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Networking Blogs

meddane
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Background: The purpose of this article is to shown how the Largest area id is OSPF is used as a tie breaker to select the best route. The goal In this topologie is to ensure so that R1 will prefer the path through R3 for 4.4.4.0/24 and 4::/64 without mod... Read More
meddane
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Background: By definition with OSPFv2 the content of the LSA Type 2 describes the network segment listing the DR address, the attached routers, and the used subnet mask. This information is used by each router participating in OSPF to build the exact pict... Read More
meddane
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Why an NSSA ABR does not inject a default route automatically into NSSA unlike with stub area ? In this topology if an ASBR inject a default route into OSPF in order to permit internal ospf routers to reach another routing domain, it creates a Type-7 LSA ... Read More
jdoyl28
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Hello Everyone! I posted the below information on Reddit yesterday, but want to ensure it is spread through the community. Apologies if this is the incorrect approach/forum. I also posted this in the Learning Network. First, a disclosure. I'm not a cloud/... Read More
meddane
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Like with DR (Designated Router) on OSPF, on broadcast multi-access, IS-IS elects a designated intermediate system (DIS) but keep in mind that unlike with OSPF where a Backup Designated Router is elected , on IS-IS there is no concept of a Backup DIS.Then... Read More
meddane
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Basic configuration of all routers: R1: ipv uni ! interface Loopback0 ip address 1.1.1.1 255.255.255.0 ipv6 enable ospfv3 network point-to-point ospfv3 1 ipv4 area 0 ! interface FastEthernet0/0 ip address 12.0.0.1 255.255.255.0 ipv6 enable ospfv3 1 ipv4 a... Read More
meddane
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Basic configuration of R1 and R2: R1(config)#int fa0/0 R1(config-if)#ip add 10.0.12.1 255.255.255.252 R1(config-if)#ipv enable R1(config-if)#no shutdown R1(config-if)#ospfv3 1 ipv4 area 0 R1(config)#router ospfv3 1 R1(config-router)#address-family ipv4 un... Read More
meddane
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Basic configuration of all routers: R1: ipv uni ! interface FastEthernet0/0 ip address 123.0.0.1 255.255.255.0 ipv6 enable ospfv3 1 ipv4 area 0 no shut ! router ospfv3 1 ! address-family ipv4 unicast router-id 1.1.1.1 exit-address-family R2: ipv uni ! int... Read More
meddane
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Basic configuration of all routers: R1: ipv uni ! interface Loopback0 ipv6 address 1::1/64 ! interface FastEthernet0/0 ipv6 address 12::1/64 ipv6 ospf 1 area 0 ! interface FastEthernet0/1 ipv6 address 13::1/64 ipv6 ospf 1 area 0 ! ipv6 router ospf 1 route... Read More
meddane
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Basic configuration of all routers: R1: interface FastEthernet0/0 ip address 172.16.1.1 255.255.255.0 ip ospf 1 area 0 no shut ! interface FastEthernet0/1 ip address 10.1.13.1 255.255.255.0 ip ospf 1 area 0 no shut ! ip route 192.168.1.0 255.255.255.0 ! r... Read More
meddane
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Basic configuration of all routers: R1: ipv6 unicast-routing ! interface FastEthernet0/0 ipv6 address 2012:12::1/64 ipv6 enable ospfv3 1 ipv6 area 0 no shut ! router ospfv3 1 ! address-family ipv6 unicast router-id 2.2.2.2 exit-address-family R2: ipv6 uni... Read More
Amilee San Juan
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Listen: https://smarturl.it/CCRS8E35 Follow us: twitter.com/ciscochampion From seamless Wi-Fi onboarding to differentiated loyalty experiences, Cisco DNA Spaces offers a range of solutions to tackle Wi-Fi onboarding challenges and provide modernized custo... Read More
Amilee San Juan
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Listen: https://smarturl.it/CCRS8E34 Follow us: twitter.com/ciscochampionNearly every day we can read about “ransomware” holding another organization’s data hostage, shutting their operations down, or disrupting their supply chain. Commercial enterprises,... Read More
meddane
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Basic configuration of all routers: R1: ipv un ! int lo0 ip add 1.1.1.1 255.255.255.0 ipv add 1::1/64 ipv6 enable ospfv3 1 ipv6 area 0 ospfv3 1 ipv4 area 0 ospfv3 network point-to-point ! interface G0/0 ip address 12.0.0.1 255.255.255.0 ipv6 address 12::1... Read More
meddane
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Basic configuration: R1: ipv uni ! interface FastEthernet0/0 ipv6 address 2012:12::1/64 ipv6 ospf 1 area 0 no shut ! interface FastEthernet1/0 ipv6 address 2013:13::1/64 ipv6 ospf 1 area 0 no shut ! ipv6 router ospf 1 router-id 1.1.1.1 R2: ipv uni ! inter... Read More