Ptp Grandmaster - Spectracom SecureSync User Reference Manual

5.5 Network Interface Option Cards
Eth0 is the built-in SecureSync Ethernet port. Eth1 through eth3 are the ports provided by the
1204-06 card.
For information on managing Ethernet on SecureSync, see "Configuring Ethernet" on page 46.
5.5.1.3 Routing Tables
There are five (5) routing tables in the system: one for each network interface, and one main routing
table.
Main Routing Table : This routing table is used when network traffic is generated from the
server. It will generally have the same default gateway as the routing table for eth0 , unless
configured otherwise.
Interface Routing Tables : These routing tables are specific to each interface. They are
named t0 (for eth0 interface) though t3 (for eth3 interface).
The system is configured by default with rules to use the individual routing table for each
interface for all network traffic being received or transmitted from or to the corresponding
interface. For example, when an NTP request is received on interface eth2 , it is tagged as
such and the response will use routing table t2 when sending the NTP response packet.
Each routing table has a default gateway that is used when there is no explicit routing table
entry that matches the destination address for a given network packet.
For information on configuring routing tables see "Adding Static Routes to the Routing Table" on
page 54, and see Spectracom Tech Note
Domains and Domain Name Servers (DNS)
Each network interface may exist on a separate domain and therefore have a different domain
name and domain name servers from the other interfaces.
The system supports a single domain name and up to 2 DNS addresses per network interface.
These may be assigned via DHCP or configured manually via the Web UI configuration screen for
each network interface.
Configuring Ethernet Ports
For information on configuring Ethernet ports, see "Configuring Network Ports" on page 48.
5.5.2

PTP Grandmaster [1204-32]

Precision Time Protocol (PTP) is a protocol that can be used to synchronize computers on an Eth-
ernet network. The Precision Time Protocol (PTP) option module supports PTP Version 2, as spe-
cified in the IEEE 1588-2008 standard (PTP Version 1 is not supported), via one (1) Ethernet port.
The PTP option module implements a PTP Ordinary Clock that can be configured to run as a
Master Clock only. It transmits PTP packets via the Ethernet port, with information about the cur-
rent time and synchronization reference selected by the SecureSync device.
388
Routing of Data with Multiple Networks
CHAPTER •
5 SecureSync User Reference Guide Rev. 18
.