Transcript new-vissers-elan-etree-multi-vid-architecture-0810-v01.ppt

Introduction
http://www.ieee802.org/1/files/public/docs2010/liaison-nfinn-split-horizonvid-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.
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E-LAN (I)
C11
P11
C12
B1
P10
P13
P12
I
P31
I
C2
B2
P32
B3
P30
C3
V
P11
I
VI
P20
P21
P23
VID Translation at
egress port
VLAN has common VID
value ‘I’ on the inner links
B1-B2, B2-B3 and B3-B1
C11
P10
V
I V
V,I
V I
C2
2
V
V,I
VI
I
V,I
B1
I V
V
SVL
VI
VI
V
VI
V
C12
B1
V
V
I
I
V
I
V
V
B3
V,I
I V
V
C3
P12
I
V
B2
VLAN has 2 Relay-VID
values ‘I’ and ‘V’ which
operate in SVL mode
X: External VID
X: Internal Relay-VID
XY, Y X: Relay-VID X to VID Y Translation at egress port
SVL: Shared VLAN Learning
I
P13
E-LAN (II)
C11
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
B5
P55
P50
C51
3
B3
B2
P24
C4
P32
P21
P23
P20
C2
P31
C52
C11
I V
V
VIa
C12
V,IbIa
V
C2
V,Ia,Ib
VIa,Ib
V,I
B1
V,Ia
IaV
V
E-LAN (II)
VLAN has common VID value
‘Ia’ on the inner links B1-B2,
B2-B3 and B3-B1
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 VID value
‘Ib’ on the inner links B2-B4,
B4-B5 and B5-B2
Ib
Ia V
Ia Ib
V,Ib
V,Ib
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: External VID
X: Internal Relay-VID
XY, Y X: Relay-VID X to VID Y Translation at egress port
SVL: Shared VLAN Learning
E-LAN (III)
C11
P11
C12
P10
B1
P13
P12
Q
P31
P
C2
B2
P30
C3
V
P11
R
VI
P20
P21
P23
P32
B3
B1
P10
VLAN has different VID values
‘P’, ‘Q’ and ‘R’ on the inner links
B1-B2, B2-B3 and B3-B1
C11
V
VI
I V
V
VI
V,I
C2
5
V
V,I
VI
I
V,I
B1
IP PI
VP PV
V
SVL
VR
I R
C12
V
V
V
Q
P
V
R
V
V
B3
V,I
I V
V
C3
P12
Q
P13
R
V
B2
X: External VID
XY, Y X: VID Y to Relay-VID X Translation at ingress port
X: Internal Relay-VID
XY, Y X: Relay-VID X to VID Y Translation at egress port
VID Translation
at ingress port
VID Translation
at egress port
SVL: Shared VLAN Learning
E-LAN (IV)
VLAN has different VID values
‘P’, ‘Q’ and ‘R’ on the inner links
B1-B2, B2-B3 and B3-B1
C11
I V
V
VI
C12
V
C2
B1
PI
PV
V,I
IaP
V,IbP
V
V,I
V
V
Q
V
V,Ib
B3
V,I
V
I V
C3
R
V,Ib
V,Ia,Ib
VIa,Ib
V
P
P
P21
B2
L
V
V V,I
VI
B4
B5
I V
V,I
V
C51
6
X: External VID
X: Internal Relay-VID
V,I
I V
V Ia
V
C52
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Y, Y X: Relay-VID X to VID Y Translation at egress port
R
V
V
M V
V
V  M M V
B2
SVL
P20
V
C4
PV
K
P Ia
P Ib
VLAN has different VID values
‘K’, ‘L’ and ‘M’ on the inner links
B2-B4, B4-B5 and B5-B2
V,Ib
V,Ib
V Ib
P23
Ia
Ib
P24
K
P25
L
SVL: Shared VLAN Learning
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
P21
P11
VI
B1
Ia V
Ia Ib
V
SVL
P20
P10
V
V
V
VI
V Ib
I
VR
I R
P12
R
P23
Ia
Ib
Q
P13
P24
Ib
P25
7
Ia
V
V Ia
SVL
B2
Ib
MEPs and MIPs in these E-LAN cases
Same two nodes, now with VID Translation at some of the
ingress ports
P
P21
P11
VI
B1
V
V
VI
V Ia
V Ib
I
VR
I R
P12
R
P13
P23
Ia
Ib
P24
K
P25
8
R
V
SVL
Q
B2
SVL
P20
P10
V
PV
P Ia
P Ib
V
L
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
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E-Tree
To be added in v02
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