Cisco Cisco Expressway Maintenance Manual
Network and System Settings
This section describes network services and settings related options that appear under the System menu of the web
interface. These options enable you to configure the Expressway in relation to the network in which it is located, for
example its IP settings, firewall rules, intrusion protection and the external services used by the Expressway (for
example DNS, NTP and SNMP).
interface. These options enable you to configure the Expressway in relation to the network in which it is located, for
example its IP settings, firewall rules, intrusion protection and the external services used by the Expressway (for
example DNS, NTP and SNMP).
Network Settings
Configuring Ethernet Settings
Use the Ethernet page (System > Network interfaces > Ethernet) to configure the speed of the connections between
the Expressway and the Ethernet networks to which it is connected. The speed and duplex mode must be the same at
both ends of the connection. If you installed the Advanced Networking option, you can configure the speed and
duplex mode for each Ethernet port.
the Expressway and the Ethernet networks to which it is connected. The speed and duplex mode must be the same at
both ends of the connection. If you installed the Advanced Networking option, you can configure the speed and
duplex mode for each Ethernet port.
The default Speed is Auto, which means that the Expressway and the connected switch will automatically negotiate
the speed and duplex mode.
the speed and duplex mode.
Note:
We recommend Auto unless the connected switch is unable to auto-negotiate. A mismatch in speed/duplex
mode between the two ends of the connection will cause packet loss and could make the system inaccessible.
Configuring IP Settings
The IP page (System > Network interfaces > IP) is used to configure the IP protocols and network interface settings
of the Expressway.
of the Expressway.
IP Protocol Configuration
You can configure whether the Expressway uses IPv4, IPv6 or Both protocols. The default is Both.
■
IPv4: it only takes calls between two endpoints communicating via IPv4. It communicates with other systems
via IPv4 only.
via IPv4 only.
■
IPv6: it only takes calls between two endpoints communicating via IPv6. It communicates with other systems
via IPv6 only.
via IPv6 only.
■
Both: it takes calls using either protocol. If a call is between an IPv4-only and an IPv6-only endpoint, the
Expressway acts as an IPv4 to IPv6 gateway. It communicates with other systems via either protocol.
Expressway acts as an IPv4 to IPv6 gateway. It communicates with other systems via either protocol.
All IPv6 addresses configured on the Expressway are treated as having a /64 network prefix length.
Cisco Systems, Inc.
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