Xiaguang XP XG2045 Manual page 37

ADSL2+ Tester
Config". And then you can use "F1", "F2", "F3" and "F4" softkeys to choose the
parameters.
S ett in g s
F un ct ion
D ST
D N S
P rot oc ol
P a cke t L e ng t h
i
Fig 14: Page 1 of "WAN PING" settings menu (MER)
e. IPoA settings menu
• Protocol Overview
IP over ATM, this protocol describes the ATM call control signaling exchanges needed
to support Classical IP over ATM implementations as described in RFC1577 [LAUB94].
ATM endpoints will incorporate ATM signaling services as specified in the ATM Forum
User-Network Interface (UNI) Specification Version 3.1 [ATMF94]. IP over ATM
implementations utilize the services of local ATM signaling entities to establish and
release ATM connections. This protocol should be used to define the support required
by IP over ATM implementations from their local ATM signaling entities.
The base protocol is defined in RFC 1577.
• "WAN PING" settings menu (PPPoA)
Refer to "WAN PING" settings menu (MER).
4.2.6 "TRACE" settings menu
The traceroute command is used to discover the routes that packets actually take when
traveling to their destination. The device (for example, a router or a PC) sends out a
sequence of User Datagram Protocol (UDP) datagrams to an invalid port address at the
remote host. Three datagrams are sent, each with a Time-To-Live (TTL) field value set to
one. The TTL value of 1 causes the datagram to "timeout" as soon as it hits the first router
in the path; this router then responds with an ICMP Time Exceeded Message (TEM)
indicating that the datagram has expired. Another three UDP messages are now sent,
each with the TTL value set to 2, which causes the second router to return ICMP TEMs. This
process continues until the packets actually reach the other destination. Since these
datagrams are trying to access an invalid port at the destination host, ICMP Port
Unreachable Messages are returned, indicating an unreachable port; this event signals
the Traceroute program that it is finished.
72-0046-03A
P : 1 / 2
[ P ING ]
[ IP ]
Connecting......
ME R
I PO A
1 0 :3 0 : 00
[ WAN P ING ]
[ 2 0 2 . 0 9 6 . 1 3 1 . 0 0 7 ]
[ 2 0 2. 0 9 6. 1 3 4. 1 3 3 ]
[M ER
[ 56]bytes
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4 Navigating the Displays
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