[LARTC] How to change HTB default value?

[openings]

Hi.

I want to change HTB qdisc's default setting to 20.

but, i cannot change it.

# tc qdisc change dev eth0 root handle 1: htb default 20
RTNETLINK answers: Invalid argument

I can add qdisc and del qdisc. but can't change qdisc setting.

For class, I can add, del, change all setting.

How to change HTB qdisc's default value?ÀE0¦j)bž       
b²ßË
™¨¥™©Ý³Ö§–m§ÿæj)fjwlõ©åþf¢–f§þX¬¶)ߣùZ®×9dΆÛiÿùZ®×(®