Juniper EX9251

Architecture 

Single data, control, and management plane 

Power 

Holds up to two power supplies:
• -40 to -72 V DC (1+1 redundancy)
• Autosensing 120/240 V AC (1+1 redundancy)
• Maximum power draw: 312 W (DC), 300 W (AC)

Cooling 

Internally redundant fan tray with front-to-back airflow

Weight (fully loaded) 

23.15 lb (10.5 kg) 

Maximum throughput 

Up to 800 Gbps 

Routing Engine (RE) 

Integrated single RE
1.6 GHz, 8 core Intel Xeon processor
Up to 32 gigabytes DRAM
Solid-state drive (SSD) (up to 100 GB)
Console, auxiliary serial, and Ethernet management
ports
USB storage interface

Operating system 

Juniper Networks Junos operating system 

High availability 

Hardware designed for continuous operation:
• Secure, modular architecture that isolates faults
• Separate control and forwarding planes that
enhance scalability and resiliency

Layer 2 features 

Up to 1 million MAC addresses
Up to 512,000 Address Resolution Protocol (ARP) entries with mid-scale (ML) license (256,000 entries without ML license)
Up to 512,000 forwarding information base (FIB) entries with ML license (256,000 entries without ML license)
Jumbo frames (9192 bytes maximum)
32,000 VLANs
VLAN Registration Protocol
802.3ad—Link Aggregation Control Protocol (LACP)
802.1D—Spanning Tree Protocol (STP)
802.1w—Rapid Spanning Tree Protocol (RSTP)
802.1s—Multiple Spanning Tree Protocol (MSTP)
VLAN Spanning Tree Protocol (VSTP)
Layer 2 Protocol Tunneling (L2PT)

Layer 3 features 

1 million IPv4 routing information base (RIB)
1 million IPv6 RIB
Static routing
RIP v1/v2
OSPF v1/v2
OSPF v3
Filter-based forwarding
Virtual Router Redundancy Protocol (VRRP)
IPv6
Bidirectional Forwarding Detection (BFD)
Virtual routers
BGP (Advanced Feature license)
IS-IS (Advanced Feature license)

Hardware tunneling 

GRE tunnels
MPLS capabilities (Advanced Feature License)
VPLS
BGP/MPLS VPNs
Ethernet VPNs

Multicast 

Up to 256,000 IPv4 multicast routes
Up to 256,000 IPv6 multicast routes
Internet Group Management Protocol (IGMP) v1/v2/v3
IGMP snooping
Multicast Listener Discovery (MLD) v1/v2
MLD snooping
Protocol Independent Multicast PIM-SM, PIM-SSM, PIM-DM
Multicast Source Discovery Protocol (MSDP)

Firewall flters 

Ingress and egress L2-L4 access control lists (ACLs):
Port ACLs
VLAN ACLs
Router ACLs
Control plane denial-of-service (DoS) protection

Quality of service (QoS) 

16,000 policers per chassis
8 egress queues per port
Weighted random early detection (WRED) scheduling
Weighted round-robin (WRR) queuing
Strict priority queuing

Virtualization 

Integration with Juniper Contrail Platform
Integration with VMware NSX vSphere
Network virtualization protocols such as VXLAN
VXLAN L2 and L3 gateway
EVPN and VPLS for DCI

Management 

Junos OS CLI
Junos XML management protocol
SNMP v1/v2/v3
RADIUS
TACACS+
Extensive MIB support
Firewall-based port mirroring
Link Layer Discovery Protocol (LLDP)
Advanced Insight Solutions (AIS)