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.

Shared EG between services

To share a single EG between multiple services, ensure the following rules are not violated:

The services must have the same peers.
If the service is VPRN it must use the same protocol (SR-ISIS or SR-OSPF) and the same algorithm.
The transport tunnel used for the services must be the same (if 1 and 2 are true, the same transport tunnel is used).
If the service is VPRN, autobind and Layer 3 spoke-SDP interfaces can have the same EG or different EGs.

The following figure shows an example of two encrypted services using the same tunnel and EG.

Figure 1. Two encrypted services both using the same tunnel and EG

When the EG is shared between multiple services, only a single MKA session is established between the peers. Both services use that MKA session with its PSK to secure the SAK. The MKA session distributes the SAK between the peers, and both services are encrypted with the same SAK.

October 28, 2026