Switch Impact for DAD State Changes
When an IP address is in a duplicate or tentative state, the normal
behavior of the switch may change since that IP address isn‘t usable, even though it
does exist. The following are some examples of what can happen when an IP address is
marked duplicate or tentative:
- Routes may be withdrawn or marked
inactive.
- Dynamic IP ARP entries may get
flushed.
- VRRP (Virtual Router Redundancy Protocol)
virtual router (VR) instances may be disabled and
put into init state causing the backup VRRP router to take over mastership.
- Ping and traceroute commands may fail.
- The DHCP (Dynamic Host Configuration Protocol)
client will send a DHCP decline to the DHCP server if the IP address for a DHCP
client on a VLAN (Virtual LAN) is not Valid.
- The DHCP scope IP address range configuration might fail when
the DHCP enabled VLAN IP address becomes duplicate.
- SNMP (Simple Network Management Protocol)
requests may fail.
- SNMP traps will not be sent if the if
the configured source IP address is not Valid.
- SNTP time updates are not received when IP address is in transitioning states such
as tentative and duplicate.
- Domain name lookup should not work if the DNS server reachable VLAN has
invalid/tentative/duplicate IP Address.
Print
this page
Email this topic
Feedback
View PDF
Download EPUB