load balance between two spine

Owned by Jean-luc KRIKER
Last updated: Jan 03, 2020
4 min read





get VLAN Name

and Tag ( vlan id)

show vlans  ( on the CRB leaf )  

show vlans bd-7 extensive

mac address learnt

and vtep and VGA esi

and VTEP/spine mapping

show ethernet-switching table brief

show ethernet-switching table vlan-name bd-7  

which VTEP used

and traffic statistics

clear interfaces statistics vtep

show interface vtep

>>> Preferred is lower value : vtep.32769

on L3 ( CRB is Spine)show route forwading-table bridge-domain 7

VTEP loopback mapped to dst vni id 

and srce vni

show ethernet-switching vxlan-tunnel-end-point remote

iBGP route 

show bgp summary  ( IP@ of the Peers loopback ) 

show route receive-protocol bgp 10.255.0.1

EVPN routeshow evpn database l2-domain-id 7


Linux

1- install nmap ( include nping )

yum install nmap -y

2- arp

3- ping 192.168.100.1 -s 1436 -i 0.2

-s packet size

-i intervale 200ms



The ping goes only to Spine_B ( vtep.32769 ) 

the udp nping goes only to Spine_A ( vtep.32770 )

ping and nping
[root@bms2 ~]# ping 192.168.100.10 -c 10

{master:0}
root@Leaf2> clear interfaces statistics vtep

{master:0}
root@Leaf2> show interfaces vtep
Physical interface: vtep, Enabled, Physical link is Up
  Interface index: 641, SNMP ifIndex: 509
  Type: Software-Pseudo, Link-level type: VxLAN-Tunnel-Endpoint, MTU: Unlimited, Speed: Unlimited
  Device flags   : Present Running
  Link type      : Full-Duplex
  Link flags     : None
  Last flapped   : Never
    Input packets : 0
    Output packets: 0

  Logical interface vtep.32768 (Index 567) (SNMP ifIndex 541)
    Flags: Up SNMP-Traps 0x4000 Encapsulation: ENET2
    Ethernet segment value: 00:00:00:00:00:00:00:00:00:00, Mode: single-homed, Multi-homed status: Forwarding
    VXLAN Endpoint Type: Source, VXLAN Endpoint Address: 10.255.0.4, L2 Routing Instance: default-switch, L3 Routing Instance: default
    Input packets : 0
    Output packets: 0

  Logical interface vtep.32769 (Index 569) (SNMP ifIndex 542)
    Flags: Up SNMP-Traps Encapsulation: ENET2
    VXLAN Endpoint Type: Remote, VXLAN Endpoint Address: 10.255.0.2, L2 Routing Instance: default-switch, L3 Routing Instance: default
    Input packets : 1
    Output packets: 11  <<<<<<<<<<< Here
    Protocol eth-switch, MTU: Unlimited
      Flags: Trunk-Mode

  Logical interface vtep.32770 (Index 570) (SNMP ifIndex 543)
    Flags: Up SNMP-Traps Encapsulation: ENET2
    VXLAN Endpoint Type: Remote, VXLAN Endpoint Address: 10.255.0.1, L2 Routing Instance: default-switch, L3 Routing Instance: default
    Input packets : 10  <<<<<<<<<<<< Here
    Output packets: 0
    Protocol eth-switch, MTU: Unlimited
      Flags: Trunk-Mode

nping
[root@bms2 ~]# nping 192.168.100.10 --udp -p 80 --mtu 1400 -c 10

{master:0}
root@Leaf2> show interfaces vtep
. . .
  Logical interface vtep.32769 (Index 569) (SNMP ifIndex 542)
    Flags: Up SNMP-Traps Encapsulation: ENET2
    VXLAN Endpoint Type: Remote, VXLAN Endpoint Address: 10.255.0.2, L2 Routing Instance: default-switch, L3 Routing Instance: default
    Input packets : 0
    Output packets: 0
    Protocol eth-switch, MTU: Unlimited
      Flags: Trunk-Mode

  Logical interface vtep.32770 (Index 570) (SNMP ifIndex 543)
    Flags: Up SNMP-Traps Encapsulation: ENET2
    VXLAN Endpoint Type: Remote, VXLAN Endpoint Address: 10.255.0.1, L2 Routing Instance: default-switch, L3 Routing Instance: default
    Input packets : 10   <<<<<<<<<<<<<<<<<<<<<<<
    Output packets: 10   <<<<<<<<<<<<<<<<<<<<<<<
    Protocol eth-switch, MTU: Unlimited
      Flags: Trunk-Mode



-------------------------------------------------------------------------------------------------------
Ping from thre BMS2:
--------------------
[root@bms2 ~]# nping 192.168.100.10 --udp -p 8080 --mtu 1400 -c 10


{master:0}
root@Leaf2> clear interfaces statistics vtep

{master:0}
root@Leaf2> show interfaces vtep
. . . .
  Logical interface vtep.32769 (Index 569) (SNMP ifIndex 542)
    Flags: Up SNMP-Traps Encapsulation: ENET2
    VXLAN Endpoint Type: Remote, VXLAN Endpoint Address: 10.255.0.2, L2 Routing Instance: default-switch, L3 Routing Instance: default
    Input packets : 1
    Output packets: 1
    Protocol eth-switch, MTU: Unlimited
      Flags: Trunk-Mode

  Logical interface vtep.32770 (Index 570) (SNMP ifIndex 543)
    Flags: Up SNMP-Traps Encapsulation: ENET2
    VXLAN Endpoint Type: Remote, VXLAN Endpoint Address: 10.255.0.1, L2 Routing Instance: default-switch, L3 Routing Instance: default
    Input packets : 10  <<<<<<<<<<<<<<<<<<<<<<<<<<<
    Output packets: 10  <<<<<<<<<<<<<<<<<<<<<<<<<<
    Protocol eth-switch, MTU: Unlimited
      Flags: Trunk-Mode