729904

ZyXEL VMG3927-T50K Manual

363
Zoom out
Zoom in
Previous page
1/421
Next page
Chapter 42 Diagnostic
VMG/XMG Series User’s Guide
363
CHAPTER 42
Diagnostic
42.1 Diagnostic Overview
The Diagnostic screens display information to help you identify problems with the Zyxel Device.
The route between a Central Office Very-high-bit-rate Digital Subscriber Line (CO VDSL) switch and one
of its Customer-Premises Equipment (CPE) may go through switches owned by independent
organizations. A connectivity fault point generally takes time to discover and impacts subscriber’s
network access. In order to eliminate the management and maintenance efforts, IEEE 802.1ag is a
Connectivity Fault Management (CFM) specification which allows network administrators to identify
and manage connection faults. Through discovery and verification of the path, CFM can detect,
analyze and isolate connectivity faults in bridged LANs.
42.1.1 What You Can Do in this Chapter
• The Ping & TraceRoute & NsLookup screen lets you ping an IP address or trace the route packets take
to a host (Section 42.3 on page 364).
• The 802.1ag screen lets you perform CFM actions (Section 42.6 on page 367).
• The 802.3ah screen lets you configure link OAM port parameters(Section 42.5 on page 366).
• The OAM Ping screen lets you send an ATM OAM (Operation, Administration and Maintenance)
packet to verify the connectivity of a specific PVC. (Section 42.6 on page 367).
42.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
How CFM Works
A Maintenance Association (MA) defines a VLAN and associated Maintenance End Point (MEP) ports
on the device under a Maintenance Domain (MD) level. An MEP port has the ability to send
Connectivity Check Messages (CCMs) and get other MEP ports information from neighbor devices’
CCMs within an MA.
CFM provides two tests to discover connectivity faults.
• Loopback test - checks if the MEP port receives its Loop Back Response (LBR) from its target after it
sends the Loop Back Message (LBM). If no response is received, there might be a connectivity fault
between them.
… 363 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for ZyXEL VMG3927-T50K at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of ZyXEL VMG3927-T50K in the language / languages: English as an attachment in your email.

The manual is 14,37 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info