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W5-Ethernet-Manual.doc
Version 2.0-01
Watson 5 Ethernet
Operating Manual
Revision: 2006-04-27 3-11
The Ethernet bridge supports the following modes
1) VLAN bridging. Layer 2 VLANs are used to control the traffic. For an Ethernet packet to be sent
from one port to another both ports must be configured to be in the same VLAN. This bridging
mode allows to connect Ethernet user interfaces can be switched to DSL interfaces and vice
versa. It is also possible to switch packets from several DSL interfaces to one Ethernet inter-
face (concentration), to switch packets from an Ethernet or DSL interface to the Management
Processor interface MGMT3 (used for inband management) or to switch packets from DSL to
DSL interface.
2) Transparent bridging. In this mode there is a fixed association between DSL and Ethernet
bridge ports:
Ethernet Bridge
ETH1
ETH2
ETH3
ETH4
DSL1
DSL2
DSL3
DSL4
Ethernet Ports
DSL Ports
Figure 3-5: Transparent bridging
Transparent bridging is similar to the VLAN transparency provided by the Watson 5 Ethernet
tabletop modem, cf. 3.3.2. Transparent bridging lacks the flexibility of VLAN bridging, and in-
band management or linear networks are not supported in this mode. The advantage of trans-
parent bridging is that it is not required to configure any VLAN tags on the bridge, any VID re-
ceived on an Ethernet port will be relayed to the corresponding DSL port and vice versa.
Note that the association between Ethernet and DSL ports is independent of the currently con-
figured multipair mode of the DSL ports. If for example all four DSL wire pairs are combined to
a single DSL span (DSL1) then Ethernet port ETH1 will be associated with DSL port DSL1
while ports ETH2 .. ETH4 and DSL2 .. DSL4 do not carry any traffic at all.
3) Transparent bridging with inband management. This mode is equivalent to the Transparent
bridging mode but allows inband management through the DSL links, cf. 3.5.5.
The bridging modes are controlled by the monitor command BRIDGEMODE.
3.2.3 VLANs
The Watson 5 Ethernet plugin supports VLAN functions according to IEEE 802.1q. Each of the
Ethernet bridge ports (ETH1 .. ETH4, DSL1 .. DSL4, MGMT3) can be member of one or several
VLANs. The maximum number of VLANs is 64. Each VLAN has a VLAN Identifier (VID) between 1
and 4094.
Upon reception of an Ethernet packet at a port its VID is checked against the VIDs of all VLANs this
port is a member of. Packets that do not carry one of these VIDs will be discarded.
For untagged packets the default VID for the port is used to determine VLAN membership.
Packets are only forwarded to ports that are a member of the VLAN of this packet.
Upon transmission the packet will be tagged with the VLAN tag originally received. If the packet
was untagged then the default tag of the receiving port is added to the packet. The port can also be
configured to send the packets untagged.
