ERX-310, ERX-7xx, and ERX-14xx System Maximums
The following tables provide system maximums for the ERX-310, ERX-7xx, and ERX-14xx routers.
General System Maximums
Table 1 lists some general system maximums for the E-series routers.
Sessions per chassis (simultaneous Telnet + FTP + SSH, in any combination)
Physical and Logical Density Maximums
Table 2 lists physical and logical density maximums for the E-series routers. The following notes are referred to in Table 2:
- Wire rate indicates the port density that supports maximum (wire-rate) performance. Oversubscribed indicates the port density possible when you are willing to accept less than wire-rate performance by oversubscribing the available fabric bandwidth. The ERX-310 and ERX-1440 routers do not support oversubscription; port densities for these models indicate wire-rate performance.
- For information about bandwidth and line-rate considerations for the GE-2 line module and its corresponding GE-2 APS I/O module on the ERX-1440 router, see JUNOSe Physical Layer Configuration Guide, Chapter 6, Configuring Ethernet Interfaces.
Link Layer Maximums
Table 3 lists physical and logical density maximums for the E-series routers. The following notes are referred to in Table 3:
- The limit of DHCP relay host routes can reduce the effective number of dynamic bridged Ethernet interfaces. For example, on the ERX-1440 router, this DHCP limit may reduce the effective maximum of dynamic bridged Ethernet interfaces from 48,000 to 40,000.
- Up to 32,000 subscribers and clients are supported on PPP/ATM and PPPoE/ATM with dynamic interfaces. Interface flapping tests have been qualified for 16,000 subscribers and interfaces.
- The ERX-1440 router supports a maximum of 48,000 interfaces of all types combined. You can use either all dynamic interfaces or a combination of dynamic and static interfaces to achieve this maximum. For bridged Ethernet, IP network, and PPP interfaces, the ERX-1440 router supports a maximum of 32,000 static major interfaces. Although the ERX-1440 router supports a maximum of 48,000 static major interfaces for PPPoE, the PPPoE static limit is enforced at the subinterface level, which has a limit of 32,000.
The ERX-710 and ERX-1410 routers support a maximum of 32,000 interfaces of all types combined; the ERX-310 and ERX-705 routers support a maximum of 16,000 interfaces of all types combined. For these routers, the interfaces can be any combination of dynamic or static.
Dynamic bridged Ethernet interfaces can be affected by the DHCP relay host route limit. See Note 1.
Routing Protocol Maximums
Table 4 lists routing protocol maximums for the E-series routers. The following notes are referred to in Table 4:
- The total set of FTEs can be shared by interfaces, next hops, ECMP sets, VRs, and VRFs. Next-hop FTEs identify the next hop on multiaccess media, such as ATM multipoint, Ethernet, or bridged Ethernet. Each VR or VRF consumes three entries. Each interface, next hop, and ECMP set consumes a single entry. One FTE is reserved for internal use, and the system software limits the number of FTEs used by interfaces to a maximum of 32,000. The remaining FTEs can be shared across the other types.
- There is no per-VR limit; all multicast routes can be on a single VR or present across multiple VRs.
- The maximum number of interfaces can be achieved by any combination; for example, two streams each being replicated to 32,768 interfaces; 16,384 streams each being replicated four times; or any other combination.
- The ERX-1440 router supports a maximum of 48,000 interfaces of all types combined. You can use either all dynamic interfaces or a combination of dynamic and static interfaces to achieve this maximum. The ERX-1440 router supports a maximum of 32,000 static PPP/PPPoE interfaces and a maximum of 36,500 static IP network interfaces. Bridged Ethernet does not enforce a limit so IP interfaces created on Bridged Ethernet may scale to the IP maximum of 36,500.
The ERX-710 and ERX-1410 routers support a maximum of 32,000 IP network interfaces; the ERX-310 and ERX-705 models support a maximum of 16,000 IP network interfaces. For all these models, the interfaces can be any combination of dynamic or static.
- An ERX-710 or ERX-1410 router with 512 MB of memory on its SRP module can support no more than 20,000 numbered IPv6 interfaces. These routers can support 32,000 IPv6 numbered interfaces if the SRP module has 1 GB of memory.
- These values are subject to limitations on available SRP module memory, which varies according to your router configuration.
- This maximum is not valid for Frame Relay. The Frame Relay maximum is 1000 circuits over MPLS per line module, because only 1000 Frame Relay DLCIs are permitted per line module.
- Dynamic values represent typical limits that may vary depending on configuration details and actual dynamic behavior. For dynamic values only, multiple server modules (SMs or TSMs) in a chassis can improve the values as long as the multiple server modules are online and the number of virtual routers configured with NAT or stateful firewall is greater than or equal to the number of server modules. If a server module fails, the load is redistributed to the remaining server modules, with a consequent reduction in aggregate capacity.
- Static and dynamic translations occupy the same table; therefore, the number of static translation entries present in the table reduces the room for dynamic entries.
Policy and QoS Maximums
Table 5 lists routing protocol maximums for the E-series routers. The following notes are referred to in Table 5:
- The OC48 line module supports only 131,071 entries. The GE-2 line module supports only 65,535 entries.
- The E-series router supports two sizes of policies: 8127 policies, each with a maximum of 32 classifiers, and 16,255 policies, each with a maximum of 16 classifiers. A combination of the two sizes of policies is also supported, in which case the total number of policies is between 8127 and 16,255, depending on the actual configuration.
- To achieve 16,255 polices per line module with B-RAS protocols, the module must have 256 MB of memory.
Tunneling Maximums
Table 5 lists routing protocol maximums for the E-series routers. The following notes are referred to in Table 5:
- The SM and TSM support any combination of DVMRP, GRE, and L2TP tunnels up to a maximum of 8000 tunnels; however, no more than 4000 tunnels can be DVMRP or GRE tunnels in any combination. The ISM supports any combination of DVMRP, GRE, and L2TP tunnels over IPSec, up to a maximum of 5000 tunnels; however, no more than 4000 tunnels can be DVMRP or GRE tunnels.
- You can have no more than 8000 L2TP/IPSec sessions per chassis.
- The ERX-1440 maximum requires a license that supports up to 32,000 L2TP LAC sessions per chassis (B-RAS license model number SW-SA32).