How to Configure GRE Tunnel in Cisco

GRE means Generic Routing Encapsulation. GRE is a Cisco proprietary standard for encapsulating layer 3 packets over an IP network.GRE tunnel Create  a Virtual Point to Point Connection. GRE Protocol offer many Advantage like-use Multiple Protocol in single Backbone,Being less resource demanding than its alternatives (e.g. IPsec VPN) Please note that GRE does not encrypt the tunnel but encapsulates it with a GRE header. if data protection require need to configure IPSEC. in this Topology we Configure GRE Tunnel.   R1 Router Initial Configure R1#conf t Enter configuration commands, one…

Read More

How To Configure IPSEC in CISCO

  IPSEC means internet protocol security. ipsec provide  security services for IP packets such as encrypting sensitive data, authentication, protection against replay and data confidentiality. in this topology we configure IPSEC in CISCO Router R1 Router Initial Configure R1#conf t Enter configuration commands, one per line. End with CNTL/Z. R1(config)#int e0/0 R1(config-if)#no sh R1(config-if)#ip ad R1(config-if)#ip add R1(config-if)#ip address *Apr 1 19:58:10.187: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up *Apr 1 19:58:11.187: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, changed state to up R1(config-if)#ip address 172.16.1.2 255.255.255.0 R1(config-if)#int e0/1 R1(config-if)#no sh R1(config-if)#ip…

Read More

How to Configure HSRP in Cisco Router

  HSRP means Hot Standby Routing Protocol. its Cisco proprietary protocol. HSRP  is simple concept that works by having one router in HSRP group selected primary and other is active router. HSRP using 1985 udp protocol. HSRP send hello mesage to multicast address 224.0.0.2. HSRP also known as FHRP(First Hop Redundancy Protocols). HSRP sends hellos every 3 seconds and has a dead timer of 10 seconds. R1#conf t Enter configuration commands, one per line. End with CNTL/Z. R1(config)#int R1(config)#interface e0/1 R1(config-if)#no sh R1(config-if)# *Mar 31 21:50:43.775: %LINK-3-UPDOWN: Interface Ethernet0/1, changed state to up…

Read More

How to configure IPSEC between Mikrotik and Cisco

  IPSEC means internet protocol security. ipsec provide  security services for IP packets such as encrypting sensitive data, authentication, protection against replay and data confidentiality. in this topology we configure IPSEC between Mikrotik and Cisco. Mikrotik Configure Mikrotik Initial Configuration done. now we configure ipsec. for ipsec configure we need to allow below port and protocol. – Port 500/UDP – Port 4500/UDP – Proto 50 – Proto 51 [atik@xyz]  ip firewall filter add chain=input proto=ipsec-ah action=accept place-before=0 [atik@xyz]  ip firewall filter add chain=input proto=ipsec-esp action=accept place-before=0 [atik@xyz]  ip firewall filter add…

Read More

How to configure spanning tree in Cisco switch

  Spanning-Tree Protocol (STP) prevents loops from being formed when switches or bridges are interconnected via multiple paths. Spanning-Tree Protocol implements the 802.1D IEEE algorithm by exchanging BPDU messages with other switches to detect loops, and then removes the loop by shutting down selected bridge interfaces. This algorithm guarantees that there is one and only one active path between two network devices. Task 1   Configure Switch1 as the VTP Server and the other Switch (SW2) as VTP Client. Configure SW1 to be the STP root for VLAN 1. Change…

Read More

How To Configure Inter-Vlan Routing in Cisco Router

Configure Inter-Vlan Routing in Cisco Router vlan divide broadcast domain. when need one vlan communicate to other vlan that time traffic must be routed between them. this called inter-vlan routing. Step 1 Configure sub interface in Router. IOU1#conf t Enter configuration commands, one per line.  End with CNTL/Z. IOU1(config)#int e0/0 IOU1(config-if)#int e0/0.10 IOU1(config-subif)#en IOU1(config-subif)#encapsulation do IOU1(config-subif)#encapsulation dot1Q 10 IOU1(config-subif)#ip add IOU1(config-subif)#ip address 192.168.10.1 255.255.255.0 IOU1(config-subif)#no sh IOU1(config-subif)#int e0/0.20 IOU1(config-subif)#encapsulation dot1Q 20 IOU1(config-subif)#ip address 192.168.20.1 255.255.255.0 IOU1(config-subif)#no sh IOU1(config-subif)#hostna IOU1(config-subif)#hostname R1 Step 2 Configure trunk in Switch for allow vlan IOU1#conf…

Read More

How To Configure Vlan in Cisco Switch

Vlan means virtual local area network. its use logically separate workstation. in this topology we use two vlan for sales and MKT. Step 1 Create Vlan in Cisco Switch IOU1(config)#vlan 10 IOU1(config-vlan)#name sales IOU1(config)#vlan 20 IOU1(config-vlan)#name MKT Verify Vlan IOU1#show vlan brief VLAN Name Status Ports —- ——————————– ——— ——————————- 1 default active Et0/0, Et0/1, Et0/2, Et0/3 Et1/0, Et1/1, Et1/2, Et1/3 Et2/0, Et2/1, Et2/2, Et2/3 Et3/0, Et3/1, Et3/2, Et3/3 10 sales active 20 MKT active Then Assign Vlan in specific port IOU1#conf t Enter configuration commands, one per line. End…

Read More

How to configure GLBP For layer 3 redundancy

How to configure GLBP For layer 3 redundancy GLBP means Gateway Load Balancing Protocol. its CISCO proprietary protocol try to overcome the restriction of existing redundant router protocols adding basic load balancing service GLBP use Load balancing in round robin method. GLBP appoint one Active Virtual Gateway(AVG) for every group. another group members doing as backup in case of AVG failure. In case there are more than two members, the second best AVG is fixed in the Standby state and all other members are fixed in the Listening state. This is check using…

Read More

How to Backup IOS File From Cisco Router

  Before Starting procedure you need to download and install a TFTP server on your PC There are many Free TFTP server just download one and install your PC. Step 1 Create a consol connection with the default setting Step2 You need to know the iso file name to see that run following command here you can fine like System image file is “flash:c1700-sy7-mz.123-15.bin”             [This is your router IOS] Router#show version Step3 Then Run following command. Router#copy flash tftp Source filename []? c1700-sy7-mz.123-15.bin Address or name of remote host []?…

Read More

HOW TO ABR AND ASBR CONFIGURATION

  Interface IP Address Configuration      R1     Interface    IP Address  Subnet Mask S0/2/0       1.1.1.1           255.0.0.0   E0             10.1.1.1         255.0.0.0   R2     Interface    IP Address  Subnet Mask S0              1.1.1.2          255.0.0.0 S1              2.2.2.1          255.0.0.0 E0              20.1.1.1        255.0.0.0  …

Read More