RP/0/RP0/CPU0:R3#show version Thu Sep 10 14:16:06.104 UTC Cisco IOS XR Software, Version 26.1.1 LNT Copyright (c) 2013-2026 by Cisco Systems, Inc. Build Information: Built By : cisco Built On : Thu Feb 26 03:41:18 UTC 2026 Build Host : iox-lnx-054 Workspace : /auto/srcarchive12/prod/26.1.1/xrd-control-plane/ws/ Version : 26.1.1 Label : 26.1.1 cisco XRd Control Plane cisco XRd-CP-C-01 processor with 248GB of memory R3 uptime is 44 minutes XRd Control Plane Container RP/0/RP0/CPU0:R3#show interface description Thu Sep 10 14:16:06.259 UTC Interface Status Protocol Description -------------------------------------------------------------------------------- Lo0 up up Nu0 up up Mg0/RP0/CPU0/0 up up management Gi0/0/0/0 up up to LAN (10.1.0.0/24) Gi0/0/0/1 up up to R4 (10.3.4.0/24 p2p) Gi0/0/0/2 admin-down admin-down RP/0/RP0/CPU0:R3#show route Thu Sep 10 14:16:06.476 UTC Codes: C - connected, S - static, R - RIP, B - BGP, (>) - Diversion path 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, E - EGP i - ISIS, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, su - IS-IS summary null, * - candidate default U - per-user static route, o - ODR, L - local, G - DAGR, l - LISP A - access/subscriber, a - Application route M - mobile route, r - RPL, t - Traffic Engineering, (!) - FRR Backup path s - local SRv6 route, z - local IID route Gateway of last resort is not set i L2 1.1.1.1/32 [115/10] via 10.1.0.1, 00:13:10, GigabitEthernet0/0/0/0 i L2 2.2.2.2/32 [115/10] via 10.1.0.2, 00:13:10, GigabitEthernet0/0/0/0 L 3.3.3.3/32 is directly connected, 00:42:34, Loopback0 i L2 4.4.4.4/32 [115/10] via 10.3.4.4, 00:12:59, GigabitEthernet0/0/0/1 C 10.1.0.0/24 is directly connected, 00:42:30, GigabitEthernet0/0/0/0 L 10.1.0.3/32 is directly connected, 00:42:30, GigabitEthernet0/0/0/0 i L2 10.2.4.0/24 [115/20] via 10.1.0.2, 00:08:54, GigabitEthernet0/0/0/0 [115/20] via 10.3.4.4, 00:08:54, GigabitEthernet0/0/0/1 C 10.3.4.0/24 is directly connected, 00:42:30, GigabitEthernet0/0/0/1 L 10.3.4.3/32 is directly connected, 00:42:30, GigabitEthernet0/0/0/1 RP/0/RP0/CPU0:R3#show route isis Thu Sep 10 14:16:06.613 UTC i L2 1.1.1.1/32 [115/10] via 10.1.0.1, 00:13:10, GigabitEthernet0/0/0/0 i L2 2.2.2.2/32 [115/10] via 10.1.0.2, 00:13:10, GigabitEthernet0/0/0/0 i L2 4.4.4.4/32 [115/10] via 10.3.4.4, 00:12:59, GigabitEthernet0/0/0/1 i L2 10.2.4.0/24 [115/20] via 10.1.0.2, 00:08:55, GigabitEthernet0/0/0/0 [115/20] via 10.3.4.4, 00:08:55, GigabitEthernet0/0/0/1 RP/0/RP0/CPU0:R3#show isis Thu Sep 10 14:16:06.880 UTC IS-IS Router: 1 System Id: 0030.0300.3003 Hostname: R3 IS Levels: level-2-only Manual area address(es): 49.0001 Routing for area address(es): 49.0001 Multi-Instance Id: 0 Running on: RP/0/RP0/CPU0 Job Id: 1003 PID: 4382 Respawn count: 1 Started: Thu 2026 Sep 10 13:33:23.312 UTC Null0 ready: Thu 2026 Sep 10 13:33:24.711 UTC Protocol shutdown: No System memory state: Normal Last change: never Memory state: Normal Last change: never Last/Initial memory usage/limit: 1595343/2147483648 0% Memory state monitoring interval: 60 s Memory usage/limit: 