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This page contains answers to common questions handled by our support staff, along with some tips and tricks that we have found useful and presented here in the form of questions.
Q1: What is ZyFIND technology?
A: ZyFIND is a protocol developed by ZyTrax that allows a ZyTrax Router connected to the local to be discovered (Routers respond with their IP address, serial number and Name) irrespective of the current IP addressing on the local LAN. The protocol allows the Routers IP address to be changed in situ and without resorting to clumsy and crude solutions such as using a serial interface. to do IP address allocation and subsequent changing.
Q2: I don't know the IP address of my Router, how do I find it?
A: If ZING is loaded click Info from the menu select Diagnostic, then Display Routers this will display a list of all ZyTrax Routers connected to your local LAN. Or load CoolFig and click on the Diagnostic button to display a list of all ZyTrax Router IP addresses connected to the local LAN. CoolFig and Control Server (NT_Ser) both support this feature as well.
Q3: When I load CoolFig (or Zing or HotFig) I get the message "zsock.ocx" not registered?
A: CoolFig (ZING and HotFig) all use a ZyTrax supplied ActiveX control called zsock.ocx which is installed in the system32 directory of your PC. If you cannot find this control in the system32 directory, re-install any of the ZyTrax supplied utilities. If the control is present it may not have registered correctly of you may have had registry problems and it has become unregistered. To register the control select run from the start bar and enter the command regsvr32 /v zsock.ocx (without the quotation marks). If the operation is successful the message DllSelfRegister zsock.ocx succeeded will appear.
Q4: What are the Zsock.ocx and Subnet.ocx files installed with CoolFig and HotFig (zsock.ocx is also used by ZING)?
A: These files are ActiveX controls. Zsock.ocx translates the socket interface and the Windows icmp.dll interface into Visual Basic friendly services. Subnet.ocx is a special control to calculate subnets and perform other specialized IP address arithmetic.
Q5: My Router shows the IP address 220.127.116.11 when I use CoolFig or ZING diagnostics, what does this mean?
A: Each ZyTrax Router maintains its configuration details (including its IP address) in an SNMP MIB maintained in on board FLASH. If this FLASH has become corrupted for any reason it is re-initialized to the special IP address 18.104.22.168 (an Internet Test address). to restore the configuration load CoolFig, select the IP address then run Update Router (Full) from the file menu of the Toolbar button. This is a serious problem and you should also submit an incident report to ZyTrax indicating what events were taking place when this MIB loss occurred.
Q6: What is MPPP?
A: MPPP is Multilink Point-to-Point protocol defines by the Internet Engineering Task Force (IETF) in the specification rfc1990. MPPP is sometimes incorrectly referred to as bonding (which was a rival now moribund specification). MPPP uses the term bundling.
Q7: What is a Class C (or B or A) IP address?
A: The Internet has defined 5 classes of IP address based on the first 3 bits of the IP address. The three most commonly used classes are A, B and C.
Class A addresses have 16,777,216 host addresses available (in tech jargon the host id is 24 bits long).
Class B addresses have 65,536 host addresses available (in tech jargon the host id is 16 bits long).
Class C addresses have 256 addresses available (in tech jargon the host id part is 8 bits long).
Increasingly Class D addresses are becoming more common because they are used in IP Multicasting.
Q8: Can I monitor the performance and availability of my Web site (or ftp site) using Zing?
A: You can do anything with Zing. Yes, to change the target IP address used by Zing select the Info button, then from the Options menu, select System Defaults. Enter the IP address you want to monitor in the Target IP address box. Zing will continue to use this address (even on reload) until give it another address.
Q9: Can I change the interval between Network Probes in Zing.
A: Yes, to change the time between Network Probes select the Info button, then from the Options menu select System Defaults. Enter the required value in seconds (must lie in the range 1 to 300) in the Network timer box. NOTE: Zing checks the minimum interval so as not to keep any connections open unnecessarily and will not let you set a timer value less that the minimum Threshold Period (default is 30 seconds).
Q10: How do I change the Threshold Timer interval in Zing?
A: On versions of CoolFig before 1.1.2 select the SNMP display for the Router and expand the zmpTable entry (zytrax/router/zmp). Double click the entry zmpThresholdPeriod and change the required entry (ies) to the value you want. From CoolFig version 1.1.2 onward the Router Wizard provides the ability to set this value under the Advanced Options button in Step 6 for any Route. Once the configuration has been defined in the Router Summary screen expand the Remote Route entry for which you want to make the change until you see the entry Threshold Period, double click this entry and enter the required value.
Q11: What is a Network Probe?
A: Zing issues Network Probe sequences to discover the status of the network through to the nominated Target IP address. a Network Probe sequence consists of a series of Pings (ICMP Echo requests) with an increasing Time to Live count until the required end point is reached.
