The document discusses Cisco's Layer 2 Resiliency and HP's IRF approaches to network resiliency. Large enterprise networks are typically constructed with multiple layers including an access layer of interconnected switches. Cisco and HP both aim to provide redundancy and alternate paths for traffic if a link or switch fails. HP's IRF allows grouping of switches into a single logical switch. Cisco's approach provides rapid failover and recovery at the network, device and design levels. Both have advantages like redundancy and high availability, but Cisco has some configuration limitations while HP provides simpler manageability and scalability.