1-34
IM AQ1300-01EN
NA Transmission Conditions
• If a collision occurs while an NA is being sent, it is resent.
• If an NS is received while transmission is paused, an NA is sent after transmission is resumed.
• If transmission is paused and the AQ1300/AQ1301 is waiting to send an NA, an insert frame, and
a normal test frame, after transmission resumes, the AQ1300/AQ1301 will send the insert frame,
the NA, and then the normal test frame.
• NAs are not sent for NSs that are received before the transmission of the current NA has
finished.
• If a linkdown occurs immediately after an NS is received, the AQ1300/AQ1301 will not send a
reply to that request.
Ping6 Reply
In Ping6 replying, the AQ1300/AQ1301 sends a ping6 reply (ICMPv6 echo reply) when it receives a
ping6 request (ICMPv6 echo request).
When you enable ping6 replying and the test mode is not Loopback Test, ping replying is always
enabled regardless of the test mode setting, filter condition, or transmission condition.
When Auto or Auto(Remote) has been selected in the Test menu, ping6 replying is always enabled.
When Manual has been selected in the Test menu and the test layer is L3-IPv6, you can configure
ping6 replying by specifying the emulation settings.
Ping6 Requests That Are Not Answered
The AQ1300/AQ1301 will not send a ping6 reply in response to the following kinds of ping6
requests.
• Ping6 requests with an LLC/SNAP header attached (only ping6 requests that conform to the DIX
specification are supported)
• Fragmented ping6 requests.
• Ping6 requests with an MPLS label attached
• Ping6 requests that are counted as errors, except for payload and sequence errors
• Ping6 requests that are received at the same time that a linkdown occurs
• Ping6 requests that are received at the same time that a collision occurs
• Ping6 requests whose packet lengths are less than 81 bytes, greater than 1519 bytes (greater
than 1523 when there is one VLAN stack or greater than 1527 when there are two VLAN stacks),
or greater than the oversize threshold.
• Ping6 requests with three or more VLAN stacks.
VLAN Tag Handling
The AQ1300/AQ1301 sends ping6 replies in response to ping6 requests with VLAN tags attached.
Ping6 Reply Transmission Conditions
• If a collision occurs while a ping6 reply is being sent, it is resent.
• If a ping6 request is received while transmission is paused, a ping6 reply is sent after
transmission is resumed.
• If transmission is paused and the AQ1300/AQ1301 is waiting to send a ping6 reply and a normal
test frame, after transmission resumes, the AQ1300/AQ1301 will send the ping6 reply first and
then the normal test frame.
• Replies are not sent for ping6 requests that are received before the transmission of the current
ping6 reply has finished.
• If a linkdown occurs immediately after a ping6 request is received, the AQ1300/AQ1301 will not
send a reply to that request.
1.9 Emulation