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HP-UX IPv6 Transport Administrator's Guide for TOUR 2.0: HP-UX 11i v1 > Chapter 1 Features Overview

Known Problems and Limitations

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The following section describes known problems and limitations of HP-UX 11i v1 TOUR 2.0 transport.

Known Problems

This section contains information about a known problem in HP-UX 11i v1 TOUR 2.0.

  • Socket Caching and IPv6 Usage

    Problem: When socket caching is enabled, applications opening an IPv6 socket may get an IPv4 socket, which will result in an IPv6 ioctl() failure.

    Workaround: If you need to use IPv6, use ndd to completely disable socket caching.

    Resolution: This will be addressed in a subsequent TOUR patch or release.

Limitations

The following limitations exist for HP-UX 11i v1 TOUR 2.0.

Multihomed Host Limitation

In the absence of a router that is advertising prefixes, no more than one interface can be configured with IPv6 addresses on a host with multiple physical network interfaces. If multiple physical interfaces are configured with IPv6 addresses, and if there is no Router Advertisement received on any interfaces, the host has no way of knowing which interface to send packets out on. If packets are sent out on the interface that is on a different link than the destination node, then communication will fail. This configuration is neither recommended nor supported.

Distributed File System Limitations

NIS+, NIS, and NFS are currently not supported over IPv6.

setparms Not Enhanced for IPv6 Configuration

The setparms utility has not been enhanced to support IPv6 configuration.

The who -R, last -R, finger -R Commands Limitations

The who -R, last -R, and finger -R commands have not been enhanced for IPv6. Thus, the following cases are observed when using these commands:

  • The who -R and last -R commands output displays a truncated IP address when IPv6 on TOUR 2.0 is installed and the user logs in remotely using an IP address instead of a hostname.

  • The finger -R command output displays a local host name, not the remote host name, when IPv6 included in TOUR 2.0 is installed.

SAM Limitation

SAM has not been enhanced to support the tunneling enhancements available with TOUR 2.0. TOUR 2.0 tunneling configuration must be done by editing the /etc/rc.config.d/netconf-ipv6 file or by using the ifconfig command.

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