1

Introductionhttp://www.ieee802.org/1/files/public/docs2010/liaison-nfinn-split-horizon-vid-filtering-0710-v04.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:

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

B1B1

B1

B2

B3P21

P23

P32

P31

P13P12

P10

P20

P30

C12

C2

C3

B1

B2

B3

VV

IV

II

V

V

V

C12

C2

C3

V

V

V,I

V,I

V,I

V

X: External VIDX: Internal Relay-VID

VI

XY, Y X: Relay-VID X to VID Y Translation at egress port

IV

V

I

VI

IV IV

IV

VI

VI

I

V SVL

C11

IV

IV

IV

IV

V

V

I

I

C11

P11

V

V,IIV

P13

P12

P10

P11

E-LAN (I)

I

I

I

VLAN has common VID value ‘I’ on the inner links B1-B2, B2-B3 and B3-B1

SVL: Shared VLAN Learning

VLAN has 2 Relay-VID values ‘I’ and ‘V’ which operate in SVL mode

VID Translation at egress port

3

B1

B2

B3P21

P23

P32

P31

P13P12

P10

P20

P30

C12

C2

C3

C52

C11

C51

P11

E-LAN (II)

B4 B5

P24P25

P52P54

P42P45

P50

P40C4

P55

VLAN has two domains with a full mesh of links

4

B1

B2

B3

C12

C2

C3

C52

C11

C51

E-LAN (II)

B4 B5C4

B2B2

Ia

V

SVL

IaV

IbV

IaVV

Ia

Ia

Ib

P23

P24

P20

P21V,Ib

Ia

Ia

Ia

V

V

V V

V,Ia

V,Ia,Ib

V,Ia

V

IaVV

,Ib

Ia

VIa

Ia

V IaV

IaV

VIa

VIa,Ib

V

V,IIV

V,IbV

V

V,IbIa

Ib

IbIb

V

V

V

V,IbV,Ib

VV

VV

V,IaIbIb

V

,Ia

V,Ib

VIb

V

Ib

VIb IbV

IbV

V,Ib

IbV Ib

IbV

V,Ib

IaIb

P25

IbV

IbIa

IaV

IaIb

IbVIbIa

Ib

VLAN has common VID value ‘Ib’ on the inner links B2-B4, B4-B5 and B5-B2

VLAN has common VID value ‘Ia’ on the inner links B1-B2, B2-B3 and B3-B1

VLAN in Node B2 has 3 Relay-VID values ‘Ia’, ‘Ib’ and ‘V’

which operate in SVL mode

VID Translation at egress port

X: External VIDX: Internal Relay-VID XY, Y X: Relay-VID X to VID Y Translation at egress port SVL: Shared VLAN Learning

5

B1B1

B1

B2

B3P21

P23

P32

P31

P13P12

P10

P20

P30

C12

C2

C3

B1

B2

B3

VV

RV

QP

V

V

V

C12

C2

C3

V

V

V,I

V,I

V,I

V

IR

VR

XY, Y X: Relay-VID X to VID Y Translation at egress port

IV

IP

V

P

IQVQ

P

IP

V

QIQV

RI

RV

VI

VI

I

V SVL

C11

IV

IV

RV

QV

V

V

Q

R

C11

P11

V

V,IIV

P13

P12

P10

P11

E-LAN (III)

XY, Y X: VID Y to Relay-VID X Translation at ingress port

RI Q

I

R

Q

P

VID Translation at egress port

VID Translation at ingress port

VLAN has different VID values ‘P’, ‘Q’ and ‘R’ on the inner

links B1-B2, B2-B3 and B3-B1

X: External VIDX: Internal Relay-VID SVL: Shared VLAN Learning

6

B1

B2

B3

C12

C2

C3

C52

C11

C51

E-LAN (IV)

B4 B5C4

B2B2

Ia

V

SVL

IaV

LV

RVV

P

R

L

P23

P24

P20

P21V,Ib

R

QP

V

V

V V

V,I

V,Ia,Ib

V,I

V

IV

VI

VIa,Ib

V

V,IIV

V,IbV

V

M

LK

V

V

V

V,IbV,Ib

VV

VV

IbL

V,IaLK

Ib

K

V,I

a

V,I

VI

V

K

VM MV

L

V

V,I

IV Ib

IVV,I

RIb

P25

IbV

LIa

PV

PIb

KVKIa

K

VID Translation at egress port

VLAN has different VID values ‘P’, ‘Q’ and ‘R’ on the inner

links B1-B2, B2-B3 and B3-B1

VLAN has different VID values ‘K’, ‘L’ and ‘M’ on the inner

links B2-B4, B4-B5 and B5-B2

IaR

V,IbR

Ia

PV

,Ib

P

IQVQ

P

IP

V

QIQV

RI

RV

PIa

RIa

LIbKIa

VID Translation at ingress port

X: External VIDX: Internal Relay-VID XY, Y X: Relay-VID X to VID Y Translation at egress port SVL: Shared VLAN Learning

XY, Y X: VID Y to Relay-VID X Translation at ingress port

7

MEPs and MIPs in these E-LAN casesLooking 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 MEP+MIP+DOWM MEP set per port

B1B1

I

V SVL

IV

IV

RV

QV

V

V

Q

R

P13

P12

P10

P11

RI Q

I

B2B2

Ia

V

SVL

IaV

IbV

IaVV

Ia

Ia

Ib

P23

P24

P20

P21

Ib

IaIb

P25

IbV

IbIa

IaV

IaIb

IbVIbIa

Ib

8

B2B2

Ia

V

SVL

IaV

LV

RVV

P

R

L

P23

P24

P20

P21

Ib

RIb

P25

IbV

LIa

PV

PIb

KVKIa

K

PIa

RIa

LIbKIa

B1B1

I

V SVL

IV

IV

RV

QV

V

V

Q

R

P13

P12

P10

P11

RI Q

I

MEPs and MIPs in these E-LAN cases

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

V

V

Q

R

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 (n≥2) are part of a “Shared VSI Learning” (SVL) group

10

E-Tree

To be added in v02