Source note · CUBE high availability
Cisco recommends port channels for the RG control and data interfaces because a single cable or switch path is a single point of failure that can leave both routers Active.
Checked 2026-09-25
A single connection using back-to-back cable or switch presents a single point of failure due to a faulty cable, port, or switch, resulting in error state where both routers are Active.
- Vendor
- Cisco
- Product
- CUBE
- Subsystem
- RG control and data links
- Deployment
- on-premises
- Region
- not restricted
- Release range
- IOS XE 17.6 onwards; current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - High Availability on Cisco 4000 Integrated Services Routers and Cisco Catalyst 8000 Series Edge Platforms — Cisco Systems · tier 2 current vendor documentation · Connection topology recommendations
Cite this note
APA
WarmTransfer. (2026, September 25). CUBE high availability: source note cube-high-availability-portchannel-rg-links. WarmTransfer. https://warmtransfer.net/knowledge/claims/cube-high-availability-portchannel-rg-links
BibTeX
@misc{warmtransfer-claim-cube-high-availability-portchannel-rg-links,
title = {CUBE high availability: source note cube-high-availability-portchannel-rg-links},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cube-high-availability-portchannel-rg-links},
note = {Source note cube-high-availability-portchannel-rg-links, checked 2026-09-25}
}