interface specifier. For example, the following command specifies a Gigabit Ethernet
interface on port 0 of the IOA installed in the upper adapter bay of slot 3.
host1(config)#
interface gigabitEthernet 3/0/0
For more information about interface types and specifiers on E Series models, see
Interface Types and Specifiers in
JUNOSe Command Reference Guide
.
Related Topics
■
Interface Types and Specifiers
Ethernet OAM Link-Fault Management References
For more information about 802.3ah link-fault management implementations, consult
the following resources:
■
IEEE 802.3ah-2004 (Clause 57, Operations, Administration, and Maintenance
[OAM])—Media Access Control Parameters, Physical Layers, and Management
Parameters for Subscriber Access Networks
■
IEEE 802.3ah-2000—Part 3: Carrier Sense multiple access with collision detection
(CSMA/CD) access methods and physical layer specifications
OAM Messages
Because 802.3ah is an optional component and not all functionalities of OAM might
be supported on a particular system, discovery mechanisms are used to ascertain
the presence and capabilities of the remote peer.
Transmitted Ethernet OAM messages or OAM PDUs are of standard length, untagged
Ethernet frames within the normal frame length limits in the range 64–1518 bytes.
The maximum OAM PDU frame size exchanged between two peers is determined
during the discovery phase. OAM PDUs contain the destination MAC address of the
slow protocols multicast (0180.c200.0002) and an Ethertype of 8809. In a slow
protocol environment, the bandwidth required is minimal and the frame transmission
rate is limited to a maximum of 10 frames per second. The first octet of the frame
payload is the slow protocol subtype field and is set to 0x03. OAM PDUs do not travel
beyond a single hop and are transmitted at a rate limited to a maximum of 10 OAM
messages per second. Certain OAM PDU types might be transmitted multiple times
to improve the probability of their successful receipt on degrading, lossy links. Figure
30 on page 230 shows the OAM PDU format.
Figure 30: OAM PDU Format
Ethertype = 8809
Destination Address =
01-80-c2-00-00-02
Source Address
Frame Check Sequence
Slow protocol subtype = 0x03
Flags
Code
OAM Data / Pad
Payload
g016519
230
■
Ethernet OAM Link-Fault Management References
JUNOSe 11.1.x Link Layer Configuration Guide
Содержание JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010
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Страница 8: ...viii JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 26: ...xxvi List of Figures JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 34: ...2 Chapters JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 200: ...168 Monitoring Upper Level Protocols over Ethernet JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 230: ...198 Monitoring VLAN and S VLAN Subinterfaces JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 258: ...226 Monitoring 802 3ad Link Aggregation JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 334: ...302 Troubleshooting JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 394: ...362 Monitoring Multiclass MLPPP JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 406: ...374 Monitoring POS JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 468: ...436 Troubleshooting JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 498: ...466 Monitoring Bridged Ethernet JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 546: ...514 Monitoring Cisco HDLC JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 747: ...Part 2 Index Index on page 717 Index 715...
Страница 748: ...716 Index JUNOSe 11 1 x Link Layer Configuration Guide...
Страница 774: ...742 Index JUNOSe 11 1 x Link Layer Configuration Guide...