XTT 5000 User's Manual
MultiProtocol Label Switching
architecture provides a unified data-carrying
service/simple routing for both circuit-based clients and packet-switching clients
providing a datagram service model.
•
It allows voice, IP, ATM, Frame Relay and Ethernet services all to be carried
on the same network.
•
It can be used with many types of framing, including Ethernet.
•
The Layer 3 label analysis is only just once, when the packet enters the
MPLS
domain. After that, labels are just inspected to continue packet forwarding.
MPLS Structure
The
MPLS header
contains a 'stack’ of one or more labels. A label has four fields:
•
20-bit label value
•
3-bit field for CoS priority (experimental)
•
1-bit bottom of stack flag. If used, it signifies the current label is the last in
the stack
•
8-bit TTL (time to live) field; The Time to Live label will expire at the
conclusion of this number of time-to-live hops.
•
The Experimental field can be used to distinguish classes of service, or per
hop behavior, for differing classes of traffic traveling within the MPLS tunnel
(AKA Label Switched Path - LSP). Alternatively, an LSP carrying a single traffic
class uses the label to determine the per hop behavior of the class.
Where do you want to go next?
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Содержание XTT 5000
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Страница 11: ...XTT 5000 System Monitor Applications Monitor Setup Technology Overview Learn about Ethernet technology 5...
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Страница 52: ...XTT 5000 User s Manual L1 BERT Diagram Home Layer 1 BERT Applications Where do you want to go next Home 46...
Страница 55: ...Throughput Testing L2 BERT Diagram Home Layer 2 BERT Where do you want to go next Home 49...
Страница 58: ...XTT 5000 User s Manual Throughput Stream Results Throughput Test Setup Working Desktop Home 52...
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Страница 67: ...Throughput Testing Throughput Aggregate Results Throughput Stream Results Home 61...
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Страница 147: ...Save Features 141 RFC2544 NE Applications IP Test Setup Monitor Setup Loopback Test Setup Home...
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Страница 181: ...Index 175 X XFP 40 XFP Port Setup 40...