Figure 10-9 Typical Vrouter Implementation; Configuring Virtual Routers - Lucent Technologies MAX 6000 Configuration Manual

Configuring Virtual Routers

A single MAX unit can support multiple, mutually exclusive routing tables, also called Virtual
Routers (VRouters).
Background
VRouters group routing interfaces in the MAX unit. Each VRouter has its own associated
routing table, ARP table, route cache, and address pools. In addition, each VRouter maintains
its own routing and packet statistics. If you do not configure any VRouters, the MAX unit's
router operates as it has in previous releases. When you configure one or more VRouters, the
main router operates as the global VRouter. Its group includes any interfaces that are not
explicitly grouped with a defined VRouter.
Figure 10-9. Typical VRouter implementation
Before Lucent Technologies introduced VRouters, the MAX unit maintained a single IP
routing table that enabled the router to reach any interface. In that context, each interface
known to the system required a unique address.
With VRouters, addresses must be unique within the VRouter's routing domain, but not
necessarily within the MAX unit. Because each VRouter maintains its own routing table, and
because it knows about only those interfaces that explicitly specify the same VRouter, private
networks do not maintain unique address spaces.
Current limitations
SNMP management does not present a view of the MAX on a per-VRouter basis. Errors and
events are not logged on a per-VRouter basis. The Syslog host defined in the system's Log
profile must be accessible to the main VRouter.
Only the main VRouter supports ATMP, PPTP, and OSPF.
MAX 6000/3000 Network Configuration Guide
MAX unit
with VRouter
Corporation A
Virtual Private Network
Setting Up Virtual Private Networks
Configuring Virtual Routers
WAN
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