OK, I've reconfigured the port as follows to mark all ingress traffic with a dscp value of 46 (ef):
interface GigabitEthernet1/0/7 stp edged-port enable broadcast-suppression pps 3000 port access vlan 162 undo jumboframe enable description sipXecs traffic-priority inbound ip-group 2000 rule 0 dscp ef priority-trust cos Thank you very much for your help. Hopefully this improves things. On 6/22/2011 11:59 AM, Michael Picher wrote: > Yea, you don't want to 'trust' dscp because sipXecs doesn't set it... > you want to force dscp 46 on that port for all traffic... > > Thanks, > Mike > > On Wed, Jun 22, 2011 at 11:14 AM, Alex Brown <alex...@bellsouth.net > <mailto:alex...@bellsouth.net>> wrote: > > On 6/22/2011 9:45 AM, Michael Picher wrote: > > Which port is your sipXecs system plugged into? I don't see a > port with > > DSCP 46 forced. > > > > My sipXecs system is plugged into port 7 on a 3Com 4200G. Here's the > configuration for that port: > > interface GigabitEthernet1/0/7 > stp edged-port enable > broadcast-suppression pps 3000 > port access vlan 162 > undo jumboframe enable > priority-trust cos > > I have just changed the configuration to the following, changing the > priority-trust from cos to dscp: > > interface GigabitEthernet1/0/7 > stp edged-port enable > broadcast-suppression pps 3000 > port access vlan 162 > undo jumboframe enable > priority-trust dscp > > The 3Com switches allow for the automatic setting of the COS to 6 and > the DSCP to 46 when ports are configured to be a part of the "voice > vlan." "Voice VLAN" is a feature of the 3Com 4200 switches. Our voice > vlan is 162 and because the port (interface GigabitEthernet1/0/7) is > already in VLAN 162, I believe its DSCP value is already set to 46 > because when, as a test, I tried to add the "voice vlan enable" command > to that port, it told me the following: > > [4200G]interface GigabitEthernet1/0/7 > [4200G-GigabitEthernet1/0/7]voice vlan enable > Can't enable voice vlan because the port is in voice vlan and auto > mode has been set! > [4200G-GigabitEthernet1/0/7] > > When I look at the status for the voice VLAN, I see the following: > > [4200G]display voice vlan status > Voice Vlan status: ENABLE > Voice Vlan ID: 162 > Voice Vlan security mode: Security > Voice Vlan aging time: 1440 minutes > Current voice vlan enabled port mode: > PORT MODE COS DSCP > --------------------------------------------- > GigabitEthernet1/0/4 AUTO 6 46 > GigabitEthernet1/0/5 AUTO 6 46 > GigabitEthernet1/0/6 AUTO 6 46 > GigabitEthernet1/0/8 AUTO 6 46 > GigabitEthernet1/0/9 AUTO 6 46 > GigabitEthernet1/0/10 AUTO 6 46 > GigabitEthernet1/0/11 AUTO 6 46 > GigabitEthernet1/0/12 AUTO 6 46 > GigabitEthernet1/0/13 AUTO 6 46 > GigabitEthernet1/0/14 AUTO 6 46 > GigabitEthernet1/0/15 AUTO 6 46 > GigabitEthernet1/0/18 AUTO 6 46 > GigabitEthernet1/0/19 AUTO 6 46 > GigabitEthernet1/0/20 AUTO 6 46 > GigabitEthernet1/0/21 AUTO 6 46 > GigabitEthernet1/0/22 AUTO 6 46 > GigabitEthernet1/0/23 AUTO 6 46 > GigabitEthernet1/0/24 AUTO 6 46 > > [4200G] > > The voice VLAN is a dynamic VLAN that automatically detects the presence > of IP phones based on their MAC addresses. Since the sipXecs server is > not a Polycom phone, it does not appear in this dynamically updated > list. > > The following statement is from the 3Com Switch 4200G Family > Configuration Guide: > > In order to improve the transmission quality of voice traffic, the > switch by default re-marks the precedence of the traffic in the voice > VLAN as follows: > - Set the CoS (802.1p) precedence to 6. > - Set the DSCP precedence to 46. > > > _______________________________________________ > sipx-users mailing list > sipx-users@list.sipfoundry.org <mailto:sipx-users@list.sipfoundry.org> > List Archive: http://list.sipfoundry.org/archive/sipx-users/ > > > > > -- > Michael Picher > eZuce > Director of Technical Services > O.978-296-1005 X2015 > M.207-956-0262 > @mpicher <http://twitter.com/mpicher> > www.ezuce.com <http://www.ezuce.com> > _______________________________________________ sipx-users mailing list sipx-users@list.sipfoundry.org List Archive: http://list.sipfoundry.org/archive/sipx-users/
