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Which segment protocol provides fast and predictable convergence (typically within 50 ms) in Layer 2 Ethernet

Which segment protocol provides fast and predictable convergence (typically within 50 ms) in
Layer 2 Ethernet ring topologies?

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A.
Spanning Tree Protocol

B.
Flex Links

C.
Resilient Ethernet Protocol

D.
Spatial Reuse Protocol

E.
Resilient Packet Ring

Explanation:
http://www.cisco.com/en/US/docs/switches/metro/me3400/software/release/12.2_40_se/configurat
ion/guide/swrep.html
Resilient Ethernet Protocol (REP) on the Cisco ME 3400E Ethernet Access switch. REP is a Cisco
proprietary protocol that provides an alternative to Spanning Tree Protocol (STP) to control

network loops, handle link failures, and improve convergence time. REP controls a group of ports
connected in a segment, ensures that the segment does not create any bridging loops, and
responds to link failures within the segment. REP provides a basis for constructing more complex
networks and supports VLAN load balancing.

2 Comments on “Which segment protocol provides fast and predictable convergence (typically within 50 ms) in Layer 2 Ethernet ”

  1. jslaven says:

    Resilient Ethernet Protocol (REP)
    Supported Platforms
    Desktop Switching Business Unit (DSBU) Metro Switches (3750ME and ME3400) Release 12.2(40)SE and later
    Cisco Catalyst 4500 Series Switch Release 12.2(44)SG and later
    Cisco Catalyst 6500 Series Switch Starting in Whitney2 (12.2SXI)
    Cisco Catalyst 7600 Series Router Starting in Cobra (12.2SRC)

    Here are some of the benefits of REP:

    REP offers these convergence times:
    3750ME converges between 20ms and 79ms
    ME3400 converges between 40ms and 70ms

    http://www.cisco.com/c/en/us/support/docs/lan-switching/ethernet/116384-technote-rep-00.html




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