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Dual Trunk E1 Router
Dual Trunk E1 Router User’s Guide TECHNICAL: 0118 96 56 000 79
ROUTING MONITORING
The Dual Trunk E1 Router collects statistics on the following:
• Ethernet physical layer
• Data ethernet
• IP MIB Statistics
DELAY MONITORING
The delay monitoring feature in the Dual Trunk E1 Router provides network delay measurement
between the Dual Trunk E1 Router and any device on the network. The LRU4240 measures delay
by using a ping protocol. As part of the pattern generation and packet sequencing, delay
measurement will use the ping packet to timestamp and obtain round-trip delays to specific IP
addresses. This method can measure the delay to any device that implements the TCP/IP protocol,
not just to BlackBox units. The traffic added to support the measurement is minimal, and the user
can configure traffic frequency. The length of the ping packet can allow delay measurements in
different frame sizes. A user who is concerned about bandwidth utilization by the measure can
configure the test for a single short ping every few minutes, making the test bandwidth penalty
virtually non-existent.
The link-based testing and delay monitoring features allow network managers to test network links,
as well as quantify the network delay, and are especially useful during network installation and
trouble isolation. Both features provide the benefit of circuit level testing across the network.
Menu-9C allows you to configure the Dual Trunk E1 Router for delay monitoring. The results of the
test are displayed in Menu-3M.
Table 9-3 Routing Report Menus
Menu Screen Description
3FA - Ethernet physical layer Displays the ethernet protocol statistics which includes FCS errors, total
single collision frames, total number of deferred transmissions, total
number of late collisions, total number of carrier sense errors, and total
number of frames received that are too long.
3FB - Ethernet interface statistics Displays data ethernet statistics which include totals for octets
received/transmitted, unicast packets received/transmitted, non unicast
packets received/transmitted, number of packets received with unknown
protocol IDs, RX packets received with Ethernet errors, and non-routable
RX packets received.
3FC - IP statistics Displays IP MIB statistics including: totals packets received
3FE - ICMP Receive statistics Displays performance data for every 15-minute interval in the last 4
days. (
up to 32 screens)
3FF - ICMP Transmit statistics Displays performance data totals for each day, for the last 14 days
3FG - ARP statistics Displays performance data uptime totals for the NET1, NET2, and
aggregate network port