Operate and maintain
Documents under this category provide functional descriptions and procedures for configuring, operating, and maintaining 7705 SAR software.
- Basic System Configuration Guide
  This guide provides an overview of the CLI and describes 7705 SAR boot options file (BOF) configuration, file system management, and basic system management such as node timing and synchronization.
- Interface Configuration Guide
  This guide describes the functionality of the 7705 SAR cards, modules, and ports and how to configure these components.
- MPLS Guide
  This guide describes how to configure MPLS, RSVP-TE, PCEP, and LDP protocols on the 7705 SAR.
- Quality of Service Guide
  This guide describes the Quality of Service (QoS) functionality provided by the 7705 SAR and how to configure and implement QoS on the router.
- Router Configuration Guide
  This guide describes how to configure logical IP routing interfaces, VRRP filtering, routing policies, and the cflowd tool on the 7705 SAR.
- Routing Protocols Guide
  This guide describes how to configure unicast routing protocols (OSFP, IS-IS, BGP, RIP) and multicast routing protocols (IGMP, MLD, PIM, MSDP) supported on the 7705 SAR.
- Services Guide
  This guide describes how to configure service parameters such as service access points (SAPs) and service destination points (SDPs), Layer 2 and Layer 3 services, security functions (IPSec), and encryption functions (NGE) on the 7705 SAR.
- System Management Guide
  This guide describes how to configure system security and access features, SNMP functionality, and event and accounting logs on the 7705 SAR.

MACsec capability and encryption offset

The IEEE 802.1x-2010 standard identifies the following fields in the MKAPDU:

MACsec capability
desired

MACsec capability signals whether MACsec is capable of integrity and confidentiality. The following table describes the basic settings for MACsec capability.

Table 1. MACsec capability settings
Setting	Description
0	MACsec is not implemented
1	Integrity without confidentiality
2	The following are supported: integrity without confidentiality integrity and confidentiality with a confidentiality offset of 0
3	The following are supported: Integrity without confidentiality Integrity and confidentiality with a confidentiality offset of 0, 30, or 50

The 7705 SAR supports setting 3.

An encryption offset of 0, 30, or 50 starts from the byte after the SecTAG field (802.1AE header). Ideally, the encryption offset should be configured for IPv4 (offset 30) and IPv6 (offset 50) to leave the IP header in clear text. This allows routers and switches to use the IP header for LAG or ECMP hashing.

October 30, 2024