Introduction
http://www.ieee802.org/1/files/public/docs2010/liaison-nfinn-split-horizon-vid-filtering-0710v04.pdf describes in pages 19 and 20 the “Optimal distribution of data: Non-802.1aq” and
“Using VIDs for manually configured optimum data distribution”
The following slides expand the description in those two pages with
 Multi (e.g. 2) domain E-LAN example
 1 root and 2 roots E-Tree examples
 Internal node configuration details for E-LAN and E-Tree cases, including






Relay VIDs and switch configurations
Egress filtering
Egress and ingress VID translation,
Per domain local VID values
Per link local VID values (used in transport networks)
Primary VID values in MEPs and MIPs
v02 adds some E-Tree cases, corrections of some mistakes in v01, an evaluation
of UP and Down MEP/MIP primary VID values and support of those multi-VID
models in G.8021
v03 includes some corrections in the B1 and B2 node expansion figures on slides
5,17,20,26.
1
C11
E-LAN (1 domain)
V
Configuration of ‘I’ and ‘V’ relayVIDs, local VIDs, egress filtering
and VID translation
P11
C12
V
B1
P10
P13
P12
I
P31
I
C2
V
P20
P21
P23
B2
P32
B3
P30
V
C3
I
C11
I V
V
V
V,I
V I
2
V,I
VI
VID
Translation at
egress port
P10
V
V
V
I
I
V
B2
B1
I
V
VI
V
V
B3
V,I
I V
V
SVL
I
C3
VI
C2
V
P11
V,I
B1
I V
C12
VI
V
VI
VLAN has common local VID
value ‘I’ on the inner links B1B2, B2-B3 and B3-B1
Internal configuration of node
B1 with the E-LAN FID including
the ‘I’ and ‘V’ relay-VID learning
and forwarding processes and
VID translation at the egress
ports
V
VLAN has 2 relay-VID
values ‘I’ and ‘V’ which
operate in SVL mode
P12
I
P13
I
X: Local VID
X: Relay-VID
XY, Y X: relay-VID X to local-VID Y Translation at egress port
SVL: Shared VLAN Learning
E-LAN (2 domains)
C11
Extension of previous
example with a 2nd domain
with edge nodes B2-B4-B5
P11
C12
B1
P10
P13
P12
P40
P42
P45
B4
P30
C3
VLAN has two domains
with a full mesh of links
P25
P52
P54
 VLAN with two domains
interconnected by node B2
Next slide illustrates
B5
P55
P50
C51
3
B3
B2
P24
C4
P32
P21
P23
P20
C2
P31
C52
 Need for two inner domain
VIDs (Ia, Ib) in this case
 Relay-VIDs registered at
each output port
 VID translation at egress
ports
 VID values used on the links
between the nodes
 Detailed architecture in node
B2 (FID with 3 relay-VIDs,
SVL, VID Translation)
E-LAN (2 domains)
C11
VLAN has common local VID
value ‘Ia’ on the inner links B1B2, B2-B3 and B3-B1
I V
V
VIa
C12
B1
V,Ia
V,IbIa
IaV
V
V
C2
V,Ia,Ib
VIa,Ib
V,I
VLAN in Node B2 has 3 relayVID values ‘Ia’, ‘Ib’ and ‘V’ which
operate in SVL mode
V
Ia
V
V
Ia
V
V,Ib
B3
V,Ia
IaV
V
C3
Ia
V,Ib
Ia
P21
B2
Ib
VLAN has common local VID
value ‘Ib’ on the inner links B2B4, B4-B5 and B5-B2
Ib
Ia V
Ia Ib
V,Ia
V,Ia
SVL
P20
V
V
C4
V V,Ib
Ib
V
V
V,Ib
B4
B5
VIb
VIb IbV
IbV
C52
V Ib
P23
Ia
Ib
IbV
V,Ib
V
Ia
V
V Ia
V
B2
V
C51
VID Translation
at egress port
P24
Ib
P25
4
Ib
X: Local VID
X: Relay-VID
XY, Y X: relay-VID X to local-VID Y Translation at egress port
SVL: Shared VLAN Learning
E-LAN (1 domain)
C11
P11
C12
P10
B1
P13
P12
Q
P31
P
P20
C2
P21
P23
B2
P32
B3
P30
C3
R
VID translation at the
ingress ports in the domain
enables the usage of
different local VID values on
each of the inner domain
links. A requirement in
transport networks.
