Standard for Media Converters correction 2 .

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What is a
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Standard for "Media Converters" amendment 2 Norman Finn Cisco Systems

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What is a "Media Converter"

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Why imagine a "Media Converter"? Why not utilize a two-port Bridge? A division gadget on the Customer\'s premises is helpful for characterizing and checking administrations. This is innately a two-port capacity. Shared media are never present, at any rate on the up-connection.

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Why concoct a "Media Converter"? Why not utilize a two-port Bridge? (proceeded with) So, neither of an extension\'s two most evident capacities, MAC address sifting and circle anticipation, are required. All other scaffold capacities are expansions of the separating and circle avoidance capacities. Each one of those extension capacities asks for alternatives, setup, and administration.

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Why design a "Media Converter"? Why not utilize a Repeater (Hub)? As proposed by the name, a "Media Converter" regularly changes over between various media , e.g. SONET or DSL, and Ethernet. A "Media Converter" here and there believers between various speed media. Administration of a Repeater would be noticeable to, and could be subverted by, the Customer.

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Why design a "Media Converter"? Why ought to 802.1 get to be distinctly included? Existing "Media Converters" have genuine blames, and revising them is troublesome without any standard. (The essential blame is that a disappointment of one connection is not transferred to the next connection.) IEEE 802 knows Ethernet best. This standard must be medium autonomous.

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So, what is a Media Converter? It is a two-MAC transfer gadget . It is as straightforward as could reasonably be expected, both to Bridges and to Layer 2 Stations. It doesn\'t settle on sending choices aside from, maybe, to bolster its "cerebrum" and to bolster IEEE Std. 802.3ah OAM. It must be remotely diagnosable, however just through the Provider port. A disappointment of one connection must be motioned to the next connection.

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Two-MAC Relay Device

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Two-MAC Relay Device Up PHY Up MAC Relay/Brain Down MAC Down PHY Media Converter is a "Transfer/Brain" work with two MAC/PHYs. A "Macintosh/PHY" might be a 802 medium (normally 802.3) or an imitated 802 medium (e.g. Ether-over-SONET). 802.1 must supply the snares for different associations to fit their Ether-over-XYZ determinations into this model.

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Transparent to Bridges and Stations

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Transparent to Bridges and Stations Up PHY Up MAC Relay/Brain Down MAC Down PHY All 802.1 conventions (Spanning Tree, GARP, 802.1X, LLDP, LinkSec, KeySec) must go through. All higher layer conventions must go through. Media Converter\'s own MAC address (if utilized) must be caught.

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Transparent to Bridges and Stations Up PHY Up MAC Relay/Brain Down MAC Down PHY 802.3X Pause can\'t go through straightforwardly. We should choose what part Pause plays. (None? Speed coordinating? Uplink just?) 802.3ah OAM ought to oversee in any event the Up connection, and maybe the Down connection. We should choose whether LinkAgg goes through. (Straightforward? Drop? Play?)

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Must Support a "Mind" Function

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Must Support a "Cerebrum" Function Handling 802.3X Pause and 802.3ah OAM takes a specific measure of insight. We should choose whether access to the MAC address of no less than one of the ports, for unicast movement, ought to be permitted by the standard. This would permit better control of the gadget. Be that as it may, this may open excessively numerous ways to augmentations. Do we truly need a range of gadgets amongst Bridges and Repeaters?

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Remotely Diagnosable

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Remotely Diagnosable Provider Bridge Media Converter Customer Equipment 1 2 IEEE Std. 802.3ah OAM can without much of a stretch oversee Link 1. We should oversee Link 2. Burrow .3ah OAM more than .3ah OAM? Utilize Layer 2 SNMP to control MC\'s MIBs? Most likely not CFM MIP amongst PB and CE.

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Remotely Diagnosable Provider Bridge Media Converter Customer Equipment A B C Loopback is required. An and B ways, at any rate. C way is extremely attractive, if Customer participates. Broadening 802.3ah OAM fills this prerequisite pleasantly.

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Signaling Link Failures

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Signaling Link Failures Provider Bridge Media Converter Customer Equipment 1 2 A disappointment of Link 2 must be accounted for to the Provider Bridge. A disappointment of Link 1 must be accounted for to the Customer Equipment. How? Dropping the connection (Link Integrity Clauses of IEEE 802.3) is ensured to work. Might 802.3ah OAM be stretched out as an option? For one or both issues?

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Other Possibilities

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Other Possible Functions Adding 802.1p lines are conceivable, however … This would require 802.1Q or 802.1ad labels. Which? What number of lines? What depleting calculation? Making the gadget symmetrical would permit its utilization in more situations, yet … Making it symmetrical may make it unfit for the Provider – Customer utilize.

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Project Authorization Request

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PAR: Scope This standard determines the capacity of a Two-Port MAC Relay, and the conventions and strategies to bolster its operation. A TPMR is straightforward to all edge based conventions aside from a few or those characterized by IEEE Std. 802.3, is remotely diagnosable by means of 802.3ah OAM through one of its ports, and flags a disappointment of either MAC\'s connection to the next MAC.

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PAR: Purpose The wide and developing organization of Ethernet Provider Services has made an interest for straightforward two-port division gadgets that interface two 802 media or 802 media copies. The absence of principles for such gadgets, and especially for connection misfortune flagging and remote finding, is hindering the development of this industry. A Two-Port MAC Relay standard will incredibly enhance this circumstance.

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Five Criteria: Broad Market Potential Public systems speak to another and extremely wide application space for IEEE 802 advancements and particularly for Provider Bridges (P802.1ad) and Ethernet in the First Mile (802.3ah). Various merchants and potential clients (the Service Providers) have communicated the need to incorporate Ethernet connect innovations with their current framework requiring little to no effort, while giving the reasonability and remote analytic capacities customarily offered by circuit exchanged advances.

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Five Criteria: Compatibility The Two-Port MAC Relay will be perfect with other indicate point 802 LANs and stations, and with every one of the 802.1 Bridge guidelines. A base arrangement of oversaw items, perfect with the limited usefulness of the TPMC, will be characterized.

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Five Criteria: Distinct Identity Existing 802 benchmarks characterize Repeaters, which are straightforward and have no MACs, and Bridges, which are less straightforward, and have MAC address sifting and circle counteractive action abilities. The TPMR has MACs and casing cradles, middle of the road straightforwardness, and no address separating or circle avoidance. As a different report from media guidelines and from the 802.1 Bridge measures, it will be effectively found.

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Five Criteria: Technical Feasibility Numerous merchants supply gadgets with either pretty much usefulness than the Two-Port MAC Relay. The couple of curiosities in the meaning of the different capacities are clear expansions of existing abilities.

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Five Criteria: Economic Feasibility The presence of generally low-volume Media Converters and high-volume two-port Home Routers exhibits that the TPMR ought to be financially practical. Establishment cost is known to exceed unit cost in Home Routers; the disposal of required design in the TPMR guarantees to invert this irregularity.

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30 PAR for "Media Converters" r2 IEEE 802.1 between time, October, 2004

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