[SOLVED] Re: [OT] Can't see computers on the other switch
Thanks to everyone for the help. It turns out the two Linksys switches are purring away happily and everything is hunky-dory; nothing wrong at all. Id10t error as you might expect... the server I couldn't see was on a 192.168.1.0 subnet when the rest of the house is on 192.168.0.0. Naturally it wouldn't answer to the addresses I was pinging... Yuck. -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
On Tue, Mar 12, 2002 at 07:25:33PM -0600, Rev. David P. Giffen wrote: One problem I had that I did realize at the time until I traced all my cables to see what the problem was. I realized that I had pluged one of my cables into the port that was shared with the uplink port and a cable in to the uplink port. Once I moved the cable that out of the shared port everything was upand running. I know the feeling. I now use scotch tape to cover up the shared port so I won't make the mistake again. Emmanuel ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
Just taking a shot here since I have something similiar at home (though using a Netgear hub and switch). Is there buttons you can press to enable connections to another hub/switch (so that you don't have to use a crossover cable)? Is there an uplink port on each switch? Use the uplink port on both, and push the uplink button on *one* of the switches. If there's no uplink toggle switch, then I believe you have to use a crossover cable to connect the two switches together. Paul Greene On Tue, 12 Mar 2002, Rodolfo J. Paiz wrote: Hi! OT but no idea where else to go... I have a home network using two simple desktop switches; one a 4-port Linksys with 2-port printserver builtin, and the other an 8-port Linksys. The 4-port's uplink connection is used to hook up to a normal port on the 8-port, and link lights show up properly when connected or disconnected. Machines on each switch can see each other perfectly, but cannot see machines on the other switch at all, returning Destination Host Unreachable errors. Any ideas on what might cause this? I've already tried three known-good cables, so I doubt that could be the problem... -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
At 3/12/2002 12:35 PM -0500, you wrote: Just taking a shot here since I have something similiar at home (though using a Netgear hub and switch). Thanks for the shot. There are no buttons on the switches, but there are uplink ports (shared with normal ports, don't plug cables into both!). Normal cables are for computer-to-switch communication; crossover cables are for switch-to-switch (assuming normal ports) or computer-to-computer. Uplink ports are a convenient way to crossover the connection so that you can use a normal cable to connect switch-to-switch. In order for this to work, you should of course only use 1 uplink port, and use a normal port on the other switch. I'm 100% certain I've done this correctly. What else could it be? -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
I haven't used the Linksys switches. On the Netgear, the uplink port is actually both a normal port *and* an uplink port depending on if the button is pressed in or not. On mine I used the uplink port on both, and had the button pressed on *one* of them. If yours is setup differently, and your ip addresses and netmask are set correctly (all on the same subnet?), then, well, a smarter man than me must take over from here. Paul On Tue, 12 Mar 2002, Rodolfo J. Paiz wrote: At 3/12/2002 12:35 PM -0500, you wrote: Just taking a shot here since I have something similiar at home (though using a Netgear hub and switch). Thanks for the shot. There are no buttons on the switches, but there are uplink ports (shared with normal ports, don't plug cables into both!). Normal cables are for computer-to-switch communication; crossover cables are for switch-to-switch (assuming normal ports) or computer-to-computer. Uplink ports are a convenient way to crossover the connection so that you can use a normal cable to connect switch-to-switch. In order for this to work, you should of course only use 1 uplink port, and use a normal port on the other switch. I'm 100% certain I've done this correctly. What else could it be? -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
At 3/12/2002 12:55 PM -0500, you wrote: If yours is setup differently, and your ip addresses and netmask are set correctly (all on the same subnet?) Yes, all checked. then, well, a smarter man than me must take over from here. Paul Help? Smarter men (or women, or any other human being)? Paul and I are lost. -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Rodolfo J. Paiz wrote: Help? Smarter men (or women, or any other human being)? Paul and I are lost. I wouldn't call me smarter, but I'm wise enough to not use Linksys switches. I've had several similar, equally unexplainable, problems with them. Sometimes just restarting the networking on the affected box(en) fixes it (renegotiation of link speed, perhaps). Those things are cheapcheapcheap, and they don't seem very reliable. Swap 'em for a Netgear and see if the problem persists. - -d - -- David Talkington PGP key: http://www.prairienet.org/~dtalk/0xCA4C11AD.pgp -BEGIN PGP SIGNATURE- Version: PGP 6.5.8 Comment: Made with pgp4pine 1.75-6 iQA/AwUBPI5NW79BpdPKTBGtEQJr9QCg4juqA/XkjI4PpAkMgV6Mw8EKUBwAnR8R ggP0wg1cKNCk/Lb5EdawGvKI =Hn/q -END PGP SIGNATURE- ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