V
VLAN has different local VID values
‘P’, ‘Q’ and ‘R’ on the inner links B1B2, B2-B3 and B3-B1
C11
P11
VI
I V
V
VI
V
V,I
5
V
V,I
VI
V
V
V
Q
P
V
B2
R
V
V
B3
V,I
I V
V
V
VI
SVL
I
C3
VR
I R
C2
P10
V,I
B1
IP PI
VP PV
C12
B1
V
VID Translation
at ingress port
X: local VID
XY, Y X: local-VID Y to relay-VID X Translation at ingress port
X: Relay-VID
XY, Y X: relay-VID X to local-VID Y Translation at egress port
P12
Q
P13
P
SVL: Shared VLAN Learning
VLAN has different local VID values
‘P’, ‘Q’ and ‘R’ on the inner links B1B2, B1-B3 and B3-B2
C11
VID translation at the ingress ports in the
domain enables the usage of different
local VID values on each of the inner
domain links in both domains. A
requirement in transport networks.
I V
V
VI
C12
V
PI
PV
IaP
V,IbP
V
C2
V,I
B1
V,I
V
V
Q
V
B3
V,I
I V
V
C3
R
V,Ib
V,Ia,Ib
VIa,Ib
V
P
V,Ib
E-LAN (2 domains)
P
P21
B2
L
C4
V V,I
VI
B4
V,I
IV
R
V
V Ia
V
V
C52
V Ib
P23
Ia
Ib
IV
M V
V
VM MV B5
IM MI
V,I
B2
SVL
P20
V
V
PV
K
P Ia
P Ib
VLAN has different local VID values
‘K’, ‘L’ and ‘M’ on the inner links B2B4, B2-B5 and B5-B4
V,Ia
V,Ia
P24
V
C51
6
X: Local VID
X: Relay-VID
VID Translation
at ingress port
XY, Y X: local-VID Y to relay-VID X Translation at ingress port
XY, Y X: relay-VID X to local-VID Y Translation at egress port
K
P25
L
SVL: Shared VLAN Learning
Security in transport networks
In the previous E-LAN examples ingress VID Translation is not
deployed at all input ports (e.g. not on P20)
With the “Ingress Filtering” parameter set to ‘disabled’ those
VLAN connections are not secured; frames arriving on other
input ports of e.g. node B4 with a local VID value ‘V’ can enter
the E-LAN VLAN
This security issue is resolved when ingress VID translation is
deployed at every input port
This prevents that frames with unexpected local VID values
can access the port and intrude the VLANs
7
VID Translation for E-LAN (2 domains) example
When using different VID values
on the links between nodes it is
required to identify the ports
which form a group and ports
which are individual
C11
VID: G
C12
VID: A
P11
B1
P10
P13
P12
VID: Q
P31
VID: P
C2
VID: B
P21
P23
P20
P32
B3
VID: R
P30
VID:
F
B2
P24 P25
VID: K
C4
P40
VID:
C
P42
P45
B4
VID: L
P52
P54
VID: M
For node B2 the following applies:
B5
P55
P50
VID: D
C51
8
 All individual ports must be
associated with a relay VID (R-VID)
C3
value identifying Individual ports
 Ports which form a group must be
associated with a R-VID value
identifying that group
 Administration of individual ports and
grouped ports is done via the Ingress
VID Translation tables in each port
(see next slide for example)
VID: E
C52
 Group 1: (P21,P23): R-VID: Ia
 Group 2: (P24,P25): R-VID: Ib
 Individual: P20: R-VID: V
For node B5:
 Group 1: (P52,P54): R-VID: I
 Individual: P50,P55: R-VID: V
Using VIDs for manually configured optimum data
distribution for E-LAN (2 domains) example using ingress
VID translation on all ports
Bridge
Port
Can transmit
(before xlate)
(Ingress) VID
Translation
Egress VID
Translation
B2
P20
V, Ia, Ib
BV
IaB, IbB, VB
P21
V, Ib
PIa (Group 1)
IbP, VP
P23
V, Ib
RIa (Group 1)
IbR, VR
P24
V, Ia
KIb (Group 2)
IaK, VK
P25
V, Ia
LIb (Group 2)
IaL, VL
P50
V, I
DV
ID, VD
P52
V
LI (Group 1)
VL
P54
V
MI (Group 1)
VM
P55
V, I
EV
IE, VE
B1
…
…
…
…
B3
…
…
…
…
B4
…
…
…
…
B5
9
Port Group concept in transport networks
The logical concept of a “Port Group” could be maintained in
a transport network as a configuration element in the
manually configured optimum data distribution for E-LAN
connection management
