Chapter 27 Layer 2 Protocol Tunneling
XGS1930 Series User’s Guide
212
In the following example, if you enable L2PT for STP, you can have switches
A
,
B
,
C
and
D
in the same
spanning tree, even though switch
A
is not directly connected to switches
B
,
C
and
D
. Topology change
information can be propagated throughout the service provider’s network.
To emulate a point-to-point topology between two customer switches at different sites, such as
A
and
B
,
you can enable protocol tunneling on edge switches
1
and
2
for PAgP (Port Aggregation Protocol),
LACP or UDLD (UniDirectional Link Detection).
Figure 148
L2PT Network Example
27.1.2.1 Layer 2 Protocol Tunneling Mode
Each port can have two layer 2 protocol tunneling modes,
Access
and
Tunnel
.
• The
Access
port is an ingress port on the service provider's edge device (
1
or
2
) and connected to a customer switch (
A
or
B
). Incoming layer 2 protocol packets received on an
access port are encapsulated and forwarded to the tunnel ports.
• The
Tunnel
port is an egress port at the edge of the service provider's network and connected to
another service provider’s switch. Incoming encapsulated layer 2 protocol packets received on a
tunnel port are decapsulated and sent to an access port.
27.2 Configuring Layer 2 Protocol Tunneling
Click
Advanced Application
>
Layer 2 Protocol Tunneling
in the navigation panel to display the screen
as shown.
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Страница 105: ...Chapter 8 Basic Setting XGS1930 Series User s Guide 105 Figure 80 Basic Setting Cloud Management ...
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