topic Re: Bidirectional PCAP in ExtremeSwitching (EXOS/Switch Engine)

Bidirectional PCAP

Configterminal — Thu, 21 Aug 2025 13:42:54 GMT

Hello friends - how do I perform a bidirectional pcap on a simple access port on Switch Engine. I am running variations of the following commands but only seeing ingress traffic flows

debug packet capture ports 3:18 on mirror-to-cpu direction both

debug packet capture ports 3:18 on mirror-to-cpu

debug packet capture ports 3:18 on vlan <VLAN-NAME>

debug packet capture ports 3:18 on vlan <VLAN-NAME> cmd-args "direction both"

Re: Bidirectional PCAP

RobertD1 — Fri, 22 Aug 2025 16:28:45 GMT

This article implies RX and TX are done separately and have to be merged to another file with timestamps intact.

https://extreme-networks.my.site.com/ExtrArticleDetail?an=000082238

Edit: Last time I did a local packet capture I used this article and did not have to merge any files. Just had to remove the 52 bytes header I recall. Was able to open in Wireshark and see bidirectional frames.

https://extreme-networks.my.site.com/ExtrArticleDetail?an=000079573