[Advaita-l] Sanyasin and his duties toward his ancestors

[Srimugunthan Dhandapani]

Hi all,
I am trying to understand sanyasa dharma and a householder's dharma.
For a householder , not doing pinda darpan alone results in pithru dosha.

On the other hand, If one takes up sanyasa, then he renounces his family
relations and his relationship with his parents. So he cant

1. Take care of his parents when they are old.
2. Will not have a child . So he doesnt help in the Propagation of his
family clan or growing the family lineage.
3. Will not offer pinda darpana or shradda ceremony to their ancestors

 But sanyasa is hailed as supreme. In common perception, all of the
above causes pain to his parents and indirectly to his ancestors too.

 Shouldn't there be a consequence of a renunciate not-doing of
pinda-darpana to his ancestors, not taking care of parents doing old
age, not having a
offspring for the propagation of the clan?  Is it considered during
the sanyasa rituals ?

what does the scriptures say about the consequence for sanyasin as well as
the consequence to his parents and ancestors?

Thanks for answering.
-Sri