 Each port in a node in such E-LAN is marked as either an Individual
Port or as a port in a Port Group #i (i≥1)
 The ports in a Port Group will see their local VID values translated
into a common relay VID value in the ingress VID translation process
 Relay VID values for the individual and the port group ports have a
node local scope; each node can select those values independent of
other nodes
10
E-Tree
11
E-Tree types
There are four types of E-Tree
 Unidirectional P2MP E-Tree (outside scope of this document)
 Bidirectional RMP E-Tree with single root and individual leaves
 Bidirectional RMP E-Tree with multiple roots and individual leaves
 Bidirectional RMP E-Tree with multiple roots, individual leaves and one or more leaf
groups
The 4th type requires the use of the largest set of relay VID values and local VID
values
 Relay VIDs identify the frame’s source and potential set of destination ports: R, I,
VG1 to VGN
 Local VIDs identify the frame’s source port: root, individual leaf, leaf group #i
The 2nd type requires the use of two relay VID values (R, I) and one local VID value
per link
 Local VID identifies in the frame’s source port: root, individual leaf
 Ingress VID translation converts local VID value to appropriate relay VID value
 Egress VID translation converts both relay VID values to same local VID value
The 3rd type requires the use of two relay VID values (R, I) and one or two local
VID values per link
 Local VID values can not be pruned to single value on the links between the root
ports
12
Next slides illustrate the 2nd, 3rd and 4th E-Tree types and their configuration
details from the viewpoint of a transport network
E-Tree (1 root, no leaf groups)
Ports
R1
G
L1
A
P10
 Root: R1
 Leaf: L1,L2,L3,L4,L51,L52
P11
B1
Q
P13
P12
Local VID values
P31
P
B3
P21
L2
B
P20
P30
L3
F
 A to G, K, L, P, Q
Relay VID values
B2
 I, R
P24 P25
K
P42
L4
P40
C
B4
Single local VID value for
both directions of transport
per link, e.g.
L
B5
E
P55
P50
D
L51
13
 B2-B4 link: K
P52
L52
Possible due to
 usage of ingress and
egress VID translation
 single root
E-Tree (1 root, no leaf groups)
AI
AR
A
L1
RG
R,IG
R1
PI
PR
R
Q
R,I
P
B3
R,I
B
R
BI
BR
F
R
IF
RF
P
L3
B2
R
P20
R
B
K
L4
C
R,I
R
CI
CR
B4
P21
PR
RP
R,IP
R
P I
PR
L2
R,I
B1
R
Graphical representation of
configuration details…
G
B2
SVL
BI
BR
R
L
I
R,I
B5
D
R
ID
RD
R
IE
RE
E
L52
P24
L
K
P25
L51
14
X: Local VID
X: Relay-VID
XY, Y X: local-VID Y to relay-VID X Translation at ingress port
XY, Y X: relay-VID X to local-VID Y Translation at egress port
SVL: Shared VLAN Learning
Using VIDs for manually configured optimum data
distribution for E-Tree (1 root, no leaf groups) example
Bridge
Port
Can transmit
(before xlate)
(Ingress) VID
Translation
Egress VID
Translation
B1
P10
R
AI
RA
P11
R,I
GR
IG, RG
P12
R
PI
RP
P13
R
QI
RQ
P20
R
BI
RB
P21
R,I
PR
IP, RP
P24
R
KI
RK
P25
R
LI
RL
P30
R
FI
RF
P31
R,I
QR
IQ, RQ
P40
R
CI
RC
P42
R,I
KR
IK, RK
P50
R
DI
RD
P52
R,I
LR
IL, RL
P55
R
EI
RE
B2
B3
B4
B5
15
E-Tree (2 roots, no leaf groups)
Ports
 Root: R1, R5
 Leaf: L1,L2,L3,L4,L5
R1
G
L1
A
P11
Local VID values
B1
P10
P
 A to G, K, L, M, P, Q, R
Q
P13
P12
P31
R
B3
P21
L2
B
P20
B2
P42
L4
P40
C
B4
F
1 local VID
value
P24 P25
K
P30
2 local VID
values
L M
P52
B5
P55
P50
D
E
R5
L3
Relay VID values
 I, R
Single local VID value for both
directions of transport for subset
of links with only individual
leaves behind it
 B2-B4 link: K
Two local VID values for other
subset of links with roots plus
individual leaves behind it; i.e.
