> If nic is loaded using modprobe - you can set options for duplex - > depending on the nic... > See /etc/modules.conf
I assume you really meant /etc/modprobe.conf ;) > > -----Original Message----- > > > > > > For an asterisk server _always_ statically define the > > duplex setting > > > > on both the switch and the nic card. On sip phones and > > workstations, > > > > > > Can you give an example of how to check the duplex setting and > > > statically define it for, say, RedHat9 > > > > Multiple ways... try 'dmesg | grep duplex' or use 'mii-tool'. > > > > Be careful with assumptions relative to what happens after a > > reboot on any system. Static use of the mii-tool within your > > system startup scripts may be necessary to ensure full duplex > > operation. > > > > > > > On Mon, 29 Aug 2005, Rich Adamson wrote: > > > > > > > > > > >> Everything is set to autoneg, NICs, switches and router > > > >> > > > > > > > > To ensure reasonable performance, key devices (eg, > > routers, servers) > > > > should _always_ have duplex settings statically defined. Speed is > > > > less of an issue as the 10/100 negotiation is hard to get wrong. > > > > > > > > Part of the duplex negotiation problem is that consistent > > standards > > > > have not been implemented by all manufacturers (and nic > > card drivers). > > > > The two ends of a cat5 cable will often times try to auto > > negotiate > > > > the duplex settings at roughly the same time, and 50% of > > the time it > > > > will be wrong (eg, mismatched). As someone mentioned previously, > > > > mismiatched duplex settings will seriously impact performance and > > > > throughput. > > > > > > > > Keep in mind that opening the cat5 cable at either end > > (eg, unplug > > > > and replug the rj45) will cause a re-nogitation, as will > > a reboot, > > > > etc. > > > > > > > > There are a lot of systems and drivers that don't include > > the code > > > > to tell you what the actual duplex setting is after a > > re-negotiation. > > > > MS-based products are poor, and finding the actual > > setting in many > > > > of the linux distro's is not necessarily easy. > > > > > > > > For an asterisk server _always_ statically define the > > duplex setting > > > > on both the switch and the nic card. On sip phones and > > workstations, > > > > the duplex setting is less important, but should still > > match at both > > > > ends of the cable. > > > > > > > > (FWIW, my company does professional network performance > > assessments > > > > and you couldn't even guess how many large & small > > corporate admins > > > > don't have a clue. That's based on 12 years of experience > > at sites > > > > in over 40 US states.) _______________________________________________ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
