R1#show version Cisco IOS XE Software, Version 17.18.02 Cisco IOS Software [IOSXE], Virtual XE Software (X86_64_LINUX_IOSD-UNIVERSALK9-M), Version 17.18.2, RELEASE SOFTWARE (fc3) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2025 by Cisco Systems, Inc. Compiled Fri 19-Dec-25 03:49 by mcpre Cisco IOS-XE software, Copyright (c) 2005-2025 by cisco Systems, Inc. All rights reserved. Certain components of Cisco IOS-XE software are licensed under the GNU General Public License ("GPL") Version 2.0. The software code licensed under GPL Version 2.0 is free software that comes with ABSOLUTELY NO WARRANTY. You can redistribute and/or modify such GPL code under the terms of GPL Version 2.0. For more details, see the documentation or "License Notice" file accompanying the IOS-XE software, or the applicable URL provided on the flyer accompanying the IOS-XE software. ROM: IOS-XE ROMMON R1 uptime is 21 minutes Uptime for this control processor is 25 minutes System returned to ROM by reload System image file is "bootflash:packages.conf" Last reload reason: factory-reset This product contains cryptographic features and is subject to United States and local country laws governing import, export, transfer and use. Delivery of Cisco cryptographic products does not imply third-party authority to import, export, distribute or use encryption. Importers, exporters, distributors and users are responsible for compliance with U.S. and local country laws. By using this product you agree to comply with applicable laws and regulations. If you are unable to comply with U.S. and local laws, return this product immediately. A summary of U.S. laws governing Cisco cryptographic products may be found at: http://www.cisco.com/wwl/export/crypto/tool/stqrg.html If you require further assistance please contact us by sending email to export@cisco.com. License Level: License Type: Perpetual Next reload license Level: Addon License Level: Addon License Type: Subscription Next reload addon license Level: The current throughput level is 20000 kbps Smart Licensing Status: Smart Licensing Using Policy cisco C8000V (VXE) processor (revision VXE) with 1651587K/3075K bytes of memory. Processor board ID 95DJKIYLQ83 Router operating mode: Autonomous 4 Gigabit Ethernet interfaces 32768K bytes of non-volatile configuration memory. 3962124K bytes of physical memory. 5234688K bytes of virtual hard disk at bootflash:. Configuration register is 0x2102 R1#show interfaces description Interface Status Protocol Description Gi1 up up to R2 Gi2 up up to R3 Gi3 admin down down Gi4 up up management Lo0 up up R1#show ip route Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, m - OMP n - NAT, Ni - NAT inside, No - NAT outside, Nd - NAT DIA i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route H - NHRP, G - NHRP registered, g - NHRP registration summary o - ODR, P - periodic downloaded static route, l - LISP a - application route + - replicated route, % - next hop override, p - overrides from PfR & - replicated local route overrides by connected Gateway of last resort is not set 1.0.0.0/32 is subnetted, 1 subnets C 1.1.1.1 is directly connected, Loopback0 2.0.0.0/32 is subnetted, 1 subnets O 2.2.2.2 [110/11] via 10.0.12.2, 00:20:19, GigabitEthernet1 3.0.0.0/32 is subnetted, 1 subnets O 