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Remove VLANs from the current list of the trunking line: (config-if)# switchport trunk allowed vlan remove vlan-id • If a VLAN other than VLAN 1 is to be the Native VLAN, it needs to be identified on the trunk ports: (config-if)# switchport trunk native vlan vlan-id

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Interface f0/1 • Switchport mode access • Switchport port-security • Switchport port-security maximum 2 • Switchport port-security mac-address sticky • switchport port-security violation {restrict| protect | shutdown} • Show port-security interface f0/1 • Show port-security address

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A rack unit or U (less commonly RU) is a unit of measure used to describe the height of equipment intended for mounting in a 19-inch rack or a 23-inch rack. One rack unit is 1.75 inches (44.45 mm) high. • The size of a piece of rack-mounted equipment is frequently described as a number in "U". For example, one rack unit is often referred ...

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Bước 10: Đối với mật khẩu cho phép có một khuyết điểm đó là mật khẩu này xuất hiện dưới dạng bản rõ (plain text) trong tệp cấu hình của switch, điều này sẽ rất nguy hiểm nếu ai đó xem được tệp tin cấu hình.  Cần tạo mật khẩu được bảo mật, ví dụ tạo mật khẩu là „ciao‟ (config)#enable secret level 15 ciao Mật khẩu bảo mật là một mật khẩu bổ su...

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The encrypted authentication • Create a plain text password: – Router(config-if)#ip ospf message-digest-key {keyid} md5 {password} • Enable authentication on all interfaces: – Router(config-router)#area {area-number} authentication message-digest • Or • Enable authentication on an interface: – Router(config-if)# ip ospf authentication messa...

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Memory requirements – Typically link state routing protocols use more memory • Processing Requirements – More CPU processing is required of link state routing protocols • Bandwidth Requirements – Initial startup of link state routing protocols can consume lots of bandwidth

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Describe the background and history of EIGRP • Describe the features and operation of EIGRP • Examine the basic EIGRP configuration commands and identity their purposes • Calculate the composite metric used by EIGRP • Describe the concepts and operation of DUAL • Describe the uses of additional configuration commands in EIGRP

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Học viện mạng Bach Khoa - Website: www.bkacad.com 53 • Classful vs. Classless Routing Behavior – It is recommended to use classless routing behavior so supernet and default routes can be used whenever needed – Remember that classful and classless routing behaviors are independent from classful and classless routing protocols. – A router could...

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It is always best to begin with the basics: 1. Make sure all of the links (interfaces) are up and operational. 2. Check the cabling. 3. Check to make sure you have the correct IP address and subnet mask on each interface. 4. Remove any unnecessary configuration commands that are no longer necessary or have been replaced by other commands

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Company XYZ needs to address 400 hosts. • Its ISP gives them two contiguous Class C addresses: – 207.21.54.0/24 – 207.21.55.0/24 • Company XYZ can use a prefix of 207.21.54.0 /23 to supernet these two contiguous networks. (Yielding 510 hosts) • 207.21.54.0 /23 – 207.21.54.0/24 – 207.21.55.0/24

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