ICND2: Licensing

Questions are appearing in the exam about licensing.

The most obvious question is about license types: See table below.

The most useful commands:

show license
license install flash0:uck9etc
license boot module c2900 technology-package uck9 (evaluation license)

What are the ISO v15 Feature sets (technology package) types we have now days with ISR G2:

1. IP Base (ipbaseK9)come and running with any new ISR G2 routers (1900,2900,3900 Series) , its entry level for Cisco IOS functionality
2. DATA (dataK9)support MPLS.ATM. Multiprotocol support
3. Unified Communcations (ucK9) support VOIP & IP Telephony
4. Security (securityK9) support Cisco IOS Firewall , IPS , IPsec , 3DES, VPN

(Source:  https://learningnetwork.cisco.com/docs/DOC-20321)

ICND2: Netflow notes

Netflow is used to collect data from a router (on a per interface basis) for the following purposes:

1. Who is using network services and for what
2. Accounting and charge for network use
3. Info for network planning
4. Adjust network according to use.

Netflow analysers can

1. Major users, top talkers, top protocols, etc
2. Websites visited
3. Users of excessive bandwidth
4. Bandwidth used per application

Cisco flow definition

Unidirectional sequence of packets sharing:

1. Source IP address
2. Destination IP address
3. Source port for UDP or TCP, 0 for other
protocols
4. Destination port for UDP or TCP, type and
code for ICMP, or 0 for other protocols
5. IP protocol
6. Ingress interface (SNMP ifIndex)
7. IP Type of Service

Configure Netflow

• Enable CEF (done by default)
– ip cef
• Enable flow on each interface
ip route cache flow
OR
ip flow ingress
ip flow egress
• View flows
– show ip cache flow
– show ip flow top-talkers

Exporting flow

ip flow-export version 9
ip flow-export destination 192.168.1.1 9996  (9996 is the port)

Verify:

sh ip flow interface
sh ip flow export
sh ip cache flow

ICND2: WAN technologies notes

Circuit Switching, Packet Switching and PPP

 

Circuit switching	Circuit-switched networks create dedicated point-to-point connections.	Advantage: less latency for voip, cheap cost (Remember: Circuit Switching Cheap) Disadvantage: low speed
Packet switching	Packet-switched networks move data in separate, small blocks — packets — based on the destination address in each packet	Advantage: speed Disadvantage: More complex
point to point	Supports pap and chap authentication, multi platform	Advantage:  Quality Disadvantage:  Limited flexibility