3.3.3.3 [110/101] via 10.0.13.3, 00:05:59, GigabitEthernet2 4.0.0.0/32 is subnetted, 1 subnets O 4.4.4.4 [110/21] via 10.0.12.2, 00:20:19, GigabitEthernet1 10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks C 10.0.12.0/24 is directly connected, GigabitEthernet1 L 10.0.12.1/32 is directly connected, GigabitEthernet1 C 10.0.13.0/24 is directly connected, GigabitEthernet2 L 10.0.13.1/32 is directly connected, GigabitEthernet2 O 10.0.24.0/24 [110/20] via 10.0.12.2, 00:20:19, GigabitEthernet1 O 10.0.34.0/24 [110/130] via 10.0.13.3, 00:05:59, GigabitEthernet2 O E2 192.0.2.0/24 [110/20] via 10.0.12.2, 00:02:51, GigabitEthernet1 R1#show ip route ospf Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, m - OMP n - NAT, Ni - NAT inside, No - NAT outside, Nd - NAT DIA i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route H - NHRP, G - NHRP registered, g - NHRP registration summary o - ODR, P - periodic downloaded static route, l - LISP a - application route + - replicated route, % - next hop override, p - overrides from PfR & - replicated local route overrides by connected Gateway of last resort is not set 2.0.0.0/32 is subnetted, 1 subnets O 2.2.2.2 [110/11] via 10.0.12.2, 00:20:19, GigabitEthernet1 3.0.0.0/32 is subnetted, 1 subnets O 3.3.3.3 [110/101] via 10.0.13.3, 00:05:59, GigabitEthernet2 4.0.0.0/32 is subnetted, 1 subnets O 4.4.4.4 [110/21] via 10.0.12.2, 00:20:19, GigabitEthernet1 10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks O 10.0.24.0/24 [110/20] via 10.0.12.2, 00:20:19, GigabitEthernet1 O 10.0.34.0/24 [110/130] via 10.0.13.3, 00:05:59, GigabitEthernet2 O E2 192.0.2.0/24 [110/20] via 10.0.12.2, 00:02:51, GigabitEthernet1 R1#show ip route 192.0.2.0 Routing entry for 192.0.2.0/24 Known via "ospf 1", distance 110, metric 20, type extern 2, forward metric 10 Last update from 10.0.12.2 on GigabitEthernet1, 00:02:51 ago Routing Descriptor Blocks: * 10.0.12.2, from 2.2.2.2, 00:02:51 ago, via GigabitEthernet1 Route metric is 20, traffic share count is 1 R1#show ip cef 192.0.2.0 192.0.2.0/24 nexthop 10.0.12.2 GigabitEthernet1 R1#show ip ospf Routing Process "ospf 1" with ID 1.1.1.1 Start time: 00:04:37.113, Time elapsed: 00:20:44.438 Supports only single TOS(TOS0) routes Supports opaque LSA Supports Link-local Signaling (LLS) Supports area transit capability Supports NSSA (compatible with RFC 3101) Supports Database Exchange Summary List Optimization (RFC 5243) Maximum number of non self-generated LSA allowed 50000 Current number of non self-generated LSA 16 Threshold for warning message 75% Ignore-time 5 minutes, reset-time 10 minutes Ignore-count allowed 5, current ignore-count 0 Event-log enabled, Maximum number of events: 1000, Mode: cyclic It is an area border router Router is not originating router-LSAs with maximum metric Initial SPF schedule delay 50 msecs Minimum hold time between two consecutive SPFs 200 msecs Maximum wait time between two consecutive SPFs 5000 msecs Incremental-SPF disabled Per-prefix-distribution disabled Initial LSA throttle delay 50 msecs Minimum hold time for LSA throttle 200 msecs Maximum wait time for LSA throttle 5000 msecs Minimum LSA arrival 100 msecs LSA group pacing timer 240 secs Interface flood pacing timer 33 msecs Retransmission pacing timer 66 msecs EXCHANGE/LOADING adjacency limit: initial 300, process maximum 300 Number of external LSA 2. Checksum Sum 0x01782E Number of opaque AS LSA 0. Checksum Sum 0x000000 Number of DCbitless external and opaque AS LSA 0 Number of DoNotAge external and opaque AS LSA 0 Number of areas in this router is 2. 