CCIE Lab - IGP Routing

IP Routing Kristof De Brouwer

Agenda ,[object Object],[object Object],[object Object],[object Object]

RIP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RIP V2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RIP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],access-list 100 permit ip host source host route Distribute-list prefix route gateway source  /32 prefix

RIP ,[object Object],[object Object],[object Object],[object Object],Router rip redistribute connected route-map connected->rip metric 1 Route-map connected->rip permit match interface interface

RIP ,[object Object],Router rip default-information orignate route-map Default Route-map Default permit match interface interface

RIP ,[object Object],Router rip offset-list 0 in 1 Serial0/1

RIP interface summaries cause routing loops ,[object Object],[object Object]

RIP interface summaries cause routing loops hostname A1 ! interface Loopback0 ip address 10.0.1.1 255.255.255.255 ! interface FastEthernet0/0 description LAN 0 (A1-A2) ip address 10.2.1.1 255.255.255.0 ! interface Serial1/0 description Link to R1(ROUTER) S1/0 ip address 10.0.7.9 255.255.255.252 ip summary-address rip 10.0.1.0 255.255.255.0 ! router rip version 2 network 0.0.0.0

RIP interface summaries cause routing loops A2#show ip route rip 10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks R 10.0.7.8/30 [120/1] via 10.2.1.1, 00:00:01, FastEthernet0/0 R 10.0.1.1/32 [120/1] via 10.2.1.1, 00:00:01, FastEthernet0/0 R 10.0.1.0/24 [120/3] via 10.0.7.14, 00:00:04, Serial1/0 R 10.0.1.5/32 [120/1] via 10.0.7.14, 00:00:04, Serial1/0 R 10.0.1.4/32 [120/2] via 10.2.1.1, 00:00:01, FastEthernet0/0 [120/2] via 10.0.7.14, 00:00:04, Serial1/0 R 10.0.7.20/30 [120/1] via 10.0.7.14, 00:00:04, Serial1/0 A1#show ip route rip 10.0.0.0/8 is variably subnetted, 11 subnets, 3 masks R 10.0.1.0/24 [120/4] via 10.2.1.2, 00:00:02, FastEthernet0/0 R 10.0.1.2/32 [120/1] via 10.2.1.2, 00:00:02, FastEthernet0/0 R 10.0.1.4/32 [120/1] via 10.0.7.10, 00:00:04, Serial1/0 R 10.0.1.5/32 [120/2] via 10.2.1.2, 00:00:02, FastEthernet0/0 [120/2] via 10.0.7.10, 00:00:04, Serial1/0 R 10.0.7.12/30 [120/1] via 10.2.1.2, 00:00:02, FastEthernet0/0 R 10.0.7.20/30 [120/1] via 10.0.7.10, 00:00:04, Serial1/0

RIP interface summaries cause routing loops A1#trace 10.0.1.18 Type escape sequence to abort. Tracing the route to 10.0.1.18 1 10.2.1.2 4 msec 4 msec 4 msec 2 10.0.7.14 16 msec 4 msec 4 msec 3 10.0.7.22 4 msec 8 msec 8 msec 4 10.0.7.9 16 msec 12 msec 8 msec 5 10.2.1.2 20 msec 12 msec 12 msec 6 10.0.7.14 20 msec 24 msec 20 msec 7 10.0.7.22 28 msec 32 msec 28 msec 8 10.0.7.9 24 msec 24 msec 16 msec 9 10.2.1.2 28 msec 40 msec 20 msec 10 10.0.7.14 28 msec 24 msec 32 msec 11 10.0.7.22 28 msec 32 msec 36 msec 12 10.0.7.9 36 msec 60 msec 32 msec 13 10.2.1.2 40 msec 36 msec 36 msec 14 10.0.7.14 40 msec 40 msec 36 msec

