Recommendation Information

  1. This router does not have SIP ALG - confirmed on Hardware Version 2, firmware version: 3.17.38 Build 140613 Rel.55867n.
  2. The Bandwidth Control engine is powerful and effective, especially for an economical router.

Known Issues

  1. DNS server addresses need to be changed to set of efficient DNS servers, like Google's DNS or another DNS, to prevent intermittent registration failures on Polycom phones.
  2. DNS proxy/relay is enabled by default but it can be disabled.
  3. WAN ping response to our Call Quality Monitoring and Troubleshooting Server, 64.28.122.100, needs to be enabled.

Resolution

  1. Login to the router.
  2. Under the Status page, write down the Firmware & Hardware Version.
      • The steps below apply to the following:
        • Hardware Version: 2
        • Firmware Version: 3.17.38 Build 140613 Rel.55867n
      • If you are running an older firmware version, upgrade to at least the firmware version above.
      • If you are running a newer firmware version, let Intermedia know so that we can verify if the newer version.
  3. Go to Security > Basic Security:
    • SPI Firewall: Leave Enabled.
    • ALG: Leave all Enabled.
  4. Go to Security > Advanced Security:
    • DoS Protection: Disabled is the default state.
      • If you need it Enabled, then set the following:
        • Enable ICMP-FLOOD Attack Filtering: Unchecked.
        • ICMP-FLOOD Packets Threshold (5 ~ 3600): 50 Packets/s.
        • Enable UDP-Flood Filtering: Unchecked.
        • UDP-FLOOD Packets Threshold (5 ~ 3600): 500 Packets/s.
        • Enable TCP-SYN-FLOOD Attack Filtering: Unchecked.
        • TCP-SYN-FLOOD Packets Threshold (5 ~ 3600): 50 Packets/s.
        • Ignore Ping Packet From WAN Port: Unchecked.
          • Needed for to allow the router to respond to our Call Quality Monitoring and Troubleshooting Server, 64.28.122.100.
        • Forbid Ping Packet From LAN Port: Unchecked.
          • Needed for troubleshooting network issues that can affect the phones.\
  5. This step is needed to prevent and resolve call and fax quality issues.
    1. Go to DHCP > DHCP Settings:
      • Take note of the Start and End IP Addresses. 
      • You will need list later.
    2. Go to Bandwidth Control > Control Settings:
      • Enable Bandwidth Control: Checked.
      • Line Type: Select ADSL or Other, depending on who your ISP is.
      • Egress Bandwidth:
        • Enter in only 80-95% of your Upload speed.
        • If you do not know, estimate the Upload speed by taking the average of 3 bandwidth tests at speedtest.net.
        • Or you can contact your ISP.
      • Ingress Bandwidth:
        • Enter in only 80-95% of your Download Speed.
        • If you do not know, estimate the Download speed by taking the average of 3 bandwidth tests at speedtest.net.
        • Or you can contact your ISP.
           
      • Click Save.
    3. Go to Bandwidth Control > Rules List > Add New.
      • Enable: Checked.
      • IP Range: Enter in the Start and End IP Addresses from step 4a.
      • Port Range:
        • For Hosted PBX 2.0, 30000 - 50000
        • For Hosted PBX 1.0, 35000 - 65000
      • Protocol: UDP.
      • Egress Bandwidth (Min): Calculate (50 * each-phone) + (100 * each-fax-adapter).
      • Egress Bandwidth (Max): Calculate (100 * each-phone) + (100 * each-fax-adapter).
      • Ingress Bandwidth (Min): Use the same number as Egress Min.
      • Ingress Bandwidth (Max): Use the same number as Egress Max.
      • Click Save.
  6. This step is only needed if you have or plan to purchase Polycom phones:
    • The steps below can take your phones and computers offline for 10 minutes or much longer if an unexpected problem arises.
    • Make sure only do to these steps during a time when you can afford to take your network offline.
      • Go to DHCP > DHCP Settings:
        • Primary DNS: "8.8.8.8".
        • Secondary DNS: "8.8.4.4".
        • Click Save.
      • Reboot all Polycom phones and any computers that cannot load webpages.