My Netwok Dictionary

With the release of Adaptive Security Appliance (ASA) software version 8.4, was finally introduced in the Firewall Cisco ASA 5500 Series Support for the Link Aggregation Control Protocol (LACP). The addition of this feature is to fill a considerable technological gap, which previously did not allow the SAA to interact Advanced Mode with all the series of high-performance switches with the features IEEE 802.3ad.

The protocol LACP belongs to a series of technical-level data link LY2 the ISO / OSI model can aggregate more physical Ethernet ports (up to 8 totals) into a single logical port. This procedure allows for high reliability, High Availability and redundancy individual physical connections and ports. Round robin and hashing techniques, internal to the protocol also allows for statistically redistribute traffic dynamically by running the choice of sending packets on a physical channel parameters on the basis of source IP, destination IP and port. In this way you get the functionality of load balancing simultaneously with the advantage of using different physical links, without introducing dangerous loop, ultimately expanding the total bandwidth, which is rather interesting if present only at 100 Mbps Fast Ethernet connections. Read the rest of this entry »

To set the console password MADRID should access the console interface with the command line console 0:

Router # configure terminal
Router (config) # line console 0
Router (config-line) # login
Router (config-line) # password MADRID Read the rest of this entry »

The current settings of the router are stored in RAM, this type of memory loss when switched off the content router. To prevent this from happening it is necessary to make a copy to the NVRAM. The copy command is used for this purpose, identifying a data source to store and a destination where such data are stored. You can save settings to NVRAM RAM, the RAM to a TFTP server, etc…

MADRID # copy running-config startup-config
Copy RAM to NVRAM

MADRID # copy running-config startup-config
A copy of the NVRAM to RAM Read the rest of this entry »

The process of creating an ACL is done creating the list and then linking them to an incoming or outgoing interface.

Standard ACL Configuration

Router (config) # access-list [1-99] [permit | deny] [source address] [wildcard mask]

Where:

Identifies the range 1-99 and the list.

Permit | deny indicates whether this entry will allow or block traffic from the specified address.

Source address identifies the source IP address.

Joker or wildcard mask identifies the bits of the address field will be checked.

The default mask is 0.0.0.0 (coincidence of all the bits). Read the rest of this entry »

With numbered IP access lists to modify a list would have to first delete numbered access list and put it back again with the necessary corrections. In a numbered access list can not delete individual statements.

IP access lists named individual entries can remove a specific list. Deleting individual entries modify access lists without having to remove and reconfigure from scratch. However it is possible to selectively insert items in a list. If you add an item to the list, this is placed at the end of it.

You can not use the same name for multiple access lists. Access lists of different types can not share name. Read the rest of this entry »

ISDN PRI interface provides leased line T1 or E1. The main tasks of PRI interface settings are:

Use the isdn switch-type command to specify the ISDN switch used by the provider that connects the PRI interface. As with BRI, this command can be entered in global configuration mode or interface configuration.

Router (config) # isdn switch-type primary-Net5

Configuring a T1 or E1 controller is done in four steps: Read the rest of this entry »

The materials used in this lab:-

• 2 Cisco Routers with serial interface
• 2 Cables V35-DTE
• Teleco DCE Modem 2 TD-3 604T
• 2 Cables V35-DTE
• 1 Cable RJ11 (modified for the connection of two modems DCE-3)

Read the rest of this entry »

In this lab Modular QoS CLI is used to ensure minimum bandwidth to the PC according to the criterion IP lowest bigger bandwidth.

Note using the default CBWFQ the sum of bandwidth allocated must not exceed 75% of the total bandwidth of the interface. To change this value using max-reserved-bandwidth [1-100]

access-list 101 permit udp host 192.168.0.101 Any access-list 102 permit udp host 192.168.0.102 Any access-list 103 permit udp host 192.168.0.103 Any class-map match-all pc101 match access-group 101 class-map match- pc_103 to match access-group 103 Class-map match-all pc_102 match access-group 102 policy-map class rules pc101 bandwidth percent 30 percent 20 class class pc_102 bandwidth pc_103 bandwidth percent 10 interface Serial0 ip address 10.0.0.2 255.0.0.0 max- reserved-bandwidth 100 service-policy output rules. Read the rest of this entry »

It is possible to configure and test the connectivity between two or more Cisco Routers in the absence of actual ISDN line via ISDN simulator (easily affordable to the network) as the word itself allows us to simulate two or more ISDN lines directly to our house, enabling us to be sure that our connectivity between nodes is in perfect working (without spending a cent for tests).

Warning: ISDN simulator is not configurable: Use care allocation of ports.

The Tasks are as follows:-

After connecting the console cable RJ45 BRI interface to the simulator, making sure to connect the RJ45 cable into the port caller simulator and vice versa. Now turn on the router and configure, logically, giving it a name and entering user and password for authentication: Read the rest of this entry »

The process for establishing an ISDN connection is initiated when the channel D, which is always active, it sends the number you call the ISDN switch. Traffic on the D channel protocol uses the Link Access Procedure on D channel (LAPD). The LAPD is a link layer protocol of HDLC-based data. The local switch uses the protocols SS7 (Signaling System 7) to set the path to the terminating switch which ended the destination on the D channel.

The channel B mode is then connected end-to-end to send voice or data per channel, or both at once.

The devices must negotiate which protocol to use common data link (PPP, X.25 or Frame-Relay). Read the rest of this entry »