VNetLab

Category: Network Administration

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Network Administration

OSPF Theory

#ospf #ospf #ospf #ospf #details #theory #ospf LSA #ospf  #packet type #ospf states #ospf states All of the following fields in an OSPF hello message must match for an adjacency to form: -hello timer...

NAT 0

Network Administration

NAT

The router maintains a NAT forwarding table which is empty in the beginning. When a client connected to the router wants to send out a packet, the router would receive it and modify the...

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Network Administration

default-information originate vs default-originate

default-information originate vs default-originate router bgp default-information originate [if default route present in routing table then its can be redistribute default route to downstream] rotuer bgp neighbor x.x.x.x default-originate [no need default route in...

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Cisco / Network Administration

Cisco Auto Backup to FTP

conf t ip ftp username noc ip ftp password P@SSword ntp server x.x.x.x kron policy-list FTP_config_Backup cli show run | redirect ftp://noc:P@SSword@x.x.x.x/Backup_C-D-SW202.cfg ! kron occurrence FTP_config_Backup in 7:1:1 recurring pollicy-list FTP_Config_Backup

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Juniper / Network Administration

Juniper Configuration Rollback

Juniper rollback configuration number—(Optional) Configuration to return to. The range of values is from 0 through 49. The most recently saved configuration is number 0, and the oldest saved configuration is number 49. The...

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Cisco / Network Administration

Cisco IOS upgrade

2900>enable 2600#copy tftp: flash:/flash0:/flash1: Address or name of remote host []? 10.10.10.1 Source filename []? c7200-adventerprisek9-mz.124-22.T Destination filename[c7200-adventerprisek9-mz.124-22.T]? c7200-adventerprisek9-mz.124-22.T file will upload and after finish upload enter below command 2900(config)#boot system flash:c2600-adventerprisek9-mz.124-12.bin

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Cisco / Network Administration

OSPF Authentication

IOS router ospf 1 area 0 authentication ! interface X ip ospf authentication ip ospf authentication-key xxx ———————————————————————————– IOS router ospf 1 area 0 authentication message-digest ! interface X ip ospf authentication message-digest ip...

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Cisco / Network Administration

OSPF v3

IOS ipv6 router ospf 1 router-id 2.2.0.2 ! interface Ethernet1/0 ipv6 ospf 1 area 0 IOS-XR router ospfv3 1 router-id 2.2.0.8 address-family ipv6 unicast area 0 interface Loopback0 passive ! interface GigabitEthernet0/2/1/1

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Cisco / Network Administration

OSPF Rout Summary

 Type-3 summary o at ABR o area x range 10.10.10.0 255.255.255.0 (IOS) o area 1 range 10.10.10.0/24 (IOS-XR)  Type-5 summary o at ASBR o summary-address 20.20.20.0 255.255.255.0 (IOS) o summary-prefix 20.20.20.0/24 (IOS-XR)