RP/0/RP0/CPU0:R4#show version Wed Sep 23 22:34:35.585 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 R4 uptime is 28 minutes XRd Control Plane Container RP/0/RP0/CPU0:R4#show interface description Wed Sep 23 22:34:35.720 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 R1 (10.0.14.0/24 p2p) Gi0/0/0/1 up up to R5 (10.0.45.0/24 p2p) Gi0/0/0/2 admin-down admin-down RP/0/RP0/CPU0:R4#show route Wed Sep 23 22:34:35.981 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 [115/20] via 10.0.14.1, 00:25:17, GigabitEthernet0/0/0/0 i L2 2.2.2.2/32 [115/30] via 10.0.14.1, 00:02:28, GigabitEthernet0/0/0/0 i L2 3.3.3.3/32 [115/40] via 10.0.14.1, 00:02:28, GigabitEthernet0/0/0/0 L 4.4.4.4/32 is directly connected, 00:25:28, Loopback0 i L2 5.5.5.5/32 [115/20] via 10.0.45.5, 00:25:07, GigabitEthernet0/0/0/1 i L2 6.6.6.6/32 [115/40] via 10.0.45.5, 00:25:07, GigabitEthernet0/0/0/1 i L2 10.0.12.0/24 [115/30] via 10.0.14.1, 00:02:29, GigabitEthernet0/0/0/0 C 10.0.14.0/24 is directly connected, 00:25:22, GigabitEthernet0/0/0/0 L 10.0.14.4/32 is directly connected, 00:25:22, GigabitEthernet0/0/0/0 i L2 10.0.23.0/24 [115/40] via 10.0.14.1, 00:02:28, GigabitEthernet0/0/0/0 i L2 10.0.36.0/24 [115/50] via 10.0.14.1, 00:02:28, GigabitEthernet0/0/0/0 [115/50] via 10.0.45.5, 00:02:28, GigabitEthernet0/0/0/1 C 10.0.45.0/24 is directly connected, 00:25:22, GigabitEthernet0/0/0/1 L 10.0.45.4/32 is directly connected, 00:25:22, GigabitEthernet0/0/0/1 i L2 10.0.56.0/24 [115/40] via 10.0.45.5, 00:25:07, GigabitEthernet0/0/0/1 RP/0/RP0/CPU0:R4#show route isis Wed Sep 23 22:34:36.229 UTC i L2 1.1.1.1/32 [115/20] via 10.0.14.1, 00:25:18, GigabitEthernet0/0/0/0 i L2 2.2.2.2/32 [115/30] via 10.0.14.1, 00:02:28, GigabitEthernet0/0/0/0 i L2 3.3.3.3/32 [115/40] via 10.0.14.1, 00:02:28, GigabitEthernet0/0/0/0 i L2 5.5.5.5/32 [115/20] via 10.0.45.5, 00:25:08, GigabitEthernet0/0/0/1 i L2 6.6.6.6/32 [115/40] via 10.0.45.5, 00:25:08, GigabitEthernet0/0/0/1 i L2 10.0.12.0/24 [115/30] via 10.0.14.1, 00:02:29, GigabitEthernet0/0/0/0 i L2 10.0.23.0/24 [115/40] via 10.0.14.1, 00:02:28, GigabitEthernet0/0/0/0 i L2 10.0.36.0/24 [115/50] via 10.0.14.1, 00:02:28, GigabitEthernet0/0/0/0 [115/50] via 10.0.45.5, 00:02:28, GigabitEthernet0/0/0/1 i L2 10.0.56.0/24 [115/40] via 10.0.45.5, 00:25:08, GigabitEthernet0/0/0/1 RP/0/RP0/CPU0:R4#show isis Wed Sep 23 22:34:36.399 UTC IS-IS Router: 1 System Id: 0040.0400.4004 Hostname: R4 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: 4387 Respawn count: 1 Started: Wed 2026 Sep 23 22:08:55.728 UTC Null0 ready: Wed 2026 Sep 23 22:08:57.420 UTC Protocol shutdown: No System memory state: Normal Last change: never Memory state: Normal Last change: never Last/Initial memory usage/limit: 1594831/2147483648 0% Memory state monitoring interval: 60 s Memory usage/limit: 13876444/2147483648 0% Memory usage specifics (count/bytes): Nodes: 6/2448 LSPs: 6/2506 Links: 12/14688 Prefixes: 18/16560 Nets: 12/7872 Paths: 24/2304 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: Wed 2026 Sep 23 22:08:58.524 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:R4#show