Two TTL values seen when using ip.ttl
When using ip.ttl filter, I sometimes get two values for example 128,123. What does that mean?
In general, if a field is found multiple times in a packet, it is displayed as a list. The same applies when added as a column in Wireshark. For example:
tshark -r file.pcapng -T fields -e ip.addr -Y ip
Will normally show 2 IP4-addresses (src + dst) as a comma-seperated list. Comma is the default, that can be changed with the option -E aggregator.
So if ip.ttl outputs multiple values it occurs multiple times. for example a ICMP packet.
Asked: 2025-06-09 15:04:41 +0000
Seen: 228 times
Last updated: Jul 14
Is the traffic encapsulated, e.g. IP over something over IP?
Also occurs in ICMP packets that include the IP header of the offending outbound packet.
The Ultimate PCAPfrom https://weberblog.net/the-ultimate-pcap/ includes both encapsulated and ICMP packets that match a display filter of
count(ip.ttl) > 1.Do you mean in one packet or in two packets?