2 Comments on “Which two statements about the implementation are true?”

1. Scooby says:

   November 26, 2015 at 11:57 pm

   Previous implementations of Cisco IOS Multilink PPP (MLP) include support for Link
   Fragmentation Interleaving (LFI). This feature allows the delivery of delay-sensitive packets, such
   as the packets of a Voice call, to be expedited by omitting the PPP Multilink Protocol header and
   sending the packets as raw PPP packets in between the fragments of larger data packets. This
   feature works well on bundles consisting of a single link. However, when the bundle contains
   multiple links there is no way to keep the interleaved packets in sequence with respect to each
   other.
   The Multiclass Multilink PPP (MCMP) feature in Cisco IOS Release 12.2(13)T addresses the
   limitations of MLP LFI on bundles containing multiple links by introducing multiple data classes.
   With multiclass multilink PPP interleaving, large packets can be multilink-encapsulated and
   fragmented into smaller packets to satisfy the delay requirements of real-time voice traffic; small
   real-time packets, which are not multilink encapsulated, are transmitted between fragments of the
   large packets. The interleaving feature also provides a special transmit queue for the smaller,
   delay-sensitive packets, enabling them to be transmitted earlier than other flows. Interleaving
   provides the delay bounds for delay-sensitive voice packets on a slow link that is used for other
   best-effort traffic.
   References:
   http://www.cisco.com/c/en/us/td/docs/ios/dial/configuration/guide/12_4t/dia_12_4t_book/dia_multic
   lass_link_ppp.pdf
   http://www.cisco.com/c/en/us/td/docs/routers/access/500/520/software/configuration/guide/520_S
   CG_Book/520scg_concepts.html

   
   
   
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2. Tim says:

   March 1, 2018 at 5:35 am

   Thanks Scooby!

   
   
   
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