Chapter 1: Introduction
4
APIPA and Link-Local Addressing
The EMX supports Automatic Private Internet Protocol Addressing
(APIPA) as of release 3.2.0.
With APIPA, your EMX automatically configures a link-local IP address
and a link-local host name when it cannot obtain a valid IP address from
any DHCP server in the TCP/IP network.
Only IT devices connected to
the same subnet
can access the EMX
using the link-local address/host name. Those in a different subnet
cannot access it.
Exception: The EMX in the Port Forwarding mode does not support
APIPA. See
Setting the Cascading Mode
(on page 136).
Once the EMX can get a DHCP-assigned IP address, it stops using
APIPA and the link-local address is replaced by the DHCP-assigned
address.
Scenarios where APIPA applies:
DHCP is enabled on the EMX, but no IP address is assigned to the
EMX.
This may be caused by the absence or malfunction of DHCP servers
in the network.
Note: Configuration by connecting the EMX to a computer using a
network cable is an application of this scenario. See
Connecting the
EMX to a Computer
(on page 11).
The EMX previously obtained an IP address from the DHCP server,
but the lease of this IP address has expired, and the lease cannot be
renewed, or no new IP address can be obtained.
Link-local addressing:
IPv4 address:
Factory default is to enable IPv4 only. The link-local IPv4 address is
169.254.x.x/16
, which ranges between 169.254.1.0 and
169.254.254.255.
IPv6 address:
A link-local IPv6 address is available only after IPv6 is enabled on
the EMX. See
Selecting the Internet Protocol
(on page 114).
Host name -
pdu.local
:
You can type
https://pdu.local
to access the EMX instead of typing
the link-local IP address.
Содержание EMX2-888
Страница 19: ...Chapter 1 Introduction 5 Retrieval of the link local IPv4 address See IPv4 Address on page 72...
Страница 71: ...Chapter 4 Connecting External Equipment Optional 57...
Страница 148: ...Chapter 6 Using the Web Interface 134 LHX 20 SHX 30 LHX 40 PowerLogic PM710...
Страница 506: ...Appendix F LDAP Configuration Illustration 492 5 Click OK The EMX_Admin role is created 6 Click Close to quit the dialog...
Страница 526: ...Appendix H RADIUS Configuration Illustration 512 Note If your EMX uses PAP then select PAP...
Страница 527: ...Appendix H RADIUS Configuration Illustration 513 10 Select Standard to the left of the dialog and then click Add...
Страница 528: ...Appendix H RADIUS Configuration Illustration 514 11 Select Filter Id from the list of attributes and click Add...
Страница 531: ...Appendix H RADIUS Configuration Illustration 517 14 The new attribute is added Click OK...
Страница 532: ...Appendix H RADIUS Configuration Illustration 518 15 Click Next to continue...