('speed',models.CharField(choices=[('10-half','10-half'),('100-half','100-half'),('10-full','10-full'),('100-full','100-full'),('1000-full','1000-full'),('auto','auto'),('auto-10','auto-10'),('auto-100','auto-100')],default='auto',help_text='Mode de transmission et vitesse du port',max_length=32,verbose_name='Speed')),
('mac_limit',models.IntegerField(blank=True,help_text='Limit du nombre de mac sur le port',null=True,verbose_name='Mac limit')),
('flow_control',models.BooleanField(default=False,help_text='Gestion des débits',verbose_name='Flow control')),