VxLAN vs GN3

[Edson_Moura]

Hi folks,

I'm doing a LAB with VxLAN using GNS3.
I configured ospf extensions or, If I configure static to the remote VTEPs and even so it's not working well. 

The results are below:

* DC1LEAF1.1 # show ospf lsdb opaque-global

                Opaque Global LSAs
Link State ID   Adv Router      Seq#         Age Chksum
-------------------------------------------------------------
128.0.32.0      10.0.0.252      0xffffffff80000003 1365  0x2978
128.0.32.0      10.0.0.253      0xffffffff80000003 1364  0x2d72
* DC1LEAF1.2 #

* DC1LEAF1.2 # show ospf lsdb detail lsid 128.0.32.0

                LSAs for Area: 0.0.0.0

LSA Type: Opaque Global
Link State Id: 128.0.32.0 (VXLAN vni 8192)
Options: None
Advertising Router: 10.0.0.252
Sequence number: 0xffffffff80000003
Checksum: 0x2978
Age: 1400
Length: 28
Receive Interface: None
Opaque Information :
        Endpoint IP Address TLV: 10.0.0.252

LSA Type: Opaque Global
Link State Id: 128.0.32.0 (VXLAN vni 8192)
Options: None
Advertising Router: 10.0.0.253
Sequence number: 0xffffffff80000003
Checksum: 0x2d72
Age: 1399
Length: 28
Receive Interface: None
Opaque Information :
        Endpoint IP Address TLV: 10.0.0.253

* DC1LEAF1.3 # show virtual-network vxlan vni 8192
Name               : vxnet1
Created By         : CLI,               Tenant VRF       : VR-Default
Tenant VLAN        : SERVER1            VID              : None
Local Endpoint     : 10.0.0.253         Endpoint VRF     : VR-Default
Flooding           : Standard           Stats Monitor    : Off
                            == VXLAN Information ==
  VNI              : 8192 (0.32.0)
  Group IP         :                    Inner Tag        : Exclude
  Remote Endpoints : 10.0.0.252 (VR-Default)
                          == End VXLAN Information ==

* DC1LEAF1.4 # show virtual-network remote-endpoint vxlan ipaddress 10.0.0.252

IP Address        : 10.0.0.252                            VRF : VR-Default
Admin State       : Enabled
Learning          : Enabled                     Stats Monitor : Off
                           == Next Hop Information ==
    Gateway       : 10.0.2.0                             MAC  : 0c:26:47:2d:00:00
    Interface     : DC1LEAF1-TO-CAMPUS1SPINE1            Port : 1:1
                         == End Next Hop Information ==

                       == Virtual Network Associations ==
  Virtual Network : vxnet1                                VNI : 8192
  Origin          : OSPF Learned,
                     == End Virtual Network Associations ==

* DC1LEAF1.6 # show virtual-network remote-endpoint vxlan vni 8192
IP Address      Virtual Router                      Next Hops    Origin    State
                                                   Active/Total  Flags
================================================================================
10.0.0.252      VR-Default                              1/1      -o---     Down
================================================================================
Origin Flags: (b) BGP Learned, (E) Edge Auto-Configured, (F) FDB Configured,
              (o) OSPF Learned, (T) OTM Configured.
Total number of Remote Endpoints  : 1
Virtual Network                   : vxnet1

* DC1LEAF1.5 # show fdb vxlan
MAC                                      VLAN Name( Tag)  Age  Flags          Port / Virtual Port List
------------------------------------------------------------------------------------------------------

Flags : d - Dynamic, s - Static, p - Permanent, n - NetLogin, m - MAC, i - IP,
        x - IPX, l - lockdown MAC, L - lockdown-timeout MAC, M- Mirror, B - Egress Blackhole,
        b - Ingress Blackhole, v - MAC-Based VLAN, P - Private VLAN, T - VLAN translation,
        D - drop packet, h - Hardware Aging, o - IEEE 802.1ah Backbone MAC,
        S - Software Controlled Deletion, r - MSRP,
        X - VXLAN, E - EVPN

Total: 2 Static: 0  Perm: 0  Dyn: 2  Dropped: 115  Locked: 0  Locked with Timeout: 0
FDB Aging time: 300

Am I doing something wrong or VxLAN doesn't work with GNS3?

Thanks.

[Gabriel_G]

Hi Edson,

I cannot confirm 100%, but I have a feeling this is a limitation of the GNS3 VMs with VXLAN. Some advanced features and features that require specific hardware don't work very well when virtualized; I believe this is one of them.