Operation Over A Common Ipv6 Network - Cisco ASR 5000 series Product Overview

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Packet Data Interworking Function Overview

When the ASR 5000 transitions from backup to primary, the PDIF sends Gratuitous ARPs to update the port-MAC table

of the adjacent switch.

Figure 125. Switchover Example for Common IPv4 Subnet

Operation Over a Common IPv6 Network

For AAA context with Diameter/SCTP/IPv6 configuration, multiple loopback IPv6 addresses are configured as

Diameter endpoints. The customer can SRP-activate these loopback addresses and, upon SRP switchover, the HSS/SLF

still sees the same Diameter peer endpoint. No new Diameter peer configuration to the HSS/SLF is required.

With SRP switchover operation in effect, the PDIF shuts down all the SCTP connections to the HSS/SLF. Then the

former backup PDIF immediately creates new SCTP connections with the HSS/SLF. In this reestablishment process, the

backup chassis sends an Unsolicited Neighbor Advertisement message to the adjacent switch, which is then used to

overwrite its port MAC address table as shown in the diagram below.

Features and Functionality - Licensed Enhanced Feature Support ▀

Cisco ASR 5000 Series Product Overview ▄