Cisco Cisco Packet Data Gateway (PDG)
C H A P T E R
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Sample L2 Interchassis HA Configuration
This chapter provides a sample interchassis wsg-service High Availability (HA) configuration for SecGW
functionality between four VPC-VSM instances (StarOS VMs) running on VSMs in separate ASR 9000
chassis.
functionality between four VPC-VSM instances (StarOS VMs) running on VSMs in separate ASR 9000
chassis.
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Configuration Overview
Interchassis Layer 2 redundancy supports hot standby redundancy between two VPC-VSM instances in
different ASR 9000 chassis. The standby instance is ready to become active once a switchover is triggered.
SA re-negotiation is not required and traffic loss is minimal.
different ASR 9000 chassis. The standby instance is ready to become active once a switchover is triggered.
SA re-negotiation is not required and traffic loss is minimal.
The route database on the standby VSM must contain only the routes that were successfully injected by the
active VSM.
active VSM.
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.
one-to-one mapping between StarOS VMs across active/standby VSMs in different ASR 9000 chassis. See
the table below.
Table 4: Recommended Mapping of Interchassis StarOS VMs
Standby VSM
Active VSM
VM1 – SecGW1
VM1 – SecGW1
VM2 – SecGW2
VM2 – SecGW2
VM3 – SecGW3
VM3 – SecGW3
VM4 – SecGW4
VM4 – SecGW4
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.
so that switchover of one VM will not affect the other VMs.
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