database went from the network address to the broadcast address: Code:
View 5 Replies View Relatedwe manufacture an industrial device that runs embedded linux, and we are throwing ideas around on how we can find devices that are connected to our network, without knowing their ipAddress. I know this is possible, because Advantech do it with their ADAM utility to find units. I put a WireShark sniff on my LAN as the ADAM Utility found a unit, and saw the following[CODE]
View 2 Replies View RelatedHow can know the Broadcast address before subnetting? I know how to calculate the broadcast address , but don't understand 'Broadcast address before subnetting'?
View 2 Replies View RelatedI have recently configured secondary ip address on LAN Interface of Cisco C6509.. We have some application which needs to use broadcast traffic communication to communicate with client... Broadcast is working within subnet & also working from broadcast server to primary subnet. But not working from secondary subnet.. I have checked broadcast within secondary IP range & it's working fine... Secondary not working broadcast with primary and also with broadcast server... broadcast address is different for these subnet but both should be communicate since configured on same interface... When I went through Cisco website found that command "ip directed broadcast" which will pass broadcast to different subnet... But I'm not sure whether any other impact if I enable that command on particular Ethernet interface...
View 6 Replies View RelatedWhen disabling SSID broadcast and enabling MAC address filtering on WAG320N, my other wireless laptop get disconnected. And when you try to connect, it doesn't connect again.
View 3 Replies View RelatedI'm having problem with DFM under LMS 3.2. For some reason it periodically loses discovered devices and put all of them into "Learining" state. Sometimes restarting daemon manager useful but now it doesn't. I tried rediscovery few times but it doesn't work at all.
View 2 Replies View RelatedIs it possible to disable mac learning on a specific vlan in the nexus 5000?
View 4 Replies View RelatedWhy this same kind of bug/error/software fault exist in LMS 4.2 as it was in LMS 3.2 ? Why after a while after discovery of devices (state is "Known") DFM drops the state of devices to "Learning" and it stucks forever. Restarting of daemon manager works for a short time. It looks like the processing of faults stops a while after discovery is complete.
LMS 4.2 is running on Solaris 10, connected to other LMS in DCR Slave configuration.
Can you set the ASA 5500 series to learn the rule itself? I am talking about putting it into learning mode for first few weeks. I have done this with Zone Alarm software, but not sure this is available in Cisco 5500 series.
View 1 Replies View RelatedAges ago I was shadowing someone making a change on the network. I cannot remember which spanning tree version was running and cannot remember the config of any port either. What I do remember is that every switch port on the 2960 switch went orange and an outage occured, where the ports went into listening / learning mode. I assume that the STP was just the default ieee 802.1D.
View 3 Replies View RelatedI have a 6500 serious switch that one port (portfast enabled) hold a server .This server has sort of a Cluster configured for high availability .
During primary server failure the failover server acquires the cluster IP address (ie virtual IP).
Cluster IP 192.168.10.1
Primary server =192.168.10.2 Failover server =192.168.10.3
when failover happen , i am unable to learn arp. need to reboot the server for arp . After reboot i am getting different mac address(secondary) with cluster IP.
query:-normal clustering how mac address generating(means logicaly any mac address will be created or LAN card mac address)? Is ther any issue with portfast configuration(with out portfast configuration TCN will generate and max age timeout decrease 15 second from 300second) ?
Note : we checked a scenario same ip address with two system(ipconflit) and removed arp learned system from network and same thing happen we need to clear the arp manually in L3switch
I find E1200 cannot update its ARP information by received ARP Request which is sent by the wireless station connected to it, although E1200 has reply an correct ARP response to wireless station, and this will cause VoIP drop off when roaming from E1200 to another wireless AP which is bridge to it , so is there any way to enable the ARP request learning funtion of Linksys series?
View 5 Replies View RelatedWhy do we need them? Could we leave the LAN with a subnet broadcast packet (for instance with an address of 192.168.1.255 /24). Are those addresses used for something?
View 4 Replies View RelatedI have an AP, model AIR-LAP1041N-A-K9. How does the AP work? How does the AP broadcast?. Is It a circle and the AP is the center? Does the AP broadcast more front than back? Have any blind spot? I see the datasheet [URL] -
Integrated Antenna
#• 2.4 GHz, gain 4.0 dBi, horizontal beam width 360°
I know that 255.255.255.255 is the broadcast address to send message to all hosts that are in LAN. what i want here is, i want to send a mail to all hosts using this address.
View 9 Replies View RelatedIs it normal for a pc to send broadcast to ip address that don't really exist? I am using wireshark to sniff my company's network activity and im seeing something like this.who has 192.168.2.102 tell 192.168.2.235
who has 192.168.2.103 tell 192.168.2.235
who has 192.168.2.104 tell 192.168.2.235
who has 192.168.2.105 tell 192.168.2.235
who has 192.168.2.106 tell 192.168.2.235
but ip address 192.168.2.102 - 192.168.2.106 are currently not being in use..