On Tue, 12 Mar 2002, David Talkington wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Rodolfo J. Paiz wrote: Help? Smarter men (or women, or any other human being)? Paul and I are lost. I wouldn't call me smarter, but I'm wise enough to not use Linksys switches. I've had several similar, equally unexplainable, problems with them. Sometimes just restarting the networking on the affected box(en) fixes it (renegotiation of link speed, perhaps). Those things are cheapcheapcheap, and they don't seem very reliable. Swap 'em for a Netgear and see if the problem persists. Maybe Linksys took a cue from Cisco concerning auto-negotiation? Who knows? Based on that, you might try forcing the interface(s) to full duplex, 100mbit on the hosts. ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
At 3/12/2002 10:47 AM -0800, you wrote: I wouldn't call me smarter, but I'm wise enough to not use Linksys switches. [...] Swap 'em for a Netgear and see if the problem persists. Don't have $250 right now, and for the last two years I haven't had any problems with Linksys equipment. Plan to upgrade to better equipment anyway later, but for the moment must solve the problem rather than switching the equipment. Makes no sense to me that the switches work well on their own but won't talk to each other despite showing link lights, etc. -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
At 3/12/2002 12:00 PM -0800, you wrote: Maybe Linksys took a cue from Cisco concerning auto-negotiation? Who knows? Based on that, you might try forcing the interface(s) to full duplex, 100mbit on the hosts. I have three hosts on one switch, and they are all talking to each other flawlessly at full-duplex 100Mbps. Two hosts are on the other switch, also talking to each other at full-duplex 100Mbps. What gets me is that hosts on switch 1 can't see hosts on switch 2. Arrrgh. -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
RE: [OT] Can't see computers on the other switch
use a crossover cable and see if that works -Original Message- From: Rodolfo J. Paiz [mailto:[EMAIL PROTECTED]] Sent: Tuesday, March 12, 2002 12:18 PM To: [EMAIL PROTECTED] Subject: [OT] Can't see computers on the other switch Hi! OT but no idea where else to go... I have a home network using two simple desktop switches; one a 4-port Linksys with 2-port printserver builtin, and the other an 8-port Linksys. The 4-port's uplink connection is used to hook up to a normal port on the 8-port, and link lights show up properly when connected or disconnected. Machines on each switch can see each other perfectly, but cannot see machines on the other switch at all, returning Destination Host Unreachable errors. Any ideas on what might cause this? I've already tried three known-good cables, so I doubt that could be the problem... -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
Sounds to me more like an arp table problem. Those switches aren't manageable, right? Francisco [EMAIL PROTECTED] 12/03/02 14:05 At 3/12/2002 12:00 PM -0800, you wrote: Maybe Linksys took a cue from Cisco concerning auto-negotiation? Who knows? Based on that, you might try forcing the interface(s) to full duplex, 100mbit on the hosts. I have three hosts on one switch, and they are all talking to each other flawlessly at full-duplex 100Mbps. Two hosts are on the other switch, also talking to each other at full-duplex 100Mbps. What gets me is that hosts on switch 1 can't see hosts on switch 2. Arrrgh. -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
At 3/12/2002 02:57 PM -0500, you wrote: Sounds to me more like an arp table problem. Those switches aren't manageable, right? Nope. One $75 8-port switch, and one $120 4-port switch plus printserver. -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
Just in case... don't you have an aditional hub (4 port will be enough) I'm trying to setup a test pod: place the hub with 2 crossover cables and connect the switches to them. Then with a PC connected to the hub, sniff the traffic between switches. Could be interesting to watch... Another idea that comes is replacing one switch at a time with the hub. You have time to experiment, don't you? ;-) Francisco [EMAIL PROTECTED] 12/03/02 16:13 At 3/12/2002 02:57 PM -0500, you wrote: Sounds to me more like an arp table problem. Those switches aren't manageable, right? Nope. One $75 8-port switch, and one $120 4-port switch plus printserver. -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
