Service Providers Knowledge Base

Introduction ZTP or Zero Touch Provisioning was introduced to reduce the human interaction in the provision of XR devices. ZTP helps in auto provisioning after the software installation of the router using iPXE.  This document is intended for first t...

The interfaces of P and PE routers are enabled for frame mode MPLS with the mpls ip interface subcommand and all P and PE routers use a common IGP (EIGRP with AS 200):   P#show mpls ldp neighbor     Peer LDP Ident: 1.1.1.1:0; Local LDP Ident 3.3.3.3...

MPLS has been the leader in providing VPN service in the past days with the association of LDP for label distribution to achieve the necessary operation for traffic forwarding (not to forget that BGP is used in some cases for label assignment, but th...

Introduction ASR9K XR and ASR903 (IOSXE) ISIS behaviour Problem ASR9K preferring ISIS L2 for prefix (Lo0) of peer ASR903 (IOS-XE) due to which RAN instance interface is getting preferred Solution  IOS XR & IOSXE behaviour    IOSXE & IOSXE behaviour...

The Problem: A Service Provider’s customer would like to acquire service that would provide them with a certain bandwidth guarantee, for e.g to run a backup service.The Solution: Bandwidth on Demand engine in WAE will compute a path that will guarant...

The Problem: Identifying the right amount to augment capacity to meet traffic demand is a guesswork at best. In addition, circuit activation across the different layers would be an arduous process.The Solution: Orchestrated circuit activation based o...

 The Problem: Network state changes continuously and operators are having problem tracking and reacting to rapid network changes that often lead to congestions.The Solution: With Crosswork, WAE, SR-PCE and Segment Routing, closed loop network state t...

Introduction Telemetry configuration & troubleshooting steps Below is the list of telemetry sensors which can be used for system health monitoring. It includes ASR9K & NCS5500 platform    Configuration    Sample    telemetry model-driven  destinatio...

The Cisco Document Team has posted an article. This document describes the procedure to troubleshoot incomplete diagnostics.sh script execution in Cisco Policy Suite (CPS). Know of something that needs documenting? Share a new ...

Introduction BFD between ASR9K-XR (Bundle-Ether) and ASR903 - XE (Port-channel)   Problem BFD over Port channel of ASR903 down   Solution   ASR903 Configuration of Port-channel & BFD    bfd-template single-hop AG1-ASR9K  interval microseconds min-tx ...

IntroductionMPLS VPN FundamentalsMPLS VPN ConfigurationRelated Information  Introduction  Vinit Jain is a technical lead with the High-Touch Technical Support (HTTS)  team supporting customers in areas of routing, MPLS, TE, IPv6, and multicast.  He a...

XR-vm - CLI's Description show context look for any process crash, review time stamp[if it is too old, then no immediate action needed]show redundancyverify if standby state  is Ready and NSR-Readyshow proc cpu | exclude " 0%"look for processes ho...

IntroductionBefore we startHigh level forwarding overviewTroubleshooting fabric issues Steps to debug packet drops Step 1) Look for active PFM alarms on LC as well as RSPs.Step 2) Check if your hardware FPGA versions are up-to-date Step 3) Follow th...

Introduction:Label Switched Multicast (LSM):Why LSM ?MPLS vs IP:LSM FORWARDING:Advantages of MPLS over IP:Multicast LDP:MLDP - FEC:Multicast LSP Types:MP2MP – Basic Operation:P2MP – Basic Operation:LSP-VIF:MVPN:Related Information: Introduction: In t...

OverviewMonitoring Power-supplies is done using the ENTITY-MIB (RFC-2737) and MIBs which extend/supplement the ENTITY-MIB.  The ENTITY-MIB’s entPhysicalTable defines the MIB identifierfor an inventory item, entPhysicalIndex, which is used by the othe...