I'm trying to get a wireless N-router and a N-adapter for a room outside the range of a G router. But their are two laptops at the house. They both use g adapters. Can the N router broadcast both N and G signal at the same time? So all adapters in the house can connect to the router. Does broadcasting both signals degree the range of the N broadcast making the an additional N adapter useless?
View 4 Replies View RelatedMy router has been having major problems lately [Well, for a while now]. Before, it would make all my machines [1 PC, 2 Laptops] disconnect from the internet briefly and reconnect. This doesn't impact browsing, video watching, etc. It wouldn't even say I was disconnected. However, I know it was disconnecting because programs like AIM, MSN, and multiple video games would say I lost connection. For example, MSN would disconnect and take me out of any conversations and reconnect a second later. Friends tell me that I keep going offline and then online.
I read somewhere I should change my channel, so I did and still got the same problem. Furthermore, my router/pc are literally right next to each other. Then I read elsewhere I should do a factory reset on my router by holding the reset button for a while. So I did and it reset. It started broadcasting as an unsecured network, so I was going to secure it.
1. Log in via http://192.168.0.1 (default "username: Admin and no pass")
2. Go to setup tab ----> internet ----> internet connection wizard2.1 CHANGE PASSWORD ! click next 2.2 chose time zone (you know where you are) 2.3 Configure your Internet Connection DHCP Connection (Dynamic IP Address)Choose this if your Internet connection automatically provides you with an IP Address. Most Cable Modems use this type of connection. 2.4. press "clone your computer's MAC address" ; hostname: 'your computer name in ubuntu' ( mine is "grobar" yours is ..... )
3. Go to setup tab ----> wireless settings ----> Wireless Network Setup Wizard (after this we're gonna do manual settings)
3.1 give your network a name= SSID (e.g. 'grobar')
3.2.Automatically assign a network key (Recommended) and chose WAP or WAP2
3.3 Write down the network key!!! Or do printscr and save this page.
4. Go to setup tab ----> wireless settings ---->Manual Wireless Network Setup 4.1 Wireless Network SettingsEnable Wireless : ALWAYS Wireless Network Name : (Also called the SSID) the name you gave in 3.1 802.11 Mode : chose "mixed 802.11n,g and b" Enable Auto Channel Scan : YES Wireless Channel : AUTO Transmission Rate : BEST (Mbit/s) Channel Width : AUTO 20/40 MHz Visibility Status : !!!Invisible!!! (so that no outsiders know your SSID except you) So after I finish the Internet Connection Wizard [Setting up Password etc], the http://192.168.0.1/ page asks me to click "Connect" so it can reboot the router with the settings. When I do so, the router turns off with the power icon being orange. After about 15 seconds or so, the broadcasting icon, power icon, and PC1 icon all turn green. However, there is a globe icon on it as well and that is ORANGE.
Regardless of power cycling, redoing the process, etc. it stays orange. None of my machines can connect to it. The only way I can connect again to the router is if I do a reset again (By holding the reset button). But then, I am unsecured and live in an apartment. I would like to add that the above process is the one I did previously and it worked fine. But then I had to reset the router and a similar problem occurred but I managed to fix it somehow and the first problem I talked about started happening (Reconnecting and disconnecting). Furthermore, when I go to "Connect to a Network" one of the old SSIDs I created for the router is still there regardless of the router status (Offline, Not connected, etc). I am typing this by connecting my PC directly to my modem. Router Information: D-Link DIR-615 300N
I am having issues recieving UDP response from my smart lighting control, i can here it in the same town but not from overseas..internal ip address 192.168.0.3 port 6000 it hears my commands from overseas i just cant here its response.
View 3 Replies View RelatedI am considering a toshiba tv with wifi. i want to limit the cables up the wall and would like to broadcast my cable to my tv by wifi
View 2 Replies View Relatedmy wireless router isn't broadcasting. It has the normal internet up but the wireless isn't allowing us to connect at all.
View 1 Replies View RelatedMy D-Link DIR-655 most of the time does not broadcast wireless signal. I use Windows 7 and XP with same result. I see at least a dozen of broadcasting wireless signal in my network. Even after it worked, then next time I power-on PC, the signal is not there. The Router does not show the status light for wireless usage for these non-broadcasting time. It works and does not work.
View 2 Replies View RelatedI have an DLINK-dir 815 router.. I have tried for 10 hours to get broadcast IP to work, no luck.. All html/javascript modifications.
