Alcatel-Lucent OmniSwitch 10K - Troubleshooting UDP Relay

OmniSwitch OS6860/OS6900/OS10K Troubleshooting Guide Part No.032996-00 Rev.A
AOS Release 7.X and 8.X January 2015
Alcatel-Lucent Page 56 of 148
Managed Address Configuration : enabled
Other Stateful Configuration : enabled
Weak Host Sends : disabled
Weak Host Receives : disabled
Use Automatic Metric : enabled
Ignore Default Routes : disabled
Advertised Router Lifetime : 1800 seconds
Advertise Default Route : enabled
Current Hop Limit : 64
Force ARPND Wake up patterns : disabled
Directed MAC Wake up patterns : disabled
Output of DHCPv6 Client
Ethernet adapter ipv6 :
Connection-specific DNS Suffix . . . . : example.com
Description. . . . . . . . . . . . . . : Intel(R) PRO/1000 PT Dual Port Server Adapter #2
Physical Address . . . . . . . . . . . : 00-15-17-D0-43-1F
DHCP Enabled . . . . . . . . . . . . . : Yes
Autoconfiguration Enabled. . . . . . . : Yes
IPv6 Adress . . . . . . . . . . . . . .: 2001:db7::2(Preferred)
Lease Obtained . . . . . . . . . . . . : Wednesday, October 30, 2013 2:20:27PM
Lease Expires. . . . . . . . . . . . . : Wednesday, October 30, 2013 2:30:26PM
Link-local IPv6 Address. . . . . . . . : fe80::65a9:6bca:5714:a211%14(préféré)
IPv4 Address . . . . . . . . . . . . . : 169.254.162.17(Preferred)
Subnet Mask. . . . . . . . . . . . . . : 255.255.0.0
Default Gateway. . . . . . . . . . . . : fe80::eae7:32ff:fe13:647e%14
DHCPv6 IAID. . . . . . . . . . . . . . : 251663639
DHCPv6 Client DUID . . . . . . . . . . : 00-01-00-01-19-C3-8E-31-00-24-81-18-5B-F8
DNS Servers . . . . . . . . . . . . . : 2001:db8::1
NetBIOS over Tcpip . . . . . . . . . . : Enabled
DNS Suffix Search List. . . . . . . . : example.com
9.2. Troubleshooting UDP Relay
Minimum working configuration
DHCP Relay Agent Service
-> show configuration snapshot ip-helper
! UDP Relay:
ip helper address 192.168.10.254
Generic UDP Relay Service
-> show configuration snapshot ip-helper
! UDP Relay:
ip helper address 192.168.10.254
ip udp relay port 53
Packet Flow
This packet flow assumes the end station is directly connected to the OS10K/OS6900/OS6860/OS6860E unit. In the
customer network, the OS10K/OS6900/OS6860/OS6860E unit will most likely not directly connect to end stations
but to edge switches. This packet flow description is described what happens when the UDP packets entered the
OS10K/OS6900/OS6860/OS6860E unit. Also assume the end station is on VLAN 30 on VRF 2 with the ip interface
for VLAN 30 is 10.30.0.254.