[2011-12-06] New animation tutorials: FTP, WWW. Audio enabled.
[2011-10-21] OSPF Concetps: Architecture, why, flow. (15 animations)
[2011-09-08] Routing animations for beginners (audio)
[2011-07-21] Multilayer switching animation released (CCNP)
[2011-07-05] CCNP Switching Security
[2011-05-17]
[2011-04-28]
[2011-04-09]
[2011-03-24]
- [2011-12-06] New animation tutorials: FTP, WWW. Audio enabled.
11 FTP animation tutorials answer following questions:
- What are control and data connection?
- How do FTP commands, connections, and return codes interact?
- How does FTP react to link down and up?
- Can FTP server brings up a connection across a gateway with NAT?
4 WWW animation tutorials to answer following questions:- What's the structure of url? Ho to use it ?
- How can HTTP fetch web pages?
- How to use HTML to build web pages?
- [2011-10-21] OSPF Concetps: Architecture, why, flow. (15 animations)
Beginners may find traditional OSPF materials are either too broad or too detailed. This OSPF concept series is focused:on helping beginners grasp key system concepts quickly. It answers the following questions:
- How is OSPF superior to RIP?
- Why do we need 7 LSAs?What do they do?
- How does OSPF treat interior routers?
- How does SPF use Router LSA to calculate shortest path?
See more at OSPF Concept overview. All animations are audio empowered. Click the Audio button at upper left.
- [2011-09-08] Routing animations for beginners (audio)
In our first questionnaire sent in August, we received good feedback from many beginners. They ask:- Do I need to know something about networking in order to read your animations?
- Can you provide animations for real beginners? I never saw a router.
We've been working on it and just published 9 animations to answer the following questions:
- How does Internet forward messages?
- How does internet use router to forward message?
- What is routing path?
- How to route with IP address?
- How to route with network address?
- What is network address and how is it related to IP address?
- What is static route?
- How does default route works?
- What do we need default route?
Note: To listen audio, click Voice tab at the upper left corner (above thumbnails)
- [2011-07-21] Multilayer switching animation released (CCNP)
- VLAN routing- One arm router. How to route packets across VLAN without multilayer switches?
- Multilayer switchng basics Visualize "Route Once, Switch Many" with a router engine blade inserted in a switch.
- CEF - Cisco Express Forwarding Visualizie how CEF uses FIB and Adjacency to switch packets at line rate.
- Layer-3 switching (Dynamips lab) Visualize simulation result of a Layer 3 switching scenario: CAM, routing table, ARP cache, SVI, virtual MAC.
- [2011-07-05] CCNP Switching Security
CCNP Switching Security: Just released 12 animaations.
- Port secuirty:
- DHCP DOS Attack
- DHCP Snooping
- ARP Inspection
- IP Source Guard
5.1 IP Spoofing
5.2 IP Source Guard- IP Spoofing
5.3 Man In The Middle
5.4 IP SOurce Guard- Man In The Middle
5.5 IP Source Guard- Static IP6. Private VLAN
7. VLAN ACL
8. VLAN Hopping - [2011-05-17]
New Release: CCNP Path Control. 7 animations [2011.5.17]
- Redistribute route How to use "Redistribute" to advertise subnets to a different routing domain.
- Distribute list filtering Redistribute may produce bad routes that need to be filtered. One way is to use distribure list.
- Route map filterring The other way to filter redistributed routes is route map.
- Prefix-list filtering Use prefix-list to filter a block of consective addresses.
- Administrative distance If redistribute produces suboptimal routes, use AD to fix it.
- Policy-basred routing (PBR) If two nodes are connected by parallel links with differnt speed, only one link is selected. The other is idle. Use PBR to fix it.
- IP SLA - floating static route Use IP SLA and floating static route to switch to backup route automatically when the main path fails.
- [2011-04-28]
Just published 8 CCNA RIP animations [2011.4.28]
- RIP configuration Configure RIP. Compare routing table with topology.
- Passive interface Configure router interfaces to disable RIP packet transmission.
- Subnet mask in RIPv1 RIPv1 does not know subnet mask. But if an interface's mask is changed, routes in routng table can also change.
- RIPv2 configuration See how to configure RIP to advertise classless subnets
- RIPv2 manual summary Configure RIP route summary.
- Triggered update Show how to flood routes when topology changes
- Float static route Configure a statuc route as a backup route.
- IP defauly network Advertise external routes as a default route to other RIP routers.
- [2011-04-09]
CCNA OSPF tutorial animation (11) just released. [2011.4.9]
Use animation to illustate the cause-effect relationships of topology, configuration commands, and show output. Once the beginners get the key point in a few minutes, taking classes or reading CCNA books become much easier.- OSPF basic configuration. How to configure OSPF (router ID, network address, area) and verify (route, LSA.)
- Broadcasr DR. Configuration routers (priority, Router ID) and verify election results (DR, BDR, DROTHER).
- Simple authetication .
- MD5 authentication
- Defaul-info originate Configure an ASBR as a the default gateway for OSPF routers (use a default route 0.0.0.0.)
- Area Border Router Configure ABR routers and verify results (route, LSA type).
- Manual summary Configure ASBR (range, summary-address) to summarize external addresses..
- Stub area Configure a stub area and observe its effects on interior routers (default route 0.0.0.0)
- NSSA Configure a NSSA when a router in a stub atea has external addresses to share.
- Virtual link - broken area 0 Use virtual link to join physically separated Area 0s.
- Virtual link - remote area Use virtual link to connect a remote area to Area 0.
- [2011-03-24]
HSRP labs are updateed: Animate dynamips simulation lab with color packets and state tables. [2011.3.22]
- 2. RFC2281 state table. Animate HSRP's RFC state table to show how to look uo state changes.
- 3. Election lab. Animation a dynamips-based lab to show detail steps of HSRP election (packets, states)
- 4. Link down lab. Animate a dynamips-based lab to show how HSRP recovers from link dow (Timer, state, action)
- 5. HSRP-OSPFink down-1. Routers are running HSRP and OSPF (dynamips). Link down triggers protocol transition. 3 ping are lost. One loss is due to HSRP convergence timing. 20 critical packets are colored (out of 300) to show the ripple effect of link down..
- 6. HSRP-OSPF link down-2. Repeat the previius lab. But one ping loss is caused by OSPF synchronization timing.

