About Author

Cisco Switch VLAN Security

by ShahedFebruary 2, 2011October 30, 20150

Cisco Switch VLAN Security Today I will discuss about Cisco Switch VLAN Security issue. A Virtual Local Area Network (VLAN) is a broadcast domain. All members of a VLAN receive every broadcast packet sent by members of the same VLAN, but they do not receive packets sent by members of a different VLAN. All members of a VLAN are grouped logically into the same broadcast domain independent of their physical location. Adding, moving or changing members is achieved via software within a switch. Routing is required for communication among members of different VLANs.[boxads] The next subsections describe the vulnerabilities and …

by ShahedFebruary 1, 2011October 30, 20150

Cisco Switch System Availability Today I will discuss about Cisco Switch System Availability issue. Many attacks exist and more are being created that cause denial of service (DoS), either partially or completely, to systems or networks. Switches are just as susceptible to these attacks. These attacks focus on making resources (e.g., system processor, bandwidth) unavailable. [boxads] The following counter measures will mitigate the vulnerabilities to system availability on each switch: To prevent fast flooding attacks and to guarantee that even the lowest priority processes get some processor time use the scheduler interval command. The following Cisco Switch System Availability example …

by ShahedJanuary 30, 2011October 26, 20150

How to configure Eth-Trunk on Huawei Switch port/interface: Today i will show you how to configure Eth-Trunk on Huawei Switch port/interface. Here i use one side GigabitEthernet 0/0/15 & 0/0/16 interface & other side GigabitEthernet 0/0/2 & 0/0/3, And Eth-Trunk 10. [boxads] Step-1: At first login your switch & go to system-view mode & follow bellow configuration. <HUAWEI> system-view [HUAWEI]interface Eth-Trunk 10 [HUAWEI-Eth-Trunk10]port link-type trunk [HUAWEI-Eth-Trunk10]port trunk allow-pass vlan xxx xxx xxx xx [HUAWEI-Eth-Trunk10]quit [HUAWEI] [Here xxx is your desired VLAN] Step-2: Now go to interface mode & add eth-trunk 10, And follow bellow configuration.

by ShahedJanuary 25, 2011October 30, 20150

HSRP Tuning Example Today I will discuss about HSRP Tuning. As you see in the article “HSRP (Hot Standby Router Protocol)”, it is quite simple configure Hot Standby Router Protocol. [boxads] 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 …

by ShahedJanuary 25, 2011October 30, 20150

HSRP (Hot Standby Router Protocol) The HSRP (Hot Standby Router Protocol) 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. [boxads] 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 …

by ShahedJanuary 25, 2011October 24, 20150

Configure Port Channel CISCO Switch: 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. [boxads] If one link within the EtherChannel bundle fails, traffic previously carried over the failed link is carried over the remaining links within the EtherChannel. Link Aggregation protocols are: IEEE standard Link Aggregation Protocol …