REASSEMBLY
Purpose
This report shows the packets that were reassembled. Use the REASSEMBLY(DETAIL) option to see all the packets that were reassembled. If the reassembled packets are larger than 32K then use REASSEMBLY(nnnnn), where nnnnn is the maximum size of a reassembled packet.
Format
CTRACE COMP(SYSTCPDA) SUB((TCPCS)) SHORT OPTIONS((REASSEMBLY(DETAIL) STAT)) 1 Reassembly of: 9.67.113.65-0 9.27.11.173-0 Id: 0043 status: +Fis +Lis
2 Rcd Nr Time Delta Offset Length Next Gap Data Flags
1638 15:28:49.975479 00:00:00.000000 0 3976 3976 0 3976 Fis
1639 15:28:49.975501 00:00:00.000022 3976 3976 7952 0 3976 Mis
1640 15:28:49.975524 00:00:00.000044 7952 3976 11928 0 3976 Mis
1641 15:28:49.975545 00:00:00.000066 11928 3976 15904 0 3976 Mis
1642 15:28:49.975567 00:00:00.000088 15904 3976 19880 0 3976 Mis
1643 15:28:49.975594 00:00:00.000115 19880 3976 23856 0 3976 Mis
1644 15:28:49.975620 00:00:00.000141 23856 3976 27832 0 3976 Mis
1645 15:28:49.975689 00:00:00.000210 27832 3976 31808 0 3976 Mis
1646 15:28:49.975737 00:00:00.000258 31808 3976 35784 0 3976 Mis
1647 15:28:49.975771 00:00:00.000292 35784 3976 39760 0 3976 Mis
1648 15:28:49.975804 00:00:00.000325 39760 3976 43736 0 3976 Mis
1649 15:28:49.975835 00:00:00.000356 43736 3976 47712 0 3976 Mis
1650 15:28:49.975865 00:00:00.000386 47712 3976 51688 0 3976 Mis
1651 15:28:49.975898 00:00:00.000419 51688 3976 55664 0 3976 Mis
1652 15:28:49.975926 00:00:00.000447 55664 3976 59640 0 3976 Mis
1653 15:28:49.975962 00:00:00.000483 59640 3976 63616 0 3976 Mis
1654 15:28:49.975986 00:00:00.000507 63616 392 64008 0 392 Lis
64,008 bytes is the final length of the IP packet
17 packets were used for reassembly
64,008 bytes were accumulated for reassembly
=============================================================================== 3 Packet Reassembly Report
Maximum reassembly buffer size is 65535
4 Reassembly of: 9.27.11.173-0 9.67.113.65-0 Id: 3694 status: +Fis +Lis
Rcd Nr Time Delta Offset Length Next Gap Data Flags
1655 15:28:50.024685 00:00:00.000000 0 1480 1480 0 1480 Fis
1656 15:28:50.024705 00:00:00.000019 1480 1480 2960 0 1480 Mis
1657 15:28:50.024739 00:00:00.000053 2960 1480 4440 0 1480 Mis
1658 15:28:50.024772 00:00:00.000086 4440 1480 5920 0 1480 Mis
1659 15:28:50.025506 00:00:00.000820 5920 1480 7400 0 1480 Mis
1660 15:28:50.030534 00:00:00.005848 7400 1480 8880 0 1480 Mis
1661 15:28:50.030592 00:00:00.005906 8880 1480 10360 0 1480 Mis
1662 15:28:50.030607 00:00:00.005921 10360 1480 11840 0 1480 Mis
1663 15:28:50.030650 00:00:00.005964 11840 1480 13320 0 1480 Mis
1664 15:28:50.030683 00:00:00.005997 13320 1480 14800 0 1480 Mis
1665 15:28:50.030698 00:00:00.006012 14800 1480 16280 0 1480 Mis
1666 15:28:50.042927 00:00:00.018241 16280 1480 17760 0 1480 Mis
1667 15:28:50.042946 00:00:00.018261 17760 1480 19240 0 1480 Mis
1668 15:28:50.043006 00:00:00.018320 19240 1480 20720 0 1480 Mis
1669 15:28:50.043021 00:00:00.018335 20720 1480 22200 0 1480 Mis
1670 15:28:50.043058 00:00:00.018372 22200 1480 23680 0 1480 Mis
1671 15:28:50.043114 00:00:00.018428 23680 1480 25160 0 1480 Mis
1672 15:28:50.043130 00:00:00.018444 25160 1480 26640 0 1480 Mis
1673 15:28:50.043174 00:00:00.018488 26640 1480 28120 0 1480 Mis
1674 15:28:50.043222 00:00:00.018536 28120 1480 29600 0 1480 Mis
1675 15:28:50.043257 00:00:00.018571 29600 1480 31080 0 1480 Mis
1676 15:28:50.043544 00:00:00.018858 31080 1480 32560 0 1480 Mis
1677 15:28:50.043592 00:00:00.018906 32560 1480 34040 0 1480 Mis
1678 15:28:50.043607 00:00:00.018921 34040 1480 35520 0 1480 Mis
1679 15:28:50.044618 00:00:00.019932 35520 1480 37000 0 1480 Mis
1680 15:28:50.044649 00:00:00.019963 37000 1480 38480 0 1480 Mis
1681 15:28:50.044698 00:00:00.020012 38480 1480 39960 0 1480 Mis
