Black Box LRU4240 manual Routing Monitoring, Delay Monitoring

Dual Trunk E1 Router

ROUTING MONITORING

The Dual Trunk E1 Router collects statistics on the following:

•Ethernet physical layer

•Data ethernet

•IP MIB Statistics

	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

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.

Dual Trunk E1 Router User’s Guide TECHNICAL: 0118 96 56 000 79