www.netmanias.com
VLAN 기반의Transparent LAN Service (TLS)

2001년2월5일
손장우
010-3460-5747
02-3444-5747
http://, son@netmanias.com

2
catalyst
Classifying Metro Ethernet Services
Metro Ethernet Service
Connectivity within MEN
PtP EVC
(VPWS, PW, ELS, VLL)
MPtMP EVC
(VPLS, E-LAN Service, TLS)
EPL 서비스
(EWS)
ERS 서비스
(ERS)
LAN Extension
서비스
(EMS)
ERMS서비스
(ERMS)
catalyst
catalyst
catalyst
catalyst
catalyst
EVC1
EVC2
EVC3
CE
CE
CE
CE
CE
UNI
UNI
UNI
UNI
UNI
UNI
catalyst
catalyst
catalyst
EVC1
CE
CE
CE
CE
UNI
UNI
UNI
catalyst
CE
UNI
catalyst
catalyst
catalyst
EVC1
EVC3
CE
CE
CE
Multiplexed
UNI
UNI
UNI
ISP POP
Router
UNI
EVC2
VLAN 1
VLAN 2
VLAN 3
ATMswitchrouter
catalyst
catalyst
catalyst
EVC1
CE
CE
CE
CE
UNI
UNI
UNI
CE
Service Multiplexed UNI
ATMswitchrouter
ISP POP
Router
EVC2
L2/3
L2/3
L3
L2/3
L3
A EVC
A EVC
Service Interface
Physical port/
Logical port (VLAN)
Private Line Service에해당
FR서비스에해당

3
VLAN-based Multipoint (TLS) service
Lookup Table
MAC  VLAN ID    VLAN type     Port
-10            port-based          1
-10                  tagged          3
-20            port-based          2
-20                  tagged          3
Lookup Table
MAC  VLAN ID    VLAN type     Port
-10            port-based          4
-10                  tagged          6
-20            port-based          5
-20                  tagged          6
Lookup Table
MAC  VLAN ID    VLAN type     Port
-10                  tagged          1
-10                  tagged          2
-10                  tagged          3
-20                  tagged          1
-20                  tagged          2
MTU-Metro
MTU-Metro
MTU-Metro
1
2
3
1
2
3
6
4
5
1
2
Lookup Table
MAC  VLAN ID    VLAN type     Port
-10            port-based          2
-10                  tagged          1
Optical Router
Core Router
Optical Router
Optical Router
Optical Router
Core Router
Core Router
Core Router
Core Router
CE1
CE
CE2
CE
CE3
VLAN 10
1
VLAN 20
Customer 1
Site 1
Customer 1
Site 2
Customer 1
Site 3
Customer 2
Site 1
Customer 2
Site 2

4
Operation
MTU-Metro
Lookup Table
MAC  VLAN ID    VLAN type     Port
A       10            port-based          1
-10                  tagged          3
-20            port-based          2
-20                  tagged          3
Lookup Table
MAC  VLAN ID    VLAN type     Port
-10            port-based          4
A      10                  tagged         6
-20            port-based          5
-20                  tagged          6
Lookup Table
MAC  VLAN ID    VLAN type     Port
A       10                  tagged         1
-10                  tagged          2
-10                  tagged          3
-20                  tagged          1
-20                  tagged          2
MTU-Metro
MTU-Metro
1
2
3
1
2
3
6
4
5
1
2
Lookup Table
MAC  VLAN ID    VLAN type     Port
-10            port-based          2
A      10                  tagged         1
ARP
Optical Router
Core Router
Optical Router
Optical Router
Optical Router
Core Router
Core Router
Core Router
Core Router
CE1
A
ARP
ARP
10
10
10
ARP
ARP
ARP
B
C
192.168.10.1
192.168.10.2
192.168.10.3
Customer 1
Site 1
Customer 1
Site 2
Customer 1
Site 3
CE2
CE3

