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IP Routing
Configuration Examples and TechNotes
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Enhanced Interior Gateway Routing Protocol (EIGRP)
Routing Information Protocol (RIP)
Open Shortest Path First (OSPF)
Interior Gateway Routing Protocol (IGRP)
Enhanced Interior Gateway Routing Protocol (EIGRP)
Routing Information Protocol (RIP)
Border Gateway Protocol (BGP)
Classless Interdomain Routing (CIDR)
Multiprotocol BGP (MBGP)
Integrated Intermediate System-to-Intermediate System (IS-IS)
Cisco Optimized Edge Routing (OER)
Interior Gateway Protocol (IGP)
Enhanced Interior Gateway Routing Protocol (EIGRP)
DMVPN to FlexVPN Soft Migration Configuration Example
24/Feb/2014
EIGRP on SVTI, DVTI, and IKEv2 FlexVPN with the "IP[v6] Unnumbered" Command Configuration Example
18/Sep/2013
FlexVPN Migration: Hard Move from DMVPN to FlexVPN on a Different Hub
09/Jan/2015
Routing Information Protocol (RIP)
ASA/PIX with RIP Configuration Example
22/May/2008
How to Populate Dynamic Routes Using Reverse Route Injection
02/Feb/2006
Open Shortest Path First (OSPF)
Configuring OSPF Authentication on a Virtual Link
Initial Configurations for OSPF over a Point-to-Point Link
Initial Configurations for OSPF Over Broadcast Media
Initial Configurations for OSPF over Frame Relay Subinterfaces
MPLS Basic Traffic Engineering Using OSPF Configuration Example
Configuring a GRE Tunnel over IPsec with OSPF
OSPF Routers Connected by a Multi-Access Network
How OSPF Propagates External Routes into Multiple Areas
OSPF Routers Connected by a Numbered Point-to-Point Link
OSPF Inter-Area Routing
OSPF Routers Connected by an Unnumbered Serial Link
OSPF Not So Stubby Area Type 7 to Type 5 Link-State Advertisement Conversion
How OSPF Injects a Default Route into a Normal Area
OSPF Virtual Link
How OSPF Injects a Default Route into a Not So Stubby Area
OSPF Routers Connected by a Point-to-Multipoint Link
Adjust Administrative Distance for Route Selection in Cisco IOS Routers Configuration Example
OSPFv3 Virtual Link Configuration Example
Redistribute Connected Networks into OSPF with Subnet Keyword
Redistribute OSPFv3 Routes in BGP Configuration Example
Sample Configuration for OSPFv3
ASA/PIX with OSPF Configuration Example
Sample Configuration for Authentication in OSPF
Redistributing Between Classful and Classless Protocols: EIGRP or OSPF into RIP or IGRP
Guide to OSPF Application on the CSS 11000
Redistributing Routing Protocols
How to Populate Dynamic Routes Using Reverse Route Injection
Understanding Policy Routing
Host and Subnet Quantities
Configuring a Gateway of Last Resort Using IP Commands
Route-Maps for IP Routing Protocol Redistribution Configuration
ASA Release 9.2.1 OSPF Enhancements Configuration Example
OSPF Virtual Link
(ZIP - 54 KB)
OSPF as PE-CE Protocol and Loop-Prevention Techniques in MPLS L3 VPN Configuration Example
ASA/PIX with RIP Configuration Example
Configure OSPF Distance External Command Behaviour
Configure OSPF To Filter Type-5 LSAs
Configure OSPFv3 as PE-CE Protocol with Loop Prevention Techniques
Configure Redistribution of iBGP Routes Into OSPF
Exclusion of EIGRP, OSPF and BGP Messages from the Firepower Intrusion Inspection
Link LSA (LSA Type 8) and Intra-Area-Prefix (LSA Type 9)
Open Shortest Path First Prefix-Suppression
Interior Gateway Routing Protocol (IGRP)
Adjust Administrative Distance for Route Selection in Cisco IOS Routers Configuration Example
Filtering Routing Updates on Distance Vector IP Routing Protocols
Redistributing Between Classful and Classless Protocols: EIGRP or OSPF into RIP or IGRP
Redistributing Routing Protocols
IGRP Metric
Understanding Policy Routing
Host and Subnet Quantities
Configuring a Gateway of Last Resort Using IP Commands
Route-Maps for IP Routing Protocol Redistribution Configuration
Enhanced Interior Gateway Routing Protocol (EIGRP)
Configuring IPSec with EIGRP and IPX Using GRE Tunneling
EIGRP IPv6 Configuration Example
Failover with EIGRP Using VRF Configuration Example
Adjust Administrative Distance for Route Selection in Cisco IOS Routers Configuration Example
GRE over IPSec with EIGRP to Route Through a Hub and Multiple Remote Sites Configuration Example