- Declaration of Conformity 3
- Revision: 2006-04-27 5
- Limited Product Warranty 7
- Table of Contents 9
- Watson 5 Ethernet 11
- Operating Manual 11
- Revision: 2006-04-27 xi 11
- W5-Ethernet-Manual.doc 11
- Version 2.0-01 11
- Revision: 2006-04-27 xiii 13
- 1 Related Documents 15
- 2 Overview 17
- Figure 2-2: Campus Networks 18
- 2.3 Modem Types 19
- 2.4 Accessories 19
- 2-4 Revision: 2006-04-27 20
- 3 Modem Features 21
- 3.1.2 Multipair operation 22
- 3.1.3 Power Backoff 23
- 3.1.5 DSL Performance 23
- 3.1.6 Wetting Current 24
- 3.1.7 Master / Slave 25
- 3.1.8 DSL Clocking 25
- 3.2 Ethernet (plugin modem) 26
- 3.2.3 VLANs 27
- 3.2.4 VLAN Examples 28
- Revision: 2006-04-27 3-13 29
- 3-14 Revision: 2006-04-27 30
- 3.2.6 Stacked VLANs 31
- 3-16 Revision: 2006-04-27 32
- 3.3.1 Ethernet over DSL 33
- 3.3.2 VLAN transparency 33
- 3.3.3 Mixed mode operation 34
- 3.3.4 Cisco HDLC 34
- 3.4 Firmware update 35
- 3.5 Management 35
- 3-20 Revision: 2006-04-27 36
- Revision: 2006-04-27 3-21 37
- Tabletop 38
- Revision: 2006-04-27 3-23 39
- 3.7 Test loops 40
- 3.8 Password protection 40
- Revision: 2006-04-27 3-25 41
- 4 Powering 43
- 5 LEDs and Alarms 45
- 5.2 Tabletop LEDs 46
- 5.3 Alarm Conditions 47
- 5.4 Alarm Relays 47
- 5.5 Initialization Errors 48
- 6 The Monitor 49
- 6.2 Addressing of Plugins 50
- 6.3 Naming of ports 51
- 6.4 Telnet Access 51
- 6.5.1 Welcome Screen 52
- 6.5.2 Menus 52
- 6.5.3 Prefixes an Shortcuts 52
- 6.5.4 Tab completion 53
- 6.5.5 Help 53
- 6.5.6 Command History 53
- 6.5.7 Continuous Displays 53
- 7.1.1 General Commands 55
- 7-2 Revision: 2006-04-27 56
- Revision: 2006-04-27 7-3 57
- 7-4 Revision: 2006-04-27 58
- Revision: 2006-04-27 7-5 59
- 7-6 Revision: 2006-04-27 60
- Revision: 2006-04-27 7-7 61
- 7-8 Revision: 2006-04-27 62
- 7.1.7 VLAN Configuration 63
- 7-10 Revision: 2006-04-27 64
- Revision: 2006-04-27 7-11 65
- 7-12 Revision: 2006-04-27 66
- Revision: 2006-04-27 7-13 67
- 7-14 Revision: 2006-04-27 68
- Revision: 2006-04-27 7-15 69
- 7-16 Revision: 2006-04-27 70
- 7.2.1 Diagnostic 71
- 7.2.2 Status (Plugin) 72
- 7.2.3 Status (Tabletop) 73
- 7.2.4 Alarms 74
- Revision: 2006-04-27 7-21 75
- 7.2.5 Test loops 76
- 7.2.6 Reset Commands 76
- 7.3.1 G.826 Statistics 77
- 7.3.2 Ethernet Statistics 78
- Revision: 2006-04-27 7-25 79
- 7.4.1 Connection control 80
- 7.4.2 Inventory 80
- 7.4.3 Password 81
- 7.4.4 Firmware Upgrade 82
- Revision: 2006-04-27 7-29 83
- 8 SNMP 85
- 8.1.3 The Entity MIB 86
- 8.1.2 SNMP Configuration 86
- 8.1.4 VLAN indexing 87
- 8.2 MIB Reference 88
- 8.2.5 Entity MIB (RFC 2737) 89
- 8.2.6 RMON (RFC 2819) 89
- 8.2.7 IF MIB (RFC 2863) 89
- 8.2.11 MAU MIB (RFC 3636) 90
- 8.2.13 HDSL MIB 91
- 8.2.14 Schmid MIB 91
- 8.2.15 Watson MIB 91
- 9 Front and Rear Panels 93
- 10 Connectors and Cables 95
- 10.1.2 DSL Cable 96
- 10.2 Ethernet Interface 97
- 10.3 Monitor Interface 97
- 10.4 Power and Grounding 98
- 11.1 Interfaces 99
- 11.2 Power Consumption 100
- 11.3 Ethernet 100
- 11.4 Latency and Throughput 101
- 11.5 Management Functions 101
- 11.6 MTBF 101
- 11.7 Environment 102
- 12 Terminology 103
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