Re: [OT] Can't see computers on the other switch
On Tue, 12 Mar 2002, Rodolfo J. Paiz wrote: At 3/12/2002 12:00 PM -0800, you wrote: Maybe Linksys took a cue from Cisco concerning auto-negotiation? Who knows? Based on that, you might try forcing the interface(s) to full duplex, 100mbit on the hosts. I have three hosts on one switch, and they are all talking to each other flawlessly at full-duplex 100Mbps. Two hosts are on the other switch, also talking to each other at full-duplex 100Mbps. What gets me is that hosts on switch 1 can't see hosts on switch 2. Arrrgh. Yeah , I know the feeling. I had a Sun E4500, a JNI fibre channel card and an EMC Symmetrix kick my ass today. Man did that suck. ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
RE: [OT] Can't see computers on the other switch
One problem I had that I did realize at the time until I traced all my cables to see what the problem was. I realized that I had pluged one of my cables into the port that was shared with the uplink port and a cable in to the uplink port. Once I moved the cable that out of the shared port everything was upand running. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Rodolfo J. Paiz Sent: Tuesday, March 12, 2002 11:18 AM To: [EMAIL PROTECTED] Subject: [OT] Can't see computers on the other switch Hi! OT but no idea where else to go... I have a home network using two simple desktop switches; one a 4-port Linksys with 2-port printserver builtin, and the other an 8-port Linksys. The 4-port's uplink connection is used to hook up to a normal port on the 8-port, and link lights show up properly when connected or disconnected. Machines on each switch can see each other perfectly, but cannot see machines on the other switch at all, returning Destination Host Unreachable errors. Any ideas on what might cause this? I've already tried three known-good cables, so I doubt that could be the problem... -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
RE: [OT] Can't see computers on the other switch
Maybe something is wrong with the spanning tree algorithm in one of the switches and they are not passes on routing info ?? Have you put the switch to switch connection into one of the Working PC ports to see if that helps? When you try to talk to one of the remote hosts, does the link/data light flash on the port which links to the switches together? And one step further, does the link/data lights on the remote switches PC ports flash ?? IE: Is the request getting out ? Darryl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Rodolfo J. Paiz Sent: Wednesday, March 13, 2002 6:05 AM To: [EMAIL PROTECTED] Subject: Re: [OT] Can't see computers on the other switch At 3/12/2002 12:00 PM -0800, you wrote: Maybe Linksys took a cue from Cisco concerning auto-negotiation? Who knows? Based on that, you might try forcing the interface(s) to full duplex, 100mbit on the hosts. I have three hosts on one switch, and they are all talking to each other flawlessly at full-duplex 100Mbps. Two hosts are on the other switch, also talking to each other at full-duplex 100Mbps. What gets me is that hosts on switch 1 can't see hosts on switch 2. Arrrgh. -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
RE: [OT] Can't see computers on the other switch
Have you ruled out a cabling problem? Are you using the right kind of cable (crossover in some cases)? Is the cable short enough? On Wed, 13 Mar 2002, Darryl Harvey wrote: Maybe something is wrong with the spanning tree algorithm in one of the switches and they are not passes on routing info ?? Have you put the switch to switch connection into one of the Working PC ports to see if that helps? When you try to talk to one of the remote hosts, does the link/data light flash on the port which links to the switches together? And one step further, does the link/data lights on the remote switches PC ports flash ?? IE: Is the request getting out ? Darryl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Rodolfo J. Paiz Sent: Wednesday, March 13, 2002 6:05 AM To: [EMAIL PROTECTED] Subject: Re: [OT] Can't see computers on the other switch At 3/12/2002 12:00 PM -0800, you wrote: Maybe Linksys took a cue from Cisco concerning auto-negotiation? Who knows? Based on that, you might try forcing the interface(s) to full duplex, 100mbit on the hosts. I have three hosts on one switch, and they are all talking to each other flawlessly at full-duplex 100Mbps. Two hosts are on the other switch, also talking to each other at full-duplex 100Mbps. What gets me is that hosts on switch 1 can't see hosts on switch 2. Arrrgh. -- Rodolfo J. Paiz [EMAIL PROTECTED] ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list -- -Statux ___ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
