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 versions of the IP protocol suite. The default is
Both.
Both.
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IPv4 only: it only accepts registrations from endpoints using an IPv4 address, and only takes calls between two
endpoints communicating via IPv4. It communicates with other systems via IPv4 only.
endpoints communicating via IPv4. It communicates with other systems via IPv4 only.
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IPv6 only: it only accepts registrations from endpoints using an IPv6 address, and only takes calls between two
endpoints communicating via IPv6. It communicates with other systems via IPv6 only.
endpoints communicating via IPv6. It communicates with other systems via IPv6 only.
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Both: it accepts registrations from endpoints using either an IPv4 or IPv6 address, and 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.
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.
Some endpoints support both IPv4 and IPv6, however an endpoint can use only one protocol when registering with
the Expressway. Which protocol it uses is determined by the format used to specify the IP address of the Expressway
the Expressway. Which protocol it uses is determined by the format used to specify the IP address of the Expressway
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