Configuring The Ipv6 Prefix Length - Cisco SCE 8000 10GBE Software Configuration Manual

Configuring the IPv6 Prefix Length

Enter the Global Configuration mode:
Step 1
SCE8000# configure
Configure the IPv6 only mode:
Step 2
From the Global Configuration prompt, enter debug const db
seCommonConstDb.box.ipv6MappingsPercentage value 100 and press Enter.
Copy the running configuration to the startup configuration:
Step 3
SCE8000#> copy running-config startup-config
Reboot the Cisco SCE 8000 device.
To configure dual stack mode with a value 30 (other than the default value 20), follow these steps:
Enter the Global Configuration mode:
Step 1
SCE8000# configure
Configure the dual stack mode with value 30:
Step 2
From the Global Configuration prompt, enter debug const db
seCommonConstDb.box.ipv6MappingsPercentage value 30 and press Enter.
Copy the running configuration to the startup configuration:
Step 3
SCE8000#> copy running-config startup-config
Reboot the Cisco SCE 8000 device.
Step 4

Configuring the IPv6 Prefix Length

Cisco SCE 8000 devices identifies the IPv6 subscribers based on the MSB 64 bits of the subscriber IPv6
address. Cisco SCE 8000 devices support IPv6 subscribers with a range of /32 to /64 and not less than
/32.
You can configure the IPv6 prefix length using the const -db seCommonConstDb.box.
ipv6SystemPrefixLength command. The value of IPv6 prefix length can be between 32 and 64 and the
default value is 64. The changes will be effective only after you copy the running configuration to the
startup configuration and restart the device.
The Cisco SCE 8000 device restricts static subscriber configuration to use prefixes greater than 31. If
the Gx CCA-I reaches the device with a Framed-IPV6-Prefix with prefix delegation less than 32, it is
ignored and subscriber stays as anonymous.
To configure the IPv6 Prefix Length 48, follow these steps:
Enter the Global Configuration mode:
Step 1
SCE8000# configure
Configure the IPv6 prefix length:
Step 2
From the Global Configuration prompt, enter debug const-db name
seCommonConstDb.box.ipv6SystemPrefixLength value 48 and press Enter.
Cisco SCE 8000 10GBE Software Configuration Guide
3-18
Chapter 3 Basic Cisco SCE 8000 Platform Operations
OL-30621-02