1682 15:28:50.044712 00:00:00.020026 39960 1480 41440 0 1480 Mis
1683 15:28:50.044745 00:00:00.020059 41440 1480 42920 0 1480 Mis
1684 15:28:50.044778 00:00:00.020092 42920 1480 44400 0 1480 Mis
1685 15:28:50.050178 00:00:00.025492 44400 1480 45880 0 1480 Mis
1686 15:28:50.050212 00:00:00.025527 45880 1480 47360 0 1480 Mis
1687 15:28:50.050244 00:00:00.025558 48840 1480 50320 -1480 1480 Mis
1688 15:28:50.050275 00:00:00.025589 50320 1480 51800 0 1480 Mis
1689 15:28:50.050328 00:00:00.025642 51800 1480 53280 0 1480 Mis
1690 15:28:50.050343 00:00:00.025657 53280 1480 54760 0 1480 Mis
1691 15:28:50.054558 00:00:00.029872 54760 1480 56240 0 1480 Mis
1692 15:28:50.054614 00:00:00.029928 57720 1480 59200 -1480 1480 Mis
1693 15:28:50.054628 00:00:00.029942 59200 1480 60680 0 1480 Mis
1694 15:28:50.054680 00:00:00.029994 62160 1480 63640 -1480 1480 Mis
1695 15:28:50.054694 00:00:00.030008 63640 368 64008 0 368 Lis
64,008 bytes is the final length of the IP packet
41 packets were used for reassembly
59,568 bytes were accumulated for reassembly
------------------------------------------------------------------------------- 5 1,641 packets required reassembly
54 IP packet reassemblies were done
52 IP packets were completely reassembled
2 IP packets were incomplete
0 packets failed reassembly
1,627 storage requests for buffers were made
64,080 bytes of buffer space are still in use
191,872 bytes of buffer space was the maximum in use
114,688 bytes of control storage were usedReassembly is always done (except with the NOREASSEMBLY option). However, the REASSEMBLY(DETAIL) option is needed for the report on completed reassemblies.
- 1
- The current packet that was reassembled is identified with source and destination IP address and port numbers. The IP identification number is shown. The status of the reassembly is shown. Completed packets are shown when the final packet is received. Incomplete packets are shown during the final processing.
- 2
- Each packet that was reassembled is shown. The flag shows the
type of packet:
- Fis
- First in the segment. The offset was 0.
- Mis
- Middle in the segment. The offset was a nonzero value and the more fragment flag was set.
- Lis
- Last in the segment. The offset was nonzero and the more fragment flag was not set.
- Ooo
- The packet arrived out of order.
- 3
- When all the trace records have been processed the final report on reassembly is formatted. The maximum reassembly buffer size is shown. Packets that would exceed this size are rejected. This simulates the Ping of Death processing.
- 4
- Incomplete packets that did not complete reassembly are shown.
- 5
- The total number of trace records that were reassembled is shown
with other statistics.
- 200 packets required reassembly
- The number of packets that required reassembly (that had a fragment offset or the more fragment flag set).
- 57 IP packet reassemblies were done
- The number of reassembled packets.
- 54 IP packets were completely reassembled
- The number of reassembled packets where all the fragments were found.
- 3 IP packets were incomplete
- The number of reassembled packets where all the fragments were not found.
- 0 packets failed reassembly
- The number of packets that would have caused the completed packet to exceed the reassembly size.
- 170 storage requests for buffers were made
- The number of times a request for reassembly buffer was made.
- 128,747 bytes of buffer space is still in use
- The amount of storage still in use for incomplete packets.
- 284,158 bytes of buffer space was the maximum in use
- The maximum amount of storage in use while reassembling packets.
Guideline: For reassembled
packets, the calculated check sum fields are not X'FFFF', because
the packets were modified by the reassembly process.