netmap: Add --netmap-wait-ping to work around STP blocking ports temporarily#796
Merged
netmap: Add --netmap-wait-ping to work around STP blocking ports temporarily#796
Conversation
Going into and leaving netmap mode causes the link to go down and up as part of a PHY reset. If the interface is connected to a switch with STP enabled, then depending on port configuration, the switch might be muting the port for as many as 30 seconds while the port goes through the listening and learning STP states. To work around this in situations where the switch cannot be reconfigured, `--netmap-wait-ping` allows to wait for end-to-end ICMP connectivity with an IP address before starting the scan.
zakird
approved these changes
Feb 28, 2024
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Going into and leaving netmap mode causes the link to go down and up as
part of a PHY reset. If the interface is connected to a switch with STP
enabled, then depending on port configuration, the switch might be
muting the port for as many as 30 seconds while the port goes through
the listening and learning STP states.
To work around this in situations where the switch cannot be
reconfigured,
--netmap-wait-pingallows to wait for end-to-end ICMPconnectivity with an IP address before starting the scan.
Tested w/FreeBSD 14.0 on VM and bare metal.