RIP interface summaries cause routing loops A2#show ip route rip 10.0.0.0/8 is variably subnetted, 8 subnets, 3 masks R 10.0.7.8/30 [120/1] via 10.2.1.1, 00:00:05, FastEthernet0/0 R 10.0.1.1/32 [120/1] via 10.2.1.1, 00:00:05, FastEthernet0/0 R 10.0.1.5/32 [120/1] via 10.0.7.14, 00:00:07, Serial1/0 R 10.0.1.4/32 [120/2] via 10.2.1.1, 00:00:05, FastEthernet0/0 [120/2] via 10.0.7.14, 00:00:07, Serial1/0 R 10.0.7.20/30 [120/1] via 10.0.7.14, 00:00:07, Serial1/0

EIGRP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

EIGRP ,[object Object],[object Object],[object Object],[object Object],no ip igmp snooping vlan vlan ! interface interface switchport ip access-group DENY_EIGRP in  only allowed inbound ! ip access-list extended DENY_EIGRP deny eigrp any any permit ip any any ! mac-address-table static 0100.5e00.000a vlan 1363 interface FastEthernet0/1 FastEthernet0/3 FastEthernet0/6

EIGRP ,[object Object],Router eigrp 109 network route wildcard redistribute connected route-map connected->eigrp Route-map connected->eigrp permit 10 match interface interface

EIGRP Stub ,[object Object],[object Object],B A 10.1.1.0/24 router-a#sho ip eigrp topo IP-EIGRP Topology Table .... P 10.1.1.0/24, 1 successors, FD is 281600 via Connected, Ethernet1/2 router-a#show ip eigrp events Event information for AS 100: .... 12 Active net/peers: 10.1.1.0/24 1 14 FC not sat Dmin/met: 4294967295 128256 15 Find FS: 10.1.1.0/24 128256 .... 18 Conn rt down: 10.1.1.0/24 Ethernet 3/1

EIGRP Stub ,[object Object],[object Object],[object Object],[object Object],B A 10.1.1.0/24 router-a#show ip eigrp events Event information for AS 100: 1 NDB delete: 10.1.1.0/24 1 .... 12 Active net/peers: 10.1.1.0/24 1 14 FC not sat Dmin/met: 4294967295 128256 15 Find FS: 10.1.1.0/24 128256 .... 18 Conn rt down: 10.1.1.0/24 Ethernet 3/1

EIGRP Stub ,[object Object],[object Object],B A 10.1.1.0/24 don’t use these paths

EIGRP Stub ,[object Object],B A 10.1.1.0/24 router#config t# router(config)#router eigrp 100 router(config-router)#EIGRP stub connected

EIGRP Stub ,[object Object],[object Object],[object Object],marked as stubs B A 10.1.1.0/24

EIGRP Stub ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],ip route 10.1.4.0 255.255.255.0 10.1.1.10 ! interface serial 0 ip summary-address eigrp 10.1.2.0 255.255.254.0 ! router eigrp 100 redistribute static 1000 1 255 1 1500 network 10.2.2.2 0.0.0.3 network 10.1.2.0 0.0.0.255 eigrp stub connected eigrp stub summary 10.1.2.0/24 A B 10.2.2.2/30

EIGRP Stub ,[object Object],[object Object],[object Object],[object Object],[object Object],ip route 10.1.4.0 255.255.255.0 10.1.1.10 ! interface serial 0 ip summary-address eigrp 10.1.2.0 255.255.254.0 ! router eigrp 100 redistribute static 1000 1 255 1 1500 network 10.2.2.2 0.0.0.1 network 10.1.2.0 0.0.0.255 eigrp stub static eigrp stub receive-only A B 10.2.2.2/30 10.1.2.0/24

EIGRP Stub ,[object Object],[object Object],[object Object],[object Object]

EIGRP Stub ,[object Object],10.1.2.0/24 A B 10.2.2.2/30 router-a#show ip eigrp neighbor detail IP-EIGRP neighbors for process 100 H Address Interface Hold Uptime SRTT RTO Q Seq Type (sec) (ms) Cnt Num 0 10.2.2.3 Et1/2 10 00:00:50 320 1920 0 7 Version 12.2/1.2, Retrans: 0, Retries: 0 Stub Peer Advertising ( CONNECTED ) Routes

