L3-VPNs are ideal for many-to-many (peer-to-peer) or one-to-many (central-site-to-satellite) environments, where each site can be allocated bandwidth according to its own requirements. Each site can support bandwidths from 155Mbps to 100Gbps (subject to availability).​This service allocates unique VLAN (virtual local area network) identifiers to each L3-VPN to ensure data isolation across the GÉANT network, giving assured performance and secur​​ity. The GÉANT L3-VPN service provides NRENs with the backbone infrastructure to enable custom VPN services for their users across the GÉANT backbone. VPNs are ideal for many-to-many (pee​r-to-peer) or one-to-many (central-site-to-satellite) environments, where each site can be allocated bandwidth according to its own requirements. Each site can support bandwidths from 155Mbps to 100Gbps (subject to availability).