GS2210 Series User’s Guide
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H A P T E R
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Layer 2 Protocol Tunneling
28.1 Layer 2 Protocol Tunneling Overview
This chapt er shows you how t o configur e layer 2 pr ot ocol t unneling on t he Sw it ch.
28.1.1 What You Can Do
Use t he La y e r 2 Pr ot ocol Tu n n e l scr een (
) t o enable layer 2 pr ot ocol
t unneling on t he Swit ch and specify a MAC address w it h w hich t he Swit ch uses t o encapsulat e t he
layer 2 pr ot ocol packet s by r eplacing t he dest inat ion MAC addr ess in t he packet s.
28.1.2 What You Need to Know
Layer 2 pr ot ocol t unneling ( L2PT) is used on t he ser vice pr ovider 's edge devices.
L2PT allow s edge sw it ches ( 1 and 2 in t he follow ing figur e) t o t unnel layer 2 STP ( Spanning Tr ee
Pr ot ocol) , CDP ( Cisco Discover y Prot ocol) and VTP ( VLAN Tr unking Pr ot ocol) packet s bet w een
cust om er sw it ches ( A, B and C in t he following figur e) connect ed t hr ough t he ser vice pr ovider ’s
net w or k. The edge sw it ch encapsulat es layer 2 pr ot ocol packet s w it h a specific MAC addr ess befor e
sending t hem acr oss t he ser vice pr ovider ’s net w or k t o ot her edge swit ches.
Figure 183
Layer 2 Pr ot ocol Tunneling Net w or k Scenar io
I n t he following exam ple, if you enable L2PT for STP, you can have sw it ches A, B, C and D in t he
sam e spanning t r ee, even t hough sw it ch A is not dir ect ly connect ed t o sw it ches B, C and D.
Topology change inform at ion can be pr opagat ed t hr oughout t he ser vice pr ov ider ’s net wor k.
To em ulat e a point - t o- point t opology bet w een t w o cust om er sw it ches at differ ent sit es, such as A
and B, you can enable pr ot ocol t unneling on edge swit ches 1 and 2 for PAgP ( Por t Aggr egat ion
Pr ot ocol) , LACP or UDLD ( UniDir ect ional Link Det ect ion) .
1
2
A
C
Service Provider's
Network
STP
CDP
B
VTP
STP
VTP
CDP
Содержание GS2210-24
Страница 18: ...18 PART I User s Guide ...
Страница 33: ...33 PART II Technical Reference ...
Страница 110: ...Chapter 9 VLAN GS2210 Series User s Guide 110 Figure 83 Advanced Application VLAN Port Based VLAN Setup All Connected ...
Страница 111: ...Chapter 9 VLAN GS2210 Series User s Guide 111 Figure 84 Advanced Application VLAN Port Based VLAN Setup Port Isolation ...
Страница 178: ...Chapter 21 Classifier GS2210 Series User s Guide 178 Figure 127 Classifier Example ...
Страница 405: ...Chapter 51 Configure Clone GS2210 Series User s Guide 405 Figure 286 Management Configure Clone ...
Страница 433: ...Appendix D Legal Information GS2210 Series User s Guide 433 Environmental Product Declaration ...