Nov
5
2008
Cisco completes acquisition of Jabber

On September 2008, Cisco has agreed to purchase open-source instant messaging firm Jabber (https://www.ciscozine.com/2008/09/20/cisco-to-acquire-jabber/). Two days ago (November 3, 2008 ) Cisco announced that it has completed its purchase of Jabber Inc. “The acquisition will enable Cisco to embed presence and messaging services “in the network” and provide rich aggregation capabilities to users through both on-premise and on-demand solutions, across multiple platforms including Cisco WebEx® Connect and Cisco® Unified Communications.

Nov
4
2008
Configuring Link Aggregation with EtherChannel
port channel

EtherChannel bundles individual Ethernet links into a single logical link that provides bandwidth up to 1600 Mbps (Fast EtherChannel, full duplex) or 16 Gbps (Gigabit EtherChannel) between two Cisco Catalyst switches. All interfaces in each EtherChannel must be the same speed and duplex, and both ends of the channel must be configured as either a Layer 2 or Layer 3 interface. If a link within the EtherChannel bundle fails, traffic previously carried over the failed link is carried over the remaining links within the EtherChannel. There are two protocols used for the link aggregation: Cisco’s proprietary Port Aggregation Protocol (PAgP). […]

Nov
1
2008
How to optimize HSRP
optimize_hsrp_2

As you see in the article “Implementing High Availability with HSRP“, it is quite simple configure Hot Standby Router Protocol. Some cases require a custom configuration, using priority, track, preempt etc…and these are: The standby preempt interface configuration command allows the router to become the active router when its priority is higher than all other HSRP-configured routers in this Hot Standby group. The configurations of both routers include this command so that each router can be the standby router for the other router. If you do not use the standby preempt command in the configuration for a router, that router […]

Oct
31
2008
Analyze Traffic with Cisco Bandwidth Quality Manager

In the era of electronic exchanges, tiny spikes and bottlenecks in network traffic can create delays which compromise the split-second accuracy needed for effective trading. Tracking down these problems has been beyond the reach of any technology-until now, thanks to Cisco Systems, Inc. While traditional network monitoring systems can only analyze traffic behavior over a minimum of five minutes or so on average, the Cisco Bandwidth Quality Manager (BQM), part of the Cisco Network Application Performance Analysis (NAPA) Solution, can get down to millisecond level.

Oct
29
2008
Implementing High Availability with HSRP

The Hot Standby Router Protocol (HSRP) is a Cisco proprietary first-hop redundancy protocol (FHRP) designed to allow for transparent fail-over of the first-hop IP router, and has been described in detail in RFC 2281. HSRP provides high network availability by providing first-hop routing redundancy for IP hosts on Ethernet, Fiber Distributed Data Interface (FDDI), Bridge-Group Virtual Interface (BVI), LAN Emulation (LANE), or Token Ring networks configured with a default gateway IP address. HSRP is used in a group of routers for selecting an active router and a standby router. In a group of router interfaces, the active router is the […]

Oct
25
2008
Multiple Vulnerabilities in Cisco PIX and Cisco ASA

Multiple vulnerabilities exist in the Cisco ASA 5500 Series Adaptive Security Appliances and Cisco PIX Security Appliances. This security advisory outlines details of these vulnerabilities: Windows NT Domain Authentication Bypass Vulnerability IPv6 Denial of Service Vulnerability Crypto Accelerator Memory Leak Vulnerability

Oct
24
2008
Linksys becomes Cisco Consumer Business Group
Linksys-becomes-Cisco-Consumer-Business-Group

Starting from last October 17, Linksys will now be called Cisco Consumer Business Group (CBG). CBG will become Cisco’s expertise center of consumer activity and go-to-market model and will be aimed towards the development of products and services for consumers and businesses in the SOHO-market. For the next few months, the “Linksys by Cisco” will continue to identify consumer products Cisco and coexist with the Cisco brand, although further changes could be adopted in relation to specific market needs.

Oct
23
2008
Multiple privilege levels
Multiple-privilege-levels

Cisco IOS permits to define multiple privilege levels for different accounts. This could be useful when many people work on the same router / switch, but with different roles (operator, tecnhician, network manager) and there is no time to implement an authentication server. There are 16 different privilege levels that can be used. Level 0 is user mode. Level 15 is the privileged mode. Level 1 through 14 are available for customization and use.

Oct
21
2008
Global Talent Acceleration Program
Global-Talent-Acceleration-Program

Cisco announced the launch of its Global Talent Acceleration Program in Bangalore, India. GTAP is a long-term Cisco initiative aimed at creating Cisco’s next-generation local engineering and sales talent in India and other emerging countries. Through the GTAP in India, Cisco plans to train Indian engineering students at the CCIE level, the highest stage professional certification offered by Cisco. Cisco Learning Solutions Partners, Datacraft, Fast Lane Global Knowledge, and NIIT will act as Cisco’s initial primary partner delivery organizations in India.

Oct
17
2008
The Internet evolution: IPv4 to IPv6
ipv4_vs_ipv6

This visualization represents macroscopic snapshots of the IPv4 and IPv6Internet topologies observed during the first week of January 2008.It simultaneously illustrates the peering richness of each topology and the worldwide distribution of nodes in each routing system.