Cisco Systems 1000 Series Manual De Usuario

For the Cisco ASR 1000 Series Routers, ISSU-compatibility depends on the software subpackage being 
upgraded and the hardware configuration. Consolidated packages are ISSU-compatible in dual RP 
configurations only and have other limitations described later in this document. Some RP and ESP 
software subpackages can be upgraded in service even in single RP or ESP hardware configurations via 
dual IOS processes running on the RP; others require dual RP or ESP configurations for an ISSU 
upgrade. The SPA and SIP software subpackages must be upgraded on a per-SPA or per-SIP basis. See 

 to view an In Service table that addresses the contexts where limited interruption upgrades can 

be performed.

If you are updating multiple subpackages, you should also realize that the sequence of the upgrade is 
important to minimize router downtime for the software upgrade (see the 

). 

The specific procedures in this document represent supported and tested installation sequences. The 
Cisco IOS XE system software allows other installation sequences for special purposes under the 
guidance of Cisco customer support representatives, but the steps in this document should be followed 
otherwise. These steps should be followed completely, as the Cisco ASR 1000 Series Routers are 
designed to run one version of Cisco IOS XE for all consolidated packages and subpackages on an RP, 
and running subpackages from different versions of Cisco IOS XE can cause unexpected router behavior.

When performing ISSU upgrades on the Cisco ASR 1000 Series Routers, it is important to remember 
that minimal interruption upgrades can be performed using either the issu command set or the request 
platform command set, and that either command set can be used to perform limited interruption 
individual consolidated package or subpackage upgrades. 

ROMmon images are downloaded separately from Cisco IOS XE images and have their own installation 
procedures, and are therefore not mentioned as part in this document as part of the ISSU upgrade 
procedure.

 provides a list of the Cisco ASR 1000 Series Routers subpackages and whether or not they can 

be upgraded without losing any network traffic in single and dual RP and ESP configurations using 
ISSU.

Consolidated package (any)

No (Reload required)

Yes (RP switchover)

RPBase

No (RP Reload required)

Yes (RP switchover)

RPControl

Yes (in-service)

Yes (in-service)

RPAccess

Yes (in-service)

Yes (in-service)

RPIOS

Yes

1

 (IOS software switchover)

Yes (RP switchover)

ESPBase

No

2

 (ESP reload required)

Yes

3

 (via ESP switchover)

ESPX86Base

No

4

 (ESP reload required)

Yes

5

 (via ESP switchover)

SIPBase

6

No (SPAs in SIP do not forward 
traffic during upgrade)

Yes (With Minimal Disruptive 
Restart (MDR), traffic is
forwarded with minimal

interruption)