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Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
OL-16506-17
Chapter 5 Software Upgrade Processes Supported by Cisco ASR 1000 Series Routers
Upgrade Process with Service Impact for Nonredundant Platforms
Upgrade Process with Service Impact for Nonredundant
Platforms
Subpackage software upgrade is supported for nonredundant platforms such as Cisco ASR 1001 Router,
Cisco ASR1001-X, Cisco ASR 1002, Cisco ASR 1002-X, and ASR 1004 Routers in subpackage mode.
This is because the software upgrade procedure on these chassis types requires an RP reload when
upgrading the RPBase subpackage at the last step.
During the software upgrade process, there will be outage on the control plane as the entire platform is
rebooted so that access to the router operating system and ROMmon is lost for a period of time.
For non-hardware-redundant chassis types, SIP impact can be mitigated by installing SIPs one slot at a
time if SPAs are redundant across SIPs (such as when using Gigabit Etherchannel). ESP redundancy
provides similar capability for the ESP allowing hitless upgrade of a chassis from one software release
to another. Consolidated package mode does not provide such a per-slot staging option and always incurs
a traffic loss equivalent to simultaneous OIR of all SIPs.
Note The Cisco ASR 1002 and ASR 1002-F Routers come by default with 4-GB DRAM. The Cisco ASR 1001
Router comes by default with 4-GB DRAM, and is upgradeable up to 8-GB or 16-GB DRAM.
This section explains how to upgrade subpackages on a Cisco ASR 1001, Cisco ASR 1001-X, Cisco
ASR1002, Cisco ASR 1002-X, or Cisco ASR 1004 Router. It contains the following sections:
• Configuring SSO on a Cisco ASR 1001, Cisco ASR 1001-X, Cisco ASR 1002, Cisco ASR 1002-X,
or Cisco ASR 1004 Router, page 5-74
• Using Subpackages for Software Upgrade on a Cisco ASR 1001 Router, Cisco ASR 1001-X Router
or a Cisco ASR 1002-X Router, page 5-76
• Using Subpackages for Software Upgrade on a Cisco ASR 1002 Router or Cisco ASR 1004 Router
(software upgrade Command Set), page 5-91
• Using Subpackages for Software Upgrade on a Cisco ASR 1002 Router or Cisco ASR 1004 Router
(request platform Command Set), page 5-121
Configuring SSO on a Cisco ASR 1001, Cisco ASR 1001-X, Cisco ASR 1002, Cisco ASR 1002-X, or Cisco
ASR 1004 Router
The following instructions show how to configure SSO on a Cisco ASR 1001, Cisco ASR 1001-X, Cisco
ASR 1002, Cisco ASR 1002-X, and Cisco ASR 1004 Routers. The standby IOS process is created
automatically as part of these configuration steps.
Step 1 (Optional) Enter the show version command to confirm the amount of DRAM on your router:
Router# show version
<some output removed for brevity>
32768K bytes of non-volatile configuration memory.
4194304K bytes of physical memory.
921599K bytes of eUSB flash at bootflash:.
39004543K bytes of SATA hard disk at bootflash:.
Configuration register is 0x2102
In the example show version output, the router has 4 GB of DRAM memory.