
Troubleshooting an Operational Problem
308656-14.00 Rev 00
3-19
Finding the Slot That Sent a Bad Packet That Was Not a BofL Packet
Find the number of the slot that sent the bad packet by looking at the hexadecimal
number that is in the same position as the bold number in Figure 3-3
.
Figure 3-3. Finding the Slot Number When the Buffer Checksum Message Does Not
Reference a Backplane BofL Packet
In the following example, the hexadecimal number in question is the 0xa000
portion of the number 0xa0000012. Convert the number to its binary equivalent.
0xa000 = 1010 0000 0000 0000
In the binary representation of the number, a value of 0 means that the slot did not
originate the message; a value of 1 means that the slot did originate the message.
Ignore the leftmost digit. The digit to the right of the leftmost digit is the value for
slot 1, the next digit to the right is the value for slot 2, the next digit to the right is
the value for slot 3, and so on. The rightmost digit is meaningless because the
router can only have 14 slots. In this example, slot 2 sent the message that failed.
Call the Nortel Networks Technical Solutions Center and describe the situation.
Depending on whether the slot sending or receiving the packet is always the same,
you may need to replace the FRE processor.
mm/dd/yy 04:58:56 141.122.57.1 4 GAME W "bad fwd receive buffer checksum"
mm/dd/yy 04:58:56 141.122.57.1 4 GAME D "buf=0x801da800 - 0x00000000
0x801ce400 0xffc00011 0x007c04a4 0x306da810 - xsum=0xd7781ec8
0x801da86c - 0x00050004 0x0022d300 0x76c00000 0x76c00000
0x801da87c - 0x8b51704d 0x
0012 0x221a090b 0x00000121
0x801da88c - 0xf300001c 0x8638002b 0xb9f11240 0xc0000000
0x801da89c - 0x20009000 0xa4850452 0x0002030c 0x31303030
0x801da8ac - 0x39303238 0x41343835 0x30313032 0x50534552
0x801da8bc - 0x5645525f 0x41353039 0x00000000 0x00000000
0x80"
TRB0005A
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