1. How can I
manage Prestige 661?
Menu driven user interface for easy network management Local and remote
console management
Web configurator
2. What is the default user name and password to login web configurator?
The default user name is 'admin' and password is '1234'.
You can change the password when login to web configurator in the Advanced
Setup->Password menu.
Please record your new password whenever you change it. The
system will lock you out if you have forgotten your password.
3. How do I know the P661's WAN IP address assigned by the ISP?
You can view "My WAN IP <from ISP> : 200.1.1.1" shown in menu 24.1 to check this IP address.
4. What is the microfilter or splitter used for?
Generally, the voice band uses the lower frequency ranging from 0 to 4KHz, while ADSL data transmission uses the higher frequency. Because of this reason ADSL are able to pass voice and data at the same time. The splitter is act as an high/low pass filter, It has 3 port, one connect to line from ISP (typically your wall phone jack), 1 port with high pass filter to ADSL CPE, 1 port with low pass filter to your telephone. The splitter's purpose is to split the voice to telephone and data to ADSL CPE to ensure no interfere between voice and data.
If you have telephone installed on the ADSL line before the splitter and you are hearing unexpected noise from your phone, you may need an microfilter. The microfilter acts as a low-pass filter for your telephone set installed before the splitter to ensure that ADSL transmissions (high frequency) do not interfere with your voice transmissions (Low frequency). For the details about how to connect the microfilter please refer to the user's guide.
5. The P661 supports Bridge and Router mode, what's the difference between them ?
When the ISP limits some specific computers to access Internet, that means only the traffic to/from these computers will be forwarded and the other will be filtered. In this case, we use bridge mode which works as a ADSL modem to connect to the ISP.. The ISP will generally give one Internet account and limit only one computer to access the Internet.6. How do I know I am using PPPoE?
PPPoE requires a user account to login to the provider's server. If you need to configure a user name and password on your computer to connect to the ISP you are probably using PPPoE. If you are simply connected to the Internet when you turn on your computer, you probably are not. You can also check your ISP or the information sheet given by the ISP. Please choose PPPoE as the encapsulation type in the Prestige if the ISP uses PPPoE.
7. Why does my provider use PPPoE?
PPPoE emulates a familiar Dial-Up connection. It allows your ISP to provide services using their existing network configuration over the broadband connections. Besides, PPPoE supports a broad range of existing applications and service including authentication, accounting, secure access and configuration management.
8. What is DDNS?The Dynamic DNS service allows you to alias a dynamic IP address to a static hostname, allowing your computer to be more easily accessed from various locations on the Internet. To use the service, you must first apply an account from several free Web servers such as http://www.dyndns.org/.
Without DDNS, we always tell the users to use the WAN IP of the Prestige 661 to reach our internal server. It is inconvenient for the users if this IP is dynamic. With DDNS supported by the Prestige 661, you apply a DNS name (e.g., www.zyxel.com.tw) for your server (e.g., Web server) from a DDNS server. The outside users can always access the web server using the www.zyxel.com.tw regardless of the WAN IP of the Prestige 661.
When the ISP assigns the Prestige 661 a new IP, the Prestige 661 updates this IP to DDNS server so that the server can update its IP-to-DNS entry. Once the IP-to-DNS table in the DDNS server is updated, the DNS name for your web server (i.e., www.zyxel.com.tw) is still usable.
9. When do I need DDNS service?When you want your internal server to be accessed by using DNS name rather than using the dynamic IP address we can use the DDNS service. The DDNS server allows to alias a dynamic IP address to a static hostname. Whenever the ISP assigns you a new IP, the Prestige 661 sends this IP to the DDNS server for its updates.
10. What is DDNS wildcard? Does the Prestige 661 support DDNS wildcard?Some DDNS servers support the wildcard feature which allows the hostname, *.yourhost.dyndns.org, to be aliased to the same IP address as yourhost.dyndns.org. This feature is useful when there are multiple servers inside and you want users to be able to use things such as www.yourhost.dyndns.org and still reach your hostname.
Yes, the Prestige 661 supports DDNS wildcard that http://www.dyndns.org/ supports. When using wildcard, you simply enter yourhost.dyndns.org in the Host field in Menu 1.1 Configure Dynamic DNS.
11. Can the Prestige's SUA handle IPSec packets sent by the IPSec gateway?Yes, the Prestige's SUA can handle IPSec ESP Tunneling mode. We know when packets go through SUA, SUA will change the source IP address and source port for the host. To pass IPSec packets, SUA must understand the ESP packet with protocol number 50, replace the source IP address of the IPSec gateway to the router's WAN IP address. However, SUA should not change the source port of the UDP packets which are used for key managements. Because the remote gateway checks this source port during connections, the port thus is not allowed to be changed.
12. How do I setup my Prestige for routing IPSec packets over SUA? For outgoing IPSec tunnels, no extra setting is required.For forwarding the inbound IPSec ESP tunnel, A 'Default' server set in menu 15.2.1 is required. It is because SUA makes your LAN appear as a single machine to the outside world. LAN users are invisible to outside users. So, to make an internal server for outside access, we must specify the service port and the LAN IP of this server in Menu 15. Thus SUA is able to forward the incoming packets to the requested service behind SUA and the outside users access the server using the Prestige's WAN IP address. So, we have to configure the internal IPsec as a default server (unspecified service port) in menu 15.2.1 when it acts a server gateway.
Traffic Shaping is a feature in the Prestige. It allocates the bandwidth to WAN dynamically and aims at boosting the efficiency of the bandwidth. If there are several VCs in the Prestige but only one VC activated at one time, the Prestige allocates all the Bandwidth to the VC and the VC gets full bandwidth. If another VCs are activated later, the bandwidth is yield to other VCs after ward.
14. What do the parameters (PCR, SCR, MBS) mean?
Traffic shaping parameters (PCR, SCR, MBS) can be set in Menu 4 and Menu 11.6 and is
valid for both incoming and outgoing direction since G.shdsl is symmetric.
Peak Cell Rate(PCR): The maximum bandwidth allocated to this
connection. The VC connection throughput is limited by PCR.
Sustainable Cell Rate(SCR): The least guaranteed bandwidth of a VC.
When there are multi-VCs on the same line, the VC throughput is guaranteed by SCR.
Maximum Burst Size(MBS): The amount of cells transmitted through
this VC at the Peak Cell Rate before yielding to other VCs. Total bandwidth of the line is
dedicated to single VC if there is only one VC on the line. However, as the other VC
asking the bandwidth, the MBS defines the maximum number of cells transmitted via this VC
with Peak Cell rate before yielding to other VCs.
The Prestige 661 holds the parameters for shaping the traffic among its virtual channels. If you do not need traffic shaping, please set SCR = 0, MBS = 0 and PCR as the maximum value according to the line rate (for example, 2.3 Mbps line rate will result PCR as 5424 cell/sec.)
15.Why do we perform traffic shaping in the Prestige 661?
The Prestige 661 must manage traffic fairly and provide bandwidth allocation for different sorts of applications, such as voice, video, and data. All applications have their own natural bit rate. Large data transactions have a fluctuating natural bit rate. The Prestige 661 is able to support variable traffic among different virtual connections. Certain traffic may be discard if the virtual connection experiences congestion. Traffic shaping defines a set of actions taken by the Prestige 661 to avoid congestion; traffic shaping takes measures to adapt to unpredictable fluctuations in traffic flows and other problems among virtual connections.
All contents copyright (c) 2005 ZyXEL Communications Corporation.