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Path measurement: Difference between revisions
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#:Both measurement devices calculate checksums starting from the layer 3 packet data to compare packet information on both sides. This means for IPv4 and IPv6 traffic, the Ethernet header including possible VLAN tags is ignored. For non-IP traffic, the complete layer 2 packet is used so this traffic can only be analyzed in switched networks. | #:Both measurement devices calculate checksums starting from the layer 3 packet data to compare packet information on both sides. This means for IPv4 and IPv6 traffic, the Ethernet header including possible VLAN tags is ignored. For non-IP traffic, the complete layer 2 packet is used so this traffic can only be analyzed in switched networks. | ||
# What can I do if I think the packet loss is wrong? | # What can I do if I think the packet loss is wrong? | ||
#: Often, incorrect loss is reported because there is some kind of packet modification that is not support. See the list of limitations above if any of those apply to your setup. Also, try the configuration options to ignore some packet fields to see if that makes any difference. | |||
#: You can contact [[Reaching Allegro Support|our support]] and if possible provide a small capture from both network sides that cover the same traffic. This will help us to find the reason for the shown packet loss. | #: You can contact [[Reaching Allegro Support|our support]] and if possible provide a small capture from both network sides that cover the same traffic. This will help us to find the reason for the shown packet loss. | ||
# How can I distinguish between real packet loss and reported packet loss due to packet modifications? | # How can I distinguish between real packet loss and reported packet loss due to packet modifications? | ||