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does my VOIP config is correct? (4800G & 3600PWR)

larouanne_l
Occasional Contributor

does my VOIP config is correct? (4800G & 3600PWR)

Hello
 I wonder if the configuration below seems right to a VOIP network.

 The network consists of a core switch in 4800G. This switch performs the routing between vlan 1 (data) and vlan 101 (voice).
 IP phones are connected to the switch in 3600PWR end. A computer can be connected behind a phone.

 Here is the configuration used on the 3600:
 
 acl number 3997                           
 rule 0 permit ip dscp ef
 rule 1 permit tcp destination-port eq www
 rule 2 permit udp destination-port eq snmp
 rule 3 permit udp destination-port eq snmptrap
 rule 4 permit ip dscp cs6
 rule 5 permit ip dscp cs7
#
acl number 4999
 rule 0 permit type 8868 ffff
 rule 1 permit source b4b0-1700-0000 ffff-ff00-0000
 rule 8 deny dest 0000-0000-0000 ffff-ffff-ffff
#
qos-profile default
 packet-filter inbound link-group 4999 rule 8
 traffic-priority inbound ip-group 3997 rule 0 cos voice
 traffic-priority inbound ip-group 3997 rule 4 cos network-management
 traffic-priority inbound ip-group 3997 rule 5 cos network-management
 traffic-priority inbound link-group 4999 rule 1 dscp ef cos voice
 traffic-priority inbound link-group 4999 rule 0 dscp ef cos voice
#
interface Ethernet1/0/X
 poe enable
 stp edged-port enable
 port link-type trunk
 port trunk permit vlan 1 101
 broadcast-suppression pps 3000
 undo voice vlan mode auto
 voice vlan enable
 apply qos-profile default
#
interface GigabitEthernet1/1/4
 port link-type trunk
 port trunk permit vlan 1 101
 priority trust
 description ***Vers_4800G***
#
 voice vlan mac-address b4b0-1700-0000 mask ffff-ff00-0000 description Avaya_Phone
 voice vlan 101 enable
#


The configuration of the voice vlan is correct?
 The QOS is it correct to have a good sound quality? do I have to apply a QOS on the 4800G if it has no IP phone connected to it? (in which case I do not know how to do this type of product ...)
 
 In the pre-requisites of Avaya, we have to declare the QoS priority as follows:
  * Call Control 802.1p priority = 6
  * Audio 802.1p priority = 6
 Is the QOS above corresponds to the pre-requisites?
 

 Last question:
 on this site, we encounter a problem with SIP phones (they can not make or receive calls). Is that the problem could come from the QOS?
 Is the UDP and TCP are routed automatically to the 4800G when routing between the two vlans is active? (asked by integrator VOIP)

 

Thank you for your response and, eventually, for your advice.

 

Laetitia.

 

1 REPLY
ISoliman
Super Advisor

Re: does my VOIP config is correct? (4800G & 3600PWR)

I don't know about the QoS thing but I have a doubt regarding the below:

 

interface Ethernet1/0/X
 poe enable
 stp edged-port enable
 port link-type trunk
 port trunk permit vlan 1 101
 broadcast-suppression pps 3000
 undo voice vlan mode auto
 voice vlan enable
 apply qos-profile default

 

 

if this is an example of the config for ports connected to the phones then this will cause an issue, in voice vlan manual mode the traffic of the phone will be untagged so the PVID of the port should be set to voice vlan, but since you have the pc connected to the phone then the data vlan should b untagged and the voice should be tagged, in this case you will need to use the "voice vlan mode auto" so that the switch will assign the phones to the correct vlan (vlan 101) and tag the traffic, and the port PVID will remain as it is for vlan 1 and the traffic for the clients pc will pass untagged correctly.

 

Double check the voice vlan in the config guide to make sure.