Http(S) Over Ipv6; Unsupported Ipv6 Unicast Routing Features; Limitations - Cisco ME 3400 Software Configuration Manual

Chapter 36 Configuring IPv6 Unicast Routing
For more information about EIGRP for IPv6, see the "Implementing EIGRP for IPv6" chapter in the
Cisco IOS IPv6 Configuration Library on Cisco.com.

HTTP(S) Over IPv6

The HTTP client sends requests to both IPv4 and IPv6 HTTP servers, which respond to requests from
both IPv4 and IPv6 HTTP clients. URLs with literal IPv6 addresses must be specified in hexadecimal
using 16-bit values between colons.
The accept socket call chooses an IPv4 or IPv6 address family. The accept socket is either an IPv4 or
IPv6 socket. The listening socket waits for both IPv4 and IPv6 signals that indicate a connection. The
IPv6 listening socket is bound to an IPv6 wildcard address.
The underlying TCP/IP stack supports a dual-stack environment. HTTP relies on the TCP/IP stack and
the sockets for processing network-layer interactions.
Basic network connectivity (ping) must exist between the client and the server hosts before HTTP
connections can be made.
For more information, see the "Managing Cisco IOS Applications over IPv6" chapter in the Cisco IOS
IPv6 Configuration Library on Cisco.com.

Unsupported IPv6 Unicast Routing Features

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Limitations

Because IPv6 is implemented in switch hardware, some limitations occur due to the IPv6 compressed
addresses in the hardware memory. This results in some loss of functionality and some feature
limitations.
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OL-9639-07
IPv6 policy-based routing
IPv6 virtual private network (VPN) routing and forwarding (VRF) table support
Support for IPv6 routing protocols: multiprotocol Border Gateway Protocol (BGP) and Intermediate
System-to-Intermediate System (IS-IS) routing
IPv6 packets destined to site-local addresses
Tunneling protocols, such as IPv4-to-IPv6 or IPv6-to-IPv4
The switch as a tunnel endpoint supporting IPv4-to-IPv6 or IPv6-to-IPv4 tunneling protocols
IPv6 unicast reverse-path forwarding
IPv6 general prefixes
HSRP for IPv6
SNMP and Syslog over IPv6
When using user-network interface (UNI) or enhanced network interface (ENI) ports for any
IPv6-related features, you must first globally enable IP routing and IPv6 routing on the switch by
entering the ip routing and ipv6 unicast-routing global configuration commands even if you are
not using IPv6 routing.
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
Understanding IPv6
36-7