2 normal 0 stub 0 nssa Number of areas transit capable is 0 External flood list length 0 IETF NSF helper support enabled Cisco NSF helper support enabled Reference bandwidth unit is 100 mbps Area BACKBONE(0) Number of interfaces in this area is 2 (1 loopback) Area has no authentication SPF algorithm last executed 00:02:51.206 ago SPF algorithm executed 8 times Area ranges are Number of LSA 11. Checksum Sum 0x05A34A Number of opaque link LSA 0. Checksum Sum 0x000000 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0 Area 1 Number of interfaces in this area is 1 Area has no authentication SPF algorithm last executed 00:02:51.206 ago SPF algorithm executed 8 times Area ranges are Number of LSA 15. Checksum Sum 0x0686B2 Number of opaque link LSA 0. Checksum Sum 0x000000 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0 R1#show ip ospf interface brief Interface PID Area IP Address/Mask Cost State Nbrs F/C Lo0 1 0 1.1.1.1/32 1 LOOP 0/0 Gi1 1 0 10.0.12.1/24 10 P2P 1/1 Gi2 1 1 10.0.13.1/24 100 P2P 1/1 R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 2.2.2.2 0 FULL/ - 00:00:37 10.0.12.2 GigabitEthernet1 3.3.3.3 0 FULL/ - 00:00:32 10.0.13.3 GigabitEthernet2 R1#show ip ospf border-routers OSPF Router with ID (1.1.1.1) (Process ID 1) Base Topology (MTID 0) Internal Router Routing Table Codes: i - Intra-area route, I - Inter-area route i 4.4.4.4 [20] via 10.0.12.2, GigabitEthernet1, ABR, Area 0, SPF 8 i 4.4.4.4 [130] via 10.0.13.3, GigabitEthernet2, ABR, Area 1, SPF 8 i 2.2.2.2 [10] via 10.0.12.2, GigabitEthernet1, ASBR, Area 0, SPF 8 i 3.3.3.3 [100] via 10.0.13.3, GigabitEthernet2, ASBR, Area 1, SPF 8 R1#show ip ospf database OSPF Router with ID (1.1.1.1) (Process ID 1) Router Link States (Area 0) Link ID ADV Router Age Seq# Checksum Link count 1.1.1.1 1.1.1.1 1219 0x80000004 0x0005B5 3 2.2.2.2 2.2.2.2 772 0x80000005 0x00AE78 5 4.4.4.4 4.4.4.4 1368 0x80000003 0x0091EA 3 Summary Net Link States (Area 0) Link ID ADV Router Age Seq# Checksum 3.3.3.3 1.1.1.1 359 0x80000002 0x00D4F1 3.3.3.3 4.4.4.4 1366 0x80000001 0x00BD44 10.0.13.0 1.1.1.1 359 0x80000002 0x004379 10.0.13.0 4.4.4.4 1366 0x80000001 0x005980 10.0.34.0 1.1.1.1 359 0x80000002 0x008801 10.0.34.0 4.4.4.4 1375 0x80000001 0x00449E Summary ASB Link States (Area 0) Link ID ADV Router Age Seq# Checksum 3.3.3.3 1.1.1.1 359 0x80000002 0x00BC0A 3.3.3.3 4.4.4.4 766 0x80000001 0x00A55C Router Link States (Area 1) Link ID ADV Router Age Seq# Checksum Link count 1.1.1.1 1.1.1.1 359 0x80000004 0x001BF9 2 3.3.3.3 3.3.3.3 765 0x80000005 0x004270 5 4.4.4.4 4.4.4.4 1366 0x80000002 0x00045A 2 Summary Net Link States (Area 1) Link ID ADV Router Age Seq# Checksum 1.1.1.1 1.1.1.1 1231 0x80000001 0x0047EC 1.1.1.1 4.4.4.4 1221 0x80000001 0x00B55E 2.2.2.2 1.1.1.1 1219 0x80000001 0x007DA8 2.2.2.2 4.4.4.4 1367 0x80000001 0x0023F6 4.4.4.4 1.1.1.1 1219 0x80000001 0x00858E 4.4.4.4 4.4.4.4 1375 0x80000001 0x0062B9 10.0.12.0 1.1.1.1 1231 0x80000001 0x00C850 10.0.12.0 4.4.4.4 1367 0x80000001 0x00D230 10.0.24.0 1.1.1.1 1219 0x80000001 0x00A85A 