Enable this flag to support IPv6 routes with prefix-lengths greater than 64 bits.
This flag is disabled by default. Use this procedure to enable (set to true) the IPv6-mode boot config flag.
When the IPv6-mode boot config flag is enabled, the maximum number of IPv4 routing table entries decreases. For scaling information, see VOSS Release Notes.
Note
Exception: not supported on VSP 4450 Series, VSP 8600 Series, and XA1400 Series.
enable
configure terminal
boot config flags ipv6-mode
show boot config flags