Ubigate iBG2016 Configuration Guide/Ed.00
© SAMSUNG Electronics Co., Ltd.
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The ether-type value of 0x8847 is added to the hash table and a pointer to
class ‘mpls’ is stored in that entry. For any classification type, it is possible for
the match rule to have a range of values or multiple, non-contiguous values.
Remember that once the first child-class added and the ‘classification-type’ or
‘search-type’ is set in the parent class, any subsequent child classes of that
parent class must have the same classification type in its match rule.
Note that this is not a limitation but an inherent property of the hierarchical
classification concept.
For a given parent-class, if the search does not yield a match, the packet is
matched to the child-class pointed to by the ‘default_class’ attribute.
This class is known as a ‘default class’. One of the child-classes of a given
parent-class can be configured as a default class. If there is no default class,
packets for which the search does not yield a match will be dropped. In our
example, class ‘def’ is a default class of parent-class ‘root-out’. It would be
created as follows.
Configure/interface/bundle wan1/qos# add-policy-class def root-out
packetclass default
Each class has a queue structure associated with it. However, when a class
becomes a parent class due to the addition of child classes under it, its queue
structure ‘loses significance’ and is no longer active. The queue structure
plays major role in achieving CBQ queuing and scheduling.
Summary of Contents for Ubigate iBG2016
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