EIGRP Stub leak maps R1: router eigrp 10 network 150.1.12.1 0.0.0.0 network 150.1.13.1 0.0.0.0 network 150.1.14.1 0.0.0.0 eigrp stub connected no auto-summary ! R2: router eigrp 10 network 150.1.12.2 0.0.0.0 no auto-summary R3: router eigrp 10 network 150.1.13.3 0.0.0.0 auto-summary R4: router eigrp 10 network 150.1.14.4 0.0.0.0 no auto-summary redistribute rip met 1 1 1 1 1 router rip redistribute eigrp 10 met 1 R2#sh ip route eigrp 150.1.0.0/24 is subnetted, 3 subnets D 150.1.14.0 [90/2195456] via 150.1.12.1, 00:00:23, Serial1/0 D 150.1.13.0 [90/2195456] via 150.1.12.1, 00:00:23, Serial1/0 R3#sh ip route eigrp 150.1.0.0/24 is subnetted, 3 subnets D 150.1.14.0 [90/307200] via 150.1.13.1, 00:01:15, Ethernet0/0 D 150.1.12.0 [90/2195456] via 150.1.13.1, 00:01:15, Ethernet0/0

EIGRP Stub leak maps access-list 1 permit 5.5.0.0 0.0.0.255 access-list 1 permit 5.5.1.0 0.0.0.255 route-map EIGRP_LEAK match ip address 1 router eigrp 10 eigrp stub connected leak-map EIGRP_LEAK R2#sh ip route eigrp 5.0.0.0/24 is subnetted, 2 subnets D EX 5.5.0.0 [170/2560537856] via 150.1.12.1, 00:00:28, Serial1/0 D EX 5.5.1.0 [170/2560537856] via 150.1.12.1, 00:00:28, Serial1/0 150.1.0.0/24 is subnetted, 3 subnets D 150.1.14.0 [90/2195456] via 150.1.12.1, 00:00:28, Serial1/0 D 150.1.13.0 [90/2195456] via 150.1.12.1, 00:00:28, Serial1/0 R3#sh ip route eigrp 5.0.0.0/24 is subnetted, 2 subnets D EX 5.5.0.0 [170/2560051456] via 150.1.13.1, 00:00:20, Ethernet0/0 D EX 5.5.1.0 [170/2560051456] via 150.1.13.1, 00:00:20, Ethernet0/0 150.1.0.0/24 is subnetted, 3 subnets D 150.1.14.0 [90/307200] via 150.1.13.1, 00:00:20, Ethernet0/0 D 150.1.12.0 [90/2195456] via 150.1.13.1, 00:00:20, Ethernet0/0

EIGRP Stub leak maps ,[object Object],[object Object],access-list 1 permit 5.5.0.0 0.0.0.255 access-list 1 permit 5.5.1.0 0.0.0.255 route-map EIGRP_LEAK match ip address 1 match interface e0/0 router eigrp 10 eigrp stub connected leak-map EIGRP_LEAK

EIGRP Metric ,[object Object],[object Object],[object Object],[object Object],[object Object]

OSPF ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OSPF Metric ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OSPF Areas ,[object Object],[object Object],[object Object],[object Object],[object Object]

Classification of OSPF Routers ,[object Object],Backbone Routers Internal Routers Area Border Router Autonomous System Boundary Router

OSPF Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object]

OSPF Hello packets ,[object Object],[object Object],[object Object],[object Object]

OSPF LSA ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OSPF Areas – Totally Stuby Area

OSPF Areas – Not So Stuby Area

OSPF Media Options ,[object Object],[object Object],[object Object]

OSPF Point-to-Point ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OSPF Non-Broadcast Multi-Access ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OSPF Multi-access media ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OSPF MTU Mismatch Issue ,[object Object],[object Object],[object Object],[object Object],[object Object],%OSPF-5-ADJCHG: Process 1, Nbr 150.8.5.5 on Vlan258 from DOWN to DOWN, Neighbor Down: Dead timer expired %OSPF-5-ADJCHG: Process 1, Nbr 150.8.2.2 on Vlan258 from EXSTART to DOWN, Neighbor Down: Too many DBD retransmitions

