Just an update, I installed 10db attenuator and errors have gone away. Thank you all for the suggestion!
On Wed, Oct 1, 2008 at 7:54 PM, Robert Boyle <[EMAIL PROTECTED]> wrote: > At 11:56 AM 10/1/2008, Jay Nakamura wrote: > >> It looks like Opti-3 have "Long" and "Short" option for LBO on the DS3 >> interface. I am going to make sure Verizon set it to short since the coax >> is only about 15' long. >> > > Even with short LBO, we still need the attenuators sometimes. Look for LCV > errors. > > I don't have any attenuators handy to try that out. I did however, >> changed >> the DSU mode to Kentrox and errors have gone away for the last hour. I >> didn't think that really mattered if you were doing full DS3. >> > > It does matter. Verizon does have a lot of ADC/Kentrox DSUs connecting via > HSSI to their old frame relay switches in their COs. Be careful of a nasty > bug we found which will hang the router on boot if all of the following are > true: > > 1. You have a PA-T3 or PA-2T3 > 2. You have dsu mode 2? (Kentrox mode whatever that is - I don't have time > to look at the config at the moment) > 3. A T3 is connected (unplug the T3 RECV and it will boot fine) > 4. You reboot (soft or hard) > > The router will hang right after it lists the RAM during the POST. The > problem is with the microcode initialization for the DS3 chip when using > Kentrox mode and only if there is carrier detected. They finally fixed this, > but it is late in the 12.3 train and I don't think they backported it to > 12.2. This is a nasty surprise when you reboot the router at a remote POP at > 3AM. Just test for this and if you have the bug, let me know and I'll track > down the bug ID in my archives. This problem was reproducible on any 72XX > router with any PA-T3 or PA-2T3(+) card. > > -Robert > > > > > Tellurian Networks - Global Hosting Solutions Since 1995 > http://www.tellurian.com | 888-TELLURIAN | 973-300-9211 > "Well done is better than well said." - Benjamin Franklin > > _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/