avaya ip 500 v2 on seperate subnets 2

[r_al_sim]

Hi i have a network configured to be on 10.0.0.1 255.255.255.0 on this network i have a windows server and a few linux servers and about 20 windows desktops and the odd linux desktop

I have a router that manages DHCP, local DNS, load balancing the the wan and firewall and ad blocking and service blocking (itunes, play store, windows telemtry data)

windows server handles all the windows 10 updates

I wanted to keep the phone system separate from the windows network but on the same switches

so the PBX was configured with as 192.168.1.250 255.255.0.0 and hosts a DHCP server for thant range. The phones I wanted to have every bodies PC's connected to the avaya phones dumb switch port on the back of the handset to save cabling.

so it all works PC's get there IP address from the DHCP server hosted on the router and phones get there DHCP from the PBX people working on the windows PC's have no idea that there is a phone system on the same network it cant be pinged nor can the phones and everyone's phones work fine and have done for months.

but i have two questions over the past month I see some 20,000 ms roundtrip response times logged in the QC tab under system status between devices randomly and I also see packet loss between handsets and PBX when it has an outbound isdn line making a call and alot of heavy data traffice

SQM is enabled on my switches and is cutting the data packets restricting sqm to wan connections only fix's this.

question 1
the ip 500 v2 is only a half duplex 10/100 switch is this device slowing down my 100/1000 switches

question 2
should i just go fully separate switches ( the reason for this simple separation is so i dont have to create complex routing rules just to hide the devices off the shared network device list but to also save space switch wise and office cabling) and BT also wont let me remove the dhcp server from the PBX

thanks

 

[rdoubrava]

You can ignore the alarms in SSA.

 

[pmcook]

That is to be expected when you have many switches all connected to one switch. If you have no QoS issues I'd just ignore it.

 

[rdoubrava]

The network ports are 10/100 full duplex.

 

[pmcook]

It also depends a lot on the switch itself. A little 12 port Netgear does not have the packet switch rate of say an HP ProCurve. Latency caused by broadcast storms is quite common in environments with bargain basement switches.

 

[janni78]

It doesn't say but I assume you put the client network and phone network on a separate VLAN.

"Trying is the first step to failure..." - Homer

 

[gwebster]

Are the network ports fixed to 10/100 full or they have auto-negotiated to that? If they are fixed they may actually be running at half-duplex if the outer end is set to auto-negotiate.

 

[Okkie26]

Auto neg..

 

[r_al_sim]

there is no vlan separating the 192.168.1.x traffic as then i wouldnt be able to use the dumb switch on the back of the avaya phone to plug the pc in on 10.0.0.x

the switches are auto negotiating this is what leads me to believe they will only work as fast as the pbx on the network meaning everything will drop to 10/100

 

[janni78]

You can still connect a PC in the Avaya phone.
It should only tag the "phones" traffice and the PC should be untagged.

Having different subnets on the same switch without separating them with VLANs isn't a good idea, even less so when you have 2 DHCP servers.

"Trying is the first step to failure..." - Homer

 

[mattKnight]

>there is no vlan separating the 192.168.1.x traffic as then i wouldnt be able to use the dumb switch on the back of the avaya phone to plug the pc in on 10.0.0.x


Wrong. That's exactly hoe the phones work

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[janni78]

and BT also wont let me remove the dhcp server from the PBX

Why do they demand that their DHCP server is active?
If it was my network I would send them home again and contact another supplier.

"Trying is the first step to failure..." - Homer

 

[mattKnight]

>Why do they demand that their DHCP server is active?

probably because they have control over it rather than leaving DHCP services for the handsets a the mercy of the IT department

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[r_al_sim]

i'll see what happens with tagging 192.168.1.x into a seperate vlan see if it helps get rid of the jitter i guess it would seperate the broadcast traffic, but Each VLAN requires its own subnet, but each subnet does not require its own VLAN.

My main concern is how do i get the best out of my network without upgrading the PBX

 

[mattKnight]

> but each subnet does not require its own VLAN.

This statement betrays a complete misunderstanding of network concepts. VLAN (802.1q) and subnets operate at different levels of the OSI model.

>My main concern is how do i get the best out of my network without upgrading the PBX

You have some very basic issue that you need to get to grips with. I'd address those first



Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[r_al_sim]

i've tagged 192.168.1.x subnet into a seperate vlan from 10.0.0.x subnet

and did some load testing today if i have 1 call incoming and 3 calls outgoing and 1 call internal i get packet loss of 60 to 90% and calls get interupted

I can see on the netgear switch the processing load is high but not critical

all creating seperate vlans does is isolate the broadcast traffic and also allows me to isolate the routing to prevent it going any further than the switch but i thought i'd do it to see if it made an improvement

the switches say they are negotiating between each other at gigabit speed well only one of these netgear switches are smart so i can see that the router is at gigabit the main switch is gigabit but i cant see what the dumb switch is negotiating at but i assume between the two its gigabit

but the phones and pbx will only negotiate at 10/100

it only seems to be when all 4 isdn lines are making calls do i get drop out, My next step is to put all pbx equipment on seperate 10/00 switches to see if i still get the same issue on the seperate network

 

[janni78]

If you have an issue at only 4 calls that's about 0.4 mbit of network traffic.
How would the switch think that's high load?

"Trying is the first step to failure..." - Homer

 

[Pepp77]

What phones are they?

| ACSS SME |

 

[r_al_sim]

they are avaya 1608 qos are set to L2 audio 6 L2 signaling 6 L3 audio 46

 

[Pepp77]

So any PCs using passthrough on the phones will be limited to 10/100 as that is what the phones are.

| ACSS SME |