Cisco Catalyst 2960 Series, Configuration Manual

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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
For information on SNMP over IPv6, including configuration procedures, see the
“
Managing Cisco IOS
Applications over IPv6 ” chapter in the Cisco IOS IPv6 Configuration Library on Cisco.com.
For information about syslog over IPv6, including configuration procedures, see the “ Implementing IPv6
Addressing and Basic Connectivity
”
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 continues to listen 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.
IPv6 and Switch Stacks
The switch supports IPv6 forwarding across the stack and IPv6 host functionality on the stack master. The
stack master runs IPv6 host functionality and IPv6 applications.
While the new stack master is being elected and is resetting, the switch stack does not forward IPv6 packets.
The stack MAC address changes, which also changes the IPv6 address. When you specify the stack IPv6
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
189
Information About Configuring IPv6 Host Functions