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IPmux-11 Installation and Operation Manual Chapter 4 Diagnostics and Troubleshooting
Frequently Asked Questions 4-19
Framed mode:
In case of local failure on the IPmux, or situation of jitter buffer
underflow/overflow, a conditioning pattern (00 to FF) will be sent towards the
near-end TDM device on the time slots related to that specific bundle. A user-
configurable conditioning pattern can also be applied on the ABCD bits (CAS
signaling 1 to F), going towards the local TDM device.
In this case the synch on the E1/T1 level is maintained in favor of the TDM end
devices.
Question: How can I ensure the IPmux TDMoIP traffic priority over an IP Ethernet
network?
Answer:
The IPmux family is equipped with three different features that can be
implemented in order to give the IPmux TDMoIP traffic priority over an
IP/Ethernet network:
• VLAN ID (Layer 2)
• ToS field (Layer 3)
• UDP destination port (Layer 4)
Each QoS feature is based on a different OSI level and can be used individually in
order to ensure the TDMoIP traffic priority. When determining which feature to
use, it is important to verify that the different elements on the network, (Switches /
Routers / etc.), support the selected priority mechanism and are also configured to
give the highest priority to the labeled IPmux traffic.
Notice that the priority is given to the TDMoIP traffic by the network elements and
the IPmux is merely tagging the packets.
VLAN ID
The IPmux complies with standards IEEE 802.1p&q. This enables the user to set
both VLAN ID and VLAN Priority. It adds four bytes to the MAC layer (Layer 2) of
the Ethernet frame. These bytes contain information about the VLAN ID, and the
VLAN priority, which runs from 0-7. The IPmux only tags the packets, while the
Switches are responsible for giving the priority according to the VLAN info. Verify
that the IPmux traffic has the highest priority in the relevant Ethernet network.
ToS
There are several RFCs (RFC791, RFC1349, RFC2474) that define how the IP ToS
should be configured. The ToS is a byte located in the IP header (Layer 3).
In general the Type of Service octet, in most cases, consists of three fields:
The first field, labeled "PRECEDENCE", is intended to denote the importance or
priority of the datagram.
The second field, labeled "TOS", denotes how the network should make tradeoffs
between throughput, delay, reliability, and cost.
The last field, labeled "MBZ" (for "must be zero") above, is currently unused.
The IPmux enables configuring the whole IP ToS byte, and therefore it is adaptable
to each RFC in the market. The IP ToS parameter in the IPmux is user-configured
in terms of decimal value. However, on the frame itself it of course appears in
binary format. The decimal value varies between 0 and 255 (8 bits).
- IPmux-11 1
- Limited Warranty 4
- General Safety Instructions 5
- Handling Energized Products 6
- FCC-15 User Information 8
- Warning 9
- Quick Start Guide 11
- Configuring Internal Bridge 12
- Contents 13
- Table of Contents 14
- List of Figures 15
- List of Tables 16
- Chapter 1 17
- Introduction 17
- Features 18
- To calculate distance: 19
- TDMoIP Operation Modes 19
- Management 20
- 1.2 Physical Description 20
- 1.3 Functional Description 21
- External Network Timing 22
- Single Source Clock Network 23
- MAC IP UDP 24
- Packet Delay Variation 25
- PDVT (Jitter) Buffer 26
- Ethernet Throughput 27
- Round Trip Delay 28
- OAM Connectivity 29
- End-to-End Alarm Generation 29
- VLAN Traffic Behavior 30
- Ethernet Ports 30
- Rate Limiter Option 31
- 1-16 Functional Description 32
- Table 1-10. Mode C 33
- Table 1-11. Mode D 33
- Table 1-12. Mode E 34
- Table 1-13. Mode F 34
- Table 1-14. Mode G 35
- 1.4 Technical Specifications 36
- Chapter 2 39
- Installation and Setup 39
- 2.3 Installation and Setup 40
- Connecting AC Power 41
- Connecting DC Power 41
- Chapter 3 43
- Operation 43
- 3.2 Operating Instructions 44
- 3.3 Getting Started 45
- Choosing Options 46
- Saving Changes 46
- Web Browser Requirements 46
- Tdm Configuration (T1) 47
- ETH Configuration 47
- Diagnostics Ping 48
- Loopback 48
- Self Test Results 48
- 3.5 Default Settings 49
- 3-8 Default Settings 50
- Default Settings 3-9 51
- 3-10 Default Settings 52
- Chapter 4 53
- Diagnostics and 53
- Troubleshooting 53
- Displaying Events 54
- Clearing Events 55
- Table 4-1. Event List 56
- E1/T1 Statistics 58
- Table 4-2. E1/T1 Statistics 59
- LAN Statistics 62
- Bundle Connection Statistics 63
- 4.3 Diagnostic Tests 67
- 4-16 Diagnostic Tests 68
- 4.4 Troubleshooting 69
- 4.5 Alarm Relay 70
- A.1 E1 and T1 Connector 73
- A.2 Ethernet Connectors 74
- A.3 CONTROL Connector 74
- A.4 External Clock Connector 75
- Appendix B 77
- Boot Sequence and 77
- Downloading Software 77
- Software 78
- Appendix C 81
- SNMP Management 81
- MIB Structure 82
- SNMP Communities 83
- Authentication 84
- Network Management Stations 84
- Appendix D 85
- Configuration Menus 85
- Defining Network Managers 90
- Defining Management Access 91
- Configuring User Access 92
- Masking Alarms 93
- Control Port Parameters 94
- Setting Date and Time 94
- TR-6211 (10 seconds) 98
- Fast (1 Second) 98
- None 98
- Robbed Bit 98
- D.8 Resetting IPmux-11 107
- Figure D-32. Utilities Menu 108
- 48/60VDC~100-240VAC/ 109
- Customer Response Form 111
- Error Report 113
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