isis interface Wed Sep 23 22:34:36.622 UTC IS-IS 1 Interfaces Loopback0 Enabled Adjacency Formation: Disabled (Passive in IS-IS cfg) Prefix Advertisement: Enabled Bandwidth: 0 Circuit Type: level-2-only (Configured: level-1-2) Media Type: Loop Circuit Number: 0 IPv4 Unicast Topology: Enabled Adjacency Formation: Disabled (Intf passive in IS-IS cfg) Prefix Advertisement: Running Policy (L1/L2): -/- Metric (L1/L2): 0/0 Metric fallback: Bandwidth (L1/L2): Inactive/Inactive Anomaly (L1/L2): Inactive/Inactive Weight (L1/L2): 0/0 MPLS Max Label Stack: 0/0/0/0 (PRI/BKP/SRTE/SRAT) MPLS LDP Sync (L1/L2): Disabled/Disabled IPv4 Address Family: Enabled Protocol State: Up Forwarding Address: None (Intf passive in IS-IS cfg) Global Prefix: 4.4.4.4/32 PME Link Delays and Loss: - GigabitEthernet0/0/0/0 Enabled Adjacency Formation: Enabled Prefix Advertisement: Enabled Bandwidth: 1000000 RSI SRLG: Not Registered Circuit Type: level-2-only (Configured: level-1-2) Media Type: P2P Circuit Number: 0 Extended Circuit Number: 5 Last IIH Received: 22:34:35 (0.96 sec ago), 1497 octets Last IIH Sent: 22:34:31 (5.69 sec ago), 1497 octets Sending next P2P IIH in: 3 s IPv4 BFD: Disabled IPv6 BFD: Disabled Level-2 Adjacency Count: 1 Adjacency Flaps: 0 LSP Pacing Interval: 33 ms PSNP Entry Queue Size: 0 Hello Interval: 10 s Hello Multiplier: 3 CLNS I/O Protocol State: Up MTU: 1497 SNPA: 5254.0040.8651 Layer-2 Multicast: All ISs: Listening IPv4 Unicast Topology: Enabled Adjacency Formation: Running Prefix Advertisement: Running Policy (L1/L2): -/- Metric (L1/L2): 20/20 Metric fallback: Bandwidth (L1/L2): Inactive/Inactive Anomaly (L1/L2): Inactive/Inactive Weight (L1/L2): 0/0 MPLS Max Label Stack: 1/3/7/7 (PRI/BKP/SRTE/SRAT) MPLS LDP Sync (L1/L2): Disabled/Disabled FRR (L1/L2): L1 Not Enabled L2 Not Enabled FRR Type: None None IPv4 Address Family: Enabled Protocol State: Up Forwarding Address: 10.0.14.4 Global Prefix: 10.0.14.0/24 LSP Transmission is: idle LSP Transmit Timer in: 0 ms LSP Burst Size: 9 LSPs in the next 0 ms LSP Rexmit Queue Size: 0 Adjacency Up: 22:09:14.800 Received CSNP complete: 22:09:15.539 LSP Pacing Start: 22:09:15.539 LSP fast flooding: Disabled PME Link Delays and Loss: - GigabitEthernet0/0/0/1 Enabled Adjacency Formation: Enabled Prefix Advertisement: Enabled Bandwidth: 1000000 RSI SRLG: Not Registered Circuit Type: level-2-only (Configured: level-1-2) Media Type: P2P Circuit Number: 0 Extended Circuit Number: 3 Last IIH Received: 22:34:29 (7.28 sec ago), 1497 octets Last IIH Sent: 22:34:27 (9.04 sec ago), 1497 octets Sending next P2P IIH in: 23 ms IPv4 BFD: Disabled IPv6 BFD: Disabled Level-2 Adjacency Count: 1 Adjacency Flaps: 0 LSP Pacing Interval: 33 ms PSNP Entry Queue Size: 0 Hello Interval: 10 s Hello Multiplier: 3 CLNS I/O Protocol State: Up MTU: 1497 SNPA: 5254.00a6.47df Layer-2 Multicast: All ISs: Listening IPv4 Unicast Topology: Enabled Adjacency Formation: Running Prefix Advertisement: Running Policy (L1/L2): -/- Metric (L1/L2): 20/20 Metric fallback: Bandwidth (L1/L2): Inactive/Inactive Anomaly (L1/L2): Inactive/Inactive Weight (L1/L2): 0/0 MPLS Max