Inter-AS MPLS VPN Option C is a highly scalable approach that enables end-to-end MPLS label switching across multiple Autonomous Systems (ASes) without exposing internal infrastructure details. Unlike
Option A (VRF-to-VRF peering) and Option B (MPLS label exchange via MP-eBGP), Option C uses BGP Labeled Unicast (BGP-LU) to distribute labels between ASes, allowing for efficient forwarding without needing ASBRs to maintain VPN routes. This method improves scalability, convergence, and traffic engineering capabilities, making it ideal for large service providers needing seamless MPLS VPN transport across global networks.
With full end-to-end MPLS switching, Option C eliminates double lookups, optimizing data plane efficiency.
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The default username and password for images used in this course is as follows, however you will hear new passwords during the course if the instructor changes the credentials:
Image name | Username | Password |
IOL images | No username | No password |
CSR1000v | Admin | Admin |
C8000v | Admin | admin |
Viptela devices | Admin | admin |
Windows Server | Administrator | Test123 |
IOS-XR | Admin | Enter new password |
Cisco ASA 802 | no username | no passwd, hit enter |
Cisco ASA 8.4.2, 9.1.5 | no username | no passwd, hit enter |
Cisco ASAv | no username | no passwd, hit enter |
Cisco IPS | cisco | ciscoips123 |
Cisco WSA | admin | ironport |
Cisco ESA | admin | ironport |
Cisco WAAS | admin | default |
Cisco XR9K | Cisco | Cisco |
Cisco NX9K | admin | admin |
