Hello Everyone,
I’m in the process of redoing our switch configuration to support our new Voip solution and I would like to hear from all of you to see if I this is an efficient way of setting all this up. The Voip traffic should always have the highest priority
My Questions:
- Some Phones are direct connect to the switch and some phones are sharing the connection with a computer. For an easier distribution of the configuration I would like to set each port like 1/g1 (see config below). Does this work?
- Our Voip-Server is connect to the VLAN 2. The voice server is prioritizing the voice traffic by set dscp flag 46. I would configure the server port like 1/g4. Because of the global dscp trust the voice traffic should be prioritized?
- Some of our DECT basic station are also prioritizing the voice traffic by set dscp flag 46. So I would configure the ports for the DECT APs with dscp like 1/g2. Will the configurations works for this scenario?
- Unfortunately some of the older DECT stations cannot set any dscp flags. I would configure the ports for the DECT APs without dscp like 1/g3 Therefore I would like to ask if my service policy is working and all the traffic from the DECT Aps will be prioritized?
- For the uplink ports to other switches is there anything else I need to setup (interface port-channel 1)? All the other connected Switches are also trust dscp globally.
- Is it necessary to setup “voice vlan data priority trust” for the voice ports? Because I read it in the whitepaper of the 6200 for voice vlan but I’m not sure if it’s necessary to set.
Additional comments are welcome :)
!Current Configuration:
!System Description "PowerConnect 6248, 3.3.14.2, VxWorks 6.5"
!System Software Version 3.3.14.2
!Cut-through mode is configured as disabled
!
configure
vlan database
vlan 2-8,12-17
vlan routing 2 1
vlan routing 3 2
vlan routing 4 3
vlan routing 5 4
vlan routing 6 5
vlan routing 7 6
vlan routing 12 7
vlan routing 13 8
vlan routing 15 9
vlan routing 16 10
vlan routing 17 11
exit
----cut----
diffserv
voice vlan
classofservice trust ip-dscp
classofservice ip-dscp-mapping 46 5
cos-queue strict 5
exit
class-map match-all class_voip ipv4
match vlan 17
exit
policy-map pol_voip in
class class_voip
mark ip-dscp 46
assign-queue 5
exit
exit
!
interface ethernet 1/g1
description "Data & Voice"
spanning-tree auto-portfast
spanning-tree guard root
switchport mode general
switchport general pvid 4
switchport general allowed vlan add 17 tagged
switchport general allowed vlan add 4 untagged
voice vlan 17
voice vlan data priority trust
voice vlan auth disable
lldp med
exit
!
interface ethernet 1/g2
description "DECT-APs"
spanning-tree auto-portfast
spanning-tree guard root
switchport mode access vlan 17
voice vlan 17
voice vlan data priority trust
voice vlan auth disable
no lldp transmit
no lldp receive
exit
!
interface ethernet 1/g3
service-policy in pol_voip
description "DECT-APs without DSCP"
spanning-tree auto-portfast
spanning-tree guard root
switchport mode access vlan 17
voice vlan 17
voice vlan auth disable
no lldp transmit
no lldp receive
exit
!
interface ethernet 1/g4
description "Voip-Server"
spanning-tree auto-portfast
spanning-tree guard root
switchport mode access vlan 2
no lldp transmit
no lldp receive
exit
!
----cut----
interface port-channel 1
description "LWL"
hashing-mode 6
spanning-tree cost 1000
spanning-tree guard loop
spanning-tree mst 0 external-cost 1000
switchport mode trunk
switchport trunk allowed vlan add 2-8,12-17
exit
enable password ***** encrypted
exit
Kind Regards
Axel