E320 System Maximums
The following tables provide system maximums for the E320 router.
General System Maximums
Table 7 lists some general system maximums for the E320 router.
Sessions per chassis (simultaneous Telnet + FTP + SSH, in any combination)
Physical and Logical Density Maximums
Table 8 lists physical and logical density maximums for the E320 router. The following notes are referred to in Table 8:
- Wire rate indicates the port density that supports maximum (wire-rate) performance. Oversubscribed indicates the port density possible if you are willing to accept less than wire-rate performance by oversubscribing the available fabric bandwidth.
OC3/STM-1 ATM ports per chassis
(ES2-S1 OC3-8 STM1 ATM IOAs)OC12/STM-4 ATM ports per chassis
(ES2-S1 OC12-2 STM4 ATM IOAs)OC12/STM-4 POS ports per chassis
(ES2-S1 OC12-2 STM4 POS IOAs)
Link Layer Maximums
Table 9 lists link layer maximums for the E320 router. The following notes are referred to in Table 9:
- The limit of DHCP relay host routes can reduce the effective number of dynamic bridged Ethernet interfaces. For example, this DHCP limit can reduce the effective maximum of dynamic bridged Ethernet interfaces from 48,000 to 40,000.
- DHCP relay is not notified of DHCP client deletions, so the host routes for deleted clients remain in DHCP relay until you permanently delete them with the set dhcp relay discard-access-routes command. DHCP relay can store a maximum of 100,000 host routes (although the E320 router supports a maximum of 40,000).
DHCP relay proxy is notified of DHCP client deletions and then deletes the client's host routes. Therefore, DHCP relay proxy never reaches the 100,000 limit for host routes.
- The E320 router supports a maximum of 48,000 interface columns 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 E320 router supports a maximum of 32,000 static major interfaces. Although the E320 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.
Dynamic bridged Ethernet interfaces can be affected by the DHCP relay host route limit. See Note 1.
Routing Protocol Maximums
Table 10 lists routing protocol maximums for the E320 router. The following notes are referred to in Table 10:
- 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 E320 router supports a maximum of 48,000 IP network interfaces. You can use either all dynamic interfaces or a combination of dynamic and static interfaces to achieve this maximum. However, the E320 router supports a maximum of 32,000 static IP network interfaces.
- These values are subject to limitations on available SRP module memory, which varies according to your router configuration.
Forwarding entries [(S,G) pairs] per chassis (See Note 2 on 75.)
IP/MPLS next hops (egress FECs; used currently to represent stacked labels in 2547 BGP/MPLS VPN applications and to represent the IP addresses of next-hop routers on Ethernet interfaces)
Policy and QoS Maximums
Table 11 lists policy and QoS maximums for the E320 router.
- Each line module can support a maximum of 16,382 egress interface attachments and 16,382 ingress interface attachments. No more than 8191 egress interface attachments can be IP and IPv6 interfaces combined; no more than 8191 egress interface attachments can be of all other interface types combined. Similarly, no more than 8191 ingress interface attachments can be IP and IPv6 interfaces combined; no more than 8191 ingress interface attachments can be of all other interface types combined. See E320 Module Guide, Appendix A, Protocol Support, for more information on protocol support.
ES2 4G LM combined GRE, L2TP (LAC only), MPLS, and VLAN interface attachments
ES2 4G LM combined GRE, L2TP (LAC only), MPLS, and VLAN interface attachments
Tunneling Maximums
Table 12 lists tunneling maximums for the E320 router. The following notes are referred to in Table 12:
- The ES2-S1 Service IOA supports 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.
- For more information about supported L2TP sessions and tunnels, see JUNOSe Broadband Access Configuration Guide, Chapter 6, Configuring L2TP.