ESFQ is an enhanced SFQ. Unlike SFQ, it can use only destination and/or source addresses to put the packets in internal classes. SFQ uses a combination of ports and ip-address.
If you set perturb too small, esfq has no time to built a good hash table.

This qdisc was posted on the LARTC mailing list by Alexander Atanasov on 05/06/2002.
stef.coene@docum.org