Networking Working Group Ran. Chen
Internet-Draft Greg. Mirsky
Intended status: Standards Track Shaofu. Peng
Expires: August 30, 2019 ZTE Corporation
February 26, 2019
BIER-TE Ping and Trace
draft-chen-bier-te-ping-04
Abstract
Bit Index Explicit Replication (BIER)-TE shares architecture and
packet formats with BIER-TE forwards and replicates packets based on
a BitString in the packet header, but every BitPosition of the
BitString of a BIER-TE packet indicates one or more adjacencies.
This document describes the mechanism and basic BIER-TE OAM packet
format that can be used to perform Ping and Traceroute on the BIER-TE
network.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 30, 2019.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
Chen, et al. Expires August 30, 2019 [Page 1]
Internet-Draft BIER-TE Ping and Trace February 2019
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions used in this document . . . . . . . . . . . . . . 3
3. BIER-TE OAM Packet format . . . . . . . . . . . . . . . . . . 3
3.1. Target FEC Stack . . . . . . . . . . . . . . . . . . . . 3
3.1.1. BIER-TE forward-connected TLV . . . . . . . . . . . . 4
3.1.2. BIER-TE local-decap sub-TLV . . . . . . . . . . . . . 5
3.1.3. BIER-TE forward-routed TLV . . . . . . . . . . . . . 6
3.2. Downstream Mapping TLV . . . . . . . . . . . . . . . . . 6
3.2.1. FEC Stack Change Sub-TLV . . . . . . . . . . . . . . 6
3.3. Reply-To TLV . . . . . . . . . . . . . . . . . . . . . . 7
4. BIER-TE OAM Processing . . . . . . . . . . . . . . . . . . . 8
4.1. Sending BIER Echo Request . . . . . . . . . . . . . . . . 8
4.2. Receiving BIER Echo Request . . . . . . . . . . . . . . . 9
4.3. Sending Echo Reply . . . . . . . . . . . . . . . . . . . 10
4.4. Receiving Echo Reply . . . . . . . . . . . . . . . . . . 11
5. Security Considerations . . . . . . . . . . . . . . . . . . . 11
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
6.1. TLVs . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2. Target FEC Stack . . . . . . . . . . . . . . . . . . . . 12
6.3. Downstream Detailed Mapping Sub-TLVs . . . . . . . . . . 12
7. Normative references . . . . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 14
1. Introduction
[I-D.ietf-bier-te-arch] introduces and explains BIER-TE architecture
that provides policy-based multicast forwarding through a "BIER-TE
domain" without requiring intermediate routers to maintain any
multicast related per-flow state. BIER-TE forwards and replicates
packets based on a BitString in the packet header, but every
BitPosition of the BitString of a BIER-TE packet indicates one or
more adjacencies.
This document describes the mechanism and the basic BIER-TE OAM
packet format that can be used to perform Ping and Traceroute on the
BIER-TE network.
This document enhances the BIER Ping and Traceroute, as defined in
[I-D.ietf-bier-ping]. [RFC8296] defines a 4-bit field as "Proto" to
identify the payload following BIER header. When the payload is
Chen, et al. Expires August 30, 2019 [Page 2]
Internet-Draft BIER-TE Ping and Trace February 2019
BIER-TE OAM, the "Proto" field is the same with the BIER OAM "Proto"
field.
2. Conventions used in this document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC2119.
3. BIER-TE OAM Packet format
The BIER-TE OAM packet header format and the fields are the same as
the BIER OAM header [I-D.ietf-bier-ping]. This document defines two
new return codes and the new TLVs and Sub-TLVs.
The new Return codes are follows:
TBA1 Replying BFR is not in the path to any target BFER
TBA2 Mapping for this FEC is not the given BitPosition in BitString
The TLVs and Sub-TLVs requested by this document for IANA
consideration are the following:
Type value field
-------- ---------------------------------
9 Target FEC Stack
10 Reply-To TLV
3.1. Target FEC Stack
A BIER-TE echo request MAY include the Target FEC Stack TLV that
describes the FEC Stack being tested. If there aren't adjacency
keyword information in BFIR, the FEC Stack MUST not be tested, and
the Nil FEC MUST be used.
We define three new FEC Stack types. The Target FEC Stack is a list
of sub-TLVs.
