I am crossposting a message I sent to NANOG. We have had similar issues on a crippling scale over the last few days, but it appears we have finally resolved them. -----Forwarded Message----- From: Ejay Hire Sent: Wednesday, August 27, 2003 11:47 AM To: 'Andy Walden'; Geo. Cc: NANOG Subject: RE: Max TNT ping thing Here is a summary of our experiences with the bug. Last Thursday, A TNTs with years of uptime rebooted. No cause was apparent, and nothing relevant happened in the logs. On Friday, It happened to a different TNT. This occurred with increasing frequency over the weekend, and we didn't get a lot of sleep. We tried using a filter in the tnt to block port 135 and 4444 to no avail, and then tried a filter to block ICMP in the tnt also to no avail. Next, we removed the tnt filters and tried rate-limiting ICMP to the TNT's. That didn't work. Next we removed the rate-limit and applied the Cisco-supplied anti-nachi route-map to the upstream interfaces facing the Tnt's. This significantly reduced the problem, but we were still rebooting every 12 hours or so. Disabling route-caching on the TNT stopped the rebooting problem, but we were seeing 40% packet loss on one of the TNTs. (Note, both TNT's have a Ds-3 of PRI's, and use the TNT-SL-E10-100 four port Ethernet cards) The packet loss was only affecting one TNT, and we discovered that it was running 9.0.6 while the unaffected box was running 9.0.9. Upgrading the box to 9.0.9 fixed the packet loss issue. We are currently up and haven't had any blips in 24 hours. (knock on wood.) -Ejay -----Original Message----- From: Chad Whitten [mailto:chadwick at nexband.com] Sent: Tuesday, August 26, 2003 10:33 PM To: Yogendra Joshi Cc: ascend-users at max.bungi.com; Subject: Re: (ASCEND) Serious problem with TNT I am having a similar problem. At first, I had 1 tnt rebooting itself every few hours (always it seemed at peak traffic times) and the only errors I would get would be related to the ethernet card. Now I have another TNT doing the same thing. Both are running 7.2.3 TAOS, both have the 4 port ethernet cards. They are on different networks connecting to different radius servers. The TNT that has just started acting up has much lower usage (about 70 users at peak time) than the other TNT (400+ at peak time). The problem first appeared last week and has now spread to another machine. I have one more TNT that isnt doing this and a bunch of max2024's and max4048's that are fine. Very frustrating. Anyone else care to chime in? Chad Whitten Network/Systems Administrator neXband Communications cwhitten at nexband.com 601-944-4801 On Tue, 26 Aug 2003, Yogendra Joshi wrote: ++ Ascend Users Mailing List ++ To unsubscribe: send unsubscribe to ascend-users-request at bungi.com Archives: http://www.nexial.com/mailinglists/