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350-401 · Question #244

What is the function of an EIGRP sequence TLV packet?

The correct answer is C. to list the peers that should not listen to the next multicast packet during the reliable multicast. An EIGRP sequence TLV packet is used in EIGRP's Reliable Transport Protocol (RTP) to identify neighbors that should not process or acknowledge a particular multicast update packet.

Submitted by mateo_ar· Mar 6, 2026Infrastructure

Question

What is the function of an EIGRP sequence TLV packet?

Options

  • Ato acknowledge a set of sequence numbers during the startup update process
  • Bto list the peers that should listen to the next multicast packet during the reliable multicast process
  • Cto list the peers that should not listen to the next multicast packet during the reliable multicast
  • Dto define the initial sequence number when bringing up a new peer

How the community answered

(48 responses)
  • A
    2% (1)
  • B
    2% (1)
  • C
    88% (42)
  • D
    8% (4)

Why each option

An EIGRP sequence TLV packet is used in EIGRP's Reliable Transport Protocol (RTP) to identify neighbors that should not process or acknowledge a particular multicast update packet.

Ato acknowledge a set of sequence numbers during the startup update process

Acknowledgment of sequence numbers in EIGRP is primarily handled by ACK packets, not by sequence TLV packets, which serve to exclude specific neighbors from processing a multicast.

Bto list the peers that should listen to the next multicast packet during the reliable multicast process

Sequence TLVs specify which peers should *not* listen to the next multicast packet, not which ones should; they function as an exclusion list.

Cto list the peers that should not listen to the next multicast packet during the reliable multicastCorrect

EIGRP uses sequence TLV packets in its reliable multicast process to explicitly list peers that are excluded from listening to (and thus not acknowledging) the subsequent multicast packet, optimizing selective reliable delivery.

Dto define the initial sequence number when bringing up a new peer

The initial sequence number for a new peer is typically exchanged during the EIGRP neighbor establishment process, which involves Hello and Update packets, not specifically a sequence TLV packet.

Concept tested: EIGRP Reliable Multicast and Sequence TLV function

Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-enhanced-int-gateway-rtg-prot.html

Topics

#EIGRP sequence TLV#EIGRP reliable multicast#EIGRP packet types

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