Sub-Type Length Value Field
-------- -------- -------------------------------
29 20 or 48 octets BIER-TE forward-connected
30 8 or 10 octets BIER-TE local-decap
31 4 or 6 octets BIER-TE forward-routed
Chen, et al. Expires August 30, 2019 [Page 3]
Internet-Draft BIER-TE Ping and Trace February 2019
Other FEC Types will be defined as needed.
3.1.1. BIER-TE forward-connected TLV
The format is as below:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Protocol | Address Type | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Local Interface ID (4 or 16 octets) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Remote Interface ID (4 or 16 octets) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
~ ~
| Advertising Node Identifier (4 or 6 octets) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
~ ~
| Receiving Node Identifier (4 or 6 octets) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Address Type
The Address Type indicates the address type and length of the IP
address for the downstream interface. The Address type MAY be set to
one of the values listed in Table below:
Type Addr. Type DA Length DIA Length
-------- -------------- -------------- -----------------
1 IPv4 Numbered 4 4
2 IPv4 Unnumbered 4 4
3 IPv6 Numbered 16 16
4 IPv6 Unnumbered 16 4
DA Length - Downstream Address field Length.
DIA Length - Downstream Interface Address field Length.
Local Interface ID
Local BFR assigns Local Interface ID for a link to which Adjacency ID
is bound. This field is set to local link address (IPv4 or IPv6).
Chen, et al. Expires August 30, 2019 [Page 4]
Internet-Draft BIER-TE Ping and Trace February 2019
Remote Interface ID
Remote BFR assigns Remote Interface ID for a link to which Adjacency
ID is bound. This field is set to remote link address (IPv4 or
IPv6).
Advertising Node Identifier
Advertising Node Identifier is the advertising node identifier. When
Protocol is set to 1, then the 32 rightmost bits represent OSPF
Router ID, and if Protocol is set to 2, this field carries 48 bit
ISIS System ID.
Receiving Node Identifier
Receiving Node Identifier is the downstream node identifier. When
Protocol is set to 1, then the 32 rightmost bits represent OSPF
Router ID, and if Protocol is set to 2, this field carries 48 bit
ISIS System ID.
3.1.2. BIER-TE local-decap sub-TLV
The format is as below:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Protocol | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
~ ~
| Advertising Node Identifier (4 or 6 octets) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Advertising Node Identifier
Advertising Node Identifier is the advertising node identifier. When
Protocol is set to 1, then the 32 rightmost bits represent OSPF
Router ID and if protocol is set to 2, this field carries 48 bit ISIS
System ID.
Chen, et al. Expires August 30, 2019 [Page 5]
Internet-Draft BIER-TE Ping and Trace February 2019
3.1.3. BIER-TE forward-routed TLV
The ipv4 format is as below:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | BFR IPv4 Prefix | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
IPv4 Prefix:This field carries the IPv4 prefix.
The ipv6 format is as below:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| BFR IPv6 Prefix |
| |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
IPv6 Prefix:This field carries the IPv6 prefix.
3.2. Downstream Mapping TLV
This TLV format is the same with the BIER OAM [I-D.ietf-bier-ping]
and we a new Sub-TLV: FEC stack change Sub-TLV.
Sub-TLV Type Value
--------------- ------------------------
3 FEC stack change
3.2.1. FEC Stack Change Sub-TLV
The format and the usage as defined in [RFC6424].
Chen, et al. Expires August 30, 2019 [Page 6]
Internet-Draft BIER-TE Ping and Trace February 2019
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Operation Type | Address Type | FEC-tlv length| Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Remote Peer Address (0, 4 or 16 octets) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. FEC TLV .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Operation Type
The operation type specifies the action associated with the FEC Stack
Change. A new operation type is defined:
Type Operation
----- -----------
3 Remove
Address type: 0.
FEC TLV Length: Length in bytes of the FEC TLV.
Reserved: This field is reserved for future use and MUST be set to
zero.
Remote Peer Address: 0.
FEC TLV
The FEC TLV is present only when the FEC-tlv length field is nonzero.
The FEC TLV specifies the FEC associated with the FEC stack change
operation. The FEC type is defined in section 3.1.
