Routing device having integrated MPLS-aware firewall
A firewall and stateful firewall technology, applied in the field of computer networks, can solve the problems of increasing the number of devices, increasing the configuration and management burden of service providers, etc.
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[0030] figure 1 is a block diagram illustrating an exemplary network environment 2 in which a service provider network 4 provides connectivity between customer virtual private network (VPN) sites 6A-6N (collectively VPN sites 6). exist figure 1 In the example of , VPN site 6 includes customer edge (CE) routers 8A-8N connected to provider edge (PE) routers 10A-10N of service provider network 4 via network links 16A-16N.
[0031] In one example, the service provider network 4 supports a provider provisioned VPN (PPVPN). PE routers 10A-10N (collectively PE routers 10) route messages for customer VPN sites 6 through service provider network 4 and possibly through other intermediate networks. The service provider network typically includes a set of PE routers 10 at the edge of the network interconnected with internal routers and other network devices via high-speed network links. Such as figure 1 As shown, the internal router may be a Label Switching Router (LSR) providing a Mu...
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