Source – https://www.perkin.org.uk/
The expected
[code language=“plain“]ip dhcp pool host.net.example.com
option 119 ascii net.example.com,example.com[/code]
doesn’t work. So you need to encode search domains in hex using following example script written in Python:
import syshexlist = []for domain in sys.argv[1:]:
for part in domain.split(„.“):
hexlist.append(„%02x“ % len(part))
for c in part:
hexlist.append(c.encode(„hex“))
hexlist.append(„00“)print „“.join([(„.%s“ % (x) if i and not i % 2 else x) \
for i, x in enumerate(hexlist)])[/code]
Execute it:
036e.6574.0765.7861.6d70.6c65.0363.6f6d.0007.6578.616d.706c.6503.636f.6d00[/code]
So the config in ios must look like:
[code language=“plain“]ip dhcp pool host.net.example.com
option 119 hex 036e.6574.0765.7861.6d70.6c65.0363.6f6d.0007.6578.616d.706c.6503.636f.6d00[/code]
It’s done!