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S-series Stops Advertising IPv6 Prefix toClients

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TitleS-series Stops Advertising IPv6 Prefix toClients
Symptoms
  • Suddenly, all clients using an EUI-64 address are not reachable
  • IPv6 OSPF routes all correct based on age and routing is working
  • Clients have no prefix
  • S-Series Stops Advertising Prefix to EUI-64 Clients
  • Ipv6 Interface shows next ND is to be sent in 42430642 seconds
show ipv6 interface" "
core(su)->sh ipv6 int

vlan.0.2 is Operationally up, Administratively up
IPv6 is enabled, link-local address is fe80::21f:45ff:fe9e:736b%2
Global unicast address(es):
2001:db8:c000:2::1, subnet is 2001:DB8:c000:2::/64
Joined group address(es):
ff02::1
ff02::1:ff9e:736b
ff02::1:ff00:1
ff02::2
ff02::5
ff02::6
IPv6 forwarding enabled
IPv6 address auto-configuration is disabled
IPv6 Dhcp Relay Address(es): Not Set
Incoming IPv6 Access list is not set
Outgoing IPv6 Access list is not set
ICMP error messages limited to one every 100 milliseconds
Sending of ICMP Destination Unreachable Messages is enabled
Sending of ICMP Redirect Messages is enabled
Sending of ICMP Echo-Reply Messages is enabled
IPv6 Policy Routing is disabled
ND DAD is enabled, number of DAD attempts: 1
ARP/ND proxy all is disabled
ND Router Preference is Medium
ND advertised reachable time is 0 milliseconds
ND advertised flags: managed = Off other-config = Off
ND advertised Neighbor Solicitation transmit interval is 0
ND MTU is not advertised
ND router advertisements are sent every 198 to 600 seconds (next one in 42430644 seconds)
  • Disable and enable IPv6 forwarding on interface resolves
In interface config  type
no ipv6 forwarding
ipv6 forwarding 

 
Environment
  • S-Series
  • Firmware 8.42.01.0007
Cause
Under investigation
Resolution
Gather show ipv6 interface and a show support while broken and open a case with the GTAC.
How to contact Extreme Networks Global Technical Assistance Center (GTAC)
Additional notes

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