Q12: How do I tell the IP address and performance of any of the Router hops?
A: Zing provides two methods. The first method involves placing the mouse over the Router hop in which you are interested, after about 1 second the IP address, Current Ping response time (C=) Average Response Time (A=) and Average Window Response Time (WA=) are displayed. The second method involves clicking the Info button. statistics for all the Router hops to the Target IP address are displayed in the Network Stats window.
Q13: In Zing how to I tell my average Router performance?
A: Zings Gas Gauges give performance for the last 8 seconds for Input and Output traffic. Placing the mouse over the gauges will give the Average Performance since Zing was loaded (A=) and the Average Window Performance (WA=) after about 1 second.
Q14: What sort of performance should I get from my ZyTrax Router?
A: This depends on a lot of variables, but we have benchmarked the router at over 15.7K bytes per second in both directions simultaneously (over 31.4K throughput). The actual performance you can achieve depends on a number of factors:
- The speed of the end system you are connected to (web sites, FTP sites etc.)
- Network congestion and delays.
- The performance of the Access Router you are connected to.
- The fragmentation strategy of the Access Router you are connected to.
- The Speed and Performance of your PC.
Q15: What do you mean by the Access Router Fragmentation strategy?
A: The MPPP (Multi-Link Point to Point Protocol) specification allows for fragmentation of blocks when sending across a bundle of links. Some Access Routers fragment all blocks of greater than 100 or so bytes into fragments in the mistaken belief that this allows load balancing. In practice it has a negative impact on average loads consuming CPU resources unnecessarily at both ends of the link. Ask your ISP to configure the access router to use fragmentation only when blocks are larger than the MRRU (Maximum Receive Unit) for the link (your ZyTrax Router defaults to 1518 bytes). The total impact on performance of excessive fragmentation is 1 2%. Not a lot but you are paying for it!
A: Certain very popular sites do not respond to ping traffic in order to reduce loads on their systems, (Microsoft among many others does this). If your intention is to monitor any of these sites you cannot do it, but if you intention is to see the performance of the Route to these sites set the Target IP address to the IP address immediately before the site you are interested in.
A: Zing uses a Sliding Window of 10 times the current Network Probe timer. The default Network Probe Time is 60 seconds, giving a default window of 10 x 60 = 600 sec. or 10 minutes. The window period is designed to reflect the current traffic pattern (a moving or 'short-term' average) rather that the overall ('long-term') average since Zing was loaded.
Q18: Can I log Zing data to disc and review later?
A: Zing has a logging facility which is turned on by clicking Info then selecting Log (Auto) or Log (User) from the Options menu. Log(Auto) opens and Appends data to the file Zing for HotPools.txt in the directory from which Zing was loaded (by default c:\Program files\zytrax\zing. Log (User) allows you to choose the filename and location for the log file. In all cases the log file can be read by a standard text editor such as Notepad.
Q19: Can I monitor my connection time (Bytes or Packets transferred) using Zing?
A:From version 2.0 of Zing and from version 69 of the Router application using 'Info', Statistics -> User Stats Zing will display the following statistics:
- User Name
- Date of Last Reset
- Total time Connected since last reset
- Bytes In since last reset
- Bytes Out since last reset
- Packets In since last reset
- Packets Out since last reset
- Maximum Speed of Link
- Directory Numbers of the remote service
You can reset the counts with the Reset button provided (Resets Connection time, Bytes In & Out, Packets In & Out and updates the Reset Date after logging to Log (Auto) file.).
NOTE: You must have an active connection to do this (at least one of the B Channel indicators must be Green). If either there is no connection or version 69 (or greater) of the application is not loaded the User Stats menu entry will be disabled (grayed out).
Q20: I am having problems running ZING (gives incorrect or strange results)
A:Zing is written in Microsoft Visual Basic Version 6. It is possible that some of your system files are corrupt or out of date. You should obtain the latest versions of these files from Microsoft (Knowledge Base Article Number Q192461). To obtain the latest files proceed as follows:
- Load your browser
- Go the microsoft support Site http://support.microsoft.com
- In the 'Knowledge Base Search' Frame
- In Question 1 select 'Visual Basic'
- In Question 2 click 'Specific Article ID number'
- In box 3 enter Q192461
- Click 'Go'
- This will display a single entry - click on this entry to go to the article.
- In the 'More Information' section you will find a reference to 'vbrun60.exe' clicking this will download the updated files.
- Follow the instructions to perform the update.
NOTE: You should unload ZING prior to performing the update above.
Problems, comments, suggestions, corrections (including broken links) or something to add? Please take the time from a busy life to 'mail us' (at top of screen), the webmaster (below) or info-support at zytrax. You will have a warm inner glow for the rest of the day.