Open Shortest Path First (OSPF) Exchanging Information for Virtual Extensible LAN (VXLANs)
ExtremeXOS leverages Open Shortest Path First (OSPF) to advertise and learn VTEPs dynamically
in a VXLAN network. OSPFv2 advertises the triplet of VNI/Endpoint IP Address/Advertising
Router ID through OSPFv2 domain using type 11 opaque link state advertisements (LSAs). The
OSPFv2 VXLAN LSA link state ID uses opaque type 128. The remaining 24 bits of the field are
set to the VXLAN VNI. Each locally configured VNI corresponds to a single opaque LSA
advertised by the router. The OSPFv2 VXLAN LSA payload contains one top level TLV that
specifies the locally configured IPv4 endpoint address on the advertising router.
Note
- The remote endpoints learned using OSPF are not saved to the configuration.
- The OSPFv2 VXLAN opaque LSA is only advertised if OSPF VXLAN extensions are enabled.
- OSPF VXLAN extensions can only be enabled when OSPFv2 is disabled.
- Local endpoint address can only be IPv4. IPv6 is not supported.
Supported Platforms
Summit X770 and X670-G2 series switches (standalone), and stacks that have X770 and X670-G2 slots only.
New CLI Commands
enable ospf vxlan-extensions
disable ospf vxlan-extensions
Changed CLI Commands
The show ospf command output has been changed (shown in bold):
show ospf OSPF : Enabled MPLS LSP as Next-Hop: No RouterId : 192.168.170.60 RouterId Selection : Automatic ASBR : No ABR : No ExtLSA : 0 ExtLSAChecksum : 0x0 OriginateNewLSA : 190 ReceivedNewLSA : 102 SpfHoldTime : 3 Lsa Batch Interval : 30s CapabilityOpaqueLSA : Enabled 10M Cost : 10 100M Cost : 5 1000M Cost (1G) : 4 10000M Cost (10G) : 2 40000M Cost (40G) : 2 100000M Cost (100G) : 1 Router Alert : Disabled Import Policy File : ASExternal LSALimit : Disabled Timeout (Count) : Disabled (0) Originate Default : Disabled SNMP Traps : Disabled VXLAN Extensions : Enabled Redistribute: Protocol Status cost Type Tag Policy direct Disabled 0 0 0 None static Disabled 0 0 0 None rip Disabled 0 0 0 None e-bgp Disabled 0 0 0 None i-bgp Disabled 0 0 0 None isis-level-1 Disabled 0 0 0 None isis-level-2 Disabled 0 0 0 None isis-level-1-external Disabled 0 0 0 None isis-level-2-external Disabled 0 0 0 None