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User profile for user: vgarciag
vgarciag Author
User level: Level 1
5 points

Connection drops in macOS Sierra

Hi all,


in recent update to OSX Sierra I can see a problem that came with Mavericks (Mavericks and Failed ARP causing network drops!) and start again. But in this case I cannot fix it. It only occurs in the LAN in the office and with the WiFi and wired connection:


test@Mac:~ ➜ ping google.com

PING google.com (x.x.x.x): 56 data bytes

Request timeout for icmp_seq 0

64 bytes from x.x.x.x: icmp_seq=1 ttl=51 time=5.382 ms

64 bytes from x.x.x.x: icmp_seq=2 ttl=51 time=6.888 ms

64 bytes from x.x.x.x: icmp_seq=3 ttl=51 time=6.367 ms

64 bytes from x.x.x.x: icmp_seq=4 ttl=51 time=6.727 ms

64 bytes from x.x.x.x: icmp_seq=5 ttl=51 time=5.606 ms

Request timeout for icmp_seq 6

Request timeout for icmp_seq 7

64 bytes from x.x.x.x: icmp_seq=8 ttl=51 time=7.123 ms

64 bytes from x.x.x.x: icmp_seq=9 ttl=51 time=6.326 ms

Request timeout for icmp_seq 10

Request timeout for icmp_seq 11

64 bytes from x.x.x.x: icmp_seq=12 ttl=51 time=5.569 ms

64 bytes from x.x.x.x: icmp_seq=13 ttl=51 time=7.731 ms

64 bytes from x.x.x.x: icmp_seq=14 ttl=51 time=5.341 ms

64 bytes from x.x.x.x: icmp_seq=15 ttl=51 time=7.478 ms

Request timeout for icmp_seq 16

Request timeout for icmp_seq 17

Request timeout for icmp_seq 18

64 bytes from x.x.x.x: icmp_seq=19 ttl=51 time=5.871 ms

64 bytes from x.x.x.x: icmp_seq=20 ttl=51 time=5.034 ms

64 bytes from x.x.x.x: icmp_seq=21 ttl=51 time=8.106 ms


The connection drops in this case are more frequently but are more short and it is specially annoying using ssh connections or skype calls.


I suspect that this problem is similar to the previous but I cannot hit the correct key.


Anyone has the same problem?

MacBook Pro with Retina display, macOS Sierra (10.12)

Posted on Oct 13, 2016 7:32 AM

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6 replies
User profile for user: trevoz
trevoz
User level: Level 4
1,990 points

Oct 13, 2016 4:56 PM in response to vgarciag

All this shows is that you are suffering some degree of packet loss to external networks the reason for which could be as simple as an external router anywhere in the path between you and google suffering congestion and deciding to drop ICMP packets which is a fairly common response especially in the days of DDoS. This does not necessarily suggest a loss of connectivity.

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User profile for user: vgarciag
vgarciag Author
User level: Level 1
5 points

Oct 14, 2016 12:06 AM in response to trevoz

I put a ping to google.com but the loss of packages is in the LAN too. Ssh connections to local machines and Skype calls have this problem. Other systems as Windows or Linux haven't this problem doing ping to google.com or other LAN server. My Macbook with El Capitan version worked well. The problem has come with Sierra.


This issue is with one network element in the LAN and OSX Sierra. I am almost convinced that a proper configuration in Sierra fix the problem like it occurred in Mavericks

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Connection drops in macOS Sierra

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