Cisco 3825 - Manual (Page 23)

1-13
Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
OL-15667-03
Chapter 1 Overview of the Cisco 3825 Mobile Wireless Edge Router
New Features in Cisco IOS Release 12.4(16)MR2
Figure 1-5 Example of Cisco 3825 Router VWIC and NM-2W Configuration Options Block Diagram
New Features in Cisco IOS Release 12.4(16)MR2
With Cisco IOS Release 12.4(16)MR2, the Cisco MWR 1941-DC-A router supports the following
feature:
• Keyword ignore-vpi-vci Added to xconnect Command, page 1-13
Keyword ignore-vpi-vci Added to xconnect Command
With the ignore-vpi-vci keyword configured, the MWR ignores the VPI/VCI value in the PW packet and
does a blind rewrite with the local configured AC-side PVC's VPI/VCI value. This applies only when
the xconnect command is configured under the PVC, which is the N:1 with N=1 special case. It does not
apply when the xconnect command is configured under the subinterface, which supports N>1.
The xconnect command with keyword ignore-vpi-vci results in the PVC mapping being done in a
cooperative way if the MWR works the same way as the receiving router. Without this command, the
MWR checks the VPI/VCI value inside PW packet for matches against the local configured PVC or
PVC-mapping. With the ignore-vpi-vci keyword configured, the MWR ignores the VPI/VCI header
inside the received PW packet and does a blind rewrite with the local configured AC-side PVC's
VPI/VCI value.
New Features in Cisco IOS Release 12.4(16)MR1
With Cisco IOS Release 12.4(16)MR1, the Cisco 3825 router supports the following:
GSM
• VWIC-2T1/E1-RAN
used for T1/E1
• *MUST* reside in one
of four WIC slots to
traverse HDLC Ctrl
(8 GSM E1 max)
AIM-ATM-8
Module on
Motherboard
NM - 2W
UMTS
lub
IP
UMTS
• VWIC-2T1/E1-RAN
used for T1/E1
• VWIC FPGA unused
for
UMTS
• Direct routing to
AIM-ATM
IP
• VWIC-2T1/E1-RAN
used for T1/E1
• VWIC FPGA unused
for
IP
• Direct routing to
IOS
CPU
IOS CPU
RAN WIC RAN WIC
NM - 2W
UMTS
lub
IP
RAN WIC RAN WIC RAN WIC RAN WIC RAN WIC RAN WIC
UMTS
lub
GSM
Abis
IP
UMTS
lub
HDLC Ctrl
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