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The same issue on rhel-6.
# tc qd replace dev eth0 root pfifo
# tc qd replace dev eth0 root pfifo_fast
qdisc 'pfifo_fast' does not support option parsing
# rpm -q iproute
iproute-2.6.32-45.el6.i686
+++ This bug was initially created as a clone of Bug #1255316 +++
'tc' program of current RHEL7's iproute package does not allow to attach pfifo_fast qdisc to a device:
# tc qd show dev eth0
qdisc pfifo_fast 0: root refcnt 2 bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1
# tc qd replace dev eth0 root pfifo
# tc qd show dev eth0
qdisc pfifo 8004: root refcnt 2 limit 1000p
# tc qd replace dev eth0 root pfifo_fast
qdisc 'pfifo_fast' does not support option parsing
This is an obvious bug (no options were given above, still tc complains). It has been fixed upstream:
commit e9e78b0db0e023035e346ba67de838be851eb665
Author: Stephen Hemminger <stephen>
Date: Mon Aug 26 08:41:19 2013 -0700
tc: allow qdisc without options
Pfifo_fast needs no options. So don't force it to have parsing code.
commit 0a502b21e30be835dcad8d9c6023a41da8709eb1
Author: Stephen Hemminger <stephen>
Date: Sun Oct 27 12:26:47 2013 -0700
Fix handling of qdis without options
Some qdisc like htb want the parse_qopt to be called even if no options
present. Fixes regression caused by:
e9e78b0db0e023035e346ba67de838be851eb665 is the first bad commit
commit e9e78b0db0e023035e346ba67de838be851eb665
Author: Stephen Hemminger <stephen>
Date: Mon Aug 26 08:41:19 2013 -0700
tc: allow qdisc without options
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2016-0895.html