CISCO
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[MPLS] OSPF Super Backbone Area (1)Protocols/BGP_OSPF_MPLS_VPN 2021. 6. 23. 13:25
1. OSPF의 VRF는 어떻게 사용하는가 2. SuperBackbone Area의 존재, 어떻게 작동하는지 확인 Service Provider - EIGRP > LDP > MP-BGP(vpnv4), OSPF area 0 with CE Company1 - OSPF area 0 EIGRP와 RIP, BGP는 각 고객별 VRF를 각 해당 라우팅 프로세스 안에서 사용한다. router bgp 1 address-family ipv4 vrf company1 // bgp 1 프로세스 안에서 구별되는 고객별 VRF. redistribute ospf 1 match internal external 1 external 2 exit-address-family 하지만 OSPF는 하나의 Processor가 하나의 고객별 VRF..
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[MPLS] IP/MPLS BasicsProtocols/BGP_OSPF_MPLS_VPN 2021. 6. 8. 16:19
1. OSPF Topology 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 R1#show run | b router ospf 1 router ospf 1 router-id 1.1.1.1 network 1.1.1.1 0.0.0.0 area 0 network 1.1.12.1 0.0.0.0 area 0 network 1.1.14.1 0.0.0.0 area 0 R2#show run | b router ospf 1 router ospf 1 router-id 1.1.2.2 network 1.1.2.2 0.0.0.0 area 0 network 1.1.12.2 0.0.0.0 area 0 network 1.1.23.2 0.0.0.0 ar..
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OSPF Link-state/Adjacency changesProtocols/BGP_OSPF_MPLS_VPN 2021. 2. 16. 16:46
OSPF has a link-state with neighbors. each state from Down to Full is changed with packets establishing a neighbor. if your OSPF neighbor does not come up to FULL state, you can make the troubleshooting closer by looking for the stuck state. 1. Shutdown each interface on R1, R2, R3 R1(config)#int e 0/0.123 R1(config-subif)#sh R2(config)#int e 0/0.123 R2(config-subif)#sh R3(config)#int e 0/0.123 ..
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Building OSPF network with EVE-NG (1)Protocols/BGP_OSPF_MPLS_VPN 2021. 2. 9. 18:26
OSPF(Open Shortest Path First) is a link-state routing protocol. OSPF version 2 is for IPv4 and version 3 is for IPv6. OSPF protocol is illustrated from RFC2328. Why OSPF? It is a standard protocol unlike EIGRP(Cisco). almost all network devices support OSPF for a routing protocol. Why no OSPF? OSPF could consume resources such as CPU and RAM but nowadays devices are high-performance so it is no..