 B1-B2 link: P, R
 B2-B5 link: L, M
Possible due to
L5
16
 usage of ingress and egress
VID translation
E-Tree (2 roots, no leaf groups)
AI
AR
A
R,I
R
L4
C
R
CI
CR
B4
R,I
P
B3
F
R
IF
RF
P P21
L3
B2
P20
R R,I
K
R,I
Q
R,I
R
BI
BR
R
B
L
M
B5
RE
R,IE
R,I
ID
RD
D
B2
SVL
BI
BR
R
I
R,I
R
R
RR
RR
B
R,I
PI
P I
L2
Graphical representation of
configuration details…
G
B1
R
RR
RR PI
IP PI
IP RR
RR
L1
RG
R,IG
R1
E
R5
M
P24
L
K
L5
17
X: Local VID
X: Relay-VID
XY, Y X: local-VID Y to relay-VID X Translation at ingress port
XY, Y X: relay-VID X to local-VID Y Translation at egress port
SVL: Shared VLAN Learning
P25
Using VIDs for manually configured optimum data
distribution for E-Tree (2 roots, no leaf groups) example
Bridge
Port
Can transmit
(before xlate)
(Ingress) VID
Translation
Egress VID
Translation
B1
P10
R
AI
RA
P11
R,I
GR
IG, RG
P12
R,I
PI, RR
IP, RR
P13
R
QI
RQ
P20
R
BI
RB
P21
R,I
PI, RR
IP, RR
P24
R
KI
RK
P25
R,I
LI, MR
IL, RM
P30
R
FI
RF
P31
R,I
QR
IQ, RQ
P40
R
CI
RC
P42
R,I
KR
IK, RK
P50
R
DI
RD
P52
R,I
LI, MR
IL, RM
P55
R,I
EI
IE, RE
B2
B3
B4
B5
18
E-Tree (2 roots, 1 leaf group)
Ports
R1
G
L1
A
P10
LG13
P11
J
B1
Q
T
P13
P12
P31
B3
P21
B
P20
P24
K
P42
L4
P40
C
B4
H
19
F
2 local VID
values
3 local VID
values
O LM
P52
B5
P55
P50
P41
LG14
P30
L3
 A to H,J, K, L, M, N,O,P,Q,
R,S,T
Relay VID values
B2
P25
N
Local VID values
P33
P RS
L2
 Root: R1, R5
 Leaf: L1,L2,L3,L4,L5
 Leaf group 1: LG14,LG13
D
L5
E
R5
 I, R, VG1
E-Tree (2 roots, 1 leaf group)
AI
AR
A
G
R
R,I,VG1
J
Q
T
R, VG1
R,I,VG1
R,VG1
P RS
KI
KR
NVG1
NVG1
R,I,VG1
C
R
HR
HVG1
HVG1
B4
LG14
20
X: Local VID
X: Relay-VID
O L M
R,I,VG1
R
D
B2
SVL
BI
BR
R
I
B5
R,VG1
H
B
RE
R,I,VG1E
R,I,VG1
ID
RD
CI
CR
P20
R,I,VG1
R,VG1
RR
RR
B2
BI
BR
K N
L4
L3
VG1
R
P P21 R
PI
P I
R,I,VG1
IF
RF
S
VG1
B
B3
F
R
S
S
L2
Graphical representation of
configuration details…
LG13
B1
SVG1
VG1S SVG1
VG1S PI
IP PI
IP RR
RR RR
RR
L1
RG
R,I,VG1G
R1
E
VG1
R5
M
P25
N
L
P24
K
L5
XY, Y X: local-VID Y to relay-VID X Translation at ingress port
XY, Y X: relay-VID X to local-VID Y Translation at egress port
O
SVL: Shared VLAN Learning
Using VIDs for manually configured optimum data
distribution for E-Tree (2 roots, 1 leaf group) example
Bridge
Port
Can transmit
(before xlate)
(Ingress) VID
Translation
Egress VID Translation
B1
P10
R
AI
RA
P11
R,I,VG1
GR
IG, RG, VG1G
P12
R,I,VG1
PI, RR, SVG1
IP, RR, VG1S
P13
R,VG1
QI, TVG1
RQ, VG1T
P20
R
BI
RB
P21
R,I,VG1
PI, RR, SVG1
IP, RR, VG1S
P24
R,VG1
KI, NVG1
RK, VG1N
P25
R,VG1
LI
RL
P30
R
FI
RF
P31
R,I,VG1
QR
IQ, RQ
P33
R,VG1
JVG1
RJ, VG1J
P40
R
CI
RC
P41
R,VG1
DI
RD
P42
R,I,VG1
KR
IK, RK
P50
R
DI
RD
P52
R,I,VG1
LR
IL, RL
P55
R,VG1
ER
IE, RE, VG1E
B2
B3
B4
B5
21
E-LAN/E-Tree in ITU-T models
22
G.8021 E-LAN/E-Tree modelling