5
Operation
MTU-Metro
Lookup Table
MAC  VLAN ID    VLAN type     Port
A       10            port-based        1
B       10                  tagged         3
-20            port-based          2
-20                  tagged          3
Lookup Table
MAC  VLAN ID    VLAN type     Port
B       10            port-based       4
A      10                  tagged         6
-20            port-based          5
-20                  tagged          6
Lookup Table
MAC  VLAN ID    VLAN type     Port
A       10                  tagged         1
B       10                  tagged         2
-10                  tagged          3
-20                  tagged          1
-20                  tagged          2
MTU-Metro
MTU-Metro
1
2
3
1
2
3
6
4
5
1
2
Lookup Table
MAC  VLAN ID    VLAN type     Port
-10            port-based          2
A      10                  tagged         1
Optical Router
Core Router
Optical Router
Optical Router
Optical Router
Core Router
Core Router
Core Router
Core Router
CE1
A
Reply
DA=A
SA=B
10
10
B
C
CE2
Reply
DA=A
SA=B
Reply
DA=A
SA=B
Reply
DA=A
SA=B
192.168.10.1
192.168.10.2
192.168.10.3
Customer 1
Site 1
Customer 1
Site 2
Customer 1
Site 3
CE3

6
Operation
MTU-Metro
Lookup Table
MAC  VLAN ID    VLAN type     Port
A       10            port-based        1
B,C   10                  tagged         3
-20            port-based         2
-20                  tagged         3
Lookup Table
MAC  VLAN ID    VLAN type     Port
B       10            port-based         4
A, C   10                  tagged         6
-20            port-based         5
-20                  tagged         6
Lookup Table
MAC  VLAN ID    VLAN type     Port
A       10                  tagged         1
B       10                  tagged         2
C       10                  tagged          3
-20                  tagged          1
-20                  tagged          2
MTU-Metro
MTU-Metro
1
2
3
1
2
3
6
4
5
1
2
Lookup Table
MAC  VLAN ID    VLAN type     Port
C       10            port-based          2
A,B    10                  tagged         1
Optical Router
Core Router
Optical Router
Optical Router
Optical Router
Core Router
Core Router
Core Router
Core Router
CE1
A
B
C
CE2
192.168.10.1
192.168.10.2
192.168.10.3
Customer 1
Site 1
Customer 1
Site 2
Customer 1
Site 3
CE3
이후는Unicast (모든MAC이학습됨)
Multicast: Dest MAC을보고그대로포워딩

7
VLAN-based Multipoint service: VPLS/TLS
MTU-Metro
Lookup Table
MAC  VLAN ID    VLAN type     Port
A       10            port-based        1
B,C   10                  tagged         3
-20            port-based         2
-20                  tagged         3
Lookup Table
MAC  VLAN ID    VLAN type     Port
B       10            port-based         4
A, C   10                  tagged         6
-20            port-based         5
-20                  tagged         6
Lookup Table
MAC  VLAN ID    VLAN type     Port
A       10                  tagged         1
B       10                  tagged         2
C       10                  tagged          3
-20                  tagged          1
-20                  tagged          3
MTU-Metro
MTU-Metro
1
2
3
1
2
3
6
4
5
1
2
Lookup Table
MAC  VLAN ID    VLAN type     Port
C       10            port-based          2
A,B    10                  tagged         1
Optical Router
Core Router
Optical Router
Optical Router
Core Router
Core Router
Core Router
Core Router
CE1
A
B
C
CE2
192.168.10.1
192.168.10.2
192.168.10.3
D
E
Optical Router
Optical Router
MAC         VLAN ID    Port
A                  10           1
B                  10           2
C                  10           3
D                  20           4
E                  20           5
L2 Switch
Lookup Table
Customer 1
Site 1
Customer 1
Site 2
Customer 1
Site 3
CE3

8
Problem of VLAN-based TLS
SwitchATMFastEthr
SwitchATMFastEthr
SwitchATMFastEthr
SwitchATMFastEthr
SwitchATMFastEthr
SwitchATMFastEthr
SwitchATMFastEthr
router-generic
router-generic
router-generic
router-generic
router-generic
router-generic
router-generic
router-generic
CPE
SwitchATMFastEthr
Ingress Rate Limiting/Shaping
100
100
100
100
100
100
802.1q tagged VLAN 설정
A Broadcast Domain over
Metro Ethernet Network
#NAME?
802.1p CoS 제공
= Classification, Marking,  Priority queueing and scheduling
ESP network
.VLAN space limitation: 4096 VLANs (VLAN ID=12bits)
.MAC address limitation
.No Bandwidth reservation in metro core (end-to-end)
.No traffic engineering in metro core (STP Path)
.Slow restoration time (STP, RSTP, EAPS)
MAC     VLAN type   VLAN ID         Port
-tagged        100               1, 2
-tagged        200               1, 3
……….
A                                                       2  
B                                                       1
C                                                       2
……….
MAC A
MAC F
MAC B
MAC C
MAC M
MAC N
MAC G
MAC H