3.3. Reply-To TLV
The Initiator BFR MAY include the Reply-To TLV in Echo Request
message. The Reply-to TLV is used by a transit BFR or BFER when the
reply mode is "Reply via IPv4/IPv6 UDP packet".
The IP address will be used as the destination IP address for the
Echo Reply. The format and usage are the same as defined for the
BIER OAM header [I-D.ietf-bier-ping].
Chen, et al. Expires August 30, 2019 [Page 7]
Internet-Draft BIER-TE Ping and Trace February 2019
4. BIER-TE OAM Processing
BIER-TE OAM packet MUST be sent to BIER control plane for OAM
processing if one of the following conditions is true:
o The receiving BFR is a BFER.
o TTL of BIER-MPLS Label expired.
o Presence of Router Alert label in the label stack.
4.1. Sending BIER Echo Request
o Message Type:1.
o Return Code:0.
o Proto:0.
o Sender's Handle and Sequence number:The local matter to Initiator
and SHOULD increment the Sequence number by 1 for every subsequent
Echo Request.
o QTF:Initiator's local timestamp format.
o TimeStamp Sent:the time that the Echo Request is sent.
o MUST include Original SI-BitString TLV.
o In Ping mode, the Initiator MAY include Target SI-BitString TLV to
control the responding BFER(s) by listing all local-decap
Adjacency ID of the BFERs from which the Initiator expects a
response. Initiator on receiving a reply with Return code as
"Replying BFR is the only BFER in header Bitstring" or "Replying
router is one of the BFER in header Bitstring", SHOULD remove the
BFER's local-decap ID from Target SI-BitString for any subsequent
Echo Request.
o When the Reply mode is set to 2, Initiator MUST include Reply-To
TLV in the Echo Request.
o The Initiator MAY include Downstream Mapping TLV in the Echo
Request to query additional information from transit BFRs and
BFERs. In the case of ECMP discovery, Initiator MUST include the
Multipath Entropy Data Sub-TLV and SHOULD set the Target SI-
BitString TLV carrying a specific BFER's local-decap Adjacency ID.
Chen, et al. Expires August 30, 2019 [Page 8]
Internet-Draft BIER-TE Ping and Trace February 2019
o The Initiator MUST encapsulate the OAM packet with BIER header and
MUST set the Proto as 6 and further encapsulates with BIER-MPLS
label. In ping mode, the BIER-MPLS Label TTL MUST be set to 255.
In traceroute mode, the BIER-MPLS Label TTL is set successively
starting from 1 and MUST stop sending the Echo Request if it
receives a reply with Return code as "Replying router is the only
BFER in BIER header Bitstring" from all BFER listed in Target SI-
BitString TLV.
o MUST PUSH the corresponding FEC to Target FEC stack, in the same
with as the order of the adjacency's bit-position in the
BitString.
4.2. Receiving BIER Echo Request
Reply-Flag:This flag is initially set to 1.
Interface-I:The incoming interface on which the Echo Request was
received.
BIER-Label-L:The BIER-MPLS Label received as the top label on
received Echo Request.
Header-H:The BIER header from the received Echo Request.
Best-return-code: contains the return code for the echo reply packet
as currently best known.
If the received Echo Request carries Target SI-BitString TLV, a BFR
SHOULD run boolean AND operation between BitString in Header-H and
BitString in Target SI-BitString TLV.
If the resulting BitString is all-zero, Set Best-return-code to
"Mapping for this FEC is not the given BitPosition in BitString" and
Go to section 4.3, Else:
o If the BIER-Label-L does not correspond to the local label
assigned for {sub-domain, BitStringLen, SI} in Original
SIBitString TLV, Set the Best-return-code to "Set-Identifier
Mismatch" and Go to section 4.3.
o If any of the TLVs in Echo Request message is not understood. Set
the Best-return-code to "One or more of the TLVs was not
understood" and Go to section 4.3.
o If the forwarding lookup defined in section 6.5 of RFC8279 does
not match any entry for the received BitString in BIER header.