802.1Q multi-VID E-LAN/E-Tree models can be 1-to-1 translated into
G.8021 ETH layer model
 Each relay VID reference point is represented by an ETH_FP (Flow Point)
reference point
 The multi relay-VID FID is represented by an “ETH Flow Forwarding (FF)
process in SVL mode” within an ETH Connection function (see clause
9.1.1/G.8021)
MI_FF_ Learning
MI_FF_STP_LearningState[]
Relay-VID ‘I’ learning and
forwarding process
‘I’
ETH_CI
ETH_CI
Set of ETH_FPs
represents EISS
0
0
1
1
2
Learning
2
n
n
0
1
2 Forwarding 2
n
(Address, port)
ETH_TFP
ETH_FP
Relay-VID
reference point
....
ETH/ETH-m
ETH/ETH-m_A_PP
0
ETH_CI
1
2
ETH_AP represents
ISS reference point
ETH_AP
VID Translation relates
local VID with one or
more ETH_FPs
G.8021 ETH to ETH multiplexing adaptation function
Relay-VID ‘R’
learning and
forwarding
process
Address
‘R’
Learning
n
(Address, {port})
0
0
0
1
1
1
2
2 Forwarding 2
n
n
ETH_CI
n
ETH_CI
MI_FF_ Learning
23
n
Address Table
(Address, port)
ETH/ETH-m_A_MP
ETH_CI
(Address, {port})
Address
MI_FF_Flush_Learned
MI_FF_ Flush_Config
MI_FF_Group_Default
MI_FF_ETH_FF
MI_FF_Ageing
0
1
MI_FF_STP_LearningState[]
G.8021 ETH Flow Forwarding (FF) process in SVL mode
MEP and MIP functions in E-LAN/E-Tree
24
MEPs and MIPs in these E-LAN cases
Looking at the model of E-LAN Node B2 I am wondering where the MEP and MIP
functions should be located
Two locations are considered
 Red
 Green
P21
P20
Green locations are consistent with
802.1Q functionality order, but require
extensions to the G.8021 MEP Sink and
MIP Sink functions, which currently do not
support to read OAM from “multiple VIDs”
25
PV
P Ia
P Ib
Red locations imply that the VID
Translation is located between
the UP MEPs and the MAC Relay,
which is not consistent with its
current location in the clause 6.9
Support of the EISS function
P
B2
SVL
BV
BV
R
V
B Ia
P23
Ia
B Ib
Ib
P24
K
P25
L
MEPs and MIPs in these E-Tree cases
Looking at the model of E-Tree Node B2 I am wondering where the MEP and MIP
functions should be located
Green locations are consistent with
802.1Q functionality order
26
P21 R
PI
P I
Red locations imply that the VID
Translation is located between
the UP MEPs and the MAC Relay,
which is not consistent with its
current location in the clause 6.9
Support of the EISS function
P
P20
B
RR
RR
Two locations are considered
 Red
 Green
B2
SVL
BI
BR
R
I
M
P24
Both Red and Green locations require
extensions to the G.8021 MEP Sink and MIP Sink
functions to support reading from “multiple VIDs”
P25
K
L
MEP and MIP primary VID assignments in E-LAN node B2
MAC Relay
Primary VID: Ib
Primary VID: V
Primary VID: V
Primary VID: Ia
Primary VID: V
Primary VID: Ib
Primary VID: V
Primary VID: V
Primary VID: V
Primary VID: V
P20
LAN
Up and Down MEP and
Half MIP functions have
same primary VID (V)
27