External default route in NSSA area ,[object Object],[object Object],[object Object],router ospf 1 log-adjacency-changes area 22 nssa default-information-originate metric 100 metric-type 1 network 0.0.0.0 255.255.255.255 area 22 ! ip route 0.0.0.0 0.0.0.0 Serial0/0

External default route in NSSA area ABR-A#show ip ospf database nssa-external | exclude LS|Check OSPF Router with ID (10.0.1.9) (Process ID 1) Type-7 AS External Link States (Area 22) Options: (No TOS-capability, Type 7/5 translation, DC) Link State ID: 0.0.0.0 (External Network Number ) Advertising Router: GW Length: 36 Network Mask: /0 Metric Type: 1 (Comparable directly to link state metric) Metric: 100 Forward Address: 10.0.1.8 External Route Tag: 0 B1#show ip ospf database external | exclude LS|Check OSPF Router with ID (172.16.1.1) (Process ID 1) Type-5 AS External Link States Options: (No TOS-capability, DC) Link State ID: 0.0.0.0 (External Network Number ) Advertising Router: ABR-A Length: 36 Network Mask: /0 Metric Type: 1 (Comparable directly to link state metric) Metric: 100 Forward Address: 10.0.1.8 External Route Tag: 0

OSPF Filtering area area-id range ip-address mask not-advertise Interface interface ip ospf database-filter all out 150.1.0.0/16

OSPF Filtering based on next hop R1#sh ip route 2.2.2.0 Routing entry for 2.2.2.0/24 Known via "ospf 1", distance 110, metric 74, type intra area Last update from 192.168.1.1 on Serial1/0, 00:00:46 ago Routing Descriptor Blocks: 192.168.1.2 , from 192.168.1.2 , 00:00:46 ago, via Serial1/0 Route metric is 74, traffic share count is 1 * 192.168.1.3 , from 192.168.1.3 , 00:00:46 ago, via Serial1/0 Route metric is 74, traffic share count is 1

OSPF Filtering based on next hop router ospf 1 distribute-list route-map ROUTE_FROM_R2 in ! access-list 2 permit 192.168.1.2 ! access-list 12 permit 2.2.2.0 0.0.0.255 ! route-map ROUTE_FROM_R2 deny 10 match ip address 12 match ip next-hop 2 ! route-map ROUTE_FROM_R2 permit 20 R3#sh ip route 2.2.2.0 Routing entry for 2.2.2.0/24 Known via "ospf 1", distance 110, metric 74, type intra area Last update from 192.168.1.1 on Serial1/0, 00:00:46 ago Routing Descriptor Blocks: 192.168.1.3 , from 192.168.1.3 , 00:00:46 ago, via Serial1/0 Route metric is 74, traffic share count is 1

OSPF Type 3 LSA Filtering Router(config)# router ospf 1 log-adjacency-changes area 1 filter-list prefix AREA_1_OUT out area 3 filter-list prefix AREA_3_IN in network 10.0.0.0 0.255.255.255 area 3 network 172.16.1.0 0.0.0.255 area 0 network 192.168.0.0 0.255.255.255 area 1 ! ip prefix-list AREA_1_OUT seq 10 permit 10.25.0.0/8 ge 16 ip prefix-list AREA_1_OUT seq 20 permit 172.20.20.0/24 ! ip prefix-list AREA_3_IN seq 10 permit 172.31.0.0/16

Challenge: Establish OSPF adjacency on a LAN ,[object Object],hostname R1 ! interface FastEthernet 0/0 ip address 192.168.1.17 255.255.255.0 ip ospf 1 area 1 ! router ospf 1 hostname R2 ! interface FastEthernet 0/0 ip address 192.168.1.18 255.255.255.252 ip ospf 1 area 1 ! router ospf 1 hostname R1 ! interface FastEthernet 0/0 ip address 192.168.1.17 255.255.255.0 ip ospf 1 area 1 ip ospf network point-to-point ! router ospf 1 hostname R2 ! interface FastEthernet 0/0 ip address 192.168.1.18 255.255.255.252 ip ospf 1 area 1 ip ospf network point-to-point ! router ospf 1

