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Archive for the ‘Routers’ Category

Nextiva Networking Guidelines

The ideal network involves your Internet Service Provider (ISP) connecting onsite to a stand-alone modem that connects to a router (preferably a router sent to you from Nextiva preloaded with custom Tomato firmware for QoS).  If you have more devices on your network than ports on your router then you can connect a switch to your router to expand the number of ports. 

Issues Involving Double NAT

You must have only one router on your network. Routers preform NAT to allow for multiple computers/devices in your network to connect to the internet. When you connect two routers to your network, in series, you can cause a double NAT which may cause issues with your phones working.

How do you know if you have more than one device performing NAT?

Routers are the only devices that preform NAT and so you just have to make sure that you only have one router. It may be the case that your ISP will sell or provide you with a gateway device that is a modem/router combo device. This device may work fine with Nextiva but you cannot connect another router to it. This will cause a double NAT. 

Issues Involving Firewalls

Firewalls are primarily designed to keep unauthorized traffic from accessing your private network.  In some cases the default firewall rules might cause Nextiva’s traffic to be blocked. The simplest way to avoid issues is to open up inbound and outbound traffic to/from our IP addresses.

How do you ensure your firewall is not blocking Nextiva’s traffic?

Nextiva offers two different platforms and the simplest way to open up connections is to allow all traffic to and from 208.73.144.0/21. This range covers the IP addresses from 208.73.144.0 – 208.73.151.255. If you are not able to open up traffic to this full range of IP's but can open up traffic to individual IP's then you can allow all traffic to the IP's 208.73.144.71 and 208.73.146.95. Those are the IP addresses phones connect to when they try to place calls. 

If you have any questions directly ask an Amazing Service Team member here or email us at support@nextiva.com.

Related articles: What is Tomato Firmware / QoS? What is Double NAT?

How to Set Up: Sonicwall with Nextiva

Inconsistency with hardware/software versions:

The Sonicwall router/firewall has many revisions/versions, including the Standard OS and the Enhanced OS.  Due to the amount of revisions and versions, Nextiva has found the Sonicwall to be inconsistent in how it handles Nextiva VoIP traffic.

Sonicwall Standard OS:

The Standard OS seems to frequently have issues with blocking/disallowing traffic that should normally be accepted.  This version of the Sonicwall is not recommended or supported.

Sonicwall Enhanced OS:

The Enhanced OS seems more consistent and reliable than the Standard OS, but there have been a few revisions of the Enhanced OS that have similar problems as well. This version of Sonicwall is not recommended, but in many cases is supported.

Using Sonicwall With Nextiva:

Nextiva recommends that the phones are connected to a Linksys WRT54GL or a Netgear WNR3500L v2 with custom Tomato firmware to allow for consistency and ideal bandwidth allocation.  In many cases, connecting phones to a router with Tomato and connecting the rest of the network devices to the sonicwall can be accomplished.  It is important that the router that the phones are connected to (with Tomato firmware) is directly connected to the modem.

If you have any questions directly ask an Amazing Service Team member here or email us at support@nextiva.com

How to Set Up: Verizon FiOS with Nextiva

Inability to use Quality of Service (Bandwidth Allocation):

Quality of Service is a function within some routers that allows you to allocate bandwidth to specific devices as needed. Since Verizon FiOS requires the use of their routers, you are incapable of implementing a QoS capable router while using Verizon FiOS Internet.  If you are using Verizon FiOS Internet, you will be required to monitor the bandwidth being used at the location.  If there is too much downloading/uploading on the network it could cause the phone quality to degrade.

Useful Resources:

What is Tomato Firmware / QoS?

If you have any questions directly ask an Amazing Service Team member here or email us at support@nextiva.com

How to Set Up: U-Verse with Nextiva

Problems relating to SIP-ALG:

The U-Verse service requires the customer to use a router that was designed specifically for U-Verse Internet, TV, and phone service.  This router has a default setting called SIP-ALG that cannot be disabled and the router cannot be replaced while using U-Verse internet.  SIP-ALG is a router function that will cause Nextiva’s traffic to be rewritten, which can cause problems such as one way audio, dropped calls, and inbound and outbound call failure.

Nextiva is proactively prepared for this.  Our server will send traffic that avoids this disruptive SIP-ALG functionality, but the phones/devices connected to this network may need to be modified, as well.

If you are familiar with making changes to your voice over IP phone/device, you will want to modify the source port of the phone to a port other than 5060 and reboot the U-Verse router.  If you are not familiar with making this change, we encourage you to contact our support at 1(800) 285-7995 and request assistance.

Inability to use Quality of Service (Bandwidth Allocation):

Quality of Service (QoS) is a function within some routers that allows you to allocate bandwidth to specific devices as needed.  Since U-Verse requires the use of their routers, you are incapable of implementing a QoS capable router while using U-Verse Internet service.  If you are using U-Verse Internet, you will be required to monitor the bandwidth being used at the location.  If there is too much downloading/uploading on the network it could cause the phone quality to degrade.

Useful references:

If you have any questions directly ask an Amazing Service Team member here or email us at support@nextiva.com




 
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