P21 and P23
Ib
.. Ib
V
.. V
Ib
.. Ib
Ia
.. Ia
V
BV
B Ib
Ia Ib
B Ia
BV
V
LAN
Up MEP and Half MIP
functions have different
primary VID (Ia) than
Down MEP/Half MIP (V)
P24 and P25
Ia
V
.. V
Primary VID: Ia
.. Ia
Primary VID: V
LAN
Up MEP and Half MIP
functions have different
primary VID (Ib) than
Down MEP/Half MIP (V)
Primary VID values for the Up MEP/HalfMIP functions on the three port sets are
different (V, Ia and Ib); configuration should be performed carefully
MEP and MIP primary VID assignments in 3rd type E-Tree
node B2
MAC Relay
Primary VID: R
Primary VID: I
Primary VID: R
Primary VID: R
Primary VID: I
Primary VID: R
Primary VID: R
Primary VID: R
P21 and P25
P20 and P24
.. R
R
.. I
.. R
.. I
LAN
Up and Down MEP and
Half MIP functions have
same primary VID (R)
28
I
I R
.. R
R
.. I
I
LAN
Up MEP and Half MIP
functions have different
primary VID (I) than
Down MEP/Half MIP (R)
Primary VID values for the Up MEP/HalfMIP functions on the two port sets are
different (R and I); configuration should be performed carefully
MEP and MIP primary VID assignments in 4th type E-Tree
node B2
MAC Relay
Primary VID: R
Primary VID: R
Primary VID: I
Primary VID: R
Primary VID: I
Primary VID: R
Primary VID: R
Primary VID: R
Primary VID: R
P21 and P25
P20
I
LAN
Up MEP and Half MIP
functions have different
primary VID (I) than
Down MEP/Half MIP (R)
VG1 VG1 R
KI
BR
R
BI
.. R
.. I
.. VG1
LAN
Up and Down MEP and
Half MIP functions have
same primary VID (R)
29
I
VG1 I R
.. R
R
.. I
.. VG1
VG1 I
P24
KR
Primary VID: I
N VG1
Primary VID: I
N VG1
Primary VID: R
LAN
Up MEP and Half MIP
functions have different
primary VID (I) than
Down MEP/Half MIP (R)
Primary VID values for the Up MEP/HalfMIP functions on the three port sets are
different (R and I); configuration should be performed carefully
G.8021 MEP/MIP functions
G.8021 ETH MIP function has single ETH_FP
 To support the multi-VID E-Tree the G.8021 MIP function should get multiple
ETH_FPs
 OAM XXM frames may ingress on each of those ETH_FPs and the
associated XXR frames may egress on the primary_ETH_FP
G.8021 specifies ETH MEP and ETHG MEP functions
 ETH MEP function contains a single ETH_FP
 ETHG MEP function contains multiple ETH_FPs
 OAM frames can be read/extracted from one ETH_FP only
 OAM frames can be generated/inserted into one ETH_FP only
 The multi-VID E-Tree models require and ETH MEP function with multiple
ETH_FPs, with reading/extracting capabilities of OAM frames on every
ETH_FP and generating/inserting capabilities of OAM frames on the
primary_ETH_FP only
 ETH and ETHG MEP functions could be merged into one ETH MEP function, or
alternatively the ETH MEP function can be left unchanged and the ETHG MEP
function can be extended to read/extract OAM from every ETH_FP
30