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+++ This bug was initially created as a clone of Bug #2115884 +++
Description of problem:
The parser for the iproute2 routing table database (/etc/iproute2/rt_tables etc.) in module_utils/network_lsr/argument_validator.py:IPRouteUtils is too strict. It asserts that entries/lines in the file are of the form `254 main` where the numeric id and the name must be separated by a single space character only. However, according to the what iproute2 does, any whitespace sequence in between the table id and table name should be considered as valid and should be accepted by the route table parser.