About Me

ISP & Network guru with 15 years experience in the ISP field.

 

March 2010
M T W T F S S
« Feb    
1234567
891011121314
15161718192021
22232425262728
293031  

Cisco TSHOOT Beta Exam

From http://ciscocert.custhelp.com/app/answers/detail/a_id/5798

The TSHOOT beta is an early release of the TSHOOT certification exam, which is used to determine the predictive ability of the exam questions.  It is the same length and covers the same topics as the final exam.  Candidates who pass a beta exam receive full credit, however scores on beta exams are not immediately available. [...]

Cisco Netflow Video

Configure Netflow From Youtube

Firefox Cisco Docs plugin

https://addons.mozilla.org/en-US/firefox/addon/11390

Allows you to add a search engine to firefox in order to search Cisco docs

Mikrotik BFD

From the Mikrotik WIKI:

Bidirectional Forwarding Detection (BFD) is a protocol intended to detect faults in the bidirectional path between two forwarding engines, including physical interfaces, sub-interfaces, data link(s), and to the extent possible the forwarding engines themselves, with potentially very low latency. It operates independently of media, data protocols, and routing protocols.

BFD is basically a [...]

Cisco Common troubleshooting commands

show version:gives uptime, info about your software and hardware and a few other details.

show ip interface brief

show interface:

show ip interface:

show ip route:

show arp:

show running-config:

show port:

show vlan:

show tech-support:

Cisco Quick tip

Router# show interface serial0

Serial is up line protocol is up, it is the first message that shows us that your serial port is configure properly. It is just possible when you have already given IP address, run no shutdown and configures some other command.

There are some possible errors messages may [...]

Cisco Tip - IPIP Tunnel

Sample Configuration for an IPIP tunnel. The IP addressed have been changed to protect the innocent.

interface Tunnel0
ip address 10.10.10.5 255.255.255.252
no ip directed-broadcast
tunnel source 192.168.253.21
tunnel destination 111.111.2.3
tunnel mode ipip
!
ip route 111.111.2.3 255.255.255.255 Serial0

Cisco 4 Byte AS

Cisco routers which support 4-byte ASN
1800
2801
2811
2821
2851
3825
3845
7200-NPE-G2
12000-GRP
12000-PRP
CAT6000-SUP32/MSFC2A
CAT6000-SUP720/MSFC3
CAT6000-VS-S720-10G/MSFC3
ME6524
ASR 1000

Minimizing Size of BGP routing table

To create an aggregate entry in the BGP routing table:
aggregate-address address mask

To advertise summary addresses only:

aggregate-address address mask as-set

Displaying BGP stats

Display all BGP routes
show ip bgp cidr-only

Display routes with inconsistent originating ASes
show ip bgp inconsistent-as

Display all BGP paths
show ip bgp paths

Display stats of all BGP connections:
show ip bgp summary