> > 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 > > > > Thanks in advance, > ------------------------------------------------------------------------ > Steve Edwards [EMAIL PROTECTED] Voice: +1-760-468-3867 PST > Newline [EMAIL PROTECTED] Fax: +1-760-731-3000 > _______________________________________________ > --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 > ---------------End of Original Message----------------- _______________________________________________ --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
