Re: Cable Colors - A Standard
This one is plenty safe to stick on a live cable, plus it works a whole lot better than the old analog ones: http://www.flukenetworks.com/fnet/en-us/products/IntelliTone+Toner+and+Probe/Overview.htm?categorycode=CPTT -- Tim On Thu, Jun 19, 2008 at 7:50 PM, Nathan Ward <[EMAIL PROTECTED]> wrote: > On 20/06/2008, at 4:19 AM, Glen Turner wrote: > >> A useful tool is a audio cable tracer. When disconnecting >> a PC you attach the signal injector. You then use the other >> half of the tool to identify the cable (it buzzes when near). >> This allows the patch cables to be pulled with certainty >> rather than left in the rack just in case it attached to some >> other host and you fear causing an unplanned outage. >> > > > You whack on one of these things when there's still active gear on the end? > > -- > Nathan Ward > > > > > >
Re: Cable Colors - A Standard
On 20/06/2008, at 4:19 AM, Glen Turner wrote: A useful tool is a audio cable tracer. When disconnecting a PC you attach the signal injector. You then use the other half of the tool to identify the cable (it buzzes when near). This allows the patch cables to be pulled with certainty rather than left in the rack just in case it attached to some other host and you fear causing an unplanned outage. You whack on one of these things when there's still active gear on the end? -- Nathan Ward
Re: Level 3 / Time Warner problem in Ohio
My sources report that both OC-192 circuits in Time Warner's backbone have recovered. I see no packet loss or latency across their network now. ~Chris On Thu, Jun 19, 2008 at 10:18 AM, Tim Sanderson <[EMAIL PROTECTED]> wrote: > Same. Also shut down peering with TWC. > > We have confirmation from some local technicians that an OC-192 is down > between Columbus, OH and Ashburton, VA... and an OC-192 down between > Indianapolis and Chicago. Another tech that I spoke to said it was a > problem between Ohio and NYC. That is causing major problems all over Ohio. > > www.donet.com (Dayton Ohio ISP) > > -- > Tim Sanderson, network administrator > [EMAIL PROTECTED] > > > -Original Message- > From: Steve Searles [mailto:[EMAIL PROTECTED] > Sent: Thursday, June 19, 2008 12:15 PM > To: 'Mike Walter'; Peter Pauly; Nanog Mailing list > Subject: RE: Level 3 / Time Warner problem in Columbus OH? > > Same here, we have also shut down our TWT peer. > > > Steve Searles > Sr. Network Engineer > Zimmerman Communications Inc. > http://www.zimcom.net > Phone. 513-624-3900 > Fax. 513-624-3909 > Toll Free. 888-624-3910 > > -Original Message- > From: Mike Walter [mailto:[EMAIL PROTECTED] > Sent: Thursday, June 19, 2008 11:48 AM > To: Peter Pauly; Nanog Mailing list > Subject: RE: Level 3 / Time Warner problem in Columbus OH? > > Just spoke with TW Telecom on my ticket. They have (2) OC-192s down in > the Ohio area. They have open troubles with their vendor. Seems odd > that both are down according to the rep I spoke with. We have shut down > our TW Telecom BGP session until resolved due to high latency. > > Mike Walter, MCP > Systems Administrator > 3z.net > > > -Original Message- > From: Peter Pauly [mailto:[EMAIL PROTECTED] > Sent: Thursday, June 19, 2008 11:43 AM > To: Nanog Mailing list > Subject: Level 3 / Time Warner problem in Columbus OH? > > Time Warner is reporting to me that their provider, Level 3 is having > problems in Columbus OH that is affecting several large midwest > cities. Anyone have more details? > > > > > -- Chris Grundemann
Re: Cable Colors - A Standard
George Imburgia wrote: There's a standard; ANSI/TIA/EIA 606A http://www.flexcomm.com/library/606aguide.pdf Here in Australia there's no standard for colours of data communications patch cables. But there are some non-data communications standards for fixed cable colours. In particular, fire system sensors must use red; the use of cream is reserved for telephony; and fixed electrical cables must be white. To minimise error I avoid those colours for patch cables (ie, non-fixed cables). This is prudent anyway, as under the Wiring Rules simply tying down a patch lead with a cable tie is enough to turn it into a fixed cable. I've found that it's more important to have a ready supply of cable lengths (say 0.5m increments) and labels than to have colours. That avoids a mess developing in the first place that might need colour coding to sort out. We use blue, simply because it's the most readily available colour. The only cable which really needs a special colour is one which doesn't connect all eight pins in sequence. To avoid stocking many lengths of cross-over cables, we use a 0.6m crossover cable and a Cat6 joiner. We colour these pink -- it's noticeable and Real Men sysadmins don't steal them. A useful tool is a audio cable tracer. When disconnecting a PC you attach the signal injector. You then use the other half of the tool to identify the cable (it buzzes when near). This allows the patch cables to be pulled with certainty rather than left in the rack just in case it attached to some other host and you fear causing an unplanned outage. Also I've found that many cabling messes occur because the installer had no alternative. There was simply no cableway that wasn't congested. For high-density routers I've found that about 1/3rd of the rack is given over to cable patch panels and ring runs. About two racks in ten (ie, one optical, one UTP) need to be given over to just inter-rack patching and I'd encourage a specialist-built patch rack for that purpose. A rack full of PCs requires about 0.8m of available tray down the side of the rack to tie down the patch leads and other cables. Again, that huge amount of tray isn't usually provided, can't be added afterwards, and the installer has no choice but to do poor work if there's nothing to tie cables to. We ban non-fixed cabling between our racks, which means that patch cables only run within a rack. This simplifies things considerably. Fortunately, we've got the fiber density to racks to justify that design. I've noticed a considerable fall in the price of pre-assembled optical patch panels, so it's well worth looking at the prices even at low densities of cables to see if they fallen enough to make a fixed cabling system worthwhile. It's not like alternative -- those gutters used to pull optical patch leads between racks -- are cheap so I've expect the prices to cross at some stage in the next few years. Cheers, glen
