F_TX_only1st - Reassembly Time Exceeded (Time Exceeded (Global), Only First Fragment Received)
Host and Router
Common Test Setup 1.1
Verify that a node takes the proper actions when th reassembly time has been exceeded for a packet.
TN NUT
| |
|-------------------------->|
| Echo Request (1st) |
| |
| |
| wait for 65 sec. |
| |
| |
|<--------------------------|
| ICMP Error |
| |
| |
v v
1. TN transmits 1st Fragments.
2. Observe the packets transmitted by the NUT.
Echo Request Data (original) is:
IPv6 Header
Version = 6
Traffic Class = 0
FlowLabel = 0
PayloadLength = 88
NextHeader = 58 (ICMPv6)
SourceAddress = TN Global Address
DestinationAddress = NUT Global Address
ICMP Echo Request
Type = 128 (Echo Request)
Code = 0
Checksum = (auto)
Identifier = (auto)
SequenceNumber = 0
PayloadData = data repeat{0x1, 40}
data repeat{0x2, 40}
Echo Request Data (1st fragment) is:
IPv6 Header
Version = 6
Traffic Class = 0
FlowLabel = 0
PayloadLength = 40
NextHeader = 44 (Fragment Header)
SourceAddress = TN Global Address
DestinationAddress = NUT Global Address
Fragment Header
NextHeader = 58 (ICMPv6)
FragmentOffset = 0
MFlag = 1
Identification = 32bit (Automatic generation)
Payload
data = 32 octets from the head of ICMP Echo request
PASS: The NUT must not transmit an Echo Reply to TN, as the Echo Request was not completed.
The NUT should transmit an ICMPv6 Time Exceeded Message to TN
sixty seconds after reception of 1st Fragment
with a code field value of 1(Fragment Reassembly Time Exceeded).
- The unused field must be initialized to zero.
- The Source Address of the Packet must be the same as the Global
Destination Address of TN's Echo Request packet.
- The Destination Address should be the same as the Global
Source Address of TN's Echo Request packet.
- The invoking Echo Request packet included in the Error
Message must not exceed minimum IPv6 MTU.
IPv6 Header
Version = 6
Traffic Class = 0
FlowLabel = 0
PayloadLength = 88
NextHeader = 58 (ICMPv6)
SourceAddress = NUT Global Address
Destination Address = TN Global Address
ICMP Echo Reply
Type = 3 (Time Exceeded)
Code = 1 (Fragment reassembly time exceeded)
Checksum = (auto)
Reserved = 0
PayloadData = (Sent Packet (1st))
Common Test Cleanup
perldoc V6evalTool