Chen, et al. Expires August 30, 2019 [Page 9]
Internet-Draft BIER-TE Ping and Trace February 2019
Set the Best-return-code to "No matching entry in forwarding
table" and Go to section 4.3.
o If any FEC which get from the matched BIFT entry is not consistent
with the FEC get from the FEC stack at the same position as
entry's BitPosition in Header-H, Set the Best-return-code to
"Mapping for this FEC is not the given BitPosition in BitString"
and Go to section 4.3.
o If the DSMAP TLV carries Multipath Entropy Data Sub-TLV and if the
BitString in Header-H carries more than one forward routed
adjacency and each matches the BIFT entry. Set the Best-return-
code to "Invalid Multipath Info Request" and Go to section 4.3.
Else, list the ECMP downstream neighbors to reach forward routed
adjacency, calculate the Entropy considering the BitString in
Header-H and Multipath Entropy Data Sub-TLV from received Echo
Request. Set the Best-return-code to 5 (Packet-Forward-Success).
o For all the forward-connected adjacencies and all the local-decap
adjacencies which match the BIFT entry, FEC Change sub-TLV SHOULD
be carried in DSMAP TLV and set the operation type filed in the
FEC change sub-TLV to remove.
o For all the forward-routed adjacencies which match the BIFT entry,
if the BIFT entry indicates that not the local decapsulation but
continue forwarding the OAM packet, FEC change sub-TLV SHOULD NOT
be carried in DSMAP TLV. If the BIFT entry indicate that the
local decapsulation the OAM packet, FEC change sub-TLV SHOULD be
carried in DSMAP TLV, and set the operation type filed in the FEC
change sub-TLV to remove.
o If the responder is BFER which matches the local-decap BIFT, and
there are no more bits in BIER header BitString left for
forwarding.Set the Best-return-code to "Replying router is the
only BFER in BIER header BitString", and go to section 4.3.
o If the responder is BFER which match the local-decap BIFT, and
there are more bits in the BitString left for forwarding. Set the
Best-return-code to " Replying router is one of the BFER in BIER
header BitString", and go to section 4.3.
4.3. Sending Echo Reply
o Message Type:2.
o Return Code:Best-return-code.
o The Proto :0.
Chen, et al. Expires August 30, 2019 [Page 10]
Internet-Draft BIER-TE Ping and Trace February 2019
o When the Best-return-code is "Replying BFR is one of the BFER in
header BitString", it MUST include Responder BFER TLV.
o If the received Echo Request had DSMAP with Multipath Entropy Data
Sub-TLV, Responder BFR MUST include DSMAP for each outgoing
interface over which the packet will be replicated and include the
respective Multipath Entropy Data Sub-TLV.
o If the received Echo Request had DSMAP without Multipath Entropy
Data Sub-TLV, Responder BFR MUST include DSMAP for each outgoing
interface over which the packet will be replicated.
o When the Best-return-code is "Replying BFR is the only BFER in
header BitString", it MUST include Responder BFER TLV.
o When the Reply mode in received Echo Request is set to " Reply via
BIER packet", Responder appends BIER header listing the BitString
with the BFIR's local-decap id and set the Proto to "OAM" and set
the BFIR value to 0.
o When the Reply mode in received Echo Request is set to "Reply via
IPv4/IPv6 UDP packet", Responder encapsulates with IP/UDP header.
The UDP destination port MUST be set to TBD1 and source port MAY
be randomly selected from the dynamic range of port numbers. The
source IP is any local address of the responder and destination IP
is derived from Reply-To TLV.
4.4. Receiving Echo Reply
o Initiator on receiving Echo Reply will use the Sender's Handle to
match with Echo Request sent. If no match is found, Initiator
MUST ignore the Echo Reply.
o If receiving Echo Reply have Downstream Mapping, Initiator SHOULD
copy the same to subsequent Echo Request(s).
o If one of the Echo Reply is received with Return Code as "Replying
BFR is one of the BFER in header BitString", it SHOULD remove the
BFER's local-decap ID from Target SI-BitString for any subsequent
Echo Request.
5. Security Considerations
TBD.
Chen, et al. Expires August 30, 2019 [Page 11]
Internet-Draft BIER-TE Ping and Trace February 2019
6. IANA Considerations
This document request UDP port TBD1 to be allocated by IANA for BIER-
TE Echo.
