# Lessons Discussion **URL:** https://forum.networklessons.com/c/lessons-discussion/8.md [Latest](https://forum.networklessons.com/latest.md) ยท [Categories](https://forum.networklessons.com/categories.md) --- ## [About the Lessons Discussion category](https://forum.networklessons.com/t/about-the-lessons-discussion-category/14)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 2\ **Last updated:** [September 2, 2022, 12:36pm UTC](https://forum.networklessons.com/t/about-the-lessons-discussion-category/14 "2022-09-02T12:36:08Z")
Each lesson that we publish has a topic here. Got questions? You can ask them here in the topic that matches the name of the lesson. --- ## [IPv6 over MPLS 6PE/6VPE](https://forum.networklessons.com/t/ipv6-over-mpls-6pe-6vpe/3118)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 27\ **Last updated:** [September 23, 2026, 9:11am UTC](https://forum.networklessons.com/t/ipv6-over-mpls-6pe-6vpe/3118 "2026-09-23T09:11:27Z")
This topic is to discuss the following lesson: https://networklessons.com/cisco/ccie-enterprise-infrastructureipv6-over-mpls-6pe-6vpe --- ## [VRRP (Virtual Router Redundancy Protocol)](https://forum.networklessons.com/t/vrrp-virtual-router-redundancy-protocol/1151)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 87\ **Last updated:** [September 21, 2026, 8:02am UTC](https://forum.networklessons.com/t/vrrp-virtual-router-redundancy-protocol/1151 "2026-09-21T08:02:21Z")
This topic is to discuss the following lesson: https://networklessons.com/cisco/ccie-enterprise-infrastructurevrrp-virtual-router-redundancy-protocol/ --- ## [NAT Virtual Interface](https://forum.networklessons.com/t/nat-virtual-interface/1337)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 47\ **Last updated:** [September 19, 2026, 11:47am UTC](https://forum.networklessons.com/t/nat-virtual-interface/1337 "2026-09-19T11:47:21Z")
This topic is to discuss the following lesson: https://networklessons.com/cisco/ccie-enterprise-infrastructurenat-virtual-interface/ --- ## [Cisco IOS NAT on a Stick Configuration Example](https://forum.networklessons.com/t/cisco-ios-nat-on-a-stick-configuration-example/1062)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 38\ **Last updated:** [September 17, 2026, 3:06pm UTC](https://forum.networklessons.com/t/cisco-ios-nat-on-a-stick-configuration-example/1062 "2026-09-17T15:06:19Z")
This topic is to discuss the following lesson: --- ## [MPLS VPN PE-CE OSPF Global Default Route](https://forum.networklessons.com/t/mpls-vpn-pe-ce-ospf-global-default-route/14590)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 12\ **Last updated:** [September 17, 2026, 6:24am UTC](https://forum.networklessons.com/t/mpls-vpn-pe-ce-ospf-global-default-route/14590 "2026-09-17T06:24:52Z")
This topic is to discuss the following lesson: --- ## [How to configure OSPF Summarization](https://forum.networklessons.com/t/how-to-configure-ospf-summarization/923)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 93\ **Last updated:** [September 17, 2026, 6:19am UTC](https://forum.networklessons.com/t/how-to-configure-ospf-summarization/923 "2026-09-17T06:19:55Z")
This topic is to discuss the following lesson: --- ## [Automatic Private IP Addressing (APIPA)](https://forum.networklessons.com/t/automatic-private-ip-addressing-apipa/58845)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 0\ **Last updated:** [September 16, 2026, 12:45pm UTC](https://forum.networklessons.com/t/automatic-private-ip-addressing-apipa/58845 "2026-09-16T12:45:24Z")
This topic is to discuss the following lesson: --- ## [IP Address Classes: A, B, C, D and E Explained](https://forum.networklessons.com/t/ip-address-classes-a-b-c-d-and-e-explained/58844)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 0\ **Last updated:** [September 16, 2026, 12:17pm UTC](https://forum.networklessons.com/t/ip-address-classes-a-b-c-d-and-e-explained/58844 "2026-09-16T12:17:44Z")