EIGRP Message Authentication Configuration Example
Redistribute IPv6 BGP Default Route in EIGRPv6 Configuration Example
Mutual Redistribution Between EIGRP and BGP Configuration Example
DMVPN to FlexVPN Soft Migration Configuration Example
Filtering Routing Updates on Distance Vector IP Routing Protocols
Redistributing Between Classful and Classless Protocols: EIGRP or OSPF into RIP or IGRP
Redistributing Routing Protocols
Configuration Notes for the Implementation of EIGRP over Frame Relay and Low Speed Links
Understanding IPX-EIGRP
FlexVPN Migration: Hard Move from DMVPN to FlexVPN on a Different Hub
Understanding Policy Routing
Host and Subnet Quantities
Configuring a Gateway of Last Resort Using IP Commands
EIGRP on SVTI, DVTI, and IKEv2 FlexVPN with the "IP[v6] Unnumbered" Command Configuration Example
Route-Maps for IP Routing Protocol Redistribution Configuration
Configure Default-Route in EIGRP
Configure EIGRP Named Mode
Exclusion of EIGRP, OSPF and BGP Messages from the Firepower Intrusion Inspection
What Do EIGRP "Not On Common Subnet" Messages Mean?
Routing Information Protocol (RIP)
Sample Configuration for Authentication in RIPv2
Sample Configuration of Triggered Extensions to RIP
Adjust Administrative Distance for Route Selection in Cisco IOS Routers Configuration Example
Filtering Routing Updates on Distance Vector IP Routing Protocols
Redistributing Between Classful and Classless Protocols: EIGRP or OSPF into RIP or IGRP
Redistributing Routing Protocols
How to Populate Dynamic Routes Using Reverse Route Injection
Understanding Policy Routing
Host and Subnet Quantities
Configuring a Gateway of Last Resort Using IP Commands
Route-Maps for IP Routing Protocol Redistribution Configuration
Border Gateway Protocol (BGP)
Configuring the BGP Maximum-Prefix Feature
Configuring Single Router Mode Redundancy and BGP on a Cat6000 MSFC
Sample Configuration for iBGP and eBGP With or Without a Loopback Address
How to Use HSRP to Provide Redundancy in a Multihomed BGP Network
Load Sharing with BGP in Single and Multihomed Environments
Sample Configuration for Removing Private AS Numbers in BGP
Configuring the BGP Local-AS Feature
Sample Configuration for BGP with Two Different Service Providers (Multihoming)
Using BGP Community Values to Control Routing Policy in Upstream Provider Network
MP-EBGP Configuration Example
IPv6 BGP Prefix-Based Outbound Route Filtering Configuration Example
IPv6 BGP Route Reflector Configuration Example
Compatible Systems Setup Guides: BGP Configuration Guide
Adjust Administrative Distance for Route Selection in Cisco IOS Routers Configuration Example
Configuring and Verifying the BGP Conditional Advertisement Feature
Configure the IPv6 BGP Local Preference Feature
Configure IPv6 Black-Holing through Interface Null0
BGP Implementation Using 32-bit AS Number Configuration Example
MD5 Authentication Between BGP Peers Configuration Example
Allowas-in Feature in BGP Configuration Example
Redistribute IPv6 BGP Default Route in EIGRPv6 Configuration Example
Mutual Redistribution Between EIGRP and BGP Configuration Example
Redistribute OSPFv3 Routes in BGP Configuration Example
ASA/PIX: BGP through ASA Configuration Example
Multiprotocol BGP for IPv6 Configuration Example
BGP Case Studies
Using Regular Expressions in BGP
BGP Policy Accounting and BGP Policy Accounting Output Interface Accounting Features
FlexVPN Migration: Hard Move from DMVPN to FlexVPN on a Different Hub
How the bgp deterministic-med Command Differs from the bgp always-compare-med Command
Understanding Policy Routing
Host and Subnet Quantities
Configuring a Gateway of Last Resort Using IP Commands
ASR9000 Source-based Remotely Triggered Blackhole Filtering with RPL Next-hop Discard Configuration Example
Understanding BGP MED Attribute
Route-Maps for IP Routing Protocol Redistribution Configuration
ASA Border Gateway Protocol Configuration Example
ASA/PIX: BGP through ASA Configuration Example
(ZIP - 119 KB)
Configure a Secure eBGP Session with an IPsec VTI
How to Block One or More Networks From a BGP Peer
(ZIP - 43 KB)
Sample Configuration for BGP with Two Different Service Providers (Multihoming)
(ZIP - 47 KB)
Configuration and Verification VXLAN with MP-BGP EVPN Control Plane.