This document request the IANA for creation and management of below
registries and sub-registries:
Return codes defined in this document are the following:
Value value Meaning
----- --------------------------------------------------
10 Replying BFR is not in the path to any target BFER
11 Mapping for this FEC is not the given BitPosition in BitString
6.1. TLVs
The TLVs and Sub-TLVs requested by this document for IANA
consideration are the following:
6.2. Target FEC Stack
Sub-Type Value Field
---------- ----------------------------
29 BIER-TE forward-connected
30 BIER-TE local-decap
31 BIER-TE forward-routed
6.3. Downstream Detailed Mapping Sub-TLVs
This section defines the optional Sub-TLVs that can be included in
Downstream Mapping TLV.
Sub-TLV Type Value
---------- ----------------------------
3 FEC stack change
7. Normative references
[I-D.ietf-bier-ping]
Kumar, N., Pignataro, C., Akiya, N., Zheng, L., Chen, M.,
and G. Mirsky, "BIER Ping and Trace", draft-ietf-bier-
ping-04 (work in progress), October 2018.
Chen, et al. Expires August 30, 2019 [Page 12]
Internet-Draft BIER-TE Ping and Trace February 2019
[I-D.ietf-bier-te-arch]
Eckert, T., Cauchie, G., Braun, W., and M. Menth, "Traffic
Engineering for Bit Index Explicit Replication (BIER-TE)",
draft-ietf-bier-te-arch-01 (work in progress), October
2018.
[RFC0792] Postel, J., "Internet Control Message Protocol", STD 5,
RFC 792, DOI 10.17487/RFC0792, September 1981,
<https://www.rfc-editor.org/info/rfc792>.
[RFC4379] Kompella, K. and G. Swallow, "Detecting Multi-Protocol
Label Switched (MPLS) Data Plane Failures", RFC 4379,
DOI 10.17487/RFC4379, February 2006,
<https://www.rfc-editor.org/info/rfc4379>.
[RFC5905] Mills, D., Martin, J., Ed., Burbank, J., and W. Kasch,
"Network Time Protocol Version 4: Protocol and Algorithms
Specification", RFC 5905, DOI 10.17487/RFC5905, June 2010,
<https://www.rfc-editor.org/info/rfc5905>.
[RFC6424] Bahadur, N., Kompella, K., and G. Swallow, "Mechanism for
Performing Label Switched Path Ping (LSP Ping) over MPLS
Tunnels", RFC 6424, DOI 10.17487/RFC6424, November 2011,
<https://www.rfc-editor.org/info/rfc6424>.
[RFC8279] Wijnands, IJ., Ed., Rosen, E., Ed., Dolganow, A.,
Przygienda, T., and S. Aldrin, "Multicast Using Bit Index
Explicit Replication (BIER)", RFC 8279,
DOI 10.17487/RFC8279, November 2017,
<https://www.rfc-editor.org/info/rfc8279>.
[RFC8296] Wijnands, IJ., Ed., Rosen, E., Ed., Dolganow, A.,
Tantsura, J., Aldrin, S., and I. Meilik, "Encapsulation
for Bit Index Explicit Replication (BIER) in MPLS and Non-
MPLS Networks", RFC 8296, DOI 10.17487/RFC8296, January
2018, <https://www.rfc-editor.org/info/rfc8296>.
[RFC8401] Ginsberg, L., Ed., Przygienda, T., Aldrin, S., and Z.
Zhang, "Bit Index Explicit Replication (BIER) Support via
IS-IS", RFC 8401, DOI 10.17487/RFC8401, June 2018,
<https://www.rfc-editor.org/info/rfc8401>.
[RFC8444] Psenak, P., Ed., Kumar, N., Wijnands, IJ., Dolganow, A.,
Przygienda, T., Zhang, J., and S. Aldrin, "OSPFv2
Extensions for Bit Index Explicit Replication (BIER)",
RFC 8444, DOI 10.17487/RFC8444, November 2018,
<https://www.rfc-editor.org/info/rfc8444>.
Chen, et al. Expires August 30, 2019 [Page 13]
Internet-Draft BIER-TE Ping and Trace February 2019
Authors' Addresses
Ran Chen
ZTE Corporation
Email: chen.ran@zte.com.cn
Greg Mirsky
ZTE Corporation
Email: gregimirsky@gmail.com
Shaofu Peng
ZTE Corporation
Email: peng.shaofu@zte.com.cn
Chen, et al. Expires August 30, 2019 [Page 14]