Challenge: Establish OSPF adjacency on a LAN ,[object Object],[object Object],RFC 2328 The generic input processing of OSPF packets will have checked the validity of the IP header and the OSPF packet header. Next, the values of the Network Mask, HelloInterval, and RouterDeadInterval fields in the received Hello packet must be checked against the values configured for the receiving interface . Any mismatch causes processing to stop and the packet to be dropped. In other words, the above fields are really describing the attached network's configuration. However, there is one exception to the above rule: on point-to-point networks and on virtual links, the Network Mask in the received Hello Packet should be ignored .

Redistribution Fundamentals ,[object Object],[object Object],[object Object],[object Object],EIGRP OSPF Topology Database RIB router#show ip route 10.0.0.0 .... Routing entry for 10.0.0.0/8 Known via “eigrp 100", distance 90, metric 3072256, type internal Redistributing via eigrp 100

Redistribution Considerations ,[object Object],[object Object],[object Object],[object Object],[object Object],172.16 OSPF 172.16 RIP 172.16 OSPF 172.16 RIP Area 300 OSPF RIP 172.16.0.0 ASBR ASBR

Filter to Avoid Redistribution Feedback ,[object Object],EIGRP Process RIP Process Filter 172.16.1.0 Allow 172.16.2.0 Filter 172.16.2.0 Allow 172.16.1.0 172.16.1.0 172.16.2.0

Redistribution Filters ,[object Object],[object Object],[object Object]

Redistribution Filters ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Redistribution Filters ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Redistribution Filters ,[object Object],[object Object],[object Object],[object Object],A EIGRP OSPF B metric 10 metric 2816000 10.1.1.0/24 metric 2560256 metric 2688000 metric 25 metric 2560256

Redistribution Filters ,[object Object],[object Object],access-list 10 permit 10.1.0.0 0.0.255.255 access-list 20 permit 10.2.0.0 0.0.255.255 .... router ospf 100 redistribute eigrp 100 metric 10 distribute-list 10 .... router eigrp 100 redistribute ospf 100 metric 1000 1 255 1 1500 distribute-list 20 .... EIGRP 10.1.0.0/16 OSPF 10.2.0.0/16 A B

Redistribution Filters ,[object Object],[object Object],[object Object],A EIGRP OSPF B metric 10 metric 2816000 10.1.1.0/24 metric 2560256 metric 25

Redistribution Filters ,[object Object],[object Object],route-map ospf->eigrp deny 10 match tag 90 route-map ospf->eigrp permit 20 set tag 110 route-map eigrp->ospf deny 10 match tag 110 route-map eigrp->ospf permit 20 set tag 90 .... router ospf 100 redistribute eigrp 100 metric 10 route-map eigrp->ospf .... router eigrp 100 redistribute ospf 100 metric 1000 1 255 1 1500 route-map ospf->eigrp .... EIGRP 10.1.0.0/16 OSPF 10.2.0.0/16 A B

Redistribution Filters ,[object Object],[object Object],A EIGRP OSPF B metric 10 metric 2816000 10.1.1.0/24 metric 2560256 metric 25

Redistribution Filters ,[object Object],ip route 10.2.0.0 255.255.0.0 serial 0/0 .... router ospf 100 redistribute eigrp 100 metric 10 .... router eigrp 100 redistribute static 100 metric 1000 1 255 1 1500 .... EIGRP 10.1.0.0/16 OSPF 10.2.0.0/16 A B

Route Loops ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Ground Rules ,[object Object],[object Object],[object Object],[object Object]

CCIE Lab - IGP Routing

Recomendados

Recomendados

Mais conteúdo relacionado

Mais procurados

Mais procurados (20)

Destaque

Destaque (16)

Semelhante a CCIE Lab - IGP Routing

Semelhante a CCIE Lab - IGP Routing (20)

CCIE Lab - IGP Routing

Notas do Editor