Generalized Multi-Protocol Label Switching (GMPLS) is a protocol suite extending MPLS to manage further classes of interfaces and switching technologies. GMPLS Tutorial and. R&E Network Implementation. An overview of the GMPLS framework, protocol descriptions, open issues, implementations. Part I: MPLS; Part II: GMPLS; Part III: The reality check. Part I: MPLS. Why MPLS? MPLS stands for: “Multi-Protocol Label Switching”; Goals: Bring the speed of.
|Published (Last):||14 February 2010|
|PDF File Size:||5.36 Mb|
|ePub File Size:||15.94 Mb|
|Price:||Free* [*Free Regsitration Required]|
We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Published by Blanche Blair Modified over 3 years ago. Multiplexer Crossbar or multistage space switch. PxP space switch also called switch fabric or interconnection fabric.
Data link layer 3. Once a frame is received correctly, consult routing table with destination MAC address 4. Make appropriate crosspoint connection in fabric 5.
Send frame to appropriate outgoing line card. Functions, layers and protocols needed for the actual transfer of user data Control plane: Support functions and protocols needed at each layer of the data plane.
Moves data units from one link to another —Implementation of the NL at end hosts support role: Each switch determines what the next-hop switch is toward which to route the packet or the call —Source: Ingress switch determines the end-to-end route Loose source route: Routing protocols Two types: The distance table shows the distances to all nodes in the network through each of its neighbors.
The shortest path is then computed and the outgoing port information is stored in the routing table. Shortest path algorithms such as Dijkstra’s are then run to determine the routing tables. For each node that is still not in set M the set containing nodes to which shortest paths from the source have already been computeddetermine if its current distance from s is shorter than if the path came through the selected “next closest node.
Move “next closest node” to set M. Destination Next Hop 22 34 44 54 User-plane packet forwarding Packet header carries destination host interface address unchanged as it passes hop by hop Each CL packet switch does a route lookup to determine the outgoing next hop node or port. Parse message to extract parameter values 2.
Lookup routing table for next hop to reach destination 3. Select timeslots on output port 5.
Construct setup message to send to next hop. Signaling for call setup Tktorial setup actions at each switch on the path: Signaling Connection setup actions at each switch gmple the path: Message parsing to extract parameter values 2. Route lookup for next hop to reach destination 3. Switch fabric configuration 6. User-data flow Packets sent by host I-A with the label field in the packet header set to 1 are switched according to entries in the switch configuration tables at each switch following the path of the established virtual circuit.
Line cards need packet based demultiplexing, space switch needs to be reconfigured on a packet-by-packet basis, need buffering Inherits complexity of packet switches. The signaling procedure described is for immediate-request calls Example: In connection-oriented packet- switched networks, —bandwidth allocation to a ttorial circuit is independent of label selection In circuit-switched networks, —when “labels” are selected e.
Term used for virtual circuits in MPLS networks. Frame Check Sequence new fields. Leon-Garcia and Widjaja’s textbook. Leon-Garcia and Widjaja’s textbook Section. Optical Multiplex Section —OCh: Optical Channel Payload Unit Courtesy: Walker’s tutorial Low layer Higher layers.
Reed-Solomon RScode recommended; roughly introduces a 6. IP tutkrial of the egress node for the tunnel —Tunnel ID: Can be set to the IP address of the ingress node to narrow the scope of the session to the ingress-egress pair.
Routers build an extended link database based on these LSAs that can gmppls used to —Monitor the link attributes.
Identifies a unique LSA to detect losses and duplicates. Covering all except the age field. Some of them are —Link type: Router ID of the neighbor —multi-access links: Extra, Shared, dedicated 1: This could be more than 1.
Planar lightwave circuits for FTTH and GMPLS (Tutorial)
A control channel is a pair gmpl mutually reachable interfaces that are used to enable communication between nodes for routing, signaling, and link management. Verify physical connectivity of data links and dynamically learn the TE link and interface ID associations.
Node 3 downstream node will detect the failure and send a ChannelStatus message to node 2 indicating the failure. Node 2 will immediately acknowledge this message by returning a ChannelStatusAck message. Node 2 will then correlate the message to see if the failure is also detected locally d. If there is no problem on the input side to Node 2 and within Node 2, it means the failure is localized e. Node 2 then sends a ChannelStatus message to node 3 indicating that the failure has been localized and that the gmpps is either failed or OK Presumably, if there was a protection path, Node 2 could quickly restore the channel and send an OK status.
Pseudo-wire Enterprise can allocate IP addresses from one subnet: Space Division Multiplexing Gateway: Gorshe 6 excellent papers. It is a data-link layer protocol.
Why do we need yet another data-link layer protocol? The issue with this framing technique is that if the flag pattern occurs in the payload, an escape byte has to be inserted —This causes an increase in the required bandwidth —The amount of increase is payload-dependent page 98 tutorisl reference.
Cell stream delineation is declared after positive validations of the incoming HEC fields of a few consecutive ATM cells. XOR bit with scrambler output bit that preceeded it by 43 bits —Drawback: Create a superblock 1. Rearrange leading bits at end 3.
Generate and append CRC check bits to form a superblock 4. Repeat creating at least N such superblocks —N: Prepend with GFP core and payload headers 6. Pages 75 and 82 of reference. Rerouting of traffic after failures.
GMPLS Tutorial and R – PowerPoint PPT Presentation
Virtual Private LAN service: Terascale Supernova Initiative —File transfers —Ensight remote visualization general-purpose: Third-party Path message tutoral ERO just before scheduled time 4. Path message Advance-reservations scheduler 1. Maintains bandwidth availability over a time horizon for all links in the domain 3. When request for an advance reservation arrives, try different routes and find one with required bandwidth centralized CAC 6.
Rick Summerhill, Internet2 web site. Generalized Multiprotocol Label Switching: A Systems Approach, L. Yutorial, Morgan Kaufmann Chapter 3. Why do we need it? CS Summer Lecture 8. CS Summer Lecture 9. My presentations Profile Feedback Log out. Auth with social network: Registration Forgot your password?
PPT – GMPLS Tutorial and R PowerPoint presentation | free to view – id: ZDc1Z