This topic is to discuss the following lesson: --- ## [IPv4 vs IPv6](https://forum.networklessons.com/t/ipv4-vs-ipv6/58843)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 0\ **Last updated:** [September 16, 2026, 9:50am UTC](https://forum.networklessons.com/t/ipv4-vs-ipv6/58843 "2026-09-16T09:50:45Z")
This topic is to discuss the following lesson: --- ## [How to configure OSPF Default Route](https://forum.networklessons.com/t/how-to-configure-ospf-default-route/934)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 50\ **Last updated:** [September 16, 2026, 5:52am UTC](https://forum.networklessons.com/t/how-to-configure-ospf-default-route/934 "2026-09-16T05:52:50Z")
This topic is to discuss the following lesson: --- ## [Policy NAT](https://forum.networklessons.com/t/policy-nat/3881)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 21\ **Last updated:** [September 16, 2026, 5:19am UTC](https://forum.networklessons.com/t/policy-nat/3881 "2026-09-16T05:19:51Z")
This topic is to discuss the following lesson: https://networklessons.com/cisco/ccie-enterprise-infrastructurepolicy-nat --- ## [EIGRP Passive Interface](https://forum.networklessons.com/t/eigrp-passive-interface/1243)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 18\ **Last updated:** [September 15, 2026, 4:51am UTC](https://forum.networklessons.com/t/eigrp-passive-interface/1243 "2026-09-15T04:51:36Z")
This topic is to discuss the following lesson: --- ## [OSPF Multi-Area Configuration](https://forum.networklessons.com/t/ospf-multi-area-configuration/1698)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 60\ **Last updated:** [September 14, 2026, 5:44am UTC](https://forum.networklessons.com/t/ospf-multi-area-configuration/1698 "2026-09-14T05:44:02Z")
This topic is to discuss the following lesson: --- ## [VRF Lite Route Leaking](https://forum.networklessons.com/t/vrf-lite-route-leaking/2424)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 101\ **Last updated:** [September 14, 2026, 5:38am UTC](https://forum.networklessons.com/t/vrf-lite-route-leaking/2424 "2026-09-14T05:38:02Z")
This topic is to discuss the following lesson: --- ## [How to configure EIGRP Summarization](https://forum.networklessons.com/t/how-to-configure-eigrp-summarization/886)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 50\ **Last updated:** [September 14, 2026, 4:44am UTC](https://forum.networklessons.com/t/how-to-configure-eigrp-summarization/886 "2026-09-14T04:44:02Z")
This topic is to discuss the following lesson: --- ## [OSPF Passive Interface](https://forum.networklessons.com/t/ospf-passive-interface/1254)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 30\ **Last updated:** [September 12, 2026, 5:25am UTC](https://forum.networklessons.com/t/ospf-passive-interface/1254 "2026-09-12T05:25:39Z")
This topic is to discuss the following lesson: --- ## [MPLS Layer 3 VPN Explained](https://forum.networklessons.com/t/mpls-layer-3-vpn-explained/1287)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 222\ **Last updated:** [September 12, 2026, 4:53am UTC](https://forum.networklessons.com/t/mpls-layer-3-vpn-explained/1287 "2026-09-12T04:53:37Z")
This topic is to discuss the following lesson: --- ## [OSPF Router ID](https://forum.networklessons.com/t/ospf-router-id/1256)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 36\ **Last updated:** [September 11, 2026, 5:17am UTC](https://forum.networklessons.com/t/ospf-router-id/1256 "2026-09-11T05:17:02Z")
This topic is to discuss the following lesson: --- ## [Any Transport Over MPLS (AToM)](https://forum.networklessons.com/t/any-transport-over-mpls-atom/1025)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 76\ **Last updated:** [September 9, 2026, 4:28am UTC](https://forum.networklessons.com/t/any-transport-over-mpls-atom/1025 "2026-09-09T04:28:12Z")
