Cisco IE 4000, Software Configuration Manual

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932
Configuring IPv6 Unicast Routing
Information About IPv6
SNMP and Syslog Over IPv6
To support both IPv4 and IPv6, IPv6 network management requires both IPv6 and IPv4 transports. Syslog over IPv6
supports address data types for these transports.
SNMP and syslog over IPv6 provide these features:

Support for both IPv4 and IPv6

IPv6 transport for SNMP and to modify the SNMP agent to support traps for an IPv6 host

SNMP- and syslog-related MIBs to support IPv6 addressing

Configuration of IPv6 hosts as trap receivers
For support over IPv6, SNMP modifies the existing IP transport mapping to simultaneously support IPv4 and IPv6. These
SNMP actions support IPv6 transport management:

Opens User Datagram Protocol (UDP) SNMP socket with default settings

Provides a new transport mechanism called SR_IPV6_TRANSPORT

Sends SNMP notifications over IPv6 transport

Supports SNMP-named access lists for IPv6 transport

Supports SNMP proxy forwarding using IPv6 transport

Verifies SNMP Manager feature works with IPv6 transport
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.
Unsupported IPv6 Unicast Routing Features

IPv6 policy-based routing

IPv6 virtual private network (VPN) routing and forwarding (VRF) table support

Support for 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