Label Stack: 1/3/7/7 (PRI/BKP/SRTE/SRAT) MPLS LDP Sync (L1/L2): Disabled/Disabled FRR (L1/L2): L1 Not Enabled L2 Not Enabled FRR Type: None None IPv4 Address Family: Enabled Protocol State: Up Forwarding Address: 10.0.45.4 Global Prefix: 10.0.45.0/24 LSP Transmission is: idle LSP Transmit Timer in: 0 ms LSP Burst Size: 9 LSPs in the next 0 ms LSP Rexmit Queue Size: 0 Adjacency Up: 22:09:20.844 Received CSNP complete: 22:09:21.152 LSP Pacing Start: 22:09:21.152 LSP fast flooding: Disabled PME Link Delays and Loss: - RP/0/RP0/CPU0:R4#show isis neighbors Wed Sep 23 22:34:36.829 UTC IS-IS 1 neighbors: System Id Interface SNPA State Holdtime Type IETF-NSF R1 Gi0/0/0/0 *PtoP* Up 28 L2 Capable R5 Gi0/0/0/1 *PtoP* Up 22 L2 Capable Total neighbor count: 2 RP/0/RP0/CPU0:R4#show isis neighbors detail Wed Sep 23 22:34:36.995 UTC IS-IS 1 neighbors: System Id Interface SNPA State Holdtime Type IETF-NSF R1 Gi0/0/0/0 *PtoP* Up 28 L2 Capable Area Address(es): 49.0001 IPv4 Address(es): 10.0.14.1* Topologies: 'IPv4 Unicast' Uptime: 00:25:22 R5 Gi0/0/0/1 *PtoP* Up 22 L2 Capable Area Address(es): 49.0001 IPv4 Address(es): 10.0.45.5* Topologies: 'IPv4 Unicast' Uptime: 00:25:16 Total neighbor count: 2 RP/0/RP0/CPU0:R4#show isis topology Wed Sep 23 22:34:37.191 UTC IS-IS 1 paths to IPv4 Unicast (Level-2) routers System Id Metric Next-Hop Interface SNPA R1 20 R1 Gi0/0/0/0 *PtoP* R2 30 R1 Gi0/0/0/0 *PtoP* R3 40 R1 Gi0/0/0/0 *PtoP* R4 -- R5 20 R5 Gi0/0/0/1 *PtoP* R6 40 R5 Gi0/0/0/1 *PtoP* RP/0/RP0/CPU0:R4#show isis database Wed Sep 23 22:34:37.388 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 0x0000000d 0x4405 1049 /1200 0/0/0 R2.00-00 0x0000000d 0xcca0 1049 /1200 0/0/0 R3.00-00 0x00000008 0x3175 1094 /1200 0/0/0 R4.00-00 * 0x00000008 0x2473 1150 /* 0/0/0 R5.00-00 0x00000006 0x7e3d 381 /1200 0/0/0 R6.00-00 0x00000008 0x7a75 417 /1200 0/0/0 Total Level-2 LSP count: 6 Local Level-2 LSP count: 1 RP/0/RP0/CPU0:R4#show isis database detail Wed Sep 23 22:34:37.550 UTC IS-IS 1 (Level-2) Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL R1.00-00 0x0000000d 0x4405 1049 /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 R2.00 Metric: 20 IS-Extended R4.00 Metric: 0 IP-Extended 1.1.1.1/32 Metric: 10 IP-Extended 10.0.12.0/24 Metric: 20 IP-Extended 10.0.14.0/24 R2.00-00 0x0000000d 0xcca0 1049 /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 R1.00 Metric: 10 IS-Extended R3.00 Metric: 0 IP-Extended 2.2.2.2/32 Metric: 10 IP-Extended 10.0.12.0/24 Metric: 10 IP-Extended 10.0.23.0/24 R3.00-00 0x00000008 0x3175 1094 /1200 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 3.3.3.3 Hostname: R3 Metric: 10 IS-Extended R2.00 Metric: 10 IS-Extended R6.00 Metric: 0 IP-Extended 3.3.3.3/32 Metric: 10 IP-Extended 10.0.23.0/24 Metric: 10 IP-Extended 10.0.36.0/24 R4.00-00 * 0x00000008 0x2473 1150 /* 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 4.4.4.4 Hostname: R4 Metric: 20 IS-Extended R1.00 Metric: 20 IS-Extended R5.00 Metric: 0 IP-Extended 4.4.4.4/32 Metric: 20 IP-Extended 10.0.14.0/24 Metric: 20 IP-Extended 10.0.45.0/24 R5.00-00 0x00000006 0x7e3d 381 /1200 