Re: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard

"Satya Mohanty (satyamoh)" <> Fri, 07 December 2018 17:09 UTC

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From: "Satya Mohanty (satyamoh)" <>
To: Anoop Ghanwani <>, "" <>
Thread-Topic: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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Subject: Re: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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Hi Anoop,

Thank you very much for your editorial comments and review.
We will take care of it.


On 12/7/18, 1:01 AM, "BESS on behalf of Anoop Ghanwani" < on behalf of> wrote:

    I have reviewed the doc and I have mostly editorial comments.
    VLAN Bundle, VLAN bundle, VLAN-Bundle, VLAN-bundle -- make consistent
    VLAN Aware Bundle, VLAN-aware bundle, VLAN-Aware Bundle -- make consistent
    bridge table, Bridge Table -- make consistent (also add definition to
    terminology section)
    DF election, DF Election -- make consistent
    Default DF Election, default DF Election -- make consistent
    non-DF -> NDF
    Section 1
    double Q-in-Q tags -> Q-in-Q tags
    double is redundant
    Section 2.1
    Fig 1 is a bit confusing.  If the idea of the rectangle is to show a
    core, then why have connections between PE1 and PE2, PE3, but not
    between PE1 and PE4?
    Layer-2 devices are particularly susceptible to forwarding loops
    because of the broadcast nature of the Ethernet traffic.
    The effect of forwarding loops in a Layer-2 network is particularly
    severe because of the broadcast nature of Ethernet traffic and the
    lack of a TTL.
    Section 2.2.1
    a v4 or v6 peering -> an IPv4 or IPv6 peering
    >From a forwarding perspective, this is
    a churn, as it results in re-programming the PE ports as either
    blocking or non-blocking at potentially all PEs when the DF changes.
    Why would the reprogramming change at all PEs?  It should change for
    at most 2 PEs for each (ES,EVI) being reprogrammed.  Maybe authors
    were trying to convey something else?
    Section 2.3
    DF Election procedure Generally
    Missing a period.
    Section 3
    specification in EVPN -> EVPN specification
    Section 3.1
    DF WAIT, DF_WAIT -- make consistent
    DF Wait timer -- where is this defined?
    Ethernet Segment Route -> Ethernet Segment route
    stop DF timer ->  stop DF wait timer (?)
    start DF timer -> start DF wait timer (?)
    Section 4
    rather than the state of the server states -> rather than the state of
    the server (?)
    Section 4.2
    Si is the IP address of server i -> Si is the IP address of PE i
    operator chooses so -> operator so chooses
    Note 0 <= i,j <= Number of PEs -- should this be "< Number of PEs"?
    Weight(V, Es, Sk) -> Weight(v, Es, Sk)
    Pseudo-random -> pseudo-random
    efficient deterministic -> efficient and deterministic
    V4 -> IPv4
    V6 -> IPv6
    BESS mailing list