Cisco 7246 - uBR Router, Руководство по установке оборудования

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Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide
OL-5421-03
Chapter 1 Cisco uBR7200 Series Overview
Cisco uBR7200 Series Network Interface Overview
Note Some port adapters available for the Cisco uBR7246VXR only work if a minimum hardware revision
requirement has been satisfied. For specific information, refer to the
Cisco uBR7200 Series Software
Configuration Guide at the following URL:
http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/configuration/guide/cr72scg.html
Figure 1-4 Cisco uBR7246VXR Chassis Port and Cable Interface Line Card Locations
MAC-Layer Address
All LAN interfaces (ports) require unique MAC-layer addresses, also known as hardware addresses.
Typically, the MAC address of an interface is stored on a memory component that resides directly on the
interface circuitry; however, the OIR feature requires a different method. For a description of OIR, refer
to the
“Online Insertion and Removal” section on page 1
The OIR feature allows you to remove a port adapter or cable interface card and replace it with another
identically configured one. If the new port adapter or cable interface card matches the port adapter or
cable interface card you removed, the system immediately brings it online. In order to allow OIR, an
address allocator with a unique MAC address is stored in EPROM on the universal broadband router
midplane. Each address is reserved for a specific port and slot in the router regardless of whether a port
adapter or a cable interface card resides in that slot.
The MAC addresses are assigned to the slots in sequence. The first addresses are assigned to port adapter
slot 0 and slot 1, and the next addresses are assigned to port adapter slot 2 through cable interface card
slot 6. This address scheme allows you to remove port adapters or cable interface cards and insert them
into other universal broadband routers without causing the MAC addresses to move around the network
or be assigned to multiple devices.
Note
Storing the MAC addresses for every slot in one central location means that the addresses stay with the
memory device on which they are stored.
63391
Cable
interface
cards
ENABLED
DS
uBR - MCI6
US
US
US
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0 1
2
5
ENABLED
DS
uBR - MCI6
US
US US
US
0 1 2
5
ENABLED
DS
uBR - MCI6
US US US
US
US US
0 1
2 3
4 5
ENABLED
DS
uBR - MCI6
US
US
US
US
0 1
2
5
uBR - CLK-T1
ER FREERUN FAULT
LOS
SEC
ACTIVE
Port adapter slot 0
(I/O controller)
Port adapter slot 1
(blank) Port adapter slot 2