With the introduction
of the Cisco uBR-MC3GX60V line cards that dramatically increase the downstream
capability for the Cisco uBR10012 Universal Broadband Routers to 24 Gbps (if
all 8 line card slots are used) and the use of the DOCSIS 3.0 wideband SPAs
(with 8 Cisco Wideband SPAs), downstream traffic can increase up to 40 Gbps.
To support this
increase in downstream bandwidth and effective with Cisco IOS Release
12.2(33)SCH, the new Cisco Performance Routing Engine 5 (PRE5) module provides
up to 60 Gbps (40 Gbps downstream and 20 Gbps upstream) WAN backhaul capacity
will vary depending on the packet size.
September 09, 2014, the Cisco PRE5 uses a new version of the CPU. You must run
the Cisco IOS Release 12.2(33)SCH2 or a later release on the Cisco PRE5 for
using the new version of the CPU. The board serial number of the Cisco PRE5
with the new version of the CPU starts with CAT1837XXXX. The deviation label on
the board is D507963.
The Cisco UBR10
MC5X20 line cards are not supported on the PRE5.
Foam gaskets are
required if you are replacing an earlier generation of the PRE module with
Features of the Cisco
PRE5 module include:
512 KB NVRAM
4 GB system memory
for routing tables
256 MB of
bootflash memory and 32 MB of read-only memory monitor (ROMMON) flash memory
Up to 4 GB of eUSB
embedded USB (eUSB) flash, a mass storage device on the PRE5 and the external
USB flash, replace the low density compact flash card of the PRE4.
These PRE5 USB
interfaces are compatible with USB 2.0 specification, and work in the USB-host
supports only Cisco-certified external USB storage devices.
The Cisco IOS can
autodetect the USB disk when it is plugged in. The internal eUSB disk in the
PRE5 (the compact flash for PRE4) is recognized as ‘disk0’; the two external
USB disks are recognized as ‘disk1’ and ‘disk2’.
Megabit Ethernet interface that is the management port of the PRE5
code (ECC) on all DRAM-based memory systems to support high availability
and removal (OIR) support
PRE5 insertion and
pull out sensor support
Four SFP+ for
backhaul and four SFP+ for board-to-board wiring on the front panel
processor–forward packet engine interface
The PRE module
supports redundant operation (two PRE modules in a Cisco uBR10012 chassis). If
the primary PRE fails, the secondary PRE automatically takes over operation of
the chassis. Because all Cisco uBR10012 line cards are physically connected to
both the primary and secondary PRE modules, a switchover of PRE modules does
not require human intervention to reset the line cards, as they automatically
fail over to the redundant PRE. The PRE module is hot-swappable if there is a
redundant PRE module in the chassis.
To achieve high
availability or PRE redundancy, you must use the same model of the PREs in the
same chassis. If you have PRE4 modules and you wish to upgrade, you must
upgrade both PREs to PRE5.
If there is only one
PRE5 installed in the chassis, only four 10G SFP+ interfaces are used; the
remaining four 10G SFP+ interfaces are in down state. However, if both PRE5
engines are installed in the chassis, and the board-to-board wires are
connected, all eight SFP+ backhaul interfaces are enabled.
Figure 1. PRE5 in the
Cisco uBR10012 Chassis
||4 SFP+ for board-to-board wiring
||4 SFP+ for backhaul wiring
The front panel on the
PRE contains these ports:
Console port—A DCE
RS-232 interface used to connect a terminal to the PRE for local administrative
(AUX)—A DTE RS-232 interface used to connect a modem to the PRE for remote
10/100/1000Base-T Management port used network management LAN.
USB ports—Used for
external USB disks
LEDs—display the USB disk status.
LEDs—display the system alarm status, whether Critical, Major, or Minor.
LEDs—display the system status to indicate the alarm or failure.
Eight SFP+ module
status LEDs—display the on-board backhaul interface status.
indicates packets are being transmitted and received.
indicates that a carrier is detected and the port is able to pass traffic.
button. Pressing the ACO button on the (primary) PRE during an alarm condition
shuts off the external alarm, but does not deactivate the alarm LEDs on the PRE
front panel. Alarm LEDs on the front panel are deactivated only after the
condition that caused the alarm is corrected.
Display—displays the ROMMON, IOS system status, license information, or any
other debug information.
The PRE contains a
small lithium battery. Some jurisdictions restrict the ways in which you can
dispose items containing lithium batteries. In particular, never dispose of
lithium batteries or products containing lithium batteries in an unregulated
fire. Other restrictions may apply in your area.
Ultimate disposal of
this product should be handled according to all national laws and regulations.