HP 6120XG HP ProCurve Series 6120 Blade Switches IPv6 Configuration Guide - Page 35
IP Preserve, Web Browser Interface, Path MTU (PMTU) Discovery, Configurable IPv6 Security
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Introduction to IPv6 Configurable IPv6 Security IP Preserve IP Preserve operation preserves both the IPv4 and IPv6 addresses configured on VLAN 1 (the default VLAN) when a configuration file is downloaded to the switch using TFTP. Refer to "IP Preserve for IPv6" on page 5-23. Web Browser Interface For the web browser interface, the software adds the following IPv6 functionality: ■ configure and display IPv6 addressing ■ ping6 diagnostic operation Path MTU (PMTU) Discovery IPv6 PMTU operation is managed automatically by the IPv6 nodes between the source and destination of a transmission. For Ethernet frames, the default MTU is 1500 bytes. If a router on the path cannot forward the default MTU size, it sends an ICMPv6 message (PKT_TOO_BIG) with the recommended MTU to the sender of the frame. If the sender of the frame is an IPv6 node that supports PMTU discovery, it will then use the MTU specified by the router and cache it for future reference. For related information, refer to: ■ RFC 1981: "Path MTU Discovery for IP version 6" Configurable IPv6 Security This section outlines the configurable IPv6 security features supported in the software. SSHv2 on IPv6 SSHv2 provides for the authentication between clients and servers, and protection of data integrity, and privacy. It is used most often to provide a secure alternative to Telnet and is also used for secure file transfers (SFTP and SCP). SSH functionality is supported on ProCurve switches running either IPv4 or IPv6. When SSH operation is enabled (the default setting), it automatically runs for both IPv4 and IPv6 traffic. 2-11