RE: Level 3 / Time Warner problem in Ohio
Same. Also shut down peering with TWC. We have confirmation from some local technicians that an OC-192 is down between Columbus, OH and Ashburton, VA... and an OC-192 down between Indianapolis and Chicago. Another tech that I spoke to said it was a problem between Ohio and NYC. That is causing major problems all over Ohio. www.donet.com (Dayton Ohio ISP) -- Tim Sanderson, network administrator [EMAIL PROTECTED] -Original Message- From: Steve Searles [mailto:[EMAIL PROTECTED] Sent: Thursday, June 19, 2008 12:15 PM To: 'Mike Walter'; Peter Pauly; Nanog Mailing list Subject: RE: Level 3 / Time Warner problem in Columbus OH? Same here, we have also shut down our TWT peer. Steve Searles Sr. Network Engineer Zimmerman Communications Inc. http://www.zimcom.net Phone. 513-624-3900 Fax. 513-624-3909 Toll Free. 888-624-3910 -Original Message- From: Mike Walter [mailto:[EMAIL PROTECTED] Sent: Thursday, June 19, 2008 11:48 AM To: Peter Pauly; Nanog Mailing list Subject: RE: Level 3 / Time Warner problem in Columbus OH? Just spoke with TW Telecom on my ticket. They have (2) OC-192s down in the Ohio area. They have open troubles with their vendor. Seems odd that both are down according to the rep I spoke with. We have shut down our TW Telecom BGP session until resolved due to high latency. Mike Walter, MCP Systems Administrator 3z.net -Original Message- From: Peter Pauly [mailto:[EMAIL PROTECTED] Sent: Thursday, June 19, 2008 11:43 AM To: Nanog Mailing list Subject: Level 3 / Time Warner problem in Columbus OH? Time Warner is reporting to me that their provider, Level 3 is having problems in Columbus OH that is affecting several large midwest cities. Anyone have more details?
RE: Level 3 / Time Warner problem in Columbus OH?
Same here, we have also shut down our TWT peer. Steve Searles Sr. Network Engineer Zimmerman Communications Inc. http://www.zimcom.net Phone. 513-624-3900 Fax. 513-624-3909 Toll Free. 888-624-3910 -Original Message- From: Mike Walter [mailto:[EMAIL PROTECTED] Sent: Thursday, June 19, 2008 11:48 AM To: Peter Pauly; Nanog Mailing list Subject: RE: Level 3 / Time Warner problem in Columbus OH? Just spoke with TW Telecom on my ticket. They have (2) OC-192s down in the Ohio area. They have open troubles with their vendor. Seems odd that both are down according to the rep I spoke with. We have shut down our TW Telecom BGP session until resolved due to high latency. Mike Walter, MCP Systems Administrator 3z.net -Original Message- From: Peter Pauly [mailto:[EMAIL PROTECTED] Sent: Thursday, June 19, 2008 11:43 AM To: Nanog Mailing list Subject: Level 3 / Time Warner problem in Columbus OH? Time Warner is reporting to me that their provider, Level 3 is having problems in Columbus OH that is affecting several large midwest cities. Anyone have more details?
Re: Level 3 / Time Warner problem in Columbus OH?
Master ticket number is ST78001, effecting OH, IN, KY. They report that they have a couple of OC-192s down. On Thu, 2008-06-19 at 11:43 -0400, Peter Pauly wrote: > Time Warner is reporting to me that their provider, Level 3 is having > problems in Columbus OH that is affecting several large midwest > cities. Anyone have more details? >
RE: Level 3 / Time Warner problem in Columbus OH?
Just spoke with TW Telecom on my ticket. They have (2) OC-192s down in the Ohio area. They have open troubles with their vendor. Seems odd that both are down according to the rep I spoke with. We have shut down our TW Telecom BGP session until resolved due to high latency. Mike Walter, MCP Systems Administrator 3z.net -Original Message- From: Peter Pauly [mailto:[EMAIL PROTECTED] Sent: Thursday, June 19, 2008 11:43 AM To: Nanog Mailing list Subject: Level 3 / Time Warner problem in Columbus OH? Time Warner is reporting to me that their provider, Level 3 is having problems in Columbus OH that is affecting several large midwest cities. Anyone have more details?
Level 3 / Time Warner problem in Columbus OH?
Time Warner is reporting to me that their provider, Level 3 is having problems in Columbus OH that is affecting several large midwest cities. Anyone have more details?
Wifi access problem: control session time and accounting accuracy
hi, we provide Wifi access to customers. The basic system architecture is, customer get IP address using DHCP, but BAS limit customer access to special IP address block before customer log in. Customer log in at portal page, where policy server get username/passwed and authenticate by sending radius packets to AAA server. We use Redback NPM with SE800 and Juniper C2k with E1440. We met two problem : 1. Could we control customer session time according to radius authentication echo message ( Session-timeout )? it seems redback could not translate Session-timeout to its internal control policy. 2. How could we track customer status ? we noticed some people leave hotspot without log out explicitly disconnect. There leave a lot of open session record on radius server, because no Accouting-Off packet received. Is there any mechanism we could use to detect cliet status in Wifi environment ? ( e.g. PPPOE keepalive message ) thanks in advance . Joe Try cool new emoticons, skins, plus more space for friends. Download Yahoo! Messenger Singapore now! http://sg.messenger.yahoo.com
