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Nov
9
awarded  Benefactor
Nov
9
accepted Wireshark shows “TCP Dup Ack” on SACK after each regular ACK
Nov
7
comment Wireshark shows “TCP Dup Ack” on SACK after each regular ACK
The packets are originating from the same machine (but on a different interface than the mirror input). The switch is an Arista 7150S-64. The host has two Ethernet intefaces connected to the switch: one for regular use and one for the mirroring/capture.
Nov
7
awarded  Promoter
Nov
7
revised Wireshark shows “TCP Dup Ack” on SACK after each regular ACK
added 100 characters in body
Nov
4
asked Wireshark shows “TCP Dup Ack” on SACK after each regular ACK
Sep
2
awarded  Caucus
Jun
28
awarded  Teacher
Jan
25
awarded  Yearling
Jan
22
comment How passively monitor for tcp packet loss? (Linux)
@AndrewB: You can do watch ss -ti.
Dec
10
awarded  Curious
Dec
9
comment RHEL sends mail as myhost.localdomain but I don't want the localdomain suffix/FQDN
Thank you for a very detailed and useful answer.
Dec
9
accepted RHEL sends mail as myhost.localdomain but I don't want the localdomain suffix/FQDN
Dec
9
comment RHEL sends mail as myhost.localdomain but I don't want the localdomain suffix/FQDN
That can fix cron but not any of the other programs like mail.
Dec
9
comment RHEL sends mail as myhost.localdomain but I don't want the localdomain suffix/FQDN
@chicks: postfix.
Dec
9
asked RHEL sends mail as myhost.localdomain but I don't want the localdomain suffix/FQDN
Sep
16
awarded  Nice Question
May
28
accepted How do fiber Ethernet transmitters set their power output?
May
13
comment How do fiber Ethernet transmitters set their power output?
OK, fair enough. Do you know then why the switch reports the current transmit power output as a specific number within the SFP's range for a particular port? For example, an SFP rated for -3 to -9 dBm shows in the management console as outputting -5 dBm. Does the SFP really know how much it is sending if it can't control it?
May
13
comment How do fiber Ethernet transmitters set their power output?
I'm not sure how to interpret your answer. To be clear, I'm not concerned about saving power here--I'm wondering if I can somehow make the transmitter use more power in configurations that need it (e.g. if the fiber is quite long or has a few joints, but not so long that I necessarily want to switch to long-haul SFPs).