<div>
Hi,<br />
<br />
It's alternating each probe over both paths.
</div>


Hi,

It's alternating each probe over both paths.

<div>
yes the per packet load balancing is normal for equal cost routes (and with some configuration using the EIGRP variance command for unequal cost routes). However in your case both the paths are not really equal since the path to 172.16.1.1 through R3 is an extra hop but this is a consequence of redistribution between protocols and can sometimes introduce suboptimal routes such as the one through R3.<br />
<br />
I think you can change the per packet loadbalancing behaviour.<br />

</div>


yes the per packet load balancing is normal for equal cost routes (and with some configuration using the EIGRP variance command for unequal cost routes). However in your case both the paths are not really equal since the path to 172.16.1.1 through R3 is an extra hop but this is a consequence of redistribution between protocols and can sometimes introduce suboptimal routes such as the one through R3.

I think you can change the per packet loadbalancing behaviour.


<div>
final question. What is the actual path between R1 and 172.16.1.1 (r4)
</div>


final question. What is the actual path between R1 and 172.16.1.1 (r4)

<div>
<div class="content wysiwyg-content">
R1 has two paths to get to 172.16.1.1<br />
via 2.2.2.1 and via 3.3.3.1<br />
<br />
Why does the trace look like this?:<br />
<br />
1 &nbsp;2.2.2.1 &nbsp;4 msec<br />
&nbsp; &nbsp;3.3.3.1 &nbsp; 4 msec<br />
&nbsp; &nbsp;2.2.2.1 0 msec<br />
<br />
2 &nbsp;1.1.1.1 &nbsp;4msec<br />
&nbsp; &nbsp;4.4.4.2 &nbsp;4msec<br />
&nbsp; &nbsp;1.1.1.1 &nbsp;4 msec <a href="https://filedb.experts-exchange.com/incoming/2010/11_w49/374908/labospfeigrp--1-.jpg" target="_blank" title="na (30 KB)"><img alt="na" class="file-block lazyload" style="max-width: 550px;" data-src="https://filedb.experts-exchange.com/incoming/2010/11_w49/374908/labospfeigrp--1-.jpg" /></a> 
</div>
</div>


labospfeigrp--1-.jpg

R1 has two paths to get to 172.16.1.1
via 2.2.2.1 and via 3.3.3.1

Why does the trace look like this?:

1  2.2.2.1  4 msec
   3.3.3.1   4 msec
   2.2.2.1 0 msec

2  1.1.1.1  4msec
   4.4.4.2  4msec
   1.1.1.1  4 msec  

Question on EIGRP route (traceroute weird)

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