Re: [asterisk-users] switch QOS requirements
Al lists [EMAIL PROTECTED] writes: Its much more reliable than translating DSCP to COS by switch which i'm not sure which switch does that and which one doesn't COS only works if you use a tagged interface on your Asterisk machine. Untagged packets have nowhere to put the COS tag. It also doesn't survive routing (obviously, since it's layer 2). /Benny ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] switch QOS requirements
Very Nice! Its much more reliable than translating DSCP to COS by switch which i'm not sure which switch does that and which one doesn't, and how they do it considering some gray area when you translate from DSCP to COS. On Feb 4, 2008 5:26 PM, Jared Smith [EMAIL PROTECTED] wrote: On Sun, 2008-02-03 at 22:42 -0700, Al lists wrote: Theoretically, setting TOS value ( these days called DSCP) wont change anything in switch behavior, unless you are using Layer 3 switches. What makes a difference in a switch is COS bits, and i'm not sure how asterisk sets that. In Asterisk 1.6, you will be able to set both the COS and TOS values. The sample sip.conf in the Asterisk 1.6 betas contains the following, to show you just how much you can adjust things :-) ;tos_sip=cs3; Sets TOS for SIP packets. ;tos_audio=ef ; Sets TOS for RTP audio packets. ;tos_video=af41 ; Sets TOS for RTP video packets. ;tos_text=af41 ; Sets TOS for RTP text packets. ;cos_sip=3 ; Sets 802.1p priority for SIP packets. ;cos_audio=5; Sets 802.1p priority for RTP audio packets. ;cos_video=4; Sets 802.1p priority for RTP video packets. ;cos_text=3 ; Sets 802.1p priority for RTP text packets. -- Jared Smith Community Relations Manager Digium, Inc. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] switch QOS requirements
On Sun, 2008-02-03 at 22:42 -0700, Al lists wrote: Theoretically, setting TOS value ( these days called DSCP) wont change anything in switch behavior, unless you are using Layer 3 switches. What makes a difference in a switch is COS bits, and i'm not sure how asterisk sets that. In Asterisk 1.6, you will be able to set both the COS and TOS values. The sample sip.conf in the Asterisk 1.6 betas contains the following, to show you just how much you can adjust things :-) ;tos_sip=cs3; Sets TOS for SIP packets. ;tos_audio=ef ; Sets TOS for RTP audio packets. ;tos_video=af41 ; Sets TOS for RTP video packets. ;tos_text=af41 ; Sets TOS for RTP text packets. ;cos_sip=3 ; Sets 802.1p priority for SIP packets. ;cos_audio=5; Sets 802.1p priority for RTP audio packets. ;cos_video=4; Sets 802.1p priority for RTP video packets. ;cos_text=3 ; Sets 802.1p priority for RTP text packets. -- Jared Smith Community Relations Manager Digium, Inc. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[asterisk-users] switch QOS requirements
Dear List, We are tearing out legacy PBX and replacing with Asterisk PBX and new LAN for our 90+ person operation. Question: what QOS capabilities (protocols, etc) does Asterisk support/require in a LAN switch to deliver business grade phone service? Thanks ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] switch QOS requirements
John Williams [EMAIL PROTECTED] writes: We are tearing out legacy PBX and replacing with Asterisk PBX and new LAN for our 90+ person operation. Question: what QOS capabilities (protocols, etc) does Asterisk support/require in a LAN switch to deliver business grade phone service? Thanks If you have one switch for the whole network, you're generally fine without QoS. Switches these days can handle full bandwidth on all ports at the same time. Anyway, Asterisk is no different from other PBX's when it comes to QoS. Should it turn out that you actually need it on the LAN, just be sure you set the tos parameters in sip.conf to something that is prioritized by the switch. /Benny ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] switch QOS requirements
On Sun, 03 Feb 2008 22:11:04 +0100, Benny Amorsen wrote: John Williams [EMAIL PROTECTED] writes: We are tearing out legacy PBX and replacing with Asterisk PBX and new LAN for our 90+ person operation. Question: what QOS capabilities (protocols, etc) does Asterisk support/require in a LAN switch to deliver business grade phone service? Thanks If you have one switch for the whole network, you're generally fine without QoS. Switches these days can handle full bandwidth on all ports at the same time. Anyway, Asterisk is no different from other PBX's when it comes to QoS. Should it turn out that you actually need it on the LAN, just be sure you set the tos parameters in sip.conf to something that is prioritized by the switch. It tends to be more of an issue when you're sending calls over a link with limited bandwidth. Usually more of a concern in the router. Michael -- Michael Graves mgravesatmstvp.com blog.mgraves.org o713-861-4005 c713-201-1262 sip:[EMAIL PROTECTED] skype mjgraves fwd 54245 ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] switch QOS requirements
