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Data Center Fabric Reference Design Scaling Summary for Junos OS Release 20.2R2

 

This section provides the scale numbers for Juniper Networks switches running Junos OS Release 20.2R2 and assuming various roles in the following Data Center Fabric validated reference designs:

  • Centrally routed bridging overlay

  • Edge-routed bridging overlay

  • Collapsed spine topology

Scaling for Juniper Networks Switches In a Centrally Routed Bridging Overlay

Table 1 provides a summary of the scale numbers for a centrally routed bridging overlay. For this reference design, we used the following devices, which are running Junos OS Release 20.2R2:

  • Spine and border spine—QFX10002-36Q/72Q, QFX10008, and QFX10016

  • Leaf—QFX5120-48T

These numbers do not represent the maximum supported scale. They represent only the initial solution testing performed.

Table 1: Scaling for Juniper Networks Switches In a Centrally Routed Bridging Overlay

Attributes

Fabric

Spine/Border Spine

Leaf

 

Switching instances

1

1

1

VLANS/bridge domains/VNIs

4,000

4,000

2,000

MAC addresses

41,000

41,000

34,000

ARP entries1

40,000

40,000

N/A

ND entries (includes link local)1

25,000

25,000

N/A

Number of VTEPs (leaf tunnels)2

210

210

210

Ethernet segment identifiers (ESIs)

563

4

4 (483)

IRB interfaces

4,000

4,000

N/A

OSPFv2 sessions on IRB interfaces

804

804

N/A

IS-IS sessions on IRB interfaces

204

204

N/A

BGP sessions on IRB interfaces

525

525

N/A

VRF instances

1,000

1,000

N/A

Externally learned EVPN Type 5/IPVPN routes

136,000 total routes

70,000 active routes

136,000 total routes

70,000 active routes

N/A

Multicast *,G

10,300

10,300

N/A

Multicast S,G

10,300

10,300

N/A

IGMPv2 snooping

10,300

10,300

10,300

Selective Multicast Ethernet (SMET) routes (EVPN type-6 routes)

10,300

10,300

10,300

1We support a total of 65,000 ARP and ND entries. Although our tests resulted in 40,000 ARP entries and 25,000 ND entries, we support any combination of ARP and ND entries, as long as the maximum total of both is 65,000.

2The number of VTEPs (leaf tunnels) shown above was the result of multidimensional testing. A higher scale of 500 was achieved in unidimensional testing.

3Only QFX5110 switches as Layer 2 leaf devices were tested with 48 ESIs.

Scaling for Juniper Networks Switches In An Edge-Routed Bridging Overlay

Table 2 provides the scale numbers for an edge-routed bridging overlay. For this reference design, we used the following devices, which are running Junos OS Release 20.2R2:

  • Server leaf:

    • QFX10002-36Q/72Q and QFX10008

    • QFX5120-48T

  • Border leaf—QFX10002-60C

These numbers do not represent the maximum supported scale. They represent only the initial solution testing performed.

Table 2: Scaling for Juniper Networks Switches In an Edge-Routed Bridging Overlay

Attributes

Fabric

Server Leaf (QFX10002-36Q, QFX10002-72Q, QFX10008)

Server Leaf (QFX5120-48T)

Border Leaf

 

Switching instances

1

1

1

1

VLANS/bridge domains/VNIs

4,000

4,000

1,000

2,000

MAC addresses

40,000

40,000

16,000

25,000

ARP entries1

40,000

40,000

16,000

15,000

ND scale (incudes link local)1

25,000

25,000

12,000

25,000

Number of VTEPs (leaf tunnels)

210

210

210

210

ESIs

160

160

2

4

IRB interfaces

4,000

4,000

1,000

2,000

OSPFv2 sessions on IRB interfaces

810

8

N/A

810

IS-IS sessions on IRB interfaces

204

N/A

N/A

200

BGP sessions on IRB interfaces

500

8

N/A

500

VRF instances

1,000

1,000

250

500

Externally learned EVPN Type 5/IPVPN routes

100,000

5,000

5,000

76,000

Multicast *,G

10,200

N/A

N/A

N/A

Multicast S,G

10,200

N/A

N/A

N/A

IGMPv2 snooping

10,200

10,200

10,200

N/A

1We support a total of 65,000 ARP and ND entries. We support any combination of ARP and ND entries, as long as the maximum total of both is 65,000.

Scaling for Juniper Networks Switches In a Collapsed Spine Topology

Table 3 provides the scale numbers for a collapsed spine topology. For this reference design, we used the following device, which is running Junos OS Release 20.2R2:

  • Collapsed spine—QFX10002-36Q/72Q/60C, QFX10008, and QFX5120-32C

These numbers do not represent the maximum supported scale. They represent only the initial solution testing performed.

Table 3: Scaling for Juniper Networks Switches In a Collapsed Spine Topology

Attributes

Fabric

Collapsed Spine (QFX10002-36Q, QFX10002-72Q, QFX10002-60C, QFX10008)

Collapsed Spine (QFX5120-32C)

 

Switching instances

1

1

1

VLANS/bridge domains/VNIs

1,200

1,200

1,200

MAC addresses

4,000

4,000

4,000

ARP entries

4,000

4,000

4,000

ND entries (includes link local)

8,000

8,000

8,000

Number of VTEPs (leaf tunnels)

4

4

4

ESIs

172

160

12

IRB interfaces

1,000

1,000

1,000

OSPFv2 sessions on IRB interfaces

8

8

8

IS-IS sessions on IRB interfaces

8

8

8

BGP sessions on IRB interfaces

8

8

8

VRF instances

200

200

200

Externally learned EVPN type-5 routes

5,000

5,000

5,000

Multicast *,G

2,000

2,000

N/A

Multicast S,G

9,000

9,000

N/A

IGMPv2 snooping

2,400

N/A

2,400

V, Gs

4,800

4,800

2,400