Hello Editors, Working-Group Members, Please see my email below, could someone kindly clarify whether the RT-8 MRT timer value must be sent with the delta included and whether the initiating PE should be running a longer timer than the PEs (of the same ES) that receive the Route-Type 8 message ?
Thank you kindly. Best Regards, Menachem Dodge From: Menachem Dodge <[email protected]> Date: Wednesday, 26 August 2026 at 0:04 To: [email protected] <[email protected]> Cc: BESS <[email protected]> Subject: [bess] RFC 9251 - IGMP and MLD Proxies for EVPN: Maximum Response Time Clarification CAUTION: External E-Mail - Use caution with links and attachments Hello, Please could you clarify the expected behavior for the Maximum Response Time as defined in RFC 9251. There seems to be a difference between the definition of the Maximum Response Time in section 6.2 and section 9.3.1: Section 6.2 1. It computes the Maximum Response Time, which is the duration of the (x,G) leave group synchronization procedure. This is the product of two locally configured values, Last Member Query Count and Last Member Query Interval (described in Section 3 of [RFC2236]), plus a delta corresponding to the time it takes for a BGP advertisement to propagate between the PEs attached to the multihomed ES (delta is a consistently configured value on all PEs attached to the multihomed ES). 4. It advertises an IGMP Leave Synch route for that (ES,BD). … It also contains the maximum response time. Section 9.3.1 Section 9.3.1 Constructing the Multicast Leave Synch Route defines the Maximum Response Time as: "The Maximum Response Time is the value to be used while sending a query, as defined in [RFC2236]. “ RFC 2236 section 2.2 defines Max Response Time “The maximum allowed time before sending a responding report in units of 1/10 second” I am just wondering whether the Maximum Response Time sent in the Multicast Leave Synch Route should contain the additional delta or not? Should the initiating PE be running a longer timer than the PEs that receive the Route-Type 8 message ? Thank you kindly. Best Regards, Menachem Dodge
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