Al lists wrote: Theoretically, setting TOS value ( these days called DSCP) wont change anything in switch behavior, unless you are using Layer 3 switches. What makes a difference in a switch is COS bits, and i'm not sure how asterisk sets that. I guess to be safe, you would need to create 2 VLANS and in the switch define on VLAN as a high priority VLAN. At least for quite few years (more than 5), layer 2 switches from Nortel (disclaimer, I used to work for NT), would be able to match DSCP (or remark DSCP also, based in l3/l4 information) and give priority as defined by the user, to specific DSCP #, like EF to highest priority and goes on. I've no reason to believe other vendors don't have at least this capability. On Feb 3, 2008 7:06 PM, Michael Graves [EMAIL PROTECTED] wrote: On Sun, 03 Feb 2008 22:11:04 +0100, Benny Amorsen wrote: John Williams [EMAIL PROTECTED] writes: We are tearing out legacy PBX and replacing with Asterisk PBX and new LAN for our 90+ person operation. Question: what QOS capabilities (protocols, etc) does Asterisk support/require in a LAN switch to deliver business grade phone service? Thanks If you have one switch for the whole network, you're generally fine without QoS. Switches these days can handle full bandwidth on all ports at the same time. Anyway, Asterisk is no different from other PBX's when it comes to QoS. Should it turn out that you actually need it on the LAN, just be sure you set the tos parameters in sip.conf to something that is prioritized by the switch. It tends to be more of an issue when you're sending calls over a link with limited bandwidth. Usually more of a concern in the router. Michael -- Michael Graves mgravesatmstvp.com blog.mgraves.org o713-861-4005 c713-201-1262 sip:[EMAIL PROTECTED] skype mjgraves fwd 54245 ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] switch QOS requirements
Theoretically, setting TOS value ( these days called DSCP) wont change anything in switch behavior, unless you are using Layer 3 switches. What makes a difference in a switch is COS bits, and i'm not sure how asterisk sets that. I guess to be safe, you would need to create 2 VLANS and in the switch define on VLAN as a high priority VLAN. On Feb 3, 2008 7:06 PM, Michael Graves [EMAIL PROTECTED] wrote: On Sun, 03 Feb 2008 22:11:04 +0100, Benny Amorsen wrote: John Williams [EMAIL PROTECTED] writes: We are tearing out legacy PBX and replacing with Asterisk PBX and new LAN for our 90+ person operation. Question: what QOS capabilities (protocols, etc) does Asterisk support/require in a LAN switch to deliver business grade phone service? Thanks If you have one switch for the whole network, you're generally fine without QoS. Switches these days can handle full bandwidth on all ports at the same time. Anyway, Asterisk is no different from other PBX's when it comes to QoS. Should it turn out that you actually need it on the LAN, just be sure you set the tos parameters in sip.conf to something that is prioritized by the switch. It tends to be more of an issue when you're sending calls over a link with limited bandwidth. Usually more of a concern in the router. Michael -- Michael Graves mgravesatmstvp.com blog.mgraves.org o713-861-4005 c713-201-1262 sip:[EMAIL PROTECTED] skype mjgraves fwd 54245 ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] switch QOS requirements
Al lists [EMAIL PROTECTED] writes: Theoretically, setting TOS value ( these days called DSCP) wont change anything in switch behavior, unless you are using Layer 3 switches. What makes a difference in a switch is COS bits, and i'm not sure how asterisk sets that. Sadly Asterisk still calls DSCP TOS, so I stuck with Asterisk nomenclature. Modern switches can translate DSCP into COS (lossily) and many do so automatically. With most switches, sending DSCP set to EF will give the traffic priority. Signalling (SIP) is usually set to class AF21; Cisco recommends that CS3 is used instead. Either should work fine with the default setup on many LAN switches. I guess to be safe, you would need to create 2 VLANS and in the switch define on VLAN as a high priority VLAN. That certainly works too. It's just a pain if you use the built-in switches available in most phones. You need to manually tell them to use a different VLAN, or use Cisco-switches with CDP. Most phone manufacturers don't support LLDP for voice VLAN discovery yet. /Benny ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