10.0.24.0 4.4.4.4 1375 0x80000001 0x00E917 Summary ASB Link States (Area 1) Link ID ADV Router Age Seq# Checksum 2.2.2.2 1.1.1.1 771 0x80000001 0x0065C0 2.2.2.2 4.4.4.4 773 0x80000001 0x000B0F Type-5 AS External Link States Link ID ADV Router Age Seq# Checksum Tag 192.0.2.0 2.2.2.2 772 0x80000001 0x00CB0A 0 192.0.2.0 3.3.3.3 765 0x80000001 0x00AD24 0 R1#show ip ospf database external OSPF Router with ID (1.1.1.1) (Process ID 1) Type-5 AS External Link States LS age: 772 Options: (No TOS-capability, DC, Upward) LS Type: AS External Link Link State ID: 192.0.2.0 (External Network Number ) Advertising Router: 2.2.2.2 LS Seq Number: 80000001 Checksum: 0xCB0A Length: 36 Network Mask: /24 Metric Type: 2 (Larger than any link state path) MTID: 0 Metric: 20 Forward Address: 0.0.0.0 External Route Tag: 0 LS age: 766 Options: (No TOS-capability, DC, Upward) LS Type: AS External Link Link State ID: 192.0.2.0 (External Network Number ) Advertising Router: 3.3.3.3 LS Seq Number: 80000001 Checksum: 0xAD24 Length: 36 Network Mask: /24 Metric Type: 2 (Larger than any link state path) MTID: 0 Metric: 20 Forward Address: 0.0.0.0 External Route Tag: 0 R1#show ip ospf database external 192.0.2.0 OSPF Router with ID (1.1.1.1) (Process ID 1) Type-5 AS External Link States LS age: 773 Options: (No TOS-capability, DC, Upward) LS Type: AS External Link Link State ID: 192.0.2.0 (External Network Number ) Advertising Router: 2.2.2.2 LS Seq Number: 80000001 Checksum: 0xCB0A Length: 36 Network Mask: /24 Metric Type: 2 (Larger than any link state path) MTID: 0 Metric: 20 Forward Address: 0.0.0.0 External Route Tag: 0 LS age: 766 Options: (No TOS-capability, DC, Upward) LS Type: AS External Link Link State ID: 192.0.2.0 (External Network Number ) Advertising Router: 3.3.3.3 LS Seq Number: 80000001 Checksum: 0xAD24 Length: 36 Network Mask: /24 Metric Type: 2 (Larger than any link state path) MTID: 0 Metric: 20 Forward Address: 0.0.0.0 External Route Tag: 0 R1#show ip ospf database asbr-summary OSPF Router with ID (1.1.1.1) (Process ID 1) Summary ASB Link States (Area 0) LS age: 360 Options: (No TOS-capability, DC, Upward) LS Type: Summary Links(AS Boundary Router) Link State ID: 3.3.3.3 (AS Boundary Router address) Advertising Router: 1.1.1.1 LS Seq Number: 80000002 Checksum: 0xBC0A Length: 28 Network Mask: /0 MTID: 0 Metric: 100 LS age: 767 Options: (No TOS-capability, DC, Upward) LS Type: Summary Links(AS Boundary Router) Link State ID: 3.3.3.3 (AS Boundary Router address) Advertising Router: 4.4.4.4 LS Seq Number: 80000001 Checksum: 0xA55C Length: 28 Network Mask: /0 MTID: 0 Metric: 30 Summary ASB Link States (Area 1) LS age: 772 Options: (No TOS-capability, DC, Upward) LS Type: Summary Links(AS Boundary Router) Link State ID: 2.2.2.2 (AS Boundary Router address) Advertising Router: 1.1.1.1 LS Seq Number: 80000001 Checksum: 0x65C0 Length: 28 Network Mask: /0 MTID: 0 Metric: 10 Adv Router is not-reachable in topology Base with MTID 0 LS age: 774 Options: (No TOS-capability, DC, Upward) LS Type: Summary Links(AS Boundary Router) Link State ID: 2.2.2.2 (AS Boundary Router address) Advertising Router: 4.4.4.4 LS Seq Number: 80000001 Checksum: 0xB0F Length: 28 Network Mask: /0 MTID: 0 Metric: 10 R1#show running-config | section router ospf router ospf 1 router-id 1.1.1.1