http://www.ieee802.org/1/files/public/docs2010/liaison-nfinn-split-horizon-vid-filtering-0710-v04.pdf describes in pages 19 and 20 the

1
Introduction

• http//www.ieee802.org/1/files/public/docs2010/lia
  ison-nfinn-split-horizon-vid-filtering-0710-v04.pd
  f 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
• Slide 2 adds the information in page 20 into the
  figure in page 19 and it illustrates the internal
  configuration of node B1 with the I and V
  Relay-VIDs and the VID translation at the egress
  ports
• Slide 3 introduces a VLAN with two domains
  interconnected by node B2. Slide 4 describes that
  two internal domain VIDs (Ia, Ib) are to be used
  in this case. It illustrates which Relay-VIDs are
  registered at each output port, which VID
  translation at egress ports is required and which
  VID values are used on the links between the
  nodes.
• Slide 5 extend the single domain case and
  illustrates that with the use of VID translation
  at the ingress ports in the domain it is possible
  to use different VID values on each of the inner
  domain links.
• Slide 6 extends the two domain case and
  illustrates that with the use of VID translation
  at the ingress ports in each domain it is
  possible to use different VID values on each of
  the inner domain links.
• Slides 7 and 8 illustrate the location of MEP and
  MIP functions in these two cases
• Slide 9 presents my understanding of the
  application of this model to (H)VPLS in MPLS
  networks.

2
E-LAN (I)
C11
P11
B1
C12
I
VID Translation at egress port
P10
P13
P12
B3
P31
P30
I
C3
P32
B1
V
P21
P11
P23
B2
P20
I
C2
VLAN has common VID value I on the inner links
B1-B2, B2-B3 and B3-B1
P10
C11
V
V
SVL
V
V
I
I
I?V
V,I
I
B1
V?I
C12
V?I
V
V,I
V
P13
I
I?V
V
I?V
B3
V
V
V,I
I
P12
I
C3
I?V
V
I
V?I
V
I?V
V
B2
V
V,I
C2
V?I
VLAN has 2 Relay-VID values I and V which
operate in SVL mode
V?I
X External VID
X?Y, Y? X Relay-VID X to VID Y Translation at
egress port
SVL Shared VLAN Learning
X Internal Relay-VID
3
E-LAN (II)
C11
P11
B1
C12
P10
P13
P12
B3
P31
P30
C3
P32
P21
P23
B2
P20
C2
VLAN has two domains with a full mesh of links
P24
P25
P52
P42
P55
B4
B5
P54
P45
P40
C52
C4
P50
C51
4
E-LAN (II)
C11
VLAN has common VID value Ia on the inner links
B1-B2, B2-B3 and B3-B1
V
I?V
V,I
VLAN in Node B2 has 3 Relay-VID values Ia, Ib
and V which operate in SVL mode
B1
V?Ia
C12
V?Ia
V
V,Ia
V
Ia
Ia?V
V
Ia?V
B3
V
V
V,Ia
C3
Ia
Ia?V
V
V,Ib?Ia
V,Ib
Ia
Ia?V
Ia
V,Ib
B2
B2
V
V,Ia,Ib
C2
P21
V,Ib?Ia
V?Ia,Ib
V,Ib
V,Ib
V,Ia?Ib
Ib?V,Ia
VLAN has common VID value Ib on the inner links
B2-B4, B4-B5 and B5-B2
SVL
Ib
Ib
P20
Ia
V
V
Ib?V
V?Ib
V
V
Ia
P23
V
Ib
V
V
B4
B5
V
V,Ib
V,Ib
C52
C4
V?Ib
V?Ib
Ib?V
Ib?V
Ib
V,Ib
Ib?V
V
P24
VID Translation at egress port
C51
Ib
Ib
P25
X External VID
X?Y, Y? X Relay-VID X to VID Y Translation at
egress port
SVL Shared VLAN Learning
X Internal Relay-VID
5
E-LAN (III)
C11
P11
B1
C12
Q
P10
P13
P12
B3
P31
P30
P
C3
P32
B1
V
P21
P11
P23
B2
R
P20
C2
P10
VLAN has different VID values P, Q and R on
the inner links B1-B2, B2-B3 and B3-B1
C11
V
V
SVL
V
I
V
Q
I?V
V,I
I
I?Q V?Q
Q
B1
V?I
Q
C12
Q?I Q?V
V
V,I
V
P13
P?I P?V
Q
V
B3
V
V
V,I
R
P12
P
C3
I?V
I?P V?P
V
R
R?I R?V
V
V
B2
V
V,I
C2
I?R V?R
V?I
VID Translation at egress port
VID Translation at ingress port
X?Y, Y? X VID Y to Relay-VID X Translation at
ingress port
X External VID
SVL Shared VLAN Learning
X Internal Relay-VID
X?Y, Y? X Relay-VID X to VID Y Translation at
egress port
6
E-LAN (IV)
VLAN has different VID values P, Q and R on
the inner links B1-B2, B2-B3 and B3-B1
C11
V
I?V
V,I
I?Q V?Q
B1
V?I
C12
Q?I Q?V
V
V,I
V
Q
V
P?I P?V
B3
V
V
V,I
P
C3
Ia?P V,Ib?P
I?V
V
R
V,Ib
R?I R?V
P
V,Ib
B2
B2
V
V,Ia,Ib
Ia?R V,Ib?R
C2
P21
V?Ia,Ib
VLAN has different VID values K, L and M on
the inner links B2-B4, B4-B5 and B5-B2
V,Ib
K?Ib K?V,Ia
V,Ib
Ib?L V,Ia?L
SVL
L
K
P20
R
V
V
L?V
V?K
V
V
Ia
P23
M
V
V
V
B4
B5
V
V,I
V,I
C52
C4
V?I
V?M
M?V
I?V
Ib
V,I
I?V
VID Translation at egress port
P24
V
C51
VID Translation at ingress port
K
L
P25
X External VID
X?Y, Y? X VID Y to Relay-VID X Translation at
ingress port
X?Y, Y? X Relay-VID X to VID Y Translation at
egress port
SVL Shared VLAN Learning
X Internal Relay-VID
7
MEPs and MIPs in these E-LAN cases

• Looking at the models of Nodes B1 and B2 I am
  wondering where we have to place the MEP and MIP
  functions
• Most logical location of the MEP and MIP
  functions is at the edge of the yellow ellipses
  this minimizes the number of MEP and MIP
  instances to one UP MEPMIPDOWM MEP set per port

Ia
B2
P21
B1
V
P11
SVL
P20
P10
Ia
V
V
V
V
SVL
Ia
P23
I
V
Ib
Q
I
Q
Q
P13
P24
R
P12
Ib
Ib
P25
8
MEPs and MIPs in these E-LAN cases

• Same two nodes, now with VID Translation at some
  of the ingress ports

P
B2
P21
V
SVL
P20
R
V
V
V
Ia
P23
Ib
Q
P24
R
K
L
P25
9
E-LAN in MPLS (VPLS, HVPLS)

• Same model can be deployed for E-LAN support in
  MPLS i.e. VPLS and HVPLS
• External VID is to be replaced by PW label, and
  VLAN Tag is to be replaced by PW Label Stack
  Entry header
• PW label values might be different in the two
  directions
• For such case the PWlabel-to-RelayVID and
  RelayVID-to-PWlabel translations will use the
  different PW label values
• Relay-VID is represented by means of a VSI
• n VSIs (n2) are part of a Shared VSI Learning
  (SVL) group

10
E-Tree

• To be added in v02