13859361/2147483648 0% Memory usage specifics (count/bytes): Nodes: 5/2040 LSPs: 5/2090 Links: 10/12240 Prefixes: 11/10120 Nets: 7/4432 Paths: 16/1536 LSP MTU: 1492 LSP Full: level-1: No, level-2: No LSP fast flooding: Disabled Max LSP Tx: 1000 PSNP Delay: 500 ms PSNP interval: 50 ms Non-stop forwarding: Disabled Most recent startup mode: Cold Restart MFI LSD registered: No MFI LSD last registered: never TE connection status: Down TE connection up: never TE connection flaps: 0 XTC connection status: Down XTC connection up: never XTC connection flaps: 0 BFD connection status: Up BFD connection up: Thu 2026 Sep 10 13:33:25.508 UTC BFD connection flaps: 0 BFD HA role change: never BFD client HA role: none BFD server HA role: none Overload Bit: not configured Maximum Metric: not configured Topologies supported by IS-IS: IPv4 Unicast Rib connected Level-2 Metric style (generate/accept): Wide/Wide Metric: 10 No protocols redistributed Distance: 115 Advertise Passive Interface Prefixes Only: No Interfaces supported by IS-IS 1: Loopback0 is running passively (passive in configuration) GigabitEthernet0/0/0/0 is running actively (active in configuration) GigabitEthernet0/0/0/1 is running actively (active in configuration) RP/0/RP0/CPU0:R3#show isis hostname Thu Sep 10 14:16:07.000 UTC IS-IS 1 hostnames Level System ID Dynamic Hostname 2 0010.0100.1001 R1 2 0020.0200.2002 R2 2 * 0030.0300.3003 R3 2 0040.0400.4004 R4 RP/0/RP0/CPU0:R3#show isis interface brief Thu Sep 10 14:16:07.145 UTC IS-IS 1 Interfaces Interface All Adjs Adj Topos Adv Topos CLNS MTU Prio OK L1 L2 Run/Cfg Run/Cfg L1 L2 ----------------- --- --------- --------- --------- ---- ---- -------- Lo0 Yes - - 0/0 1/1 No - - - Gi0/0/0/0 Yes - 2 1/1 1/1 Up 1497 - 64 Gi0/0/0/1 Yes - 1 1/1 1/1 Up 1497 - - RP/0/RP0/CPU0:R3#show isis neighbors Thu Sep 10 14:16:07.272 UTC IS-IS 1 neighbors: System Id Interface SNPA State Holdtime Type IETF-NSF R1 Gi0/0/0/0 5254.00a6.5d45 Up 27 L2 Capable R2 Gi0/0/0/0 5254.00bc.1d81 Up 9 L2 Capable R4 Gi0/0/0/1 *PtoP* Up 20 L2 Capable Total neighbor count: 3 RP/0/RP0/CPU0:R3#show isis database Thu Sep 10 14:16:07.417 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 0x0000000a 0x6036 1108 /1200 0/0/0 R2.00-00 0x0000000f 0xa79a 664 /1200 0/0/0 R2.01-00 0x00000008 0x4764 396 /1200 0/0/0 R3.00-00 * 0x00000009 0xea31 408 /* 0/0/0 R4.00-00 0x00000009 0xa965 419 /1200 0/0/0 Total Level-2 LSP count: 5 Local Level-2 LSP count: 1 RP/0/RP0/CPU0:R3#show isis database detail Thu Sep 10 14:16:07.611 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 0x0000000a 0x6036 1108 /1200 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 1.1.1.1 Hostname: R1 Metric: 10 IS-Extended R2.01 Metric: 0 IP-Extended 1.1.1.1/32 Metric: 10 IP-Extended 10.1.0.0/24 R2.00-00 0x0000000f 0xa79a 663 /1200 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 2.2.2.2 Hostname: R2 Metric: 10 IS-Extended R2.01 Metric: 10 IS-Extended R4.00 Metric: 0 IP-Extended 2.2.2.2/32 Metric: 10 IP-Extended 10.1.0.0/24 Metric: 10 IP-Extended 10.2.4.0/24 R2.01-00 0x00000008 0x4764 396 /1200 0/0/0 Metric: 0 IS-Extended R3.00 Metric: 0 IS-Extended R1.00 Metric: 0 IS-Extended R2.00 R3.00-00 * 0x00000009 0xea31 408 /* 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 3.3.3.3 Hostname: R3 Metric: 10 IS-Extended R2.01 Metric: 10 IS-Extended R4.00 Metric: 0 IP-Extended 3.3.3.3/32 Metric: 10 IP-Extended 10.1.0.0/24 Metric: 10 IP-Extended 10.3.4.0/24 R4.00-00 0x00000009 0xa965 419 /1200 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 4.4.4.4 Hostname: R4 Metric: 10 IS-Extended R2.00 Metric: 10 IS-Extended R3.00 Metric: 0 IP-Extended 4.4.4.4/32 Metric: 10 IP-Extended 10.2.4.0/24 Metric: 10 IP-Extended 10.3.4.0/24 Total Level-2 LSP count: 5 Local Level-2 LSP count: 1 RP/0/RP0/CPU0:R3#show isis topology Thu Sep 10 14:16:07.914 UTC IS-IS 1 paths to IPv4 Unicast (Level-2) routers System Id Metric Next-Hop Interface SNPA R1 10 R1 Gi0/0/0/0 5254.00a6.5d45 R2 10 R2 Gi0/0/0/0 5254.00bc.1d81 R3 -- R4 10 R4 Gi0/0/0/1 *PtoP* RP/0/RP0/CPU0:R3#show isis route Thu Sep 10 14:16:08.100 UTC IS-IS 1 IPv4 Unicast routes Codes: L1 - level 1, L2 - level 2, ia - interarea (leaked into level 1) df - level 1 default (closest attached router), su - summary null C - connected, S - static, R - RIP, B - BGP, O - OSPF E - EIGRP, A - access/subscriber, M - mobile, a - application i - IS-IS (redistributed from another instance) Maximum parallel path count: 8 L2 1.1.1.1/32 [10/115] via 10.1.0.1, GigabitEthernet0/0/0/0, R1, Weight: 0 L2 2.2.2.2/32 [10/115] via 10.1.0.2, GigabitEthernet0/0/0/0, R2, Weight: 0 C 3.3.3.3/32 is directly connected, Loopback0 L2 4.4.4.4/32 [10/115] via 10.3.4.4, GigabitEthernet0/0/0/1, R4, Weight: 0 C 10.1.0.0/24 is directly connected, GigabitEthernet0/0/0/0 L2 10.2.4.0/24 [20/115] via 10.1.0.2, GigabitEthernet0/0/0/0, R2, Weight: 0 via 10.3.4.4, GigabitEthernet0/0/0/1, R4, Weight: 0 C 10.3.4.0/24 is directly connected, GigabitEthernet0/0/0/1 RP/0/RP0/CPU0:R3#show isis adjacency-log Thu Sep 10 14:16:08.266 UTC IS-IS 1 Level 2 Adjacency Log Capacity: 100, Size: 6 When System Interface State Details --- Thu Sep 10 2026 --- 13:33:35.998 R1 Gi0/0/0/0 d -> i 13:33:36.309 R2 Gi0/0/0/0 d -> i 13:33:36.916 R1 Gi0/0/0/0 i -> u New adjacency IPv4 Unicast Up 13:33:37.309 R2 Gi0/0/0/0 i -> u New adjacency IPv4 Unicast Up 13:34:40.063 R4 Gi0/0/0/1 d -> i 13:34:40.670 R4 Gi0/0/0/1 i -> u New adjacency IPv4 Unicast Up RP/0/RP0/CPU0:R3#show isis spf-log Thu Sep 10 14:16:08.449 UTC IS-IS 1 Level 2 IPv4 Unicast Route Calculation Log Capacity: 210, Size: 21 Time Total Trig. Timestamp Type (ms) Nodes Count First Trigger LSP Triggers ------------ ----- ----- ----- ----- -------------------- ---------------------- --- Thu Sep 10 2026 --- 13:33:35.605 FSPF 0 1 7 R3.00-00 CONFIG NEWNODE NEWLSP OVLSET PREFIXGOOD AREAADDR IPADDR 13:33:37.018 FSPF 0 1 2 R3.00-00 OVLCLR PREFIXGOOD 13:33:39.002 FSPF 0 4 4 R3.00-00 NEWNODE NEWLSP LINKGOOD 13:33:40.049 FSPF 0 4 1 R2.01-00 LINKGOOD 13:33:47.815 FSPF 2 4 12 R1.00-00 NEWNODE NEWLSP LINKGOOD PREFIXGOOD AREAADDR IPADDR 13:34:41.946 FSPF 0 5 5 R4.00-00 NEWNODE NEWLSP PREFIXGOOD AREAADDR IPADDR 