Cisco Cisco Packet Data Interworking Function (PDIF)
Reverse Route Injection
High Availability for RRI ▀
SecGW Administration Guide, StarOS Release 18 ▄
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L3-based HA SecGW deployment uses the onePK Routing Service Set (RSS) infrastructure to support geo-
redundancy. It does this by inserting the necessary routes on the ASR 9000 RSP. The RSP then distributes the
relevant routes outwardly such that external traffic would reach the active VSM instead of the standby VSM.
relevant routes outwardly such that external traffic would reach the active VSM instead of the standby VSM.
For Layer 3 redundancy, the routes are injected via IOS-XR as two legs. Only the first leg of the routes is
injected to IOS-XR running on the chassis with the standby VSM. The small set of secondary leg routes are
reconfigured to point to the newly active VSM after the switchover.
reconfigured to point to the newly active VSM after the switchover.
For additional information on StarOS ICSR, see the VPC-VSM System Administration Guide.
Mapping of VPC-VSM Instances between VSMs
Because of the asymmetric assignment of VSM resources among StarOS VMs, an operator should configure one-to-one
mapping between StarOS VMs across active/standby VSMs in different ASR 9000 chassis. See the table below.
mapping between StarOS VMs across active/standby VSMs in different ASR 9000 chassis. See the table below.
Table 3. Recommended Mapping of Interchassis StarOS VMs
Active VSM
Standby VSM
VM1
VM1
VM2
VM2
VM3
VM3
VM4
VM4
Each VM will be monitored via separate HSRP configurations and connected to separate oneP (CA) sessions so that
switchover of one VM will not affect the other VMs.
switchover of one VM will not affect the other VMs.
RRI Configuration Commands
There are several StarOS CLI commands associated with RRI configurations. They are briefly described below. For
additional information, see the Command Line Interface Reference.
additional information, see the Command Line Interface Reference.
Important:
You must separately configure RRI on each StarOS VM (VPC-VSM instance).
ip/ipv6 rri Command
This Context Configuration mode CLI command configures Reverse Route Injection egress clear port IP parameters.
This command is supported for both Remote Access Service and S2S configurations.
This command is supported for both Remote Access Service and S2S configurations.
configure
context context_name
{ ip | ipv6 } rri { ip_address | next-hop nexthop_address } interface
interface_name [ vrf vrf_name ]
interface_name [ vrf vrf_name ]
Notes: