39-10
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02
Chapter39 Configuring IPv6 Unicast Routing
Configuring IPv6
Note An IPv4 route requires only one hardware entry. Because of the hardware compression scheme used fo r
IPv6, an IPv6 route can take more than one hardware entry, reducing the number of entries forwarded
in hardware. For example, for IPv6 directly connected IP addresses, the desktop template might allow
less than two thousand entries.
Table39-1 defines the approximate feature resources allocated by each new template. Template
estimations are based on a switch with eight routed interfaces and approx imately one thousand VLANs.
Configuring IPv6
These sections contain this IPv6 forwarding configuration information:
•Default IPv6 Configuration, page 39-11
•Configuring IPv6 Addressing and Enabling IPv6 Routing, page 39-11
•Configuring IPv4 and IPv6 Protocol Stacks, page 39-13
•Configuring IPv6 ICMP Rate Limiting, page 39-15
•Configuring CEF and dCEF for IPv6, page 39-15
•Configuring Static Routing for IPv6, page 39-16
•Configuring RIP for IPv6, page 39-18
•Configuring OSPF for IPv6, page 39-20
Table39-1 Approximate Feature Resources Allowed by Dual IPv4-IPv6 Templates
Resource
IPv4-and-IPv6
Default
IPv4-and-IPv6
Routing
IPv4-and-IPv6
VLAN
Unicast MAC addresses 2 K 1.5 K 8 K
IPv4 IGMP groups and multicast routes 1 K 1 K 1 K for IGMP
groups
0 for multicast
routes
Total IPv4 unicast routes: 3 K 2.75 K 0
•Directly connected IPv4 hosts 2 K 1.5 K 0
•Indirect IPv4 routes 1 K 1.25 K 0
IPv6 multicast groups 1 K 1 K 1 K
Directly connected IPv6 addresses 2 K 1.5 K 0
Indirect IPv6 unicast routes 1 K 1.25 K 0
IPv4 policy-based routing ACEs 0 0.25 K 0
IPv4 or MAC QoS ACEs (total) 0.5 K 0.5 K 0.5 K
IPv4 or MAC security ACEs (total) 1 K 0.5 K 1 K
IPv6 security ACEs 1 K 1 K 1 K