Configure BGP to advertise a Default Route on Cisco Nexus Switches
Configure IPV6 Remote Triggered Black Hole with IPv6 BGP
Exclusion of EIGRP, OSPF and BGP Messages from the Firepower Intrusion Inspection
Inter VRF Route Leaking with iBGP as PE to CE Routing Protocol
Understanding BGP Dynamic Segment Routing Traffic Engineering (SR-TE)
Virtual Extensible LAN and Ethernet Virtual Private Network
Classless Interdomain Routing (CIDR)
Host and Subnet Quantities
Multiprotocol BGP (MBGP)
MP-EBGP Configuration Example
IPv6 BGP Prefix-Based Outbound Route Filtering Configuration Example
Configure IPv6 Black-Holing through Interface Null0
Redistribute OSPFv3 Routes in BGP Configuration Example
Integrated Intermediate System-to-Intermediate System (IS-IS)
Configuring IS-IS for IP on Cisco Routers
Configuring IS-IS over IPv6
Configuring IS-IS Authentication
Adjust Administrative Distance for Route Selection in Cisco IOS Routers Configuration Example
Redistributing Routing Protocols
Uses of the Overload Bit with IS-IS
IS-IS Network Types and Frame Relay Interfaces
Understanding Policy Routing
Host and Subnet Quantities
Configuring a Gateway of Last Resort Using IP Commands
Route-Maps for IP Routing Protocol Redistribution Configuration
IS-IS Network Types and Frame Relay Interfaces
(ZIP - 52 KB)
IS-IS Adjacency and Area Types.
Cisco Optimized Edge Routing (OER)
Configure PfRv3 for External Interface Discovery
Interior Gateway Protocol (IGP)
Configure OSPF Distance External Command Behaviour
External LSA with Overlapping Subnets in OSPF
11/Nov/2013
IPv6 Traffic Filtering Using "prefix-list" Configuration Example
29/Mar/2012
Easy Virtual Network Configuration Example
04/Aug/2014
ATT-bit Filtering with CLNS Filter-Set Configuration Example
19/Aug/2014
Configure the AIGP Metric Attribute for BGP
16/Jun/2015
Configure the ASA for Redundant or Backup ISP Links
15/May/2015
OSPF Routing Loop/Sub-Optimal Routing between Cisco IOS and NXOS for External Routes Configuration Example
02/Jul/2014
OSPF Type-5 Route Calculation Configuration Example
05/Mar/2015
OSPF with Multi-Area Adjacency Configuration Example
31/Mar/2015
Configuration Example of MPLS L3VPNs with ISIS Remote LFA
24/Oct/2016
Configure Attach Bit Set
23/Mar/2018
Configure Easy Virtual Network with EIGRP Named Mode
15/Sep/2016
Configure LISP Multihop Mobility on Nexus
07/Jun/2018
Configure Learn-List and PfR-Map in PfRv2
22/Apr/2016
Configure Loop-Free Alternate Path with OSPFv2
07/Jun/2018
Configure Multicast Over LISP Phase 1
09/Jan/2018
Configure PfRv2 Performance Monitoring Methods
29/Jan/2019
Configure PfRv2 Traffic Control Mechanism With Static Route And Policy Based Routing
25/Jan/2016
Configure PfRv2 Traffic Control Mechanism with BGP or EIGRP
25/Jan/2016
Configure PfRv2 to load-balance over multiple WAN links.
25/Jan/2016
Configure Redistributing Internal BGP Routes into IGP
24/Oct/2016
Configure Route Leaking Between Global and VRF Routing Table without Next-Hop
07/Sep/2018
Configure and Troubleshoot LISP
27/Oct/2015
Ethernet MTU and TCP MSS Adjustment Concept for PPPoE Connections
12/Jan/2017
ISP Failover with Default Routes using IP SLA Tracking
30/Jan/2017
Support Documentation
All Support Documentation for this Series