13:34:43.069 FSPF 0 5 1 R4.00-00 LINKGOOD 13:34:44.368 FSPF 2 5 2 R3.00-00 LINKGOOD 13:37:53.123 FSPF 1 5 2 R2.00-00 LINKBAD PREFIXBAD 13:39:03.124 FSPF 1 5 2 R2.00-00 LINKGOOD PREFIXGOOD 13:54:03.176 FSPF 0 5 1 PERIODIC 13:56:03.323 FSPF 2 5 2 R2.00-00 LINKBAD PREFIXBAD 13:59:26.325 FSPF 0 5 2 R2.00-00 LINKBAD PREFIXBAD 14:02:08.623 FSPF 1 5 2 R2.00-00 LINKGOOD PREFIXGOOD 14:02:33.063 FSPF 3 5 2 R1.00-00 LINKBAD PREFIXBAD 14:02:44.523 FSPF 2 5 3 R2.00-00 LINKBAD PREFIXBAD 14:02:55.835 FSPF 0 5 23 R1.00-00 CONFIG DELNODE LSPEXPIRY LINKBAD PREFIXBAD AREAADDR IPADDR 14:02:56.036 FSPF 2 5 26 R1.00-00 CONFIG NEWNODE NEWLSP LINKGOOD PREFIXGOOD AREAADDR IPADDR 14:03:07.290 FSPF 2 5 2 R4.00-00 LINKGOOD PREFIXGOOD 14:05:26.824 FSPF 0 5 2 R2.00-00 LINKBAD PREFIXBAD 14:07:11.723 FSPF 1 5 2 R2.00-00 LINKGOOD PREFIXGOOD RP/0/RP0/CPU0:R3#show isis lsp-log Thu Sep 10 14:16:08.611 UTC IS-IS 1 Level 2 LSP Generation Log Capacity: 50, Size: 7 When Count Interface Triggers --- Thu Sep 10 2026 --- 13:33:25.696 1 CONFIG 13:33:27.808 1 CONFIG 13:33:32.472 1 Lo0 IPUP 13:33:36.967 3 Gi0/0/0/0 NEWADJ LSPDBOL MSD 13:33:38.951 1 Gi0/0/0/0 DIS 13:34:44.315 1 Gi0/0/0/1 SABIT 14:02:55.903 1 Lo0 IPDOWN RP/0/RP0/CPU0:R3#show isis statistics Thu Sep 10 14:16:08.769 UTC IS-IS 1 Packet and Event Statistics Dropped Dropped Total PDUs Sent Received On Input By Update Hello: 590 1456 0 - CSNP: 1 293 - 0 PSNP: 18 20 0 0 LSP: 33 48 0 0 LSP Retransmissions: 0 LSP Checksum Errors: 0 IS-IS Update Queue: 0/3500 Total Traffic: 361 High Water Mark: 4 HWM Set: Thu 2026 Sep 10 13:34:41.978 UTC Total Drops: 0 IS-IS Input Queue: 0/4200 Total Traffic: 1818 High Water Mark: 4 Total Drops: 0 Level-2 LSPs sourced (new/refresh): 9/2 Route Calculations IPv4 Unicast Total: 21 Full SPF Calculations: 21 Periodic: 1 Partial Route Calc: 0 Next Hop Calculations: 0 RP/0/RP0/CPU0:R3#show cef Thu Sep 10 14:16:08.878 UTC Prefix Next Hop Interface ------------------- ------------------- ------------------ 0.0.0.0/0 drop default handler 0.0.0.0/32 broadcast 1.1.1.1/32 10.1.0.1/32 GigabitEthernet0/0/0/0 2.2.2.2/32 10.1.0.2/32 GigabitEthernet0/0/0/0 3.3.3.3/32 receive Loopback0 4.4.4.4/32 10.3.4.4/32 GigabitEthernet0/0/0/1 10.1.0.0/24 attached GigabitEthernet0/0/0/0 10.1.0.0/32 broadcast GigabitEthernet0/0/0/0 10.1.0.1/32 10.1.0.1/32 GigabitEthernet0/0/0/0 10.1.0.2/32 10.1.0.2/32 GigabitEthernet0/0/0/0 10.1.0.3/32 receive GigabitEthernet0/0/0/0 10.1.0.255/32 broadcast GigabitEthernet0/0/0/0 10.2.4.0/24 10.1.0.2/32 GigabitEthernet0/0/0/0 10.3.4.4/32 GigabitEthernet0/0/0/1 10.3.4.0/24 attached GigabitEthernet0/0/0/1 10.3.4.0/32 broadcast GigabitEthernet0/0/0/1 10.3.4.3/32 receive GigabitEthernet0/0/0/1 10.3.4.4/32 10.3.4.4/32 GigabitEthernet0/0/0/1 10.3.4.255/32 broadcast GigabitEthernet0/0/0/1 224.0.0.0/4 0.0.0.0/32 224.0.0.0/24 receive 255.255.255.255/32 broadcast RP/0/RP0/CPU0:R3#show route summary Thu Sep 10 14:16:09.114 UTC Route Source Routes Backup Deleted Memory(bytes) local 3 0 0 600 connected 2 1 0 600 application fib_mgr 0 0 0 0 dagr 0 0 0 0 isis 1 4 2 0 1280 Total 9 3 0 2480