What is dual IOS mode on the Cisco ASR 1001 Router?
A.
redundant IOS processes that are running on the active RP and standby RP
B.
active and standby IOS processes that are running on a single RP
C.
separate Cisco IOS XE and IOS XR processes that are running on a single RP
D.
separate Cisco IOS XE and IOS XR processes that are running on two different RPs
E.
checkpointed redundant IOS processes that are running on two different RPs in active/active
mode
Explanation:
Dual IOS Processes
The Cisco ASR 1000 Series Router introduces a dual IOS process model that allows for increased high availability at all times. Using SSO or RPR, a second IOS process can be enabled on a Cisco ASR 1002 or 1004 Router. On Cisco ASR 1000 Series Routers configured with dual Route Processors, the second IOS process runs on the standby Route Processor.
Software Upgrade with Dual IOS Processes on a Single RP Overview
To complete a software upgrade of an individual subpackage using dual IOS processes on a single RP, SSO must first be enabled. Software upgrade with dual IOS processes is useful for upgrading the individual RP subpackages that can be upgraded without a router reload. Importantly, note that most subpackage upgrades in a single RP configuration require a hardware reload to complete (whether an RP reload for an RP subpackage, an ESP reload for the ESPBase subpackage, a SIP reload for a SIPBase subpackage, or a SPA reload for the SIPSPA subpackage), so limited interruption upgrades for single RP configurations are not available in most upgrade scenarios.
http://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asrswcfg.pdf
0
0
B.
active and standby IOS processes that are running on a single RP
0
0