This topic is to discuss the following lesson: --- ## [IP Directed-Broadcast on Cisco IOS](https://forum.networklessons.com/t/ip-directed-broadcast-on-cisco-ios/1327)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 18\ **Last updated:** [September 6, 2026, 8:27am UTC](https://forum.networklessons.com/t/ip-directed-broadcast-on-cisco-ios/1327 "2026-09-06T08:27:19Z")
This topic is to discuss the following lesson: --- ## [BGP Extended Access-List Filtering](https://forum.networklessons.com/t/bgp-extended-access-list-filtering/1294)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 60\ **Last updated:** [September 4, 2026, 4:31am UTC](https://forum.networklessons.com/t/bgp-extended-access-list-filtering/1294 "2026-09-04T04:31:04Z")
This topic is to discuss the following lesson: --- ## [HSRP Object Tracking Interface](https://forum.networklessons.com/t/hsrp-object-tracking-interface/58839)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 0\ **Last updated:** [September 3, 2026, 12:11pm UTC](https://forum.networklessons.com/t/hsrp-object-tracking-interface/58839 "2026-09-03T12:11:21Z")
This topic is to discuss the following lesson: --- ## [Cisco Discovery Protocol (CDP) Packet Header](https://forum.networklessons.com/t/cisco-discovery-protocol-cdp-packet-header/58838)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 0\ **Last updated:** [September 2, 2026, 12:35pm UTC](https://forum.networklessons.com/t/cisco-discovery-protocol-cdp-packet-header/58838 "2026-09-02T12:35:06Z")
This topic is to discuss the following lesson: --- ## [Multicast PIM Bootstrap (BSR)](https://forum.networklessons.com/t/multicast-pim-bootstrap-bsr/1340)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 56\ **Last updated:** [September 1, 2026, 7:08am UTC](https://forum.networklessons.com/t/multicast-pim-bootstrap-bsr/1340 "2026-09-01T07:08:56Z")
This topic is to discuss the following lesson: https://networklessons.com/cisco/ccie-enterprise-infrastructuremulticast-pim-bootstrap-bsr/ --- ## [BGP Route Reflector](https://forum.networklessons.com/t/bgp-route-reflector/1131)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 135\ **Last updated:** [August 31, 2026, 4:44am UTC](https://forum.networklessons.com/t/bgp-route-reflector/1131 "2026-08-31T04:44:32Z")
This topic is to discuss the following lesson: --- ## [MPLS VPN PE-CE OSPF Default Route](https://forum.networklessons.com/t/mpls-vpn-pe-ce-ospf-default-route/14478)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 12\ **Last updated:** [August 31, 2026, 3:45am UTC](https://forum.networklessons.com/t/mpls-vpn-pe-ce-ospf-default-route/14478 "2026-08-31T03:45:47Z")
This topic is to discuss the following lesson: --- ## [MPLS Layer 3 VPN PE-CE OSPF Sham Link](https://forum.networklessons.com/t/mpls-layer-3-vpn-pe-ce-ospf-sham-link/1939)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 20\ **Last updated:** [August 29, 2026, 3:31am UTC](https://forum.networklessons.com/t/mpls-layer-3-vpn-pe-ce-ospf-sham-link/1939 "2026-08-29T03:31:56Z")
This topic is to discuss the following lesson: --- ## [Hexadecimal to Decimal and Binary](https://forum.networklessons.com/t/hexadecimal-to-decimal-and-binary/1221)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 15\ **Last updated:** [August 27, 2026, 7:16am UTC](https://forum.networklessons.com/t/hexadecimal-to-decimal-and-binary/1221 "2026-08-27T07:16:02Z")
This topic is to discuss the following lesson: --- ## [MPLS Layer 3 VPN PE-CE OSPF](https://forum.networklessons.com/t/mpls-layer-3-vpn-pe-ce-ospf/1291)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 80\ **Last updated:** [August 23, 2026, 4:08am UTC](https://forum.networklessons.com/t/mpls-layer-3-vpn-pe-ce-ospf/1291 "2026-08-23T04:08:06Z")
This topic is to discuss the following lesson: [Next page](https://forum.networklessons.com/c/lessons-discussion/8.md?page=1)