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introduction
Introduction
  • http://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.
e lan i

V

I

V

V

I

I

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V

I

V

IV

B3

V

V,I

V

P12

I

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

e lan ii
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

P42

P52

P55

P40

B4

P45

P54

B5

C4

C52

P50

C51

e lan ii4

Ia

Ia

V

Ib

V

Ia

Ib

Ia

V

Ia

V

Ib

V

V

Ib

Ib

Ia

Ia

Ib

Ib

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,Ia

V

C3

Ia

IaV

V

V,IbIa

V,Ib

Ia

IaV

Ia

V,Ib

B2

B2

V

V,Ia,Ib

P21

C2

V,IbIa

VIa,Ib

V,Ib

V,Ib

IbV,Ia

V,IaIb

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

P23

Ia

V

V

Ib

V

V,Ib

B4

V

B5

V,Ib

C4

C52

VIb

VIb

IbV

IbV

Ib

V,Ib

IbV

V

VID Translation at egress port

P24

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

e lan iii

V

I

V

I

V

I

R

R

E-LAN (III)

C11

P11

B1

C12

Q

P10

P13

P12

B3

P31

P30

P

C3

P32

B1

V

P21

P11

P23

R

B2

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

Q

B1

VI

C12

QI

QV

V

V,I

V

P13

PI

PV

Q

V

B3

V

V,I

V

P12

R

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 ingress port

VID Translation at egress 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

e lan iv

P

P

P

Ia

Ib

V

V

R

Ia

Ib

R

R

V

Ia

V

Ib

V

V

K

L

Ia

Ia

Ia

Ib

K

K

L

L

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,I

V

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

P21

C2

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

IbL

V,IaL

V,Ib

SVL

K

L

P20

R

V

V

LV

VK

V

V

P23

Ia

M

V

V

V

V,I

B4

V

B5

V,I

C4

C52

VI

VM

MV

IV

Ib

V,I

IV

VID Translation at egress port

V

P24

C51

VID Translation at ingress port

K

L

P25

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

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

meps and mips in these e lan cases

V

I

Ia

Ia

Ib

V

V

I

V

Ia

Ib

Ia

I

V

V

R

R

Ia

V

Ib

V

V

Ib

Ib

Ia

Ia

Ib

Ib

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 MEP+MIP+DOWM MEP set per port

Ia

B2

P21

B1

V

P11

SVL

P20

P10

Ia

V

V

V

V

SVL

P23

Ia

I

V

Ib

Q

I

Q

Q

P13

P24

P12

R

Ib

Ib

P25

meps and mips in these e lan cases8

V

I

B1

V

P11

P

P

P

V

Ia

Ib

V

I

P10

V

R

V

V

Ia

Ib

R

R

SVL

V

I

V

R

R

Ia

I

V

Q

V

Ib

I

V

V

Q

Q

L

K

Ib

Ia

Ia

Ia

P13

K

L

L

K

P12

R

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

P23

Ia

Ib

Q

P24

R

K

L

P25

e lan in mpls vpls hvpls
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
e tree
E-Tree
  • To be added in v02