01-03-2008 07:07 AM - edited 03-05-2019 08:15 PM
I'm trying to use per-packet load sharing on two E1 serial links, but it seems that does not work with FTP.. When I ping I can see the count on the other the two interfaces but when I tryo to FTP, I see the hits on one serial only.. Am I doing something wrong? Or is that a normal behavior?
Thanks in advance..
01-03-2008 07:10 AM
This is normal, IF all the ftp requests are coming from the same source. If you have tons of hosts on the inside sending ftp requests they should be load balancing. but just one in particular, this is normal :)
01-03-2008 07:13 AM
It's per-packet not per-destination load sharing.. So I think it should load share regardless if it's coming from one source or not..
01-03-2008 09:14 AM
You may configure multilink & bundle the 2 E1's together.
01-03-2008 09:34 AM
What is your switching method? CEF, FastSwitch? What command did you use to enable per-packet load-sharing?
01-03-2008 10:26 AM
I have ip cef configured in the globl config.
On the interfaces (S0/0 and S0/1) I have the command
ip load-sharing per-packet
I also have "ip route-cache flow" on both interfaces..
Thanks in advance
01-03-2008 10:53 AM
do a "show cef internal" and look for the prefix that covers the ip of the ftp server. Does it say its per-dest or per-packet? Also, just curious, what are you using to confirm that all packets are using only 1 interface?
Thanks
01-03-2008 11:20 AM
I left the office now.. So I won't be able to do do the show command.. But I use the "show interface" to see the interface output rate, and one interface shows "0" while the other shows soe readings..
01-05-2008 12:15 AM
Are both interfaces running a routing protocol that has max-paths at least 2, and do they show up as equal cost in the routing table?
If not, you at least need static routes to the destination prefix that are equal cost across both paths.
Here's some good troubleshooting tips:
http://www.cisco.com/en/US/tech/tk827/tk831/technologies_tech_note09186a0080094806.shtml
01-05-2008 11:22 AM
Actually, what platform is this, as well?
NS
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