E3Switch DS3 Operating Information Manual - page 8
Chapter 4: Remote Management HTTP and SNMP
Chapter 4: Remote Management HTTP and SNMP
Gateways contain both an HTTP management interface, which may be accessed via a web browser, and an
SNMPv2c agent.
Unit's IP/MAC Address
The source Ethernet MAC address of E3Switch gateways is 00:50:C2:6F:xx:xx. The gateway's current IP
and MAC addresses are always both shown at the HTTP management screen.
The gateway's management interface can be initially contacted at either its automatic link-local IP address
e3switch.local as described below or at its initial numeric IP address described below. Note that after initial
setup, an operator may have changed the contact IP address to a new value and the initial addresses below
may not work. Prior to operator reconfiguration the unit will respond to HTTP, SNMP and ping requests to
its initial IP address.
For initial communication with the gateway, it may be necessary to set the network address of the host port
communicating with the gateway to 169.254.xxx.xxx with subnet mask 255.255.0.0. Security protocols
advise routers not to forward packets with these link-local IP addresses, so a direct connection is advised.
Once initial contact has been established with the HTTP management interface of the gateway, the
gateway's IP address can be set to a new, static value if desired.
If a unit's operator-configured IP address is lost or forgotten, it can be recovered as described later in this
chapter.
Other than the e3switch.local addresses described below, all IP addresses used within the gateway's
management interface must be in xxx.xxx.xxx.xxx numeric format rather than a human-readable DNS-
resolvable hostname.
Automatic Link-Local IP Address
E3Switch products are shipped with an initial IP address that conforms to recent zero-configuration link-
local standards. This allows multiple E3Switch gateways on the same IP network to initialize with unique
IP addresses without conflict and allows simple ping/HTTP/SNMP access to the gateways using hostnames
e3switch.local or e3switch-2.local,... provided that, free,
ZeroConf
mDNS software has been installed on
the machine attempting to communicate with the gateway. Do not prefix www. prior to e3switch.local.
www.e3switch.local will not work.
If powered-up on a connected LAN, the gateways negotiate between themselves to determine which
gateway is assigned name e3switch.local and which receives e3switch-2.local and so on. Since the assigned
name will not necessarily be fixed to a particular gateway after power cycles, the system manager will
probably want to use/set the gateway's numeric IP address sometime during or after initial installation.
Web descriptions are available for
ZeroConf
mDNS and
Link-local
IPV4LL ip addresses. Free ZeroConf
software such as
Bonjour for Windows
or Avahi is available for Windows/Linux/Unix machines.
Initial Numeric IP Address
The gateway can also be contacted at its initial default IP numeric address which always takes the form
169.254.aa.bbb. Units typically have the initial IP address listed on top of the chassis or can be initially
contacted at the IP address above where aa.bbb matches the serial number listed on the front label.
The gateway's current IP and MAC addresses are both shown at the HTTP management screen.
Unknown IP Address Recovery
8