Anyone seeing ping corruption?

Deepak Jain deepak at ai.net
Thu Dec 9 16:39:54 UTC 2021


Haven't seen this before. This is a Nexus 9K as a testing platform. Getting sporadic complaints about data transfers aborting, but data moves well through the platform.
Hop 13 doesn't respond to our 1400 byte ping, hop 12 does a normal response, Google's 14 corrupts the packet or maybe deliberately manipulates it? 1.1.1.1 doesn't do that.

Any insights welcome.

Thanks,

trace 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 40 byte packets
[deleted 3 hops]
4  154.24.71.85 (154.24.71.85) (AS 7922)  1.199 ms 154.24.32.5 (154.24.32.5) (AS 7922)  1.32 ms 154.24.32.1 (154.24.32.1) (AS 7922)  3.162 ms
5  154.54.81.173 (154.54.81.173) (AS 7922)  1.564 ms 154.54.81.141 (154.54.81.141) (AS 7922)  1.691 ms 154.54.81.221 (154.54.81.221) (AS 7922)  1.616 ms
6  154.54.40.109 (154.54.40.109) (AS 7922)  7.041 ms 154.54.40.105 (154.54.40.105) (AS 7922)  8.035 ms 154.54.40.109 (154.54.40.109) (AS 7922)  7.002 ms
7  154.54.47.218 (154.54.47.218) (AS 7922)  7.183 ms  8.595 ms  7.186 ms
8  154.54.12.18 (154.54.12.18) (AS 7922)  7.55 ms  16.791 ms  16.32 ms
9  * 66.110.96.62 (66.110.96.62) (AS 7922)  16.9 ms  8.202 ms
      [Label=24004 E=0 TTL=1 S=1]
10  66.110.96.58 (66.110.96.58) (AS 7922)  18.65 ms  15.823 ms  11.381 ms
11  72.14.195.232 (72.14.195.232) (AS 7922)  8.473 ms  8.128 ms  8.241 ms
12  108.170.248.33 (108.170.248.33) (AS 7922)  8.771 ms 108.170.248.1 (108.170.248.1) (AS 7922)  9.004 ms  9.223 ms
13  142.251.60.237 (142.251.60.237) (AS 7922)  8.138 ms 142.251.65.95 (142.251.65.95) (AS 7922)  7.768 ms 142.251.64.7 (142.251.64.7) (AS 7922)  8.171 ms
14  8.8.8.8 (8.8.8.8) (AS 7922)  8.271 ms  14.179 ms  8.185 ms

ping
Vrf context to use [default] :
Target IP address or Hostname: 8.8.8.8
Repeat count [5] :
Packet-size [56] : 1400
Timeout in seconds [2] :
Sending interval in seconds [0] :
Extended commands [no] : yes
Interface :
Source address or interface :
Data pattern [0xabcd] :
Type of service [0] :
Set DF bit in IP header [no] :
Time to live [255] :
Loose/Strict, Record, Timestamp, Verbose [None] :
Sweep range of sizes [no] :
Sending 5, 1400-bytes ICMP Echos to 8.8.8.8
Timeout is 2 seconds, data pattern is 0xABCD

76 bytes from 8.8.8.8: icmp_seq=0 ttl=111 time=8.732 ms
wrong data byte #68 should be 0xcd but was 0x0
        37 2d b2 61 af 2f 4 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0
        cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0
        cd ab 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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76 bytes from 8.8.8.8: icmp_seq=1 ttl=111 time=8.395 ms
wrong data byte #68 should be 0xcd but was 0x0
        37 2d b2 61 e7 68 4 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0
        cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0
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76 bytes from 8.8.8.8: icmp_seq=2 ttl=111 time=8.036 ms
wrong data byte #68 should be 0xcd but was 0x0
        37 2d b2 61 45 b2 4 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0
        cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0
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76 bytes from 8.8.8.8: icmp_seq=3 ttl=111 time=9.54 ms
wrong data byte #68 should be 0xcd but was 0x0
        37 2d b2 61 42 e1 4 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0
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76 bytes from 8.8.8.8: icmp_seq=4 ttl=111 time=8.758 ms
wrong data byte #68 should be 0xcd but was 0x0
        37 2d b2 61 be 15 5 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0 cd ab 0 0
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--- 8.8.8.8 ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min/avg/max = 8.036/8.692/9.54 ms


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