Configuring Secure Domain Routers on Cisco IOS XR Software
Information About Configuring Secure Domain Routers
High Availability Implications
Fault Isolation
Because the CPU and memory of an SDR are not shared with other SDRs, configuration problems that cause
Rebooting an SDR
Each
Note The DSDRSC of the owner SDR is also the DSC of the entire system.
DSDRSC Redundancy
To achieve full redundancy, each SDR must be assigned two cards: one to act as the primary DSDRSC, and one RP or DRP to act as a standby DSDRSC.
In a Cisco XR 12000 Series Router, you can assign two redundant RP cards to each SDR as described in the “DSC and DSDRSCs in a Cisco XR 12000 Series Router” section on page
In a Cisco
DSC Migration on Cisco CRS-1 Multishelf Systems
Designated Shelf Controller (DSC) migration is the act of moving the DSC role to a different part of the router. The DSC role automatically migrates when the DSC cannot perform its function on the shelf in which it currently resides. The cause of a DSC migration can be a failure of both of the RPs in the DSC shelf or any event that removes power from the DSC line card chassis (LCC).
DSC migration can be triggered by the following methods:
1.Shutdown power to DSC LCC. (Recommended)
2.
3.Online, insertion, removal (OIR) for an active RP and standby RP in a DSC LCC simultaneously. (Not recommended)
4.Removal of control Ethernet connectivity to both RPs in a DSC LCC. (Not recommended)
Note If planned downtime of a DSC LCC occurs, the recommended method of triggering DSC migration is to shutdown the power to the DSC LCC. The methods, which are not recommended, shutdown only one transport medium in the system. For example, control Ethernet but fabric medium can still be up for
Cisco IOS XR System Management Configuration Guide