The WOL works on LAN, but not over internet, so I figure it's the broadcast IP that needs to be virtual servered
I have my DIR-825 (type B, .202NA FW) all set up and wireless is working well, EXCEPT for the fact that inSSIDer consistently shows it broadcasting at only 54mbps, while it also shows several of my neighbors in the 150 and 300 ranges. I'm using a DWA 160 adapter in my notebook.
I have my 2.4 channel set for g&n, and my 5.0 channel at N only. both WPA2 and AES. WMM enabled. I've tried any number of combinations but nothing seems to work.
If I was content with 54mbps, I'd have stuck with my old G router.
To prevent virus to spread throughout the network ports or switches, can i used broadcast storm to control? sometime, network may encountered loop, or some virus spread?
interface gi0/1-24
storm-control broadcast level ?
storm-control multicast level ?
storm-control unicast level ?
storm-control action shutdown
What will be recommended level? or the threshold / pps ?I read through cisco website, and understand, however, just never apply before, what is the recommended level for ?in my network, we do have network ports connected to media server, just sharing video, song, etc for testing purpose, however not using PIM, but it work.
I have WLC 4404 Controller with 180 LWAPP. i want to disable Broadcast SSID from some specified APs not all. is it possible to do that with 4404 WLC controller.
View 9 Replies View RelatedSince a upgrade in IOS XE 3.0.9, our ASR 1002 have a problem with the DHCPDISCOVER.
View 1 Replies View RelatedSituation: On a Customer Site we have a Cisco ASA5510 in routed mode, and we have 2 networks which are both routed fine. The Customer has one device+ on lets say Network1 and a device2 on Network2.
Problem: Device1 now needs to communicate with Device2. To initiate the communication Device1 sends out a broadcast to find other devices. How can we tell the asa to just take that broadcast from that specific device1 and "route" it through Netzwork2. Is there any chance to get this working?
I have problems to connect a MAC-Server from the wireless-network (WLC-4402-50-K9, Version 5.1.163). The wired clients doesn't have problems to connect to the MAC-Server. The connection works over broadcasts. The wireless-network don't forward this broadcasts. The broadcast-forwarding feature is activated. It is no problem to the MAC-server from the wireless-clients. The hole network is in the same IP-network (one broadcast-domain).
View 1 Replies View Relatedhow a device (PC or router, in this example) knows to slow down broadcast of traffic.Say my cable modem from my ISP is coded to only allow 50mbps.My internal network supports the normal 100mbps.How does my router know to not send my cable modem more than 50mbps of data (because anything above, I assume after the cable modems RAM fills, will be dropped).I know TCP/IP has "Autonegotiation" which determines link type, but it's only based around if t's 1000/100/10 ethernet. No custom speed variable, such as 50mbps in this case.Say I put my network uploading data maximum stress to my internet connection, at 100mbps. Will my cable modem ever send some special packet telling me router that's too much or something?I suppose if I knew this, I could also understand how when I upload a file to another computer on my network, it does it at the full 100mbps, but over the internet, limited to my upload speed; but how does my computer or router know to slow down because my ISP doesn't allow 100mbps up? It has to be able to detect link speed somehow, otherwise just constantly sending 100mbps up will result in tons of lost data at my router/cable modem, and give the computer a frequently false sense of upload speed.
View 1 Replies View RelatedThey currently have three Ambicon WL300N-ARs in their network. They are set up as AP and everything has been running fine till we tried to put a security DVR/camera behind each router. The first one worked without any issues but once we connected the second DVR to the network became unusable, very slow. Someone told the IT guy that it was probably a broadcast storm. I don't know anything about the ambicon routers, but if the wireless is setup as a AP would it forward broadcast? I was under the impression that routers did not forward broadcast. or by setting it up as a AP it no longer performs as a router? The three Ambicons are connected to a unmanaged fiber switch, I asked for a make and model but he didn't know. Also connected to the fiber switch is another unmanaged netgear switch.
View 1 Replies View RelatedWe have a Cisco 4400 WLC running version 7.0.220.0 and are experiencing clients randomly dropping both broadcast and multicast at the same time. This is not specific to one area of the site and the duration of the MC/Brodacast loss varies. These comms outages don’t happen on all the clients at once but usually affect one client at a time. After a few minutes or a few hours, the client will start receiving the multicast without user intervention.
The site has Cisco 1522 AP's that have rather interesting logs where the DTLS sends fatal errors, followed by CAPWAP going into discovery state. Not sure if this has the same affect or if that's a completely seperate issue.I was told it could be the GTK but I don't believe 7.0.220 has this feature even enabled. The clients are Cisco 3230 and Cisco 1310's. The clients are running version 12.4(25d)JA1 while the 3230 router is running version 12.4(24)T7. What supporting logs or configs need to be shared to better troubleshoot. This has been going on for quite some time and is frustrating the end user as multicast is essential to the operation.