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 5.5.5.5 Hostname: R5 Metric: 20 IS-Extended R4.00 Metric: 20 IS-Extended R6.00 Metric: 0 IP-Extended 5.5.5.5/32 Metric: 20 IP-Extended 10.0.45.0/24 Metric: 20 IP-Extended 10.0.56.0/24 R6.00-00 0x00000008 0x7a75 417 /1200 0/0/0 Area Address: 49.0001 LSP MTU: 1492 NLPID: 0xcc IP Address: 6.6.6.6 Hostname: R6 Metric: 10 IS-Extended R3.00 Metric: 20 IS-Extended R5.00 Metric: 0 IP-Extended 6.6.6.6/32 Metric: 10 IP-Extended 10.0.36.0/24 Metric: 20 IP-Extended 10.0.56.0/24 Total Level-2 LSP count: 6 Local Level-2 LSP count: 1 RP/0/RP0/CPU0:R4#show isis spf-log Wed Sep 23 22:34:37.691 UTC IS-IS 1 Level 2 IPv4 Unicast Route Calculation Log Capacity: 210, Size: 22 Time Total Trig. Timestamp Type (ms) Nodes Count First Trigger LSP Triggers ------------ ----- ----- ----- ----- -------------------- ---------------------- --- Wed Sep 23 2026 --- 22:08:58.741 FSPF 0 0 2 CONFIG 22:09:08.715 FSPF 0 1 7 R4.00-00 CONFIG NEWNODE NEWLSP OVLSET PREFIXGOOD AREAADDR IPADDR 22:09:10.866 FSPF 48 1 1 R4.00-00 OVLCLR 22:09:13.466 PRC 0 1 1 R4.00-00 PREFIXGOOD 22:09:15.066 FSPF 0 5 25 R1.00-00 NEWNODE NEWLSP LINKGOOD PREFIXGOOD AREAADDR IPADDR 22:09:18.267 FSPF 2 5 1 R1.00-00 LINKGOOD 22:09:23.270 FSPF 0 6 6 R5.00-00 NEWNODE NEWLSP LINKGOOD PREFIXGOOD AREAADDR IPADDR 22:09:28.271 FSPF 1 6 2 R4.00-00 LINKGOOD 22:15:04.445 FSPF 2 6 1 R2.00-00 LINKBAD 22:15:06.266 FSPF 0 6 1 R1.00-00 LINKBAD 22:15:47.556 FSPF 0 6 1 R1.00-00 LINKGOOD 22:15:47.869 FSPF 2 6 1 R2.00-00 LINKGOOD 22:20:28.593 FSPF 2 6 1 R2.00-00 LINKBAD 22:20:29.549 FSPF 0 6 1 R1.00-00 LINKBAD 22:24:25.912 FSPF 0 6 1 R1.00-00 LINKGOOD 22:24:26.221 FSPF 2 6 1 R2.00-00 LINKGOOD 22:28:13.143 FSPF 2 6 2 R2.00-00 LINKBAD PREFIXBAD 22:28:13.347 FSPF 1 6 2 R1.00-00 LINKBAD PREFIXBAD 22:32:06.289 PRC 1 6 1 R2.00-00 PREFIXGOOD 22:32:06.492 PRC 1 6 1 R1.00-00 PREFIXGOOD 22:32:06.949 FSPF 0 6 1 R1.00-00 LINKGOOD 22:32:07.750 FSPF 2 6 1 R2.00-00 LINKGOOD RP/0/RP0/CPU0:R4#show isis lsp-log Wed Sep 23 22:34:37.860 UTC IS-IS 1 Level 2 LSP Generation Log Capacity: 50, Size: 6 When Count Interface Triggers --- Wed Sep 23 2026 --- 22:08:58.803 1 CONFIG 22:09:07.615 1 Lo0 IPUP 22:09:10.816 1 LSPDBOL 22:09:13.378 2 Gi0/0/0/1 IPUP MSD 22:09:14.979 1 Gi0/0/0/0 NEWADJ 22:09:24.608 1 Gi0/0/0/1 SABIT RP/0/RP0/CPU0:R4#show isis adjacency-log Wed Sep 23 22:34:37.999 UTC IS-IS 1 Level 2 Adjacency Log Capacity: 100, Size: 4 When System Interface State Details --- Wed Sep 23 2026 --- 22:09:13.930 R1 Gi0/0/0/0 d -> i 22:09:14.801 R1 Gi0/0/0/0 i -> u New adjacency IPv4 Unicast Up 22:09:20.236 R5 Gi0/0/0/1 d -> i 22:09:20.844 R5 Gi0/0/0/1 i -> u New adjacency IPv4 Unicast Up RP/0/RP0/CPU0:R4#show running-config router isis Wed Sep 23 22:34:38.136 UTC router isis 1 is-type level-2-only net 49.0001.0040.0400.4004.00 log adjacency changes address-family ipv4 unicast metric-style wide ! interface Loopback0 passive address-family ipv4 unicast ! ! interface GigabitEthernet0/0/0/0 point-to-point address-family ipv4 unicast metric 20 ! ! interface GigabitEthernet0/0/0/1 point